Designation:D8420−21StandardTestMethodforWaxAppearanceTemperatureandWaxDisappearanceTemperatureofPetroleumProductsandLiquidFuels1ThisstandardisissuedunderthefixeddesignationD8420;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthewaxappearancetemperatureandthewaxdisappearancetempera-tureofpetroleumproductsandliquidfuelsbyanautomaticinstrumentusingopticallightscatteringdetection.1.2Thistestmethodisapplicabletosuchmaterialsas:crudeoil,distillatefuels,residualfuelssuchasNo.6FuelOil,marinefuelssuchasVLSFO,andincludingmixturesofthesefuelsandliquidbiofuels.1.3Thistestmethodcoverstherangeoftemperaturesfrom–30°Cto+75°Cwithtemperatureresolutionof0.1°C.1.4Thistestmethodcontainsinterimprecisionwithrepeat-abilityonly;afullILSwillbecompletedwithinfiveyearsofitsapproval.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D4057PracticeforManualSamplingofPetroleumandPetroleumProductsD4177PracticeforAutomaticSamplingofPetroleumandPetroleumProductsD5773TestMethodforCloudPointofPetroleumProductsandLiquidFuels(ConstantCoolingRateMethod)D6300PracticeforDeterminationofPrecisionandBiasDataforUseinTestMethods...
