Designation:D3588−98(Reapproved2017)´1StandardPracticeforCalculatingHeatValue,CompressibilityFactor,andRelativeDensityofGaseousFuels1ThisstandardisissuedunderthefixeddesignationD3588;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—Note2waseditoriallycorrectedinApril2020.1.Scope1.1Thispracticecoversproceduresforcalculatingheatingvalue,relativedensity,andcompressibilityfactoratbaseconditions(14.696psiaand60°F(15.6°C))fornaturalgasmixturesfromcompositionalanalysis.2Itappliestoallcom-montypesofutilitygaseousfuels,forexample,drynaturalgas,reformedgas,oilgas(bothhighandlowBtu),propane-air,carburetedwatergas,cokeovengas,andretortcoalgas,forwhichsuitablemethodsofanalysisasdescribedinSection6areavailable.Calculationproceduresforotherbaseconditionsaregiven.1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIunitsgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:3D1717TestMethodforTestforAnalysisofCommericalButane-ButeneMixturesandIsolutylenebyGasChroma-tography(Withdrawn1984)4D1945TestMethodforAnalysisofNaturalGasbyGasChromatographyD1946PracticeforAnalysisofReformedGasbyGasChromatographyD2163TestMethodforDeterminationofHydrocarbonsinLiquefiedPetroleum(LP)GasesandPropane/PropeneMi...
