Designation:D6849−13StandardPracticeforStorageandUseofLiquefiedPetroleumGases(LPG)inSampleCylindersforLPGTestMethods1ThisstandardisissuedunderthefixeddesignationD6849;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1ThispracticecoversinformationforthestorageanduseofLPGsamplesinstandardcylindersofthetypeusedinsamplingmethod,PracticeD1265andfloatingpistoncylindersusedinsamplingmethod,PracticeD3700.1.2ThispracticeisespeciallyapplicablewhentheLPGsampleisusedasaqualitycontrol(QC)referencematerialforLPGtestmethods,suchasgaschromatography(GC)analysis(TestMethodD2163)orvaporpressure(TestMethodD6897)thatuseonlyafewmLpertest,sincerelativelysmallportableDepartmentofTransportation(DOT)cylinders(forexample,20lbcommonbarbecuecylinders)canbeused.Thispracticecanbeappliedtoothertestmethods.However,testmethodsthatrequirealargeamountofsamplepertest(forexample,manualvaporpressureTestMethodD1267)willrequireQCvolumesinexcessof1000LifstoredinstandardDOTcylindersorAmericanSocietyofMechanicalEngineers(ASME)vessels.2.ReferencedDocuments2.1ASTMStandards:2D1265PracticeforSamplingLiquefiedPetroleum(LP)Gases,ManualMethodD1267TestMethodforGageVaporPressureofLiquefiedPetroleum(LP)Gases(LP-GasMethod)D2163TestMethodforDeterminationofHydrocarbonsinLiquefiedPetroleum(LP)GasesandPropane/PropeneMixturesbyGasChromatographyD3700PracticeforObtainingLPGSamplesUsingaFloat-ingPistonCylinderD6299PracticeforApplyingStatisticalQualityAssuranceandControlChartingTechniquestoEvaluateAnalyticalMeasurementSystemPerformanceD6897TestMethodforVaporPressureofLiquefiedPetro-leumGases(LPG)(ExpansionMethod)3.Terminology3.1Definitions:3.1.1floatingpistoncylinder(FPC),n—high-pressuresamplecontainerwithafree-floatinginternalpistonthateffectivelydividesthecontainerintotwoseparatecompart-ments.3.1.1.1Discussi...
