Designation:D4871−11(Reapproved2022)StandardGuideforUniversalOxidation/ThermalStabilityTestApparatus1ThisstandardisissuedunderthefixeddesignationD4871;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidecoversanapparatususedtomeasuretheoxidationorthermalstabilityofliquidsbysubjectingthemtotemperaturesintherangefrom50°Cto375°Cinthepresenceofair,oxygen,nitrogen,orothergasesatflowratesof1.5L⁄hto13L⁄h,orintheabsenceofgasflow.Stabilitymaybemeasuredinthepresenceorabsenceofwaterorsolubleorinsolublecatalysts.Gasesevolvedmaybeallowedtoescape,condensedandcollected,orcondensedandreturnedtothetestcell.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D91TestMethodforPrecipitationNumberofLubricatingOilsD156TestMethodforSayboltColorofPetroleumProducts(SayboltChromometerMethod)D445TestMethodforKinematicViscosityofTransparentandOpaqueLiquids(andCalculationofDynamicViscos-ity)D664TestMethodforAcidNumberofPetroleumProductsbyPotentiometricTitrationD974TestMethodforAcidandBaseNumberbyColor-IndicatorTitrationD1500TestMethodforASTMColorofPetroleumProducts(ASTMColorScale)D3339TestMethodforAcidNumberofPetroleumProductsbySemi-MicroColorIndi...
