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  <xs:element id="paa_InventoryVolumesCurrent" abstract="false" name="InventoryVolumesCurrent" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:volumeItemType"/>
  <xs:element id="paa_LongTermStorageTerminallingAndThroughputAgreementsRevenuesMember" abstract="true" name="LongTermStorageTerminallingAndThroughputAgreementsRevenuesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_AdditionalInterestsInStraddlePlantsMember" abstract="true" name="AdditionalInterestsInStraddlePlantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_LineOfCreditAndCommercialPaperMember" abstract="true" name="LineOfCreditAndCommercialPaperMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_SignificantTransactionRelatedExpenses" abstract="false" name="SignificantTransactionRelatedExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="paa_NetProceedsFromRepaymentsOfHedgedInventoryFacility" abstract="false" name="NetProceedsFromRepaymentsOfHedgedInventoryFacility" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="paa_CrudeOilStorageTerminalAssetsMember" abstract="true" name="CrudeOilStorageTerminalAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" abstract="true" name="OrganizationConsolidationAndPresentationOfFinancialStatementsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="paa_TradeAccountsReceivableNetDisclosureOfMaximumAgeOfBalancesPastInvoiceDate" abstract="false" name="TradeAccountsReceivableNetDisclosureOfMaximumAgeOfBalancesPastInvoiceDate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="paa_ContractWithCustomerContractualRightsOfOffsetWithCounterparties" abstract="false" name="ContractWithCustomerContractualRightsOfOffsetWithCounterparties" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="paa_PropaneContractsRelatedToSubsequentSaleOfProductMember" abstract="true" name="PropaneContractsRelatedToSubsequentSaleOfProductMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_StonepeakInfrastructurePartnersMember" abstract="true" name="StonepeakInfrastructurePartnersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_GOZoneTermLoansMember" abstract="true" name="GOZoneTermLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_PipelineRevenuesSupportedByMinimumVolumeCommitmentsAndLongTermCapacityAgreementsMember" abstract="true" name="PipelineRevenuesSupportedByMinimumVolumeCommitmentsAndLongTermCapacityAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_InventoryWeightedAveragePricePerUnitNoncurrent" abstract="false" name="InventoryWeightedAveragePricePerUnitNoncurrent" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="srt-types:perUnitItemType"/>
  <xs:element id="paa_SeniorUnsecuredRevolvingCreditFacilityMember" abstract="true" name="SeniorUnsecuredRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_RedRiverPipelineCompanyLLCMember" abstract="true" name="RedRiverPipelineCompanyLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_GainsLossesOnAssetSalesAndAssetImpairmentsNetMember" abstract="true" name="GainsLossesOnAssetSalesAndAssetImpairmentsNetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_OryxMidstreamHoldingsLLCMember" abstract="true" name="OryxMidstreamHoldingsLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_LineOfCreditFacilityPeriodForWhichTermOfCreditFacilityMayBeExtended" abstract="false" name="LineOfCreditFacilityPeriodForWhichTermOfCreditFacilityMayBeExtended" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="paa_CrudeOilDerivativeContractsMember" abstract="true" name="CrudeOilDerivativeContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_ScheduleOfDebtInstrumentsTable" abstract="true" name="ScheduleOfDebtInstrumentsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="paa_PartnersCapitalAndDistributionsTable" abstract="true" name="PartnersCapitalAndDistributionsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="paa_SegmentSupplyAndLogisticsMember" abstract="true" name="SegmentSupplyAndLogisticsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_GainsLossesFromDerivativeActivitiesAndInventoryValuationAdjustments" abstract="false" name="GainsLossesFromDerivativeActivitiesAndInventoryValuationAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="paa_SalesAndRelatedRevenuesMember" abstract="true" name="SalesAndRelatedRevenuesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_AOCIOtherIncludingPortionAttributableToNoncontrollingInterestMember" abstract="true" name="AOCIOtherIncludingPortionAttributableToNoncontrollingInterestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_ClassActionLawsuitsMember" abstract="true" name="ClassActionLawsuitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_IndictmentNumberofMisdemeanorChargesGuiltyVerdictStrictLiabilityDischargeCount" abstract="false" name="IndictmentNumberofMisdemeanorChargesGuiltyVerdictStrictLiabilityDischargeCount" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="paa_IndictmentNumberofFelonyDischargesGuiltyVerdict" abstract="false" name="IndictmentNumberofFelonyDischargesGuiltyVerdict" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="paa_OtherDebtMember" abstract="true" name="OtherDebtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_PipelineAndRelatedFacilitiesAndStorageTerminalAndRailFacilitiesMember" abstract="true" name="PipelineAndRelatedFacilitiesAndStorageTerminalAndRailFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_CounterpartyDeficienciesUnbilledAndUncollected" abstract="false" name="CounterpartyDeficienciesUnbilledAndUncollected" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="paa_InventoryLinefillAndBaseGasAndLongTermInventoryDisclosureAbstract" abstract="true" name="InventoryLinefillAndBaseGasAndLongTermInventoryDisclosureAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="paa_ContractWithCustomerAssetsAndLiabilitiesLineItems" abstract="true" name="ContractWithCustomerAssetsAndLiabilitiesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="paa_EquityIndexedCompensationPlanAwardMember" abstract="true" name="EquityIndexedCompensationPlanAwardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_PartnersCapitalAndDistributionLineItems" abstract="true" name="PartnersCapitalAndDistributionLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="paa_LossContingencyReceivedAndReceivable" abstract="false" name="LossContingencyReceivedAndReceivable" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="paa_IndictmentNumberofMisdemeanorChargesGuiltyVerdictReportingCount" abstract="false" name="IndictmentNumberofMisdemeanorChargesGuiltyVerdictReportingCount" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="paa_SegmentFacilitiesMember" abstract="true" name="SegmentFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_Line901IncidentMember" abstract="true" name="Line901IncidentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_EstimatedSizeOfRelease" abstract="false" name="EstimatedSizeOfRelease" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:volumeItemType"/>
  <xs:element id="paa_InventoryVolumesLinefillAndBaseGas" abstract="false" name="InventoryVolumesLinefillAndBaseGas" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:volumeItemType"/>
  <xs:element id="paa_TariffActivitiesMember" abstract="true" name="TariffActivitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_InventoryVolumesNoncurrent" abstract="false" name="InventoryVolumesNoncurrent" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:volumeItemType"/>
  <xs:element id="paa_NumberOfStraddlePlantsAdditionalInterestsAcquired" abstract="false" name="NumberOfStraddlePlantsAdditionalInterestsAcquired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="paa_MinimumVolumeCommitmentAgreementsMember" abstract="true" name="MinimumVolumeCommitmentAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_GainOnImpairmentOfInvestmentsInUnconsolidatedEntitiesNet" abstract="false" name="GainOnImpairmentOfInvestmentsInUnconsolidatedEntitiesNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="paa_RailLoadAndUnloadMember" abstract="true" name="RailLoadAndUnloadMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_NetGainLossOnForeignCurrencyRevaluation" abstract="false" name="NetGainLossOnForeignCurrencyRevaluation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="paa_OperatingSegmentsExcludingIntersegmentEliminationMember" abstract="true" name="OperatingSegmentsExcludingIntersegmentEliminationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_BasicAndDilutedNetIncomePerCommonUnitLineItems" abstract="true" name="BasicAndDilutedNetIncomePerCommonUnitLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="paa_InventoryWeightedAveragePricePerUnitLinefillAndBaseGas" abstract="false" name="InventoryWeightedAveragePricePerUnitLinefillAndBaseGas" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="srt-types:perUnitItemType"/>
  <xs:element id="paa_DeficienciesUnderMinimumVolumeCommitmentsNet" abstract="false" name="DeficienciesUnderMinimumVolumeCommitmentsNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="paa_ContractWithCustomerCounterpartyDeficienciesTableTextBlock" abstract="false" name="ContractWithCustomerCounterpartyDeficienciesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="paa_ScheduleOfCalculationOfBasicAndDilutedNetIncomePerCommonUnitTable" abstract="true" name="ScheduleOfCalculationOfBasicAndDilutedNetIncomePerCommonUnitTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="paa_IndictmentNumberofMisdemeanorChargesGuiltyVerdictStrictLiabilityAnimalTakingsCount" abstract="false" name="IndictmentNumberofMisdemeanorChargesGuiltyVerdictStrictLiabilityAnimalTakingsCount" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="paa_CrudeOilTransactionsMember" abstract="true" name="CrudeOilTransactionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_LinefillAndBaseGas" abstract="false" name="LinefillAndBaseGas" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="paa_PlainsGPHoldingsLPMember" abstract="true" name="PlainsGPHoldingsLPMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_IndictmentInCaliforniaSuperiorCourtSantaBarbaraCountyMember" abstract="true" name="IndictmentInCaliforniaSuperiorCourtSantaBarbaraCountyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_JointVentureTransactionMember" abstract="true" name="JointVentureTransactionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_ContractwithCustomerLiabilityAdditions" abstract="false" name="ContractwithCustomerLiabilityAdditions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="paa_NaturalGasContractsMember" abstract="true" name="NaturalGasContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="paa_UnitholderDerivativeLawsuitsMember" abstract="true" name="UnitholderDerivativeLawsuitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
