Designation:D4422−19StandardTestMethodforAshinAnalysisofPetroleumCoke1ThisstandardisissuedunderthefixeddesignationD4422;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationoftheashcontentofpetroleumcoke.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D346PracticeforCollectionandPreparationofCokeSamplesforLaboratoryAnalysisD2013PracticeforPreparingCoalSamplesforAnalysis3.SummaryofTestMethod3.1Arepresentativesampleofpetroleumcokeisdried,ground,andashedinamufflefurnaceat700°Cto750°C.Theresidueorashisexpressedasapercentageofthedrypetroleumcoke.4.SignificanceandUse4.1Theashcontentisoneofthepropertiesusedtoevaluatepetroleumcokeandindicatestheamountofundesirableresiduepresent.Acceptableashcontentvarieswiththein-tendeduse.5.Interferences5.1Highsulfurcontentofthefurnacegases,regardlessofthesourceofthesulfur,canreactwithanalkalineashtoproduceerraticresults.Thefurnacemustbesweptwithairtoachieveoxidationandtodecreasethesulfurcontentofthegases.5.2Preparationandtestingoftheanalysissamplemustneitherremovenoraddash.Improperdividing,sieving,andcrushingequipment,andsomemufflefurnaceliningmaterialcancontami...
