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    <link:label id="lab_us-gaap_AccruedLiabilitiesCurrent_088BC7276B36AB325B8DE16A3DD154C2_label_en-US" xlink:label="lab_us-gaap_AccruedLiabilitiesCurrent_088BC7276B36AB325B8DE16A3DD154C2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Liabilities, Current</link:label>
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    <link:label id="lab_us-gaap_LiabilitiesCurrent_5CFF88D55A1DDDB80207E16A3DD1B694_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_5CFF88D55A1DDDB80207E16A3DD1B694" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total current liabilities</link:label>
    <link:label id="lab_us-gaap_LiabilitiesCurrent_5CFF88D55A1DDDB80207E16A3DD1B694_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_5CFF88D55A1DDDB80207E16A3DD1B694" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Current</link:label>
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    <link:label id="lab_us-gaap_DueToRelatedPartiesNoncurrent_4EBAC81247466D68930FE16A3DD12409_terseLabel_en-US" xlink:label="lab_us-gaap_DueToRelatedPartiesNoncurrent_4EBAC81247466D68930FE16A3DD12409" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term debt payable to Westlake</link:label>
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    <link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_6E2A5EA3E47502773F01E16A3DD195A6_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent_6E2A5EA3E47502773F01E16A3DD195A6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other liabilities</link:label>
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    <link:label id="lab_us-gaap_StockholdersEquityAbstract_94B7AA1275A1B1EC31C2E16A3DD1DC72_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract_94B7AA1275A1B1EC31C2E16A3DD1DC72" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NET INVESTMENT</link:label>
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    <link:label id="lab_wlkp_NetInvestmentInPartnership_D56164F2A1E03B86AD74E16A3DD23E4D_terseLabel_en-US" xlink:label="lab_wlkp_NetInvestmentInPartnership_D56164F2A1E03B86AD74E16A3DD23E4D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net investment</link:label>
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    <link:label id="lab_us-gaap_LimitedPartnersCapitalAccount_B3329DE2B5CD1F503C63E16A3DD25CC1_terseLabel_en-US" xlink:label="lab_us-gaap_LimitedPartnersCapitalAccount_B3329DE2B5CD1F503C63E16A3DD25CC1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Limited partners' capital</link:label>
    <link:label id="lab_us-gaap_LimitedPartnersCapitalAccount_B3329DE2B5CD1F503C63E16A3DD25CC1_label_en-US" xlink:label="lab_us-gaap_LimitedPartnersCapitalAccount_B3329DE2B5CD1F503C63E16A3DD25CC1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Limited Partners' Capital Account</link:label>
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    <link:label id="lab_us-gaap_GeneralPartnersCapitalAccount_0BB6579E95DECABD7A7BE16A3DD27489_terseLabel_en-US" xlink:label="lab_us-gaap_GeneralPartnersCapitalAccount_0BB6579E95DECABD7A7BE16A3DD27489" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">General partner&#8212;Westlake</link:label>
    <link:label id="lab_us-gaap_GeneralPartnersCapitalAccount_0BB6579E95DECABD7A7BE16A3DD27489_label_en-US" xlink:label="lab_us-gaap_GeneralPartnersCapitalAccount_0BB6579E95DECABD7A7BE16A3DD27489" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">General Partners' Capital Account</link:label>
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    <link:label id="lab_us-gaap_PartnersCapital_A862108718320FD9C22FE16A3DD23ED9_terseLabel_en-US" xlink:label="lab_us-gaap_PartnersCapital_A862108718320FD9C22FE16A3DD23ED9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Westlake Chemical Partners LP partners' capital</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wlkp_NumberofProductionFacilities_766C2893F7D896B3B5D7E16A3D9B1C40" xlink:to="lab_wlkp_NumberofProductionFacilities_766C2893F7D896B3B5D7E16A3D9B1C40" xlink:type="arc" />
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentPeriod_986C0C10B3B7455B0C01E16A3D9B96BE_terseLabel_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentPeriod_986C0C10B3B7455B0C01E16A3D9B96BE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Term of sales agreement</link:label>
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentPeriod_986C0C10B3B7455B0C01E16A3D9B96BE_label_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentPeriod_986C0C10B3B7455B0C01E16A3D9B96BE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment, Period</link:label>
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentPeriod_986C0C10B3B7455B0C01E16A3D9B96BE_documentation_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentPeriod_986C0C10B3B7455B0C01E16A3D9B96BE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_LongtermPurchaseCommitmentPeriod" xlink:label="loc_wlkp_LongtermPurchaseCommitmentPeriod_986C0C10B3B7455B0C01E16A3D9B96BE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wlkp_LongtermPurchaseCommitmentPeriod_986C0C10B3B7455B0C01E16A3D9B96BE" xlink:to="lab_wlkp_LongtermPurchaseCommitmentPeriod_986C0C10B3B7455B0C01E16A3D9B96BE" xlink:type="arc" />
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentMinimumPercentageRequired_B4C27F6477AAB2387AAAE16A3D9B8922_terseLabel_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentMinimumPercentageRequired_B4C27F6477AAB2387AAAE16A3D9B8922" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum percentage required to be purchased</link:label>
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentMinimumPercentageRequired_B4C27F6477AAB2387AAAE16A3D9B8922_label_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentMinimumPercentageRequired_B4C27F6477AAB2387AAAE16A3D9B8922" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment, Minimum Percentage Required</link:label>
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentMinimumPercentageRequired_B4C27F6477AAB2387AAAE16A3D9B8922_documentation_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentMinimumPercentageRequired_B4C27F6477AAB2387AAAE16A3D9B8922" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment, Minimum Percentage Required</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_LongtermPurchaseCommitmentMinimumPercentageRequired" xlink:label="loc_wlkp_LongtermPurchaseCommitmentMinimumPercentageRequired_B4C27F6477AAB2387AAAE16A3D9B8922" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wlkp_LongtermPurchaseCommitmentMinimumPercentageRequired_B4C27F6477AAB2387AAAE16A3D9B8922" xlink:to="lab_wlkp_LongtermPurchaseCommitmentMinimumPercentageRequired_B4C27F6477AAB2387AAAE16A3D9B8922" xlink:type="arc" />
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentMaximumVolumeRequired_2DC833092BA31070C16BE16A3D9BEA50_terseLabel_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentMaximumVolumeRequired_2DC833092BA31070C16BE16A3D9BEA50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum mass required to be purchased</link:label>
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentMaximumVolumeRequired_2DC833092BA31070C16BE16A3D9BEA50_label_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentMaximumVolumeRequired_2DC833092BA31070C16BE16A3D9BEA50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment, Maximum Volume Required</link:label>
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentMaximumVolumeRequired_2DC833092BA31070C16BE16A3D9BEA50_documentation_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentMaximumVolumeRequired_2DC833092BA31070C16BE16A3D9BEA50" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment, Maximum Volume Required</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_LongtermPurchaseCommitmentMaximumVolumeRequired" xlink:label="loc_wlkp_LongtermPurchaseCommitmentMaximumVolumeRequired_2DC833092BA31070C16BE16A3D9BEA50" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wlkp_LongtermPurchaseCommitmentMaximumVolumeRequired_2DC833092BA31070C16BE16A3D9BEA50" xlink:to="lab_wlkp_LongtermPurchaseCommitmentMaximumVolumeRequired_2DC833092BA31070C16BE16A3D9BEA50" xlink:type="arc" />
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentFixedMargin_5492BD32E926A79A0A62E16A3D9B6E23_terseLabel_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentFixedMargin_5492BD32E926A79A0A62E16A3D9B6E23" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchase commitment, fixed margin on variable pricing</link:label>
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentFixedMargin_5492BD32E926A79A0A62E16A3D9B6E23_label_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentFixedMargin_5492BD32E926A79A0A62E16A3D9B6E23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment, Fixed Margin</link:label>
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentFixedMargin_5492BD32E926A79A0A62E16A3D9B6E23_documentation_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentFixedMargin_5492BD32E926A79A0A62E16A3D9B6E23" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment, Fixed Margin</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_LongtermPurchaseCommitmentFixedMargin" xlink:label="loc_wlkp_LongtermPurchaseCommitmentFixedMargin_5492BD32E926A79A0A62E16A3D9B6E23" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wlkp_LongtermPurchaseCommitmentFixedMargin_5492BD32E926A79A0A62E16A3D9B6E23" xlink:to="lab_wlkp_LongtermPurchaseCommitmentFixedMargin_5492BD32E926A79A0A62E16A3D9B6E23" xlink:type="arc" />
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentExpectedPercentageOfProductionToBeSold_0AE45CD7605C93713742E16A3D9B5191_terseLabel_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentExpectedPercentageOfProductionToBeSold_0AE45CD7605C93713742E16A3D9B5191" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expected percentage of production to be sold</link:label>
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentExpectedPercentageOfProductionToBeSold_0AE45CD7605C93713742E16A3D9B5191_label_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentExpectedPercentageOfProductionToBeSold_0AE45CD7605C93713742E16A3D9B5191" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment, Expected Percentage Of Production To Be Sold</link:label>
    <link:label id="lab_wlkp_LongtermPurchaseCommitmentExpectedPercentageOfProductionToBeSold_0AE45CD7605C93713742E16A3D9B5191_documentation_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentExpectedPercentageOfProductionToBeSold_0AE45CD7605C93713742E16A3D9B5191" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment, Expected Percentage Of Production To Be Sold</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_LongtermPurchaseCommitmentExpectedPercentageOfProductionToBeSold" xlink:label="loc_wlkp_LongtermPurchaseCommitmentExpectedPercentageOfProductionToBeSold_0AE45CD7605C93713742E16A3D9B5191" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wlkp_LongtermPurchaseCommitmentExpectedPercentageOfProductionToBeSold_0AE45CD7605C93713742E16A3D9B5191" xlink:to="lab_wlkp_LongtermPurchaseCommitmentExpectedPercentageOfProductionToBeSold_0AE45CD7605C93713742E16A3D9B5191" xlink:type="arc" />
    <link:label id="lab_us-gaap_NumberOfReportableSegments_EA0D19288C944E3328F9E16A3D9B9AC8_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfReportableSegments_EA0D19288C944E3328F9E16A3D9B9AC8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of reportable segments</link:label>
    <link:label id="lab_us-gaap_NumberOfReportableSegments_EA0D19288C944E3328F9E16A3D9B9AC8_label_en-US" xlink:label="lab_us-gaap_NumberOfReportableSegments_EA0D19288C944E3328F9E16A3D9B9AC8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Reportable Segments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="loc_us-gaap_NumberOfReportableSegments_EA0D19288C944E3328F9E16A3D9B9AC8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NumberOfReportableSegments_EA0D19288C944E3328F9E16A3D9B9AC8" xlink:to="lab_us-gaap_NumberOfReportableSegments_EA0D19288C944E3328F9E16A3D9B9AC8" xlink:type="arc" />
    <link:label id="lab_wlkp_ThresholdPeriodPastDueAccountsReceivableReviewed_B77D3BE7100E3FCC5915E16A3D9B0BC3_terseLabel_en-US" xlink:label="lab_wlkp_ThresholdPeriodPastDueAccountsReceivableReviewed_B77D3BE7100E3FCC5915E16A3D9B0BC3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Threshold period past due accounts receivable reviewed</link:label>
    <link:label id="lab_wlkp_ThresholdPeriodPastDueAccountsReceivableReviewed_B77D3BE7100E3FCC5915E16A3D9B0BC3_label_en-US" xlink:label="lab_wlkp_ThresholdPeriodPastDueAccountsReceivableReviewed_B77D3BE7100E3FCC5915E16A3D9B0BC3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Threshold Period Past Due Accounts Receivable Reviewed</link:label>
    <link:label id="lab_wlkp_ThresholdPeriodPastDueAccountsReceivableReviewed_B77D3BE7100E3FCC5915E16A3D9B0BC3_documentation_en-US" xlink:label="lab_wlkp_ThresholdPeriodPastDueAccountsReceivableReviewed_B77D3BE7100E3FCC5915E16A3D9B0BC3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Threshold Period Past Due Accounts Receivable Reviewed</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_ThresholdPeriodPastDueAccountsReceivableReviewed" xlink:label="loc_wlkp_ThresholdPeriodPastDueAccountsReceivableReviewed_B77D3BE7100E3FCC5915E16A3D9B0BC3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wlkp_ThresholdPeriodPastDueAccountsReceivableReviewed_B77D3BE7100E3FCC5915E16A3D9B0BC3" xlink:to="lab_wlkp_ThresholdPeriodPastDueAccountsReceivableReviewed_B77D3BE7100E3FCC5915E16A3D9B0BC3" xlink:type="arc" />
    <link:label id="lab_us-gaap_Goodwill_E4DE4F7FA5625FC96FF0E16A3D9B950A_terseLabel_en-US" xlink:label="lab_us-gaap_Goodwill_E4DE4F7FA5625FC96FF0E16A3D9B950A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_E4DE4F7FA5625FC96FF0E16A3D9B950A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_E4DE4F7FA5625FC96FF0E16A3D9B950A" xlink:to="lab_us-gaap_Goodwill_E4DE4F7FA5625FC96FF0E16A3D9B950A" xlink:type="arc" />
    <link:label id="lab_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMinimum_AA18000A3EB7166C46F5E16A3D9B3D23_terseLabel_en-US" xlink:label="lab_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMinimum_AA18000A3EB7166C46F5E16A3D9B3D23" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization period, minimum (in years)</link:label>
    <link:label id="lab_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMinimum_AA18000A3EB7166C46F5E16A3D9B3D23_label_en-US" xlink:label="lab_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMinimum_AA18000A3EB7166C46F5E16A3D9B3D23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plant And Equipment Planned Major Maintenance Activities Amortization Period Minimum</link:label>
    <link:label id="lab_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMinimum_AA18000A3EB7166C46F5E16A3D9B3D23_documentation_en-US" xlink:label="lab_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMinimum_AA18000A3EB7166C46F5E16A3D9B3D23" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The minimum amortization period of planned major maintenance activities.</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMinimum" xlink:label="loc_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMinimum_AA18000A3EB7166C46F5E16A3D9B3D23" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMinimum_AA18000A3EB7166C46F5E16A3D9B3D23" xlink:to="lab_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMinimum_AA18000A3EB7166C46F5E16A3D9B3D23" xlink:type="arc" />
    <link:label id="lab_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMaximum_EE132FCA138BF2FD66DAE16A3D9B65F2_terseLabel_en-US" xlink:label="lab_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMaximum_EE132FCA138BF2FD66DAE16A3D9B65F2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization period, maximum (in years)</link:label>
    <link:label id="lab_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMaximum_EE132FCA138BF2FD66DAE16A3D9B65F2_label_en-US" xlink:label="lab_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMaximum_EE132FCA138BF2FD66DAE16A3D9B65F2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plant And Equipment Planned Major Maintenance Activities Amortization Period Maximum</link:label>
    <link:label id="lab_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMaximum_EE132FCA138BF2FD66DAE16A3D9B65F2_documentation_en-US" xlink:label="lab_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMaximum_EE132FCA138BF2FD66DAE16A3D9B65F2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The maximum amortization period of planned major maintenance activities.</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMaximum" xlink:label="loc_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMaximum_EE132FCA138BF2FD66DAE16A3D9B65F2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMaximum_EE132FCA138BF2FD66DAE16A3D9B65F2" xlink:to="lab_wlkp_PlantAndEquipmentPlannedMajorMaintenanceActivitiesAmortizationPeriodMaximum_EE132FCA138BF2FD66DAE16A3D9B65F2" xlink:type="arc" />
    <link:label id="lab_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMinimum_209B4BCA67903555C047E16A3D9B4965_terseLabel_en-US" xlink:label="lab_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMinimum_209B4BCA67903555C047E16A3D9B4965" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other assets amortization period, minimum (in years)</link:label>
    <link:label id="lab_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMinimum_209B4BCA67903555C047E16A3D9B4965_label_en-US" xlink:label="lab_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMinimum_209B4BCA67903555C047E16A3D9B4965" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite Lived Intangible Assets Amortization Period Minimum</link:label>
    <link:label id="lab_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMinimum_209B4BCA67903555C047E16A3D9B4965_documentation_en-US" xlink:label="lab_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMinimum_209B4BCA67903555C047E16A3D9B4965" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The minimum amortization period of finite-lived intangible assets.</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMinimum" xlink:label="loc_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMinimum_209B4BCA67903555C047E16A3D9B4965" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMinimum_209B4BCA67903555C047E16A3D9B4965" xlink:to="lab_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMinimum_209B4BCA67903555C047E16A3D9B4965" xlink:type="arc" />
    <link:label id="lab_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMaximum_304EB41245E24AB79CE4E16A3D9B72F0_terseLabel_en-US" xlink:label="lab_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMaximum_304EB41245E24AB79CE4E16A3D9B72F0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other assets amortization period, maximum (in years)</link:label>
    <link:label id="lab_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMaximum_304EB41245E24AB79CE4E16A3D9B72F0_label_en-US" xlink:label="lab_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMaximum_304EB41245E24AB79CE4E16A3D9B72F0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite Lived Intangible Assets Amortization Period Maximum</link:label>
    <link:label id="lab_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMaximum_304EB41245E24AB79CE4E16A3D9B72F0_documentation_en-US" xlink:label="lab_wlkp_FiniteLivedIntangibleAssetsAmortizationPeriodMaximum_304EB41245E24AB79CE4E16A3D9B72F0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The maximum amortization period of finite-lived intangible assets.</link:label>
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    <link:label id="lab_us-gaap_EquityComponentDomain_066E4E15A8DC06237984E16A3DB83FA8_label_en-US" xlink:label="lab_us-gaap_EquityComponentDomain_066E4E15A8DC06237984E16A3DB83FA8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Component [Domain]</link:label>
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    <link:label id="lab_us-gaap_PartnersCapitalAccountPublicSaleOfUnits_7353F890E6C2F35DA91CE16A3DB808E7_terseLabel_en-US" xlink:label="lab_us-gaap_PartnersCapitalAccountPublicSaleOfUnits_7353F890E6C2F35DA91CE16A3DB808E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from initial public offering, net of finance and other offering costs</link:label>
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    <link:label id="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_DAF9537312961B6D96C4E5859462E084_terseLabel_en-US" xlink:label="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_DAF9537312961B6D96C4E5859462E084" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basis of Presentation</link:label>
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_D4B483036CE7A7B25DF5E58594631EE9_verboseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_D4B483036CE7A7B25DF5E58594631EE9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash And Cash Equivalents</link:label>
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    <link:label id="lab_us-gaap_ReceivablesTradeAndOtherAccountsReceivableAllowanceForDoubtfulAccountsPolicy_32A8A02B5EB8806B3A09E585946386EA_verboseLabel_en-US" xlink:label="lab_us-gaap_ReceivablesTradeAndOtherAccountsReceivableAllowanceForDoubtfulAccountsPolicy_32A8A02B5EB8806B3A09E585946386EA" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Allowance For Doubtful Accounts</link:label>
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    <link:label id="lab_us-gaap_InventoryPolicyTextBlock_C844D0880392873479A0E585946340D1_verboseLabel_en-US" xlink:label="lab_us-gaap_InventoryPolicyTextBlock_C844D0880392873479A0E585946340D1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Inventories</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_C98DBE569C967CAE82C6E5859463491D_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_C98DBE569C967CAE82C6E5859463491D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment</link:label>
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    <link:label id="lab_us-gaap_UndistributedEarnings_ACC8923DF7357D3C8910ECCDB288672C_terseLabel_en-US" xlink:label="lab_us-gaap_UndistributedEarnings_ACC8923DF7357D3C8910ECCDB288672C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income subsequent to the IPO in excess of distribution</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis" xlink:label="loc_us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis_F2701885703C2CBE163CE6E8258E4271" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DistributionTypeDomain_6E9C53A944F6ECF73442E6E8258E4B65_terseLabel_en-US" xlink:label="lab_us-gaap_DistributionTypeDomain_6E9C53A944F6ECF73442E6E8258E4B65" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Distribution Type [Domain]</link:label>
    <link:label id="lab_us-gaap_DistributionTypeDomain_6E9C53A944F6ECF73442E6E8258E4B65_label_en-US" xlink:label="lab_us-gaap_DistributionTypeDomain_6E9C53A944F6ECF73442E6E8258E4B65" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Distribution Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DistributionTypeDomain" xlink:label="loc_us-gaap_DistributionTypeDomain_6E9C53A944F6ECF73442E6E8258E4B65" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashDistributionMember_1EF24E78B6F3F27E8C16E6E8258E2D60_terseLabel_en-US" xlink:label="lab_us-gaap_CashDistributionMember_1EF24E78B6F3F27E8C16E6E8258E2D60" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash Distribution [Member]</link:label>
    <link:label id="lab_us-gaap_CashDistributionMember_1EF24E78B6F3F27E8C16E6E8258E2D60_label_en-US" xlink:label="lab_us-gaap_CashDistributionMember_1EF24E78B6F3F27E8C16E6E8258E2D60" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Distribution [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashDistributionMember" xlink:label="loc_us-gaap_CashDistributionMember_1EF24E78B6F3F27E8C16E6E8258E2D60" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashDistributionMember_1EF24E78B6F3F27E8C16E6E8258E2D60" xlink:to="lab_us-gaap_CashDistributionMember_1EF24E78B6F3F27E8C16E6E8258E2D60" xlink:type="arc" />
    <link:label id="lab_wlkp_CashDistributionTrancheOneMember_97D93E91D38A63771692E6E8258ED9F4_terseLabel_en-US" xlink:label="lab_wlkp_CashDistributionTrancheOneMember_97D93E91D38A63771692E6E8258ED9F4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Above $0.3163 up to $0.3438</link:label>
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    <link:label id="lab_wlkp_CashDistributionTrancheOneMember_97D93E91D38A63771692E6E8258ED9F4_documentation_en-US" xlink:label="lab_wlkp_CashDistributionTrancheOneMember_97D93E91D38A63771692E6E8258ED9F4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash Distribution, Tranche One [Member]</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_CashDistributionTrancheOneMember" xlink:label="loc_wlkp_CashDistributionTrancheOneMember_97D93E91D38A63771692E6E8258ED9F4" xlink:type="locator" />
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    <link:label id="lab_wlkp_CashDistributionTrancheTwoMember_50428CF6EB7118FAF3FBE6E8258E93E7_terseLabel_en-US" xlink:label="lab_wlkp_CashDistributionTrancheTwoMember_50428CF6EB7118FAF3FBE6E8258E93E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Above $0.3438 up to $0.4125</link:label>
    <link:label id="lab_wlkp_CashDistributionTrancheTwoMember_50428CF6EB7118FAF3FBE6E8258E93E7_label_en-US" xlink:label="lab_wlkp_CashDistributionTrancheTwoMember_50428CF6EB7118FAF3FBE6E8258E93E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Distribution, Tranche Two [Member]</link:label>
    <link:label id="lab_wlkp_CashDistributionTrancheTwoMember_50428CF6EB7118FAF3FBE6E8258E93E7_documentation_en-US" xlink:label="lab_wlkp_CashDistributionTrancheTwoMember_50428CF6EB7118FAF3FBE6E8258E93E7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash Distribution, Tranche Two [Member]</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_CashDistributionTrancheTwoMember" xlink:label="loc_wlkp_CashDistributionTrancheTwoMember_50428CF6EB7118FAF3FBE6E8258E93E7" xlink:type="locator" />
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    <link:label id="lab_wlkp_CashDistributionTrancheThreeMember_12BAAC3C79599C129F3BE6E8258FB0E8_terseLabel_en-US" xlink:label="lab_wlkp_CashDistributionTrancheThreeMember_12BAAC3C79599C129F3BE6E8258FB0E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Above $0.4125</link:label>
    <link:label id="lab_wlkp_CashDistributionTrancheThreeMember_12BAAC3C79599C129F3BE6E8258FB0E8_label_en-US" xlink:label="lab_wlkp_CashDistributionTrancheThreeMember_12BAAC3C79599C129F3BE6E8258FB0E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Distribution, Tranche Three [Member]</link:label>
    <link:label id="lab_wlkp_CashDistributionTrancheThreeMember_12BAAC3C79599C129F3BE6E8258FB0E8_documentation_en-US" xlink:label="lab_wlkp_CashDistributionTrancheThreeMember_12BAAC3C79599C129F3BE6E8258FB0E8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash Distribution, Tranche Three [Member]</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_CashDistributionTrancheThreeMember" xlink:label="loc_wlkp_CashDistributionTrancheThreeMember_12BAAC3C79599C129F3BE6E8258FB0E8" xlink:type="locator" />
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    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_UnitHoldersMember" xlink:label="loc_wlkp_UnitHoldersMember_23804DFE679B6313A5A7E6E8258FCBD6" xlink:type="locator" />
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    <link:label id="lab_wlkp_ExcessProductionOptionMember_95EB639092DEA0CF0F1BE6E8263167C9_label_en-US" xlink:label="lab_wlkp_ExcessProductionOptionMember_95EB639092DEA0CF0F1BE6E8263167C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Excess Production Option [Member]</link:label>
    <link:label id="lab_wlkp_ExcessProductionOptionMember_95EB639092DEA0CF0F1BE6E8263167C9_documentation_en-US" xlink:label="lab_wlkp_ExcessProductionOptionMember_95EB639092DEA0CF0F1BE6E8263167C9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Excess Production Option [Member]</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_ExcessProductionOptionMember" xlink:label="loc_wlkp_ExcessProductionOptionMember_95EB639092DEA0CF0F1BE6E8263167C9" xlink:type="locator" />
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    <link:label id="lab_wlkp_FeedstockSupplyAgreementMember_95C3D8A3AB47E62A714FE6E826317284_terseLabel_en-US" xlink:label="lab_wlkp_FeedstockSupplyAgreementMember_95C3D8A3AB47E62A714FE6E826317284" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Feedstock Supply Agreement [Member]</link:label>
    <link:label id="lab_wlkp_FeedstockSupplyAgreementMember_95C3D8A3AB47E62A714FE6E826317284_label_en-US" xlink:label="lab_wlkp_FeedstockSupplyAgreementMember_95C3D8A3AB47E62A714FE6E826317284" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Feedstock Supply Agreement [Member]</link:label>
    <link:label id="lab_wlkp_FeedstockSupplyAgreementMember_95C3D8A3AB47E62A714FE6E826317284_documentation_en-US" xlink:label="lab_wlkp_FeedstockSupplyAgreementMember_95C3D8A3AB47E62A714FE6E826317284" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Feedstock Supply Agreement [Member]</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_FeedstockSupplyAgreementMember" xlink:label="loc_wlkp_FeedstockSupplyAgreementMember_95C3D8A3AB47E62A714FE6E826317284" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wlkp_FeedstockSupplyAgreementMember_95C3D8A3AB47E62A714FE6E826317284" xlink:to="lab_wlkp_FeedstockSupplyAgreementMember_95C3D8A3AB47E62A714FE6E826317284" xlink:type="arc" />
    <link:label id="lab_wlkp_ServicesAndSecondmentAgreementMember_036359C62663DA3CB939E6E82631D5E2_terseLabel_en-US" xlink:label="lab_wlkp_ServicesAndSecondmentAgreementMember_036359C62663DA3CB939E6E82631D5E2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Services And Secondment Agreement [Member]</link:label>
    <link:label id="lab_wlkp_ServicesAndSecondmentAgreementMember_036359C62663DA3CB939E6E82631D5E2_label_en-US" xlink:label="lab_wlkp_ServicesAndSecondmentAgreementMember_036359C62663DA3CB939E6E82631D5E2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Services And Secondment Agreement [Member]</link:label>
    <link:label id="lab_wlkp_ServicesAndSecondmentAgreementMember_036359C62663DA3CB939E6E82631D5E2_documentation_en-US" xlink:label="lab_wlkp_ServicesAndSecondmentAgreementMember_036359C62663DA3CB939E6E82631D5E2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Services And Secondment Agreement [Member]</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_ServicesAndSecondmentAgreementMember" xlink:label="loc_wlkp_ServicesAndSecondmentAgreementMember_036359C62663DA3CB939E6E82631D5E2" xlink:type="locator" />
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    <link:label id="lab_us-gaap_InvestorMember_8A70F73A1AA25094ABC7E6E82632054D_terseLabel_en-US" xlink:label="lab_us-gaap_InvestorMember_8A70F73A1AA25094ABC7E6E82632054D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investor [Member]</link:label>
    <link:label id="lab_us-gaap_InvestorMember_8A70F73A1AA25094ABC7E6E82632054D_label_en-US" xlink:label="lab_us-gaap_InvestorMember_8A70F73A1AA25094ABC7E6E82632054D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investor [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestorMember" xlink:label="loc_us-gaap_InvestorMember_8A70F73A1AA25094ABC7E6E82632054D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestorMember_8A70F73A1AA25094ABC7E6E82632054D" xlink:to="lab_us-gaap_InvestorMember_8A70F73A1AA25094ABC7E6E82632054D" xlink:type="arc" />
    <link:label id="lab_us-gaap_LimitedPartnersCapitalAccountLineItems_7F07E0EF5F64219A64F3E6E82632E695_terseLabel_en-US" xlink:label="lab_us-gaap_LimitedPartnersCapitalAccountLineItems_7F07E0EF5F64219A64F3E6E82632E695" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Limited Partners' Capital Account [Line Items]</link:label>
    <link:label id="lab_us-gaap_LimitedPartnersCapitalAccountLineItems_7F07E0EF5F64219A64F3E6E82632E695_label_en-US" xlink:label="lab_us-gaap_LimitedPartnersCapitalAccountLineItems_7F07E0EF5F64219A64F3E6E82632E695" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Limited Partners' Capital Account [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LimitedPartnersCapitalAccountLineItems" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountLineItems_7F07E0EF5F64219A64F3E6E82632E695" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccountLineItems_7F07E0EF5F64219A64F3E6E82632E695" xlink:to="lab_us-gaap_LimitedPartnersCapitalAccountLineItems_7F07E0EF5F64219A64F3E6E82632E695" xlink:type="arc" />
    <link:label id="lab_wlkp_IntercompanyDebt_30483C87F0B4B986E0D3E6E826329DC5_terseLabel_en-US" xlink:label="lab_wlkp_IntercompanyDebt_30483C87F0B4B986E0D3E6E826329DC5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt assumed by acquiree</link:label>
    <link:label id="lab_wlkp_IntercompanyDebt_30483C87F0B4B986E0D3E6E826329DC5_label_en-US" xlink:label="lab_wlkp_IntercompanyDebt_30483C87F0B4B986E0D3E6E826329DC5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intercompany Debt</link:label>
    <link:label id="lab_wlkp_IntercompanyDebt_30483C87F0B4B986E0D3E6E826329DC5_documentation_en-US" xlink:label="lab_wlkp_IntercompanyDebt_30483C87F0B4B986E0D3E6E826329DC5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Intercompany Debt</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_IntercompanyDebt" xlink:label="loc_wlkp_IntercompanyDebt_30483C87F0B4B986E0D3E6E826329DC5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wlkp_IntercompanyDebt_30483C87F0B4B986E0D3E6E826329DC5" xlink:to="lab_wlkp_IntercompanyDebt_30483C87F0B4B986E0D3E6E826329DC5" xlink:type="arc" />
    <link:label id="lab_wlkp_SaleofUnitPricePerUnit_BC14B8B9016848917F71E6E826324B06_terseLabel_en-US" xlink:label="lab_wlkp_SaleofUnitPricePerUnit_BC14B8B9016848917F71E6E826324B06" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Price per unit</link:label>
    <link:label id="lab_wlkp_SaleofUnitPricePerUnit_BC14B8B9016848917F71E6E826324B06_label_en-US" xlink:label="lab_wlkp_SaleofUnitPricePerUnit_BC14B8B9016848917F71E6E826324B06" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale of Unit, Price Per Unit</link:label>
    <link:label id="lab_wlkp_SaleofUnitPricePerUnit_BC14B8B9016848917F71E6E826324B06_documentation_en-US" xlink:label="lab_wlkp_SaleofUnitPricePerUnit_BC14B8B9016848917F71E6E826324B06" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sale of Unit, Price Per Unit</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_SaleofUnitPricePerUnit" xlink:label="loc_wlkp_SaleofUnitPricePerUnit_BC14B8B9016848917F71E6E826324B06" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wlkp_SaleofUnitPricePerUnit_BC14B8B9016848917F71E6E826324B06" xlink:to="lab_wlkp_SaleofUnitPricePerUnit_BC14B8B9016848917F71E6E826324B06" xlink:type="arc" />
    <link:label id="lab_wlkp_SaleofUnitPricePerUnitNetofUnderwritingDiscount_7077EB1E1BC185B827FBE6E826329963_terseLabel_en-US" xlink:label="lab_wlkp_SaleofUnitPricePerUnitNetofUnderwritingDiscount_7077EB1E1BC185B827FBE6E826329963" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Price per unit, net of underwriting discount</link:label>
    <link:label id="lab_wlkp_SaleofUnitPricePerUnitNetofUnderwritingDiscount_7077EB1E1BC185B827FBE6E826329963_label_en-US" xlink:label="lab_wlkp_SaleofUnitPricePerUnitNetofUnderwritingDiscount_7077EB1E1BC185B827FBE6E826329963" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale of Unit, Price Per Unit, Net of Underwriting Discount</link:label>
    <link:label id="lab_wlkp_SaleofUnitPricePerUnitNetofUnderwritingDiscount_7077EB1E1BC185B827FBE6E826329963_documentation_en-US" xlink:label="lab_wlkp_SaleofUnitPricePerUnitNetofUnderwritingDiscount_7077EB1E1BC185B827FBE6E826329963" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sale of Unit, Price Per Unit, Net of Underwriting Discount</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_SaleofUnitPricePerUnitNetofUnderwritingDiscount" xlink:label="loc_wlkp_SaleofUnitPricePerUnitNetofUnderwritingDiscount_7077EB1E1BC185B827FBE6E826329963" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding_D77A2592E126702C6136E6E82632A80D_terseLabel_en-US" xlink:label="lab_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding_D77A2592E126702C6136E6E82632A80D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Units outstanding</link:label>
    <link:label id="lab_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding_D77A2592E126702C6136E6E82632A80D_label_en-US" xlink:label="lab_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding_D77A2592E126702C6136E6E82632A80D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Limited Partners' Capital Account, Units Outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding_D77A2592E126702C6136E6E82632A80D" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits_3A0BD2D547893EA43DF3E6E82632011F_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits_3A0BD2D547893EA43DF3E6E82632011F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net proceeds from issuance of common units</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits_3A0BD2D547893EA43DF3E6E82632011F_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits_3A0BD2D547893EA43DF3E6E82632011F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Common Limited Partners Units</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits_3A0BD2D547893EA43DF3E6E82632011F" xlink:type="locator" />
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    <link:label id="lab_wlkp_PaymentsofUnitIssuanceCosts_DAFA607FF3CD92072EC7E6E826322138_terseLabel_en-US" xlink:label="lab_wlkp_PaymentsofUnitIssuanceCosts_DAFA607FF3CD92072EC7E6E826322138" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payments of unit issuance costs</link:label>
    <link:label id="lab_wlkp_PaymentsofUnitIssuanceCosts_DAFA607FF3CD92072EC7E6E826322138_label_en-US" xlink:label="lab_wlkp_PaymentsofUnitIssuanceCosts_DAFA607FF3CD92072EC7E6E826322138" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Unit Issuance Costs</link:label>
    <link:label id="lab_wlkp_PaymentsofUnitIssuanceCosts_DAFA607FF3CD92072EC7E6E826322138_documentation_en-US" xlink:label="lab_wlkp_PaymentsofUnitIssuanceCosts_DAFA607FF3CD92072EC7E6E826322138" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Payments of Unit Issuance Costs</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_PaymentsofUnitIssuanceCosts" xlink:label="loc_wlkp_PaymentsofUnitIssuanceCosts_DAFA607FF3CD92072EC7E6E826322138" xlink:type="locator" />
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    <link:label id="lab_wlkp_LimitedLiabilityCompanyLLCorLimitedPartnershipLPMembersorLimitedPartnersAdditionalOwnershipInterest_03757BF66090347241C5E6E82632C214_terseLabel_en-US" xlink:label="lab_wlkp_LimitedLiabilityCompanyLLCorLimitedPartnershipLPMembersorLimitedPartnersAdditionalOwnershipInterest_03757BF66090347241C5E6E82632C214" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additional ownership interest acquired</link:label>
    <link:label id="lab_wlkp_LimitedLiabilityCompanyLLCorLimitedPartnershipLPMembersorLimitedPartnersAdditionalOwnershipInterest_03757BF66090347241C5E6E82632C214_label_en-US" xlink:label="lab_wlkp_LimitedLiabilityCompanyLLCorLimitedPartnershipLPMembersorLimitedPartnersAdditionalOwnershipInterest_03757BF66090347241C5E6E82632C214" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Additional Ownership Interest</link:label>
    <link:label id="lab_wlkp_LimitedLiabilityCompanyLLCorLimitedPartnershipLPMembersorLimitedPartnersAdditionalOwnershipInterest_03757BF66090347241C5E6E82632C214_documentation_en-US" xlink:label="lab_wlkp_LimitedLiabilityCompanyLLCorLimitedPartnershipLPMembersorLimitedPartnersAdditionalOwnershipInterest_03757BF66090347241C5E6E82632C214" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Additional Ownership Interest</link:label>
    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_LimitedLiabilityCompanyLLCorLimitedPartnershipLPMembersorLimitedPartnersAdditionalOwnershipInterest" xlink:label="loc_wlkp_LimitedLiabilityCompanyLLCorLimitedPartnershipLPMembersorLimitedPartnersAdditionalOwnershipInterest_03757BF66090347241C5E6E82632C214" xlink:type="locator" />
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    <link:label id="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_DB13B980EC1B73CE8D9BE6E8263271C9_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_DB13B980EC1B73CE8D9BE6E8263271C9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Carrying value of additional partnership interest purchased</link:label>
    <link:label id="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_DB13B980EC1B73CE8D9BE6E8263271C9_label_en-US" xlink:label="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_DB13B980EC1B73CE8D9BE6E8263271C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MinorityInterestDecreaseFromRedemptions" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_DB13B980EC1B73CE8D9BE6E8263271C9" xlink:type="locator" />
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    <link:label id="lab_wlkp_NoncontrollingInterestDecreaseDueToExcessCashPaidOverCarryingValue_14588B80E91D70A44BA4E6E8263237E1_terseLabel_en-US" xlink:label="lab_wlkp_NoncontrollingInterestDecreaseDueToExcessCashPaidOverCarryingValue_14588B80E91D70A44BA4E6E8263237E1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Excess cash paid over carrying value of partnership interest</link:label>
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    <link:label id="lab_wlkp_PreformationCapitalExpenditures_8BDB1823BA24E343DC63E6E826327760_terseLabel_en-US" xlink:label="lab_wlkp_PreformationCapitalExpenditures_8BDB1823BA24E343DC63E6E826327760" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital expenditures</link:label>
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    <link:label id="lab_wlkp_LongtermPurchaseCommitmentOptionToPurchaseExcessProductionPercentage_8F43B297615BAEC41C80E6E8263356E1_terseLabel_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentOptionToPurchaseExcessProductionPercentage_8F43B297615BAEC41C80E6E8263356E1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of excess production that can be purchased</link:label>
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    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_LongtermPurchaseCommitmentOptionToPurchaseExcessProductionPercentage" xlink:label="loc_wlkp_LongtermPurchaseCommitmentOptionToPurchaseExcessProductionPercentage_8F43B297615BAEC41C80E6E8263356E1" xlink:type="locator" />
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    <link:label id="lab_wlkp_LongtermPurchaseCommitmentTermsofFeeNumberOfYearsUsedToCalculateAverageExpenses_4763C730C24CA940C5B8E6E8263354EC_terseLabel_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentTermsofFeeNumberOfYearsUsedToCalculateAverageExpenses_4763C730C24CA940C5B8E6E8263354EC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of years used to calculate average expenses</link:label>
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    <link:loc xlink:href="wlkp-20141231.xsd#wlkp_LongtermPurchaseCommitmentTermsofFeeNumberOfYearsUsedToCalculateAverageExpenses" xlink:label="loc_wlkp_LongtermPurchaseCommitmentTermsofFeeNumberOfYearsUsedToCalculateAverageExpenses_4763C730C24CA940C5B8E6E8263354EC" xlink:type="locator" />
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    <link:label id="lab_wlkp_LongtermPurchaseCommitmentRenewalTerm_BFDE011BB7A94BCE88A3E6E826334F5E_terseLabel_en-US" xlink:label="lab_wlkp_LongtermPurchaseCommitmentRenewalTerm_BFDE011BB7A94BCE88A3E6E826334F5E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchase commitment, renewal term</link:label>
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    <link:label id="lab_wlkp_RelatedPartyTransactionCounterpartyDefaultPeriodOfDefaultAllowingTerminationOfAgreement_B94F5F9ECCCDFB77AB14E6E8263331A3_terseLabel_en-US" xlink:label="lab_wlkp_RelatedPartyTransactionCounterpartyDefaultPeriodOfDefaultAllowingTerminationOfAgreement_B94F5F9ECCCDFB77AB14E6E8263331A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Period of default in performance that can allow a party to terminate agreement</link:label>
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    <link:label id="lab_us-gaap_LineOfCreditMember_349A300F3AC21CCBDDF0E6E825E22FB8_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditMember_349A300F3AC21CCBDDF0E6E825E22FB8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit [Member]</link:label>
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    <link:label id="lab_wlkp_SeniorUnsecuredRevolvingCreditFacilityMember_C93C5A5C9A326B0E0878E6E825E218D6_terseLabel_en-US" xlink:label="lab_wlkp_SeniorUnsecuredRevolvingCreditFacilityMember_C93C5A5C9A326B0E0878E6E825E218D6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior Unsecured Revolving Credit Facility [Member]</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F30C88C349805946342CE740D8F28E2A_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F30C88C349805946342CE740D8F28E2A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash flows from investing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F30C88C349805946342CE740D8F28E2A_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F30C88C349805946342CE740D8F28E2A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F30C88C349805946342CE740D8F28E2A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_6D133DC6538D3F32DC65E740D8F21674_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_6D133DC6538D3F32DC65E740D8F21674" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Additions to property, plant and equipment</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_6D133DC6538D3F32DC65E740D8F21674" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities_CF399A5E074799BADCE9E740D8F255BD_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities_CF399A5E074799BADCE9E740D8F255BD" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Settlements of derivative instruments</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities_CF399A5E074799BADCE9E740D8F255BD" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_882B411BFB2719FE503DE740D8F2FBA9_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_882B411BFB2719FE503DE740D8F2FBA9" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash used for investing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_882B411BFB2719FE503DE740D8F2FBA9_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_882B411BFB2719FE503DE740D8F2FBA9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_882B411BFB2719FE503DE740D8F2FBA9" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_0FE6F299C57C4C50882BE740D8F29C30_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_0FE6F299C57C4C50882BE740D8F29C30" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash flows from financing activities</link:label>
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    <link:label id="lab_us-gaap_PaymentsOfDistributionsToAffiliates_7C164B3ECC1D38EE8A2AE740D8F26F0A_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDistributionsToAffiliates_7C164B3ECC1D38EE8A2AE740D8F26F0A" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Net distributions to Westlake prior to initial public offering</link:label>
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