Designation:D2161−10StandardPracticeforConversionofKinematicViscositytoSayboltUniversalViscosityortoSayboltFurolViscosity1ThisstandardisissuedunderthefixeddesignationD2161;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope*1.1Thispractice2coverstheconversiontablesandequa-tionsforconvertingkinematicviscosityinmm2/satanytemperaturetoSayboltUniversalviscosityinSayboltUniver-salseconds(SUS)atthesametemperatureandforconvertingkinematicviscosityinmm2/sat122and210°F(50and98.9°C)toSayboltFurolviscosityinSayboltFurolseconds(SFS)atthesametemperatures.Kinematicviscosityvaluesarebasedonwaterbeing1.0034mm2/s(cSt)at68°F(20°C).NOTE1—AfundamentalandpreferredmethodformeasuringkinematicviscosityisbyuseofkinematicviscometersasoutlinedinTestMethodD445.Itisrecommendedthatkinematicviscositybereportedinmillime-tressquaredpersecond,insteadofSayboltUniversalSeconds(SUS)orSayboltFurolSeconds(SFS).ThismethodisbeingretainedforthepurposeofcalculationofkinematicviscositiesfromSUSandSFSdatathatappearinpastliterature.Onemillimetresquaredpersecond(mm2/s)equalsonecentistoke(cSt),whichisanotherunitcommonlyfoundinolderliterature.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforreferenceinformationpurposesonly.TheSIunitofkinematicviscosityismm2/s.1.2.1Exception—Fahrenheittemperatureunitsareusedinthispracticebecausetheyareacceptedbyindustryforthetypeoflegacyconversionsdescribedinthispractice.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3D4...
