Designation:D88/D88M−07(Reapproved2019)´1AmericanAssociationStateHighwayandTransportationOfficialsStandardAASHTONo:T72Method304—FederalTestMethodStandardNo.791bReplacesMethod4285ofFederalTestMethodStandardNo.141AStandardTestMethodforSayboltViscosity1ThisstandardisissuedunderthefixeddesignationD88/D88M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.ε1NOTE—UnitsinformationwaseditoriallycorrectedinMay2019.1.Scope1.1ThistestmethodcoverstheempiricalproceduresfordeterminingtheSayboltUniversalorSayboltFurolviscositiesofpetroleumproductsatspecifiedtemperaturesbetween21and99°C[70and210°F].Aspecialprocedureforwaxyproductsisindicated.NOTE1—TestMethodsD445andD2170/D2170Marepreferredforthedeterminationofkinematicviscosity.Theyrequiresmallersamplesandlesstime,andprovidegreateraccuracy.KinematicviscositiesmaybeconvertedtoSayboltviscositiesbyuseofthetablesinPracticeD2161.ItisrecommendedthatviscosityindexesbecalculatedfromkinematicratherthanSayboltviscosities.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemarenotnecessarilyexactequivalents;therefore,toensureconformancewiththestandard,eachsystemshallbeusedindependentlyoftheother,andvaluesfromthetwosystemsshallnotbecombined.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendatio...
