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  <xsd:element id="paa_StorageTerminallingProcessingAndRelatedRevenues" name="StorageTerminallingProcessingAndRelatedRevenues" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_PurchasesAndRelatedCosts" name="PurchasesAndRelatedCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_InterestIncomeAndOtherIncomeExpenseNet" name="InterestIncomeAndOtherIncomeExpenseNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest" name="IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_IncomeNotSubjectToForeignTax" name="IncomeNotSubjectToForeignTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_IncomeSubjectToForeignTax" name="IncomeSubjectToForeignTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_ForeignTaxRate" name="ForeignTaxRate" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_GainLossOnSaleOfLinefill" name="GainLossOnSaleOfLinefill" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_NetCashPaidForTerminatedInterestRateAndForeignCurrencyHedgingInstruments" name="NetCashPaidForTerminatedInterestRateAndForeignCurrencyHedgingInstruments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_PaymentsToAcquireLinefillInAssetsOwned" name="PaymentsToAcquireLinefillInAssetsOwned" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_CashReceivedPaidForLinefillNet" name="CashReceivedPaidForLinefillNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_NetProceedsFromRepaymentsOfShortTermLetterOfCreditAndHedgedInventoryFacility" name="NetProceedsFromRepaymentsOfShortTermLetterOfCreditAndHedgedInventoryFacility" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_NetProceedsFromRepaymentsOfSubsidiaryRevolvingCreditFacilities" name="NetProceedsFromRepaymentsOfSubsidiaryRevolvingCreditFacilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_ProceedsFromIssuanceOfCommonLimitedPartnersUnitholdersNetOfIssuanceCosts" name="ProceedsFromIssuanceOfCommonLimitedPartnersUnitholdersNetOfIssuanceCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_PartnersCapitalAccountUnitBasedCompensationLongTermIncentivePlans" name="PartnersCapitalAccountUnitBasedCompensationLongTermIncentivePlans" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_PartnersCapitalAccountUnitBasedCompensationClassBUnits" name="PartnersCapitalAccountUnitBasedCompensationClassBUnits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_PartnersCapitalAccountUnitsIssuedUnitBasedCompensationLongTermIncentivePlans" name="PartnersCapitalAccountUnitsIssuedUnitBasedCompensationLongTermIncentivePlans" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_StatementOfChangesInAccumulatedOtherComprehensiveIncomeAbstract" name="StatementOfChangesInAccumulatedOtherComprehensiveIncomeAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_ChangesInAccumulatedOtherComprehensiveIncomeTable" name="ChangesInAccumulatedOtherComprehensiveIncomeTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_ChangesInAccumulatedOtherComprehensiveIncomeAxis" name="ChangesInAccumulatedOtherComprehensiveIncomeAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ChangesInAccumulatedOtherComprehensiveIncomeComponentsDomain" name="ChangesInAccumulatedOtherComprehensiveIncomeComponentsDomain" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AccumulatedOtherComprehensiveIncomeOtherAdjustmentsMember" name="AccumulatedOtherComprehensiveIncomeOtherAdjustmentsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_ChangesInAccumulatedOtherComprehensiveIncomeLineItems" name="ChangesInAccumulatedOtherComprehensiveIncomeLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_DistributionMadeToCommonUnitHolderOrLimitedPartnerCashFlowSide" name="DistributionMadeToCommonUnitHolderOrLimitedPartnerCashFlowSide" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_ProceedsFromPaymentsForOtherFinancingActivitiesCCFI" name="ProceedsFromPaymentsForOtherFinancingActivitiesCCFI" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_IncreaseDecreaseInAccumulatedOtherComprehensiveIncomeRollForward" name="IncreaseDecreaseInAccumulatedOtherComprehensiveIncomeRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_OtherComprehensiveIncomePartnershipsPortionOfEquityInvestee" name="OtherComprehensiveIncomePartnershipsPortionOfEquityInvestee" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_DocumentEntityInformationAbstract" name="DocumentEntityInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_InventoryLinefillAndBaseGasAndLongTermInventoryTextBlock" name="InventoryLinefillAndBaseGasAndLongTermInventoryTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NetIncomePerLimitedPartnerUnitTextBlock" name="NetIncomePerLimitedPartnerUnitTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_GainOnConversionsOfEquityMethodInvestment" name="GainOnConversionsOfEquityMethodInvestment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_AcquisitionsAndDispositionsDisclosureTextBlock" name="AcquisitionsAndDispositionsDisclosureTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_DeferredIncomeTaxExpenseBenefitCashFlowImpact" name="DeferredIncomeTaxExpenseBenefitCashFlowImpact" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_CanadianWithholdingTaxDistributionOnBehalfOfShareholders" name="CanadianWithholdingTaxDistributionOnBehalfOfShareholders" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_FieldOperatingCosts" name="FieldOperatingCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_OrganizationAndBasisOfPresentationDisclosureAbstract" name="OrganizationAndBasisOfPresentationDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_RecentAccountingPronouncementsDisclosureAbstract" name="RecentAccountingPronouncementsDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_TradeAccountsReceivableDisclosureAbstract" name="TradeAccountsReceivableDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_AcquisitionsDisclosureAbstract" name="AcquisitionsDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_InventoryLinefillBaseGasAndLongTermInventoryDisclosureAbstract" name="InventoryLinefillBaseGasAndLongTermInventoryDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_DebtDisclosureAbstract" name="DebtDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_NetIncomePerLimitedPartnerUnitDisclosureAbstract" name="NetIncomePerLimitedPartnerUnitDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_PartnersCapitalAndDistributionsDisclosureAbstract" name="PartnersCapitalAndDistributionsDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ConcentrationRiskPercentageNotMet" name="ConcentrationRiskPercentageNotMet" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_ModificationOfHoldingsUnitsPriorToModification" name="ModificationOfHoldingsUnitsPriorToModification" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="paa_EquityCompensationPlansDisclosureAbstract" name="EquityCompensationPlansDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_DerivativesAndHedgingInstrumentsDisclosureAbstract" name="DerivativesAndHedgingInstrumentsDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfCondensedConsolidatingBalanceSheetTableTextBlock" name="ScheduleOfCondensedConsolidatingBalanceSheetTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfCondensedConsolidatingStatementsOfOperationsTableTextBlock" name="ScheduleOfCondensedConsolidatingStatementsOfOperationsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfCondensedConsolidatingStatementsOfCashFlowsTableTextBlock" name="ScheduleOfCondensedConsolidatingStatementsOfCashFlowsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_IncomeTaxesDisclosureAbstract" name="IncomeTaxesDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_RevenuesAndExpensesRelatedParties" name="RevenuesAndExpensesRelatedParties" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_DueFromToRelatedParties" name="DueFromToRelatedParties" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" name="ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfIncomeTaxExpenseBenefitReconciliationTableTextBlock" name="ScheduleOfIncomeTaxExpenseBenefitReconciliationTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" name="ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_CommitmentsAndContingenciesDisclosureAbstract" name="CommitmentsAndContingenciesDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_OperatingAndCapitalLeasesFutureMinimumPaymentsDueCurrent" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInTwoYears" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueInTwoYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInThreeYears" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueInThreeYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFourYears" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFourYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFiveYears" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFiveYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_OperatingAndCapitalLeasesFutureMinimumPaymentsDueThereafter" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueThereafter" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_OperatingAndCapitalLeasesFutureMinimumPaymentsDue" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_OperatingAndCapitalLeaseExpenditures" name="OperatingAndCapitalLeaseExpenditures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfQuarterlyFinancialInformationTableTextBlock" name="ScheduleOfQuarterlyFinancialInformationTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_OperatingSegmentsDisclosureAbstract" name="OperatingSegmentsDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_SupplementalCondensedConsolidatingFinancialInformationDisclosureAbstract" name="SupplementalCondensedConsolidatingFinancialInformationDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_SubsequentEventsDisclosureAbstract" name="SubsequentEventsDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfNotionalAmountsOfOutstandingForeignCurrencyExchangeContractsTableTextBlock" name="ScheduleOfNotionalAmountsOfOutstandingForeignCurrencyExchangeContractsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock" name="ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfLongTermIncentivePlanAwardsOutstandingAndExpectedToVestTableTextBlock" name="ScheduleOfLongTermIncentivePlanAwardsOutstandingAndExpectedToVestTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfLongTermIncentivePlanAwardsOfSubsidiaryOutstandingAndExpectedToVestTableTextBlock" name="ScheduleOfLongTermIncentivePlanAwardsOfSubsidiaryOutstandingAndExpectedToVestTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfShareBasedCompensationClassBUnitsAwardActivityTableTextBlock" name="ScheduleOfShareBasedCompensationClassBUnitsAwardActivityTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfShareBasedPaymentAwardsExpensesTableTextBlock" name="ScheduleOfShareBasedPaymentAwardsExpensesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAmortizationTableTextBlock" name="ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAmortizationTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_DisposalGroupsIncludingDiscontinuedOperationsDisclosureAbstract" name="DisposalGroupsIncludingDiscontinuedOperationsDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_MajorCustomersAndConcentrationOfCreditRiskDisclosureAbstract" name="MajorCustomersAndConcentrationOfCreditRiskDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_RelatedPartyTransactionsDisclosureAbstract" name="RelatedPartyTransactionsDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_EnvironmentalRemediationDisclosureAbstract" name="EnvironmentalRemediationDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_QuarterlyFinancialDataDisclosureAbstract" name="QuarterlyFinancialDataDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_AcquisitionsAndDispositionsDisclosureAbstract" name="AcquisitionsAndDispositionsDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfCalculationOfNumeratorAndDenominatorInEarningsPerShareTableTextBlock" name="ScheduleOfCalculationOfNumeratorAndDenominatorInEarningsPerShareTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_IncreaseDecreaseInShortTermInventories" name="IncreaseDecreaseInShortTermInventories" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_SummaryOfSignificantAccountingPoliciesDisclosureAbstract" name="SummaryOfSignificantAccountingPoliciesDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_GeneralPartnerDistributionLevelOneMember" name="GeneralPartnerDistributionLevelOneMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_GeneralPartnerDistributionLevelTwoMember" name="GeneralPartnerDistributionLevelTwoMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_GeneralPartnerDistributionLevelThreeMember" name="GeneralPartnerDistributionLevelThreeMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AssetRetirementObligationsPolicyTextBlock" name="AssetRetirementObligationsPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_NumeratorForBasicAndDilutedEarningsPerLimitedPartnerUnitAbstract" name="NumeratorForBasicAndDilutedEarningsPerLimitedPartnerUnitAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_IncreaseDecreaseInLongTermInventories" name="IncreaseDecreaseInLongTermInventories" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_NetProceedsFromRepaymentsOfRevolvingCreditFacilities" name="NetProceedsFromRepaymentsOfRevolvingCreditFacilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_PurchasesAndRelatedCostsPolicyTextBlock" name="PurchasesAndRelatedCostsPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_FieldOperatingCostsAndGeneralAndAdministrativeExpensesPolicyTextBlock" name="FieldOperatingCostsAndGeneralAndAdministrativeExpensesPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AccountsReceivableNetDisclosureOfMaximumAgeOfBalancesPastScheduledInvoiceDate" name="AccountsReceivableNetDisclosureOfMaximumAgeOfBalancesPastScheduledInvoiceDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_OtherAssetsPolicyTextBlock" name="OtherAssetsPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_DenominatorForBasicAndDilutedEarningsPerLimitedPartnerUnitAbstract" name="DenominatorForBasicAndDilutedEarningsPerLimitedPartnerUnitAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_EnvironmentalLiabilitiesPolicyTextBlock" name="EnvironmentalLiabilitiesPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_InventoryTableDisclosureTextBlock" name="InventoryTableDisclosureTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfExpectedAmortizationExpenseTableTextBlock" name="ScheduleOfExpectedAmortizationExpenseTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_LiabilitiesForOutstandingChecks" name="LiabilitiesForOutstandingChecks" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_StorageAndTerminalFacilitiesMember" name="StorageAndTerminalFacilitiesMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_LandAndOtherMember" name="LandAndOtherMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ChangeInAccountingEstimateOfDepreciableLivesEstimatedDepreciationExpenseReduction" name="ChangeInAccountingEstimateOfDepreciableLivesEstimatedDepreciationExpenseReduction" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_ChangeInAccountingEstimateOfDepreciableLivesEstimatedIncreaseInEarningsPerUnit" name="ChangeInAccountingEstimateOfDepreciableLivesEstimatedIncreaseInEarningsPerUnit" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_FrontierPipelineCompanyMember" name="FrontierPipelineCompanyMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SettoonTowingMember" name="SettoonTowingMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ButtePipelineCompanyMember" name="ButtePipelineCompanyMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_WhiteCliffsPipelineLlcMember" name="WhiteCliffsPipelineLlcMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_MaximumMaturityOfCashEquivalentInvestmentsPeriod" name="MaximumMaturityOfCashEquivalentInvestmentsPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_RainbowPipelineCompanyMember" name="RainbowPipelineCompanyMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PAANaturalGasStorageMember" name="PAANaturalGasStorageMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_OtherAssetsMiscellaneousNoncurrent" name="OtherAssetsMiscellaneousNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_AccumulatedAmortizationOfOtherAssetsNoncurrent" name="AccumulatedAmortizationOfOtherAssetsNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_AmortizationExpenseOnOtherAssetsNoncurrent" name="AmortizationExpenseOnOtherAssetsNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_EmissionReductionCreditsMember" name="EmissionReductionCreditsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PropertyTaxAbatementMember" name="PropertyTaxAbatementMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_OtherAssetsNoncurrentGross" name="OtherAssetsNoncurrentGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_NetIncomeLossAfterIncentiveDistribution" name="NetIncomeLossAfterIncentiveDistribution" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_GeneralPartnerOwnershipInterestInNetIncomeLossAfterIncentiveDistribution" name="GeneralPartnerOwnershipInterestInNetIncomeLossAfterIncentiveDistribution" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_AdjustmentForTwoClassMethodForMLP" name="AdjustmentForTwoClassMethodForMLP" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_NetIncomeLossAvailableToLimitedPartnersAfterAdjustmentForTwoClassMethodForMLP" name="NetIncomeLossAvailableToLimitedPartnersAfterAdjustmentForTwoClassMethodForMLP" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_GeneralPartnerOwnershipInterestInSubsidiary" name="GeneralPartnerOwnershipInterestInSubsidiary" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_MaximumInterestHeldByPrincipalOwners" name="MaximumInterestHeldByPrincipalOwners" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_MinimumInterestHeldByPrincipalOwners" name="MinimumInterestHeldByPrincipalOwners" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_NumberOfPrincipalOwners" name="NumberOfPrincipalOwners" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="false" id="paa_RangeOfInterestHeldByPrincipalOwners" name="RangeOfInterestHeldByPrincipalOwners" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NetShortSpreadPositionOnAnticipatedCrudeOilLeaseGatheringPurchaseContractsMember" name="NetShortSpreadPositionOnAnticipatedCrudeOilLeaseGatheringPurchaseContractsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTextBlock" name="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_StorageCapacityOwnedButNotUsedInOperations" name="StorageCapacityOwnedButNotUsedInOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_NetLongPositionOnCrudeOilDerivativeContractsMember" name="NetLongPositionOnCrudeOilDerivativeContractsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NaturalGasCallOptionMember" name="NaturalGasCallOptionMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NetShortSpreadPositionOfCalendarOfCallOptionMember" name="NetShortSpreadPositionOfCalendarOfCallOptionMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_CrudeOilBasisDifferentialHedgesMember" name="CrudeOilBasisDifferentialHedgesMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_CrudeOilFuturesAndSwapsMember" name="CrudeOilFuturesAndSwapsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_CrudeOilFuturesAndSwapsLongPutOptionMember" name="CrudeOilFuturesAndSwapsLongPutOptionMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_CrudeOilFuturesAndSwapsLongCallOptionMember" name="CrudeOilFuturesAndSwapsLongCallOptionMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NetLongPositionOnNaturalGasFuturesContractsMember" name="NetLongPositionOnNaturalGasFuturesContractsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ForeignExchangeForwardContractAtTheRateCAD1.01ToUSD1.00MaturingIn2011Member" name="ForeignExchangeForwardContractAtTheRateCAD1.01ToUSD1.00MaturingIn2011Member" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ForeignExchangeForwardContractAtTheRateCAD1.01ToUSD1.00MaturingIn2012Member" name="ForeignExchangeForwardContractAtTheRateCAD1.01ToUSD1.00MaturingIn2012Member" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ForeignExchangeForwardContractAtTheRateCAD1.00ToUSD1.00MaturingIn2013Member" name="ForeignExchangeForwardContractAtTheRateCAD1.00ToUSD1.00MaturingIn2013Member" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ForeignExchangeForwardContractAtTheRateCAD0.00ToUSD1.00MaturingIn2014Member" name="ForeignExchangeForwardContractAtTheRateCAD0.00ToUSD1.00MaturingIn2014Member" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NonmonetaryNotionalAmountOfPriceRiskDerivativesAveragePerDay" name="NonmonetaryNotionalAmountOfPriceRiskDerivativesAveragePerDay" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_NonmonetaryNotionalAmountOfPriceRiskDerivativesHedgedToManageTheRiskOfNotUtilising" name="NonmonetaryNotionalAmountOfPriceRiskDerivativesHedgedToManageTheRiskOfNotUtilising" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_CrudeOilDerivativeForAnticipatedSaleOfForeignCrudeVolume" name="CrudeOilDerivativeForAnticipatedSaleOfForeignCrudeVolume" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_AdditionalAverageSpreadOverLIBORPercentage" name="AdditionalAverageSpreadOverLIBORPercentage" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_GainLossOnForeignCurrencyCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncome" name="GainLossOnForeignCurrencyCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_GainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncome" name="GainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_NumberOfInterestRateSwapsThatTerminateInTwoYears" name="NumberOfInterestRateSwapsThatTerminateInTwoYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_NumberOfInterestRateSwapsThatTerminateInOneYear" name="NumberOfInterestRateSwapsThatTerminateInOneYear" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_SalesAndRelatedRevenuesMember" name="SalesAndRelatedRevenuesMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PipelineTariffActivitiesTruckingAndRelatedRevenuesMember" name="PipelineTariffActivitiesTruckingAndRelatedRevenuesMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_StorageTerminallingProcessingAndRelatedRevenuesMember" name="StorageTerminallingProcessingAndRelatedRevenuesMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PurchasesAndRelatedCostsMember" name="PurchasesAndRelatedCostsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_FieldOperatingSegmentMember" name="FieldOperatingSegmentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_OtherCurrentAssetsMember" name="OtherCurrentAssetsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_OtherCurrentLiabilitiesMember" name="OtherCurrentLiabilitiesMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_OtherLongTermAssetsMember" name="OtherLongTermAssetsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_OtherLongTermLiabilitiesMember" name="OtherLongTermLiabilitiesMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" name="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_DerivativeFairValueOfDerivativeNetAssetLiability" name="DerivativeFairValueOfDerivativeNetAssetLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="paa_UnrealizedGainsAndLossesRelatingToLevel3DerivativesAbstract" name="UnrealizedGainsAndLossesRelatingToLevel3DerivativesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeNetAssetLiabilityGainLossIncludedInEarningsPeriodIncreaseDecrease" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeNetAssetLiabilityGainLossIncludedInEarningsPeriodIncreaseDecrease" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfRevenuesFromExternalCustomersByGeographicalAreasTableTextBlock" name="ScheduleOfRevenuesFromExternalCustomersByGeographicalAreasTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfLongLivedAssetsByGeographicalAreasTableTextBlock" name="ScheduleOfLongLivedAssetsByGeographicalAreasTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SegmentPipelineTariffActivitiesTruckingMember" name="SegmentPipelineTariffActivitiesTruckingMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SegmentStorageTerminallingProcessingMember" name="SegmentStorageTerminallingProcessingMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SegmentSalesAndLogisticsMember" name="SegmentSalesAndLogisticsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_CapitalExpenditure" name="CapitalExpenditure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_MaintenanceCapital" name="MaintenanceCapital" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_CondensedConsolidatingBalanceSheetLineItems" name="CondensedConsolidatingBalanceSheetLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_CondensedConsolidatingStatementsOfOperationsLineItems" name="CondensedConsolidatingStatementsOfOperationsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NetOperatingRevenue" name="NetOperatingRevenue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_CondensedConsolidatingStatementsOfCashFlowsLineItems" name="CondensedConsolidatingStatementsOfCashFlowsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NoncashItemsAdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesOther" name="NoncashItemsAdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesOther" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" name="ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" name="RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_LongLivedAssets" name="LongLivedAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="paa_InventoryTable" name="InventoryTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_CrudeOilMember" name="CrudeOilMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_LPGMember" name="LPGMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_RefinedProductsMember" name="RefinedProductsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NaturalGasMember" name="NaturalGasMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PartsAndSuppliesMember" name="PartsAndSuppliesMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_InventoryLineItems" name="InventoryLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_InventoryRelatedDisclosuresAbstract" name="InventoryRelatedDisclosuresAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ProceedsFromSaleOfLinefill" name="ProceedsFromSaleOfLinefill" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_InventoryByCategoryAbstract" name="InventoryByCategoryAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_InventoryCurrentAndNoncurrent" name="InventoryCurrentAndNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_InventoryVolumesInBarrels" name="InventoryVolumesInBarrels" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionInventoryVolumes" name="BusinessAcquisitionInventoryVolumes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionPipelinesCapacityAcquired" name="BusinessAcquisitionPipelinesCapacityAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_InventoryVolumesInCubicFeet" name="InventoryVolumesInCubicFeet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_InventoryWeightedAveragePricePerUnitCurrent" name="InventoryWeightedAveragePricePerUnitCurrent" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_InventoryWeightedAveragePricePerUnitLinefillAndBaseGas" name="InventoryWeightedAveragePricePerUnitLinefillAndBaseGas" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_InventoryWeightedAveragePricePerUnitNoncurrent" name="InventoryWeightedAveragePricePerUnitNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_InventoryWeightedAveragePricePerUnit" name="InventoryWeightedAveragePricePerUnit" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_InventoryVolumesNoncurrent" name="InventoryVolumesNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_InventoryVolumesLinefillAndBaseGas" name="InventoryVolumesLinefillAndBaseGas" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_InventoryVolumesCurrent" name="InventoryVolumesCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_RatioForConversionOfNaturalGasVolumeToBarrels" name="RatioForConversionOfNaturalGasVolumeToBarrels" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ConversionNaturalGasToCrudeBarrelsDivisor" name="ConversionNaturalGasToCrudeBarrelsDivisor" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_VulcanEnergyCorporationMember" name="VulcanEnergyCorporationMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PAAVulcanGasStorageMember" name="PAAVulcanGasStorageMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_LynxHoldingsILLCMember" name="LynxHoldingsILLCMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_BluewaterNaturalGasStorageMember" name="BluewaterNaturalGasStorageMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_VulcanGasStorageMember" name="VulcanGasStorageMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PaaNaturalGasStorageAfterIpoMember" name="PaaNaturalGasStorageAfterIpoMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PNGOmnibusAgreementMember" name="PNGOmnibusAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_CostsReimbursedToGeneralPartner" name="CostsReimbursedToGeneralPartner" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_RelatedPartyOwnershipInterestInGeneralPartnerPercentageSold" name="RelatedPartyOwnershipInterestInGeneralPartnerPercentageSold" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfFairValueOfAssetsLiabilitiesBusinessAcquisitionTextBlock" name="ScheduleOfFairValueOfAssetsLiabilitiesBusinessAcquisitionTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfPurchasePriceAllocationTableTextBlock" name="ScheduleOfPurchasePriceAllocationTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AcquisitionsIn2009Member" name="AcquisitionsIn2009Member" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AcquisitionsIn2010Member" name="AcquisitionsIn2010Member" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_Other2010AcquisitionsMember" name="Other2010AcquisitionsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_RobinsonLakePipelineMember" name="RobinsonLakePipelineMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_LeaseGatheringBusinessMember" name="LeaseGatheringBusinessMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NexenAcquisitionMember" name="NexenAcquisitionMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_Other2009AcquisitionsMember" name="Other2009AcquisitionsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_CaplineAndAssociatedTankageMember" name="CaplineAndAssociatedTankageMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AcquisitionsIn2008Member" name="AcquisitionsIn2008Member" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_Other2008AcquisitionsMember" name="Other2008AcquisitionsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AcquisitionsIn2007Member" name="AcquisitionsIn2007Member" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_CommercialRefinedProductsSupplyAndMarketingBusinessMember" name="CommercialRefinedProductsSupplyAndMarketingBusinessMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_TruckingBusinessMember" name="TruckingBusinessMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_BumsteadLPGStorageFacilityMember" name="BumsteadLPGStorageFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_TirzahLPGStorageFacilityAndOtherAssetsMember" name="TirzahLPGStorageFacilityAndOtherAssetsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NumberOfInstallmentsToPayBusinessAcquisitionContingentConsideration" name="NumberOfInstallmentsToPayBusinessAcquisitionContingentConsideration" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_BusinessAcquisitionContingentConsiderationPotentialCashPaymentInEachInstallment" name="BusinessAcquisitionContingentConsiderationPotentialCashPaymentInEachInstallment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_NumberOfNaturalGasStorageFacilities" name="NumberOfNaturalGasStorageFacilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_VolumeOfGasStorageCapacity" name="VolumeOfGasStorageCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_VolumeOfInjectionCapacity" name="VolumeOfInjectionCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_VolumeOfWithdrawlCapacity" name="VolumeOfWithdrawlCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_AggregateWorkingGasStorageCapacity" name="AggregateWorkingGasStorageCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_AggregatePeakInjectionCapacity" name="AggregatePeakInjectionCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_AggregatePeakWithdrawalCapacityPerDay" name="AggregatePeakWithdrawalCapacityPerDay" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_StorageCapacityUnderLease" name="StorageCapacityUnderLease" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_PipelineTransportationCapacitySecuredFromThirdParties" name="PipelineTransportationCapacitySecuredFromThirdParties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionPurchasePricePortionPaidAtClosing" name="BusinessAcquisitionPurchasePricePortionPaidAtClosing" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_DiscountRateUsedForCalculatingPresentValueOfDeferredContingentCashConsideration" name="DiscountRateUsedForCalculatingPresentValueOfDeferredContingentCashConsideration" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionCandadianDollarsToUnitedStatesDollarForeignCurrencyExchangeRateOnAcquisitionDate" name="BusinessAcquisitionCandadianDollarsToUnitedStatesDollarForeignCurrencyExchangeRateOnAcquisitionDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionMainlineCrudeOilPipelinesAcquired" name="BusinessAcquisitionMainlineCrudeOilPipelinesAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionGatheringPipelinesAcquired" name="BusinessAcquisitionGatheringPipelinesAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionDiameterOfPipelinesAcquired" name="BusinessAcquisitionDiameterOfPipelinesAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionNumberOfTruckTerminalsAcquired" name="BusinessAcquisitionNumberOfTruckTerminalsAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionTankageAcquired" name="BusinessAcquisitionTankageAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionCrudeOilLinefillAcquired" name="BusinessAcquisitionCrudeOilLinefillAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionSystemThroughputCapacityAcquired" name="BusinessAcquisitionSystemThroughputCapacityAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionFairValueAllocationBaseGas" name="BusinessAcquisitionFairValueAllocationBaseGas" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionPurchasePriceAllocationWorkingCapitalAndOtherLongTermAssetsAndLiabilities" name="BusinessAcquisitionPurchasePriceAllocationWorkingCapitalAndOtherLongTermAssetsAndLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionFairValueAllocationWorkingCapitalAndOtherLongTermAssetsAndLiabilities" name="BusinessAcquisitionFairValueAllocationWorkingCapitalAndOtherLongTermAssetsAndLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionPurchasePriceAllocationCrudeOilPipelineLinefill" name="BusinessAcquisitionPurchasePriceAllocationCrudeOilPipelineLinefill" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="paa_AcquisitionsAbstract" name="AcquisitionsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_DispositionsAbstract" name="DispositionsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_BusinessAcquisitionPurchasePriceAllocationFutureIncomeTaxLiability" name="BusinessAcquisitionPurchasePriceAllocationFutureIncomeTaxLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionPurchasePriceAllocationEnvironmentalLiabilities" name="BusinessAcquisitionPurchasePriceAllocationEnvironmentalLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_AnnualizedDistributionLevelOne" name="AnnualizedDistributionLevelOne" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AnnualizedDistributionLevelTwo" name="AnnualizedDistributionLevelTwo" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AnnualizedDistributionLevelThree" name="AnnualizedDistributionLevelThree" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AnnualizedDistributionLevelFour" name="AnnualizedDistributionLevelFour" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_DistributionThresholdForParticipationInDistributions" name="DistributionThresholdForParticipationInDistributions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_MaximumPercentageParticipationForDistributionInExcessOfThreshold" name="MaximumPercentageParticipationForDistributionInExcessOfThreshold" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_OtherConsolidatedEquityCompensationInformationAbstract" name="OtherConsolidatedEquityCompensationInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_RelatedPartyTransactionAnnualAdministrativeServicesFee" name="RelatedPartyTransactionAnnualAdministrativeServicesFee" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_RelatedPartyTransactionTransitionServicesAndAssistanceFee" name="RelatedPartyTransactionTransitionServicesAndAssistanceFee" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_RelatedPartyTransactionAnnualAdminstrativeServicesFeeSuccessiveRenewalPeriodInYears" name="RelatedPartyTransactionAnnualAdminstrativeServicesFeeSuccessiveRenewalPeriodInYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_RelatedPartyTransactionAnnualAdminstrativeServicesFeeEffectiveStartDate" name="RelatedPartyTransactionAnnualAdminstrativeServicesFeeEffectiveStartDate" nillable="true" substitutionGroup="xbrli:item" type="us-types:dateStringItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_RelatedPartyTransactionAnnualAdminstrativeServicesFeeEffectiveTerminationDate" name="RelatedPartyTransactionAnnualAdminstrativeServicesFeeEffectiveTerminationDate" nillable="true" substitutionGroup="xbrli:item" type="us-types:dateStringItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_RelatedPartyTransactionPurchasePriceOfAcquiredEntity" name="RelatedPartyTransactionPurchasePriceOfAcquiredEntity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_RelatedPartyTransactionInitialCashInvestmentInAcquiredEntity" name="RelatedPartyTransactionInitialCashInvestmentInAcquiredEntity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_RelatedPartyTransactionCreditFacilityEnteredUponAcquisition" name="RelatedPartyTransactionCreditFacilityEnteredUponAcquisition" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_PercentageOfOwnershipInEntityRelatedParty" name="PercentageOfOwnershipInEntityRelatedParty" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_RelatedPartyTransactionNetContributions" name="RelatedPartyTransactionNetContributions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_GoodwillPurchaseAccountingAdjustments" name="GoodwillPurchaseAccountingAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_GoodwillTranslationAdjustments" name="GoodwillTranslationAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_EmployeesAndDirectorsLongTermIncentivePlanMember" name="EmployeesAndDirectorsLongTermIncentivePlanMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AnnualizedVestingDistributionAmountDollars3.20Member" name="AnnualizedVestingDistributionAmountDollars3.20Member" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_RangeOfAnnualizedVestingDistributionAmountDollarsFrom1.55ToDollars1.90Member" name="RangeOfAnnualizedVestingDistributionAmountDollarsFrom1.55ToDollars1.90Member" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AnnualizedVestingDistributionOtherRangeMember" name="AnnualizedVestingDistributionOtherRangeMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_RangeOfAnnualizedVestingDistributionAmountDollarsFrom3.50ToDollars4.45Member" name="RangeOfAnnualizedVestingDistributionAmountDollarsFrom3.50ToDollars4.45Member" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_RangeOfAnnualizedVestingDistributionAmountDollarsFrom3.50ToDollars4.25Member" name="RangeOfAnnualizedVestingDistributionAmountDollarsFrom3.50ToDollars4.25Member" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NonOfficerEmployeeLongTermIncentiveTrackingUnitPlanMember" name="NonOfficerEmployeeLongTermIncentiveTrackingUnitPlanMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_LongTermIncentivePlansMember" name="LongTermIncentivePlansMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PNGLongTermIncentivePlansMember" name="PNGLongTermIncentivePlansMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PNGLongTermIncentivePlanAwardsIncludingTransactionGrantsMember" name="PNGLongTermIncentivePlanAwardsIncludingTransactionGrantsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PNGTransactionGrantsMember" name="PNGTransactionGrantsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_EquityBasedCompensationPlanClassBUnitsOfPlainsAAPLPMember" name="EquityBasedCompensationPlanClassBUnitsOfPlainsAAPLPMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PNGClassBUnitsMember" name="PNGClassBUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_ShareBasedCompensationSharesOutstandingUnderEquityCompensationPlansByAnnualizedVestingDistributionRangeAxis" name="ShareBasedCompensationSharesOutstandingUnderEquityCompensationPlansByAnnualizedVestingDistributionRangeAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationSharesOutstandingUnderEquityCompensationPlansByAnnualizedVestingDistributionRangeDomain" name="ShareBasedCompensationSharesOutstandingUnderEquityCompensationPlansByAnnualizedVestingDistributionRangeDomain" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearOne" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearOne" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearTwo" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearTwo" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationSharesAuthorizedUnderEquityCompensationPlansByAnnualizedDistributionLowerRangeLimit" name="ShareBasedCompensationSharesAuthorizedUnderEquityCompensationPlansByAnnualizedDistributionLowerRangeLimit" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationSharesAuthorizedUnderEquityCompensationPlansByAnnualizedDistributionUpperRangeLimit" name="ShareBasedCompensationSharesAuthorizedUnderEquityCompensationPlansByAnnualizedDistributionUpperRangeLimit" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationSharesAuthorizedUnderEquityCompensationPlansTimeForVesting" name="ShareBasedCompensationSharesAuthorizedUnderEquityCompensationPlansTimeForVesting" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationSharesAuthorizedUnderEquityCompensationPlansByAnnualizedDistribution" name="ShareBasedCompensationSharesAuthorizedUnderEquityCompensationPlansByAnnualizedDistribution" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearThree" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearThree" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearFour" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearFour" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearFive" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearFive" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestGrantsInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestGrantsInPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIncludingDistributionEquivalentRightsNonvestedNumber" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIncludingDistributionEquivalentRightsNonvestedNumber" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIncludingDistributionEquivalentRightsEarnedNumber" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIncludingDistributionEquivalentRightsEarnedNumber" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationByShareBasedPaymentAwardPerformanceBasedUnitsProbableAnnualizedDistributionLevel" name="ShareBasedCompensationByShareBasedPaymentAwardPerformanceBasedUnitsProbableAnnualizedDistributionLevel" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_PNGTransactionGrantsAbstract" name="PNGTransactionGrantsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAcquiredInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAcquiredInPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAcquiredInPeriodWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAcquiredInPeriodWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_DistributionEquivalentRightsCashPayments" name="DistributionEquivalentRightsCashPayments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_EquityBasedCompensationExpenseIncrementalDueToModifications" name="EquityBasedCompensationExpenseIncrementalDueToModifications" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_AllocatedShareBasedCompensationExpenseDetail" name="AllocatedShareBasedCompensationExpenseDetail" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriodSettledInCash" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriodSettledInCash" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_EquityBasedCompensationFairValueFutureAmortizationAbstract" name="EquityBasedCompensationFairValueFutureAmortizationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearOne" name="EquityBasedCompensationFairValueFutureAmortizationExpenseYearOne" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearTwo" name="EquityBasedCompensationFairValueFutureAmortizationExpenseYearTwo" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearThree" name="EquityBasedCompensationFairValueFutureAmortizationExpenseYearThree" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearFour" name="EquityBasedCompensationFairValueFutureAmortizationExpenseYearFour" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnitsEarnedOutstanding" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnitsEarnedOutstanding" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearFive" name="EquityBasedCompensationFairValueFutureAmortizationExpenseYearFive" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_EquityBasedCompensationFairValueFutureAmortizationExpense" name="EquityBasedCompensationFairValueFutureAmortizationExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_GrantDateFairValueOfOutstandingClassBUnitsRollForward" name="GrantDateFairValueOfOutstandingClassBUnitsRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_ClassBActivityRollForward" name="ClassBActivityRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_OutstandingUnitsRollForward" name="OutstandingUnitsRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReservedForFutureGrantsOutstanding" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReservedForFutureGrantsOutstanding" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_PaymentsForWithholdingTaxes" name="PaymentsForWithholdingTaxes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_OutstandingUnitsEarnedRollForward" name="OutstandingUnitsEarnedRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfPerUnitCashDistributionsAndExcessOverMinimumQuarterlyDistributionsTextBlock" name="ScheduleOfPerUnitCashDistributionsAndExcessOverMinimumQuarterlyDistributionsTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfReductionInIncentiveDistributionsOnAcquisitionsTableTextBlock" name="ScheduleOfReductionInIncentiveDistributionsOnAcquisitionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfCashDistributionsMadeTextBlock" name="ScheduleOfCashDistributionsMadeTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfCapitalUnitsIssuedDuringPeriodTableTextBlock" name="ScheduleOfCapitalUnitsIssuedDuringPeriodTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PercentageDistributionOfAvailableCash" name="PercentageDistributionOfAvailableCash" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NumberOfDaysRequiredForDistributionToUnitholdersAfterEndOfQuarter" name="NumberOfDaysRequiredForDistributionToUnitholdersAfterEndOfQuarter" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_PartnersCapitalAndDistributionsTable" name="PartnersCapitalAndDistributionsTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_DistributionsAndExcessOverMinimumQuarterlyDistributionsAxis" name="DistributionsAndExcessOverMinimumQuarterlyDistributionsAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_DistributionsAndExcessOverMinimumQuarterlyDistributionDomain" name="DistributionsAndExcessOverMinimumQuarterlyDistributionDomain" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PacificEnergyPartnersLPMember" name="PacificEnergyPartnersLPMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_PartnersCapitalAndDistributionLineItems" name="PartnersCapitalAndDistributionLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ModificationOfHoldingsUnitsModified" name="ModificationOfHoldingsUnitsModified" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_LineOfCreditFacilityEBITDAToInterestCoverageRatioMinimum" name="LineOfCreditFacilityEBITDAToInterestCoverageRatioMinimum" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ModificationOfHoldingsUnitsPostModification" name="ModificationOfHoldingsUnitsPostModification" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_NumberOfPotentialConversionTranchesBeforeAmendedAndRestatedAgreement" name="NumberOfPotentialConversionTranchesBeforeAmendedAndRestatedAgreement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NumberOfPotentialConversionTranchesAfterAmendedAndRestatedAgreement" name="NumberOfPotentialConversionTranchesAfterAmendedAndRestatedAgreement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ConversionOfStockPortionOfUnitsModified" name="ConversionOfStockPortionOfUnitsModified" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ConstructionOfPipelineCompleted" name="ConstructionOfPipelineCompleted" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_GeneralPartnerDistributionRate" name="GeneralPartnerDistributionRate" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_GeneralPartnerIncentiveDistributionThreshold" name="GeneralPartnerIncentiveDistributionThreshold" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_DistributionMadeToMemberOrLimitedPartnerPerUnitOverMinimumDistributionLevel" name="DistributionMadeToMemberOrLimitedPartnerPerUnitOverMinimumDistributionLevel" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_ReductionInIncentiveDistributionsAbstract" name="ReductionInIncentiveDistributionsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ReductionInIncentiveDistrbutions" name="ReductionInIncentiveDistrbutions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_ReductionInFutureIncentiveDistributionsInNextTwelveMonths" name="ReductionInFutureIncentiveDistributionsInNextTwelveMonths" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_ReductionInAllIncentiveDistributions" name="ReductionInAllIncentiveDistributions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_AggregateRemainingIncentiveDistributionReductions" name="AggregateRemainingIncentiveDistributionReductions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_CashDistributionsMadeToGeneralPartnerOwnershipInterest" name="CashDistributionsMadeToGeneralPartnerOwnershipInterest" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_SubsequentDistributionPerLimitedPartnerUnitOutstanding" name="SubsequentDistributionPerLimitedPartnerUnitOutstanding" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SubsequentDistributionDateOfDistribution" name="SubsequentDistributionDateOfDistribution" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AllOwnershipInterestsSubsequentDistributionAmount" name="AllOwnershipInterestsSubsequentDistributionAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_GeneralPartnerOwnershipInterestSubsequentDistrbutionAmount" name="GeneralPartnerOwnershipInterestSubsequentDistrbutionAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_GeneralPartnerIncentiveDistributionSubsquentDistributionAmount" name="GeneralPartnerIncentiveDistributionSubsquentDistributionAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_PeriodForReductionOfIncentive" name="PeriodForReductionOfIncentive" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ReductionInIncentiveDistributionsPerQuarterForFirstYear" name="ReductionInIncentiveDistributionsPerQuarterForFirstYear" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_ReductionInIncentiveDistributionsPerQuarterForSecondYear" name="ReductionInIncentiveDistributionsPerQuarterForSecondYear" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_SLCPipelineLLCMember" name="SLCPipelineLLCMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PartnersCapitalCashContributionMadeByCoVenturer" name="PartnersCapitalCashContributionMadeByCoVenturer" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_PartnersCapitalAccountLossOnFormationOfJointVenture" name="PartnersCapitalAccountLossOnFormationOfJointVenture" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_LimitedPartnersUnitPricePerUnit" name="LimitedPartnersUnitPricePerUnit" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PartnersCapitalAccountGeneralPartnerContribution" name="PartnersCapitalAccountGeneralPartnerContribution" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_ForeignPeriodTaxOnBookVersusTaxDifferences" name="ForeignPeriodTaxOnBookVersusTaxDifferences" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_ForeignPeriodTaxOnPermanentBookVersusTaxDifferences" name="ForeignPeriodTaxOnPermanentBookVersusTaxDifferences" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_ForeignDeferredTaxExpensesBenefitOnBookVersusTaxDifferences" name="ForeignDeferredTaxExpensesBenefitOnBookVersusTaxDifferences" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_ForeignFlowThroughEntitiesDeferredTaxExpensesBenefitOnBookVersusTaxDifferences" name="ForeignFlowThroughEntitiesDeferredTaxExpensesBenefitOnBookVersusTaxDifferences" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_ForeignIncomeTaxExpenseBenefitAtForeignStatutoryRate" name="ForeignIncomeTaxExpenseBenefitAtForeignStatutoryRate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_TexasNewMexicoMember" name="TexasNewMexicoMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShellOilProductsAssetAcquisitionMember" name="ShellOilProductsAssetAcquisitionMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_EnvironmentalRemediationCostsForAcquisitionsSellingCompanyResponsibility" name="EnvironmentalRemediationCostsForAcquisitionsSellingCompanyResponsibility" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_RemediationCostsIncurredSinceBusinessAcquired" name="RemediationCostsIncurredSinceBusinessAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_EnvironmentalRemediationCostsBusinessSellerShare" name="EnvironmentalRemediationCostsBusinessSellerShare" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_PremiumPerSiteForEnvironmentalInsurancePolicy" name="PremiumPerSiteForEnvironmentalInsurancePolicy" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_EnvironmentalInsurancePolicyTakenByThirdPartyAggregateCoverageLimit" name="EnvironmentalInsurancePolicyTakenByThirdPartyAggregateCoverageLimit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_EnvironmentalInsurancePolicyExpirationDate" name="EnvironmentalInsurancePolicyExpirationDate" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_MarathonPetroleumCompanyLLCMember" name="MarathonPetroleumCompanyLLCMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ValeroMarketingAndSupplyCompanyMember" name="ValeroMarketingAndSupplyCompanyMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ConocophillipsCompanyMember" name="ConocophillipsCompanyMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SouthernDistrictOfTexasPipelineReleasesMember" name="SouthernDistrictOfTexasPipelineReleasesMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SemCrudeLPMember" name="SemCrudeLPMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PacificPipelineSystemLLCMember" name="PacificPipelineSystemLLCMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PacificAtlanticTerminalsLLCMember" name="PacificAtlanticTerminalsLLCMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_RockyMountainPipelinesSystemLlcMember" name="RockyMountainPipelinesSystemLlcMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NumberOfSmallerCrudeOilReleases" name="NumberOfSmallerCrudeOilReleases" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NumberOfStateCourtActionsConsolidatedIntoOne" name="NumberOfStateCourtActionsConsolidatedIntoOne" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NumberOfCourtActionsInFederalCourt" name="NumberOfCourtActionsInFederalCourt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_EstimatedPotentialCostOfEnvironmentalRemediation" name="EstimatedPotentialCostOfEnvironmentalRemediation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_NaturalResourcesContaminationDamagesSettledButAllocationDisputed" name="NaturalResourcesContaminationDamagesSettledButAllocationDisputed" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_EPARequestForInformationNumberOfTruckTerminals" name="EPARequestForInformationNumberOfTruckTerminals" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_EnvironmentalRemediationCashExpendituresPeriodInYearsLowEndOfRange" name="EnvironmentalRemediationCashExpendituresPeriodInYearsLowEndOfRange" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_EnvironmentalRemediationCashExpendituresPeriodInYearsHighEndOfRange" name="EnvironmentalRemediationCashExpendituresPeriodInYearsHighEndOfRange" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfDerivativeInstrumentsEffectOnOtherComprehensiveIncomeLossTableTextBlock" name="ScheduleOfDerivativeInstrumentsEffectOnOtherComprehensiveIncomeLossTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_OtherNonoperatingIncomeExpenseMember" name="OtherNonoperatingIncomeExpenseMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeNetAssetLiabilityValue" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeNetAssetLiabilityValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeNetAssetLiabilityGainLossIncludedInEarnings" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeNetAssetLiabilityGainLossIncludedInEarnings" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeNetAssetLiabilityGainLossIncludedInOtherComprehensiveIncome" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeNetAssetLiabilityGainLossIncludedInOtherComprehensiveIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeNetAssetLiabilityPurchasesSalesIssuancesSettlements" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeNetAssetLiabilityPurchasesSalesIssuancesSettlements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" name="ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorSecuredHedgedInventoryDebtFacilityMember" name="SeniorSecuredHedgedInventoryDebtFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_FixedRateSeniorNotesMember" name="FixedRateSeniorNotesMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PNGSeniorUnsecuredRevovlingCreditFacilityMember" name="PNGSeniorUnsecuredRevovlingCreditFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInAugust2009At4.75PercentMember" name="SeniorNotesDueInAugust2009At4.75PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ThreeHundredSixtyFourDaySeniorUnsecuredCreditFacilityMember" name="ThreeHundredSixtyFourDaySeniorUnsecuredCreditFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInSeptember2012At4.25PercentMember" name="SeniorNotesDueInSeptember2012At4.25PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInOctober2012At7.75PercentMember" name="SeniorNotesDueInOctober2012At7.75PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInDecember2013At5.63PercentMember" name="SeniorNotesDueInDecember2013At5.63PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInJune2014At7.13PercentMember" name="SeniorNotesDueInJune2014At7.13PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInJune2015At5.25PercentMember" name="SeniorNotesDueInJune2015At5.25PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInSeptember2015At6.25PercentMember" name="SeniorNotesDueInSeptember2015At6.25PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInAugust2016At5.88PercentMember" name="SeniorNotesDueInAugust2016At5.88PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInJanuary2017At6.13PercentMember" name="SeniorNotesDueInJanuary2017At6.13PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInMay2018At6.50PercentMember" name="SeniorNotesDueInMay2018At6.50PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInMay2019At8.75PercentMember" name="SeniorNotesDueInMay2019At8.75PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInJanuary2020At5.75PercentMember" name="SeniorNotesDueInJanuary2020At5.75PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInMay2036At6.70PercentMember" name="SeniorNotesDueInMay2036At6.70PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInJanuary2037At6.65PercentMember" name="SeniorNotesDueInJanuary2037At6.65PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeniorNotesDueInSeptember2015At3.95PercentMember" name="SeniorNotesDueInSeptember2015At3.95PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_OtherNoncurrentLongTermDebt" name="OtherNoncurrentLongTermDebt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_Debt" name="Debt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_SeniorUnsecuredRevolvingCreditFacilityMember" name="SeniorUnsecuredRevolvingCreditFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_CanadianSeniorUnsecuredRevolvingCreditFacilityMember" name="CanadianSeniorUnsecuredRevolvingCreditFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PercentageOfFaceValueAtWhichSeniorNotesAreSold" name="PercentageOfFaceValueAtWhichSeniorNotesAreSold" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_NotionalPrincipalAmountOnWhichInterestSpreadWillBeCalculated" name="NotionalPrincipalAmountOnWhichInterestSpreadWillBeCalculated" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_PeriodOfMaturitiesOfNotionalPrincipalAmountOnWhichInterestSpreadWillBeCalculated" name="PeriodOfMaturitiesOfNotionalPrincipalAmountOnWhichInterestSpreadWillBeCalculated" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AdditionalNotionalPrincipalAmountOnWhichInterestSpreadWillBeCalculated" name="AdditionalNotionalPrincipalAmountOnWhichInterestSpreadWillBeCalculated" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_PeriodOfMaturitiesOfAdditionalNotionalPrincipalAmountOnWhichInterestSpreadWillBeCalculated" name="PeriodOfMaturitiesOfAdditionalNotionalPrincipalAmountOnWhichInterestSpreadWillBeCalculated" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element abstract="false" id="paa_LineOfCreditFacilityDebtToEBITDACoverageRatio" name="LineOfCreditFacilityDebtToEBITDACoverageRatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_LineofCreditFacilityLengthOfAcquisitionPeriod" name="LineofCreditFacilityLengthOfAcquisitionPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_LineOfCreditFacilityDebtToEBITDACoverageRatioDuringAcquisitionPeriod" name="LineOfCreditFacilityDebtToEBITDACoverageRatioDuringAcquisitionPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AmountOfAcquisitionBeyondWhichRequirementOfDebtToEBITDAWillChange" name="AmountOfAcquisitionBeyondWhichRequirementOfDebtToEBITDAWillChange" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_LettersOfCreditOutstandingAmount" name="LettersOfCreditOutstandingAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_LongTermDebtWeightedAverageLife" name="LongTermDebtWeightedAverageLife" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_ScheduleOfDebtInstrumentsShortTermAndLongTermTextBlock" name="ScheduleOfDebtInstrumentsShortTermAndLongTermTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShortTermBorrowingsRepaymentPeriod" name="ShortTermBorrowingsRepaymentPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_DistributionDeclaredToMemberOrLimitedPartnerCashDistributionPerUnit" name="DistributionDeclaredToMemberOrLimitedPartnerCashDistributionPerUnit" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_DistributionPaidToMemberOrLimitedPartnerCashFlowSide" name="DistributionPaidToMemberOrLimitedPartnerCashFlowSide" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_DistributionPaidToGeneralPartnerCashFlowSide" name="DistributionPaidToGeneralPartnerCashFlowSide" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_PaaFinanceCorpMember" name="PaaFinanceCorpMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsParticipationInDistributionsIncrements" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsParticipationInDistributionsIncrements" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsInPercentage" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsInPercentage" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPeriodForIncrementInDistributions" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPeriodForIncrementInDistributions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightsOnFifthAnniversaryOfDateOfGrant" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightsOnFifthAnniversaryOfDateOfGrant" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightsAfterFifthAnniversaryOfDateOfGrant" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightsAfterFifthAnniversaryOfDateOfGrant" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedNetIncome" name="ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedNetIncome" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_EmissionReductionCreditsUtilized" name="EmissionReductionCreditsUtilized" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_RelatedPartyTransactionEnvironmentalIndemnificationsCap" name="RelatedPartyTransactionEnvironmentalIndemnificationsCap" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_RelatedPartyTransactionEnvironmentalIndemnificationsCapTimePeriod" name="RelatedPartyTransactionEnvironmentalIndemnificationsCapTimePeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_RelatedPartyTransactionEnvironmentalRemediationCostsFirstCostsAmountIncurredByRelatedParty" name="RelatedPartyTransactionEnvironmentalRemediationCostsFirstCostsAmountIncurredByRelatedParty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_PNGMember" name="PNGMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeriesASubordinatedUnitsMember" name="SeriesASubordinatedUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SeriesBSubordinatedUnitsMember" name="SeriesBSubordinatedUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_CommonUnitAndSeriesASubordinatedUnitMember" name="CommonUnitAndSeriesASubordinatedUnitMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_ModificationOfHoldingsByTrancheAxis" name="ModificationOfHoldingsByTrancheAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_PerformanceThresholdsAbstract" name="PerformanceThresholdsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SubordinatedUnitsDistributionAvailableThresholdAnnualized" name="SubordinatedUnitsDistributionAvailableThresholdAnnualized" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_MinimumWorkingGasStorageCapacity" name="MinimumWorkingGasStorageCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_SubordinatedUnitsDistributionAvailableThresholdQuarterly" name="SubordinatedUnitsDistributionAvailableThresholdQuarterly" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ConversionOfSubordinatedUnitsNumberOfConsecutiveQuartersOfDistributionRequired" name="ConversionOfSubordinatedUnitsNumberOfConsecutiveQuartersOfDistributionRequired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SubordinatedUnitsDistributionReceivedThresholdAnnualized" name="SubordinatedUnitsDistributionReceivedThresholdAnnualized" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ConversionOfSubordinatedUnitToCommonUnitsTerms" name="ConversionOfSubordinatedUnitToCommonUnitsTerms" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ConversionOfSubordinatedUnitsNumberOfUnitsToBeConverted" name="ConversionOfSubordinatedUnitsNumberOfUnitsToBeConverted" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SubordinatedUnitConversionRatio" name="SubordinatedUnitConversionRatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ConversionOfSubordinatedUnitsNumberOfConsecutiveQuartersOfDistributionSufficiencyRequired" name="ConversionOfSubordinatedUnitsNumberOfConsecutiveQuartersOfDistributionSufficiencyRequired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SubordinatedUnitsDistributionReceivedThresholdQuarterly" name="SubordinatedUnitsDistributionReceivedThresholdQuarterly" nillable="true" substitutionGroup="xbrli:item" type="us-types:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ModificationOfHoldingsByTrancheDomain" name="ModificationOfHoldingsByTrancheDomain" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_TrancheOneMember" name="TrancheOneMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_TrancheTwoMember" name="TrancheTwoMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_TrancheThreeMember" name="TrancheThreeMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_TrancheFourMember" name="TrancheFourMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_TrancheFiveMember" name="TrancheFiveMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_LineOfCreditFacilityTenureOfFacility" name="LineOfCreditFacilityTenureOfFacility" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_SeniorNotesDueInFebruary2021At5.00PercentMember" name="SeniorNotesDueInFebruary2021At5.00PercentMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PriceRiskDerivativeAmountUsedToFundHedgeInventory" name="PriceRiskDerivativeAmountUsedToFundHedgeInventory" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable" name="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisDisclosureItemsAxis" name="FairValueAssetsLiabilitiesMeasuredOnRecurringBasisDisclosureItemsAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisDisclosureItemsDomain" name="FairValueAssetsLiabilitiesMeasuredOnRecurringBasisDisclosureItemsDomain" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_LongTermDebtMaturitiesFairValueHedgeAdjustment" name="LongTermDebtMaturitiesFairValueHedgeAdjustment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_LongTermDebtMaturitiesOtherLongTermObligationsExcluded" name="LongTermDebtMaturitiesOtherLongTermObligationsExcluded" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_StandbyLetterOfCreditIssuancePeriodUpperLimit" name="StandbyLetterOfCreditIssuancePeriodUpperLimit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_GainLossOnSaleOfPropertyPlantEquipmentDescription" name="GainLossOnSaleOfPropertyPlantEquipmentDescription" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_CrudeOilRefinedProductsAndLpgPurchasesAndRelatedCostsBuySellTransactions" name="CrudeOilRefinedProductsAndLpgPurchasesAndRelatedCostsBuySellTransactions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_OtherAssetsNoncurrentCondensedConsolidatingFinancials" name="OtherAssetsNoncurrentCondensedConsolidatingFinancials" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="false" id="paa_TruckingEquipmentAndOtherMember" name="TruckingEquipmentAndOtherMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="false" id="paa_InventoryTypeDomain" name="InventoryTypeDomain" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_GoodwillPolicyTextBlock" name="GoodwillPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_IntangibleAssetsPolicyTextBlock" name="IntangibleAssetsPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_BusinessAcquisitionNumberOfOperationalNaturalGasStorageCavernsAcquired" name="BusinessAcquisitionNumberOfOperationalNaturalGasStorageCavernsAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionNumberOfPermittedNaturalGasStorageCavernsAcquired" name="BusinessAcquisitionNumberOfPermittedNaturalGasStorageCavernsAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionVolumeOfPermittedGasStorageCavernCapacity" name="BusinessAcquisitionVolumeOfPermittedGasStorageCavernCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionNumberOfPipelinesAvailable" name="BusinessAcquisitionNumberOfPipelinesAvailable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_AcquisitionsIn2011Member" name="AcquisitionsIn2011Member" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SouthernPinesAcquisitionMember" name="SouthernPinesAcquisitionMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_BusinessAcquisitionFairValueAssetsLiabiliesAllocationAbstract" name="BusinessAcquisitionFairValueAssetsLiabiliesAllocationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_BusinessAcquisitionFairValueAllocationPropertyPlantAndEquipment" name="BusinessAcquisitionFairValueAllocationPropertyPlantAndEquipment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionFairValueAllocationGoodwillAmount" name="BusinessAcquisitionFairValueAllocationGoodwillAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionFairValueAllocationAmortizableIntangibleAssets" name="BusinessAcquisitionFairValueAllocationAmortizableIntangibleAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionFairValueAllocationAssetsLiabilitiesNet" name="BusinessAcquisitionFairValueAllocationAssetsLiabilitiesNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_AcquisitionPurchasePriceAllocationNoncurrentAssets" name="AcquisitionPurchasePriceAllocationNoncurrentAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionPurchasePriceAllocationInventoryAndOtherWorkingCapital" name="BusinessAcquisitionPurchasePriceAllocationInventoryAndOtherWorkingCapital" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="paa_NumberOfAdditionalBusinessesAcquired" name="NumberOfAdditionalBusinessesAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfBusinessAcquisitionPurchasePriceTextBlock" name="ScheduleOfBusinessAcquisitionPurchasePriceTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ScheduleOfBusinessAcquisitionPurchasePriceAcquisition2TextBlock" name="ScheduleOfBusinessAcquisitionPurchasePriceAcquisition2TextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="false" id="paa_PAANaturalGasStorageAcquisitionMember" name="PAANaturalGasStorageAcquisitionMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_AcquisitionsIn2005Member" name="AcquisitionsIn2005Member" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ECIAcquisitionMember" name="ECIAcquisitionMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SaleOfStockNumberOfSharesIssuedToParentInTransaction" name="SaleOfStockNumberOfSharesIssuedToParentInTransaction" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PaymentsForPurchaseOfPrivatePlacementUnits" name="PaymentsForPurchaseOfPrivatePlacementUnits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_SubsidiaryProceedsFromGeneralPartnerContribution" name="SubsidiaryProceedsFromGeneralPartnerContribution" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_MinorityInterestOther" name="MinorityInterestOther" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIssedNumber" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIssedNumber" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_ForwardStartingInterestRateSwapMember" name="ForwardStartingInterestRateSwapMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ForwardStartingThirtyYearInterestRateSwapMember" name="ForwardStartingThirtyYearInterestRateSwapMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ForwardStartingTenYearInterestRateSwapMember" name="ForwardStartingTenYearInterestRateSwapMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_DerivativeInstrumentsHedgeGainLossRecognizedInEarnings" name="DerivativeInstrumentsHedgeGainLossRecognizedInEarnings" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_DerivativeInstrumentsCashFlowHedgeGainLossRecognizedInIncomeNet" name="DerivativeInstrumentsCashFlowHedgeGainLossRecognizedInIncomeNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_CashFlowHedgeGainLossToBeReclassifiedInYearTwoAndThree" name="CashFlowHedgeGainLossToBeReclassifiedInYearTwoAndThree" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_RelatedPartyOwnershipPercentageInGeneralPartnerPriorToTransaction" name="RelatedPartyOwnershipPercentageInGeneralPartnerPriorToTransaction" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_RelatedPartyOwnershipPercentageInGeneralPartner" name="RelatedPartyOwnershipPercentageInGeneralPartner" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_OccidentalPetroleumCorporationMember" name="OccidentalPetroleumCorporationMember" nillable="true" substitutionGroup="xbrli:item" type="us-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_RelatedPartyOwnershipInterestInGeneralPartnerPercentage" name="RelatedPartyOwnershipInterestInGeneralPartnerPercentage" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SaleOfStockPercentOfEquityIssuedInTransaction" name="SaleOfStockPercentOfEquityIssuedInTransaction" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PurchaseOfStockParentPercentageOfOwnershipInSubsidiaryBeforeOffering" name="PurchaseOfStockParentPercentageOfOwnershipInSubsidiaryBeforeOffering" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_PurchaseOfStockParentPercentageOfOwnershipInSubsidiaryContributedInOffering" name="PurchaseOfStockParentPercentageOfOwnershipInSubsidiaryContributedInOffering" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_SaleOfStockConsiderationReceivedOnTransactionFromParent" name="SaleOfStockConsiderationReceivedOnTransactionFromParent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardForfeitedInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardForfeitedInPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueForfeited" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueForfeited" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEarnedInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEarnedInPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="paa_InventoryAxis" name="InventoryAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_LineOfCreditFacilityRenewalDate" name="LineOfCreditFacilityRenewalDate" nillable="true" substitutionGroup="xbrli:item" type="us-types:dateStringItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_CoIssuerOfDebtOwnershipPercentage" name="CoIssuerOfDebtOwnershipPercentage" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" name="FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" nillable="true" substitutionGroup="xbrli:item" type="us-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_MinorityInterestOwnershipPercentageAcquiredByNoncontrollingOwners" name="MinorityInterestOwnershipPercentageAcquiredByNoncontrollingOwners" nillable="true" substitutionGroup="xbrli:item" type="us-types:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="paa_BusinessAcquisitionFairValueAllocationNoncurrentLiabilitiesLongTermDebt" name="BusinessAcquisitionFairValueAllocationNoncurrentLiabilitiesLongTermDebt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="paa_IPOSaleOfStockNumberofSharesIssuedAtClosing" name="IPOSaleOfStockNumberofSharesIssuedAtClosing" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="paa_InterestExpenseContangoInventoryPurchases" name="InterestExpenseContangoInventoryPurchases" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="paa_DerivativeInstrumentsHedgingRelationshipsGainLossRecognizedInEarningsInterestExpense" name="DerivativeInstrumentsHedgingRelationshipsGainLossRecognizedInEarningsInterestExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
</xsd:schema>
</XBRL>
