Designation:D4177−20ManualofPetroleumMeasurementStandards(MPMS),Chapter8.2StandardPracticeforAutomaticSamplingofPetroleumandPetroleumProducts1ThisstandardisissuedunderthefixeddesignationD4177;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.INTRODUCTIONThepreviousversionoftheautomaticsamplingpracticedescribedthedesign,installation,testing,andoperationofautomatedequipmentfortheextractionofrepresentativesamplesfromtheflowingstreamandstoringmainlyforcrudeoil.Thispracticeisaperformance-basedstandard.Itstillincludesthedesign,installation,testing,andoperationofautomatedequipmentforextractionofrepresentativesamples.Italsoincludesthetestingandprovingofasamplingsysteminthefieldunderactualoperatingconditionstoensurethattheequipment,installation,andoperatingproceduresproducerepresentativesamples.Theacceptancecriteriaforcustodytransferarecoveredinthispractice.Thispracticedoesnotaddresshowtosamplecrudeattemperaturesbelowthefreezingpointofwater.ExtensiverevisionshavebeenmadetothepriorversionofD4177(APIMPMSChapter8.2).Thispracticealsoprovidesguidanceforperiodicverificationofthesamplingsystem.Thispracticeisseparatedintothreeparts:General—Sections5–17(PartI)arecurrentlyapplicabletocrudeoilandrefinedproducts.Reviewthissectionbeforedesigningorinstallinganyautomaticsamplingsystem.CrudeOilSampling—Section18(PartII)containsadditionalinformationrequiredtocompletethedesign,testing,andmonitoringofacrudeoilsamplingsystem.RefinedProductSampling—Section19(PartIII)containsadditionalinformationrequiredtocompletethedesignofarefinedproductsamplingsystem.Arepresentativesampleis“Aportionextractedfromthetotalvolumethatcontainstheconstituentsinthesameproportionsthatarepresentinthattotalvolume.”Representativesamplesar...
