Designation:D1412/D1412M−15StandardTestMethodforEquilibriumMoistureofCoalat96to97PercentRelativeHumidityand30°C1ThisstandardisissuedunderthefixeddesignationD1412/D1412M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversdeterminationoftheequilib-riummoistureofcoalinanatmosphereoverasaturatedsolutionofpotassiumsulfateat30°C.NOTE1—Forinformationconcerningtheexperimentalworkonwhichthistestmethodisbased,see(1-5).21.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3D121TerminologyofCoalandCokeD388ClassificationofCoalsbyRankD2013PracticeforPreparingCoalSamplesforAnalysisD2234/D2234MPracticeforCollectionofaGrossSampleofCoalD3172PracticeforProximateAnalysisofCoalandCokeD3173TestMethodforMoistureintheAnalysisSampleofCoalandCokeD3302TestMethodforTotalMoistureinCoalD4596PracticeforCollectionofChannelSamplesofCoalinaMine3.SignificanceandUse3.1Thistestmethodaffordsameansofestimatingthebedmoistureofeithercoalthatiswetandshowsvisiblesurfacemoistureorcoalthatmayhavelostsomemoisture.Itmaybeusedforestimatingthesurface,orextraneousmoistureofwetcoal,suchmoisturebeingthedifferencebetweenthetotalmoistureasdeterminedbyTestMethodD3302andtheequilibriummoisture.3.2WhensamplesarecollectedinconformitywithClassi-ficationD388,theequilibriummoistureisconsideredtobeequalto...
