Designation:D341−20´1StandardPracticeforViscosity-TemperatureEquationsandChartsforLiquidPetroleumorHydrocarbonProducts1ThisstandardisissuedunderthefixeddesignationD341;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.ε1NOTE—EditoriallyremovedadjunctinformationinAugust2020.1.Scope*1.1Thispracticecoverskinematicviscosity-temperatureequationsandcharts(seeFigs.1-3),whichareaconvenientmeanstoascertainthekinematicviscosityofapetroleumoilorliquidhydrocarbonatanytemperaturewithinalimitedrange,providedthatthekinematicviscositiesattwotemperaturesareknown.1.2Thechartsaredesignedtopermitpetroleumoilkine-maticviscosity-temperaturedatatoplotasastraightline.ThechartshavebeenderivedfromtheequationsshowninSection5.ThechartsherepresentedprovideasignificantimprovementinlinearityoverthechartspreviouslyavailableunderMethodD341–03.Thisincreasesthereliabilityofextrapolationtohighertemperatures.1.3ThevaluesprovidedinSIunitsaretoberegardedasstandard.1.3.1Exception—Thevaluesgiveninparenthesesarepro-videdforinformationonly.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2NOTE1—AnyASTMstandardthatmeasureskinematicviscosityatmultipletemperaturesisapplicabletoD341.Someexamplesaregivenbelow.D445TestMethodforKinematicViscosityofTransparentandOpaqueLiquids(andCalculationofDynamicViscos-ity)D7042TestMethodforDynamicViscosityandDensityofLiquidsbyStabingerViscometer(andtheCalculationofKinematicViscosity)D7279TestMethodforKinematicViscosityofTransp...
