Designation:D2158−16a´1StandardTestMethodforResiduesinLiquefiedPetroleum(LP)Gases1ThisstandardisissuedunderthefixeddesignationD2158;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—TheIPdesignationwasremovededitoriallyinFebruary2018.1.Scope*1.1Thistestmethodcoversthedeterminationofextraneousmaterialsweatheringabove38°Cthatarepresentinliquefiedpetroleumgases.TheextraneousmaterialswillgenerallybedissolvedintheLPG,butmayhavephase-separatedinsomeinstances.1.2Liquefiedpetroleumgasesthatcontaincertainanti-icingadditivescangiveerroneousresultsbythistestmethod.1.3Althoughthistestmethodhasbeenusedtoverifycleanlinessandlackofheavycontaminantsinpropaneformanyyears,itmightnotbesensitiveenoughtoprotectsomeequipmentfromoperationalproblemsorincreasedmainte-nance.Amoresensitivetest,abletodetectlowerlevelsofdissolvedcontaminants,couldberequiredforsomeapplica-tions.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D96TestMethodforWaterandSedimentinCrudeOilbyCentrifugeMethod(FieldProcedure)(Withdrawn2000)3D1796TestMethodforWaterandSedimentinFuelOilsbytheCentrifugeMethod(LaboratoryProcedure)D1835SpecificationforLiquefiedPetroleum(LP)GasesE1137S...
