Designation:D341−09(Reapproved2015)StandardPracticeforViscosity-TemperatureChartsforLiquidPetroleumProducts1ThisstandardisissuedunderthefixeddesignationD341;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thispracticecoverskinematicviscosity-temperaturecharts(seeFigs.1and2),whichareaconvenientmeanstoascertainthekinematicviscosityofapetroleumoilorliquidhydrocarbonatanytemperaturewithinalimitedrange,pro-videdthatthekinematicviscositiesattwotemperaturesareknown.1.2Thechartsaredesignedtopermitpetroleumoilkine-maticviscosity-temperaturedatatoplotasastraightline.ThechartsherepresentedprovideasignificantimprovementinlinearityoverthechartspreviouslyavailableunderMethodD341–43.Thisincreasesthereliabilityofextrapolationtohighertemperatures.1.3ThevaluesprovidedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareprovidedforinformationonly.2.ReferencedDocuments2.1ASTMStandards:2D445TestMethodforKinematicViscosityofTransparentandOpaqueLiquids(andCalculationofDynamicViscos-ity)2.2ASTMAdjuncts:3Viscosity-TemperatureCharts1–73.TechnicalHazard3.1Warning—Thechartsshouldbeusedonlyinthatrangeinwhichthehydrocarbonorpetroleumfluidsarehomogeneousliquids.Thesuggestedrangeisthusbetweenthecloudpointatlowtemperaturesandtheinitialboilingpointathighertem-peratures.Thechartsprovideimprovedlinearityinbothlowkinematicviscosityandattemperaturesupto340°C(approxi-mately650°F)orhigher.Somehigh-boilingpointmaterialscanshowasmalldeviationfromastraightlineaslowas280°C(approximately550°F),dependingontheindividualsampleoraccuracyofthedata.Reliabledatacanbeusefullyplottedinthehightemperatureregionevenifitdoesexhibitsomecurvature.Extrapolationsintosuchregionsfromlowertemperatureswilllackaccuracy,howe...
