Designation:D92−18AmericanAssociationStateHighwayandTransportationOfficialsStandardAASHTONo.:T48DIN51376StandardTestMethodforFlashandFirePointsbyClevelandOpenCupTester1ThisstandardisissuedunderthefixeddesignationD92;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.INTRODUCTIONThisflashpointandfirepointtestmethodisadynamicmethodanddependsondefiniteratesoftemperatureincreasestocontroltheprecisionofthetestmethod.Itsprimaryuseisforviscousmaterialshavingflashpointof79°C(175°F)andabove.Itisalsousedtodeterminefirepoint,whichisatemperatureabovetheflashpoint,atwhichthetestspecimenwillsupportcombustionforaminimumof5s.DonotconfusethistestmethodwithTestMethodD4206,whichisasustainedburningtest,opencuptype,ataspecifictemperatureof49°C(120°F).Flashpointvaluesareafunctionoftheapparatusdesign,theconditionoftheapparatusused,andtheoperationalprocedurecarriedout.Flashpointcanthereforeonlybedefinedintermsofastandardtestmethod,andnogeneralvalidcorrelationcanbeguaranteedbetweenresultsobtainedbydifferenttestmethods,orwithtestapparatusdifferentfromthatspecified.1.Scope*1.1ThistestmethoddescribesthedeterminationoftheflashpointandfirepointofpetroleumproductsbyamanualClevelandopencupapparatusoranautomatedClevelandopencupapparatus.NOTE1—Theprecisionsforfirepointwerenotdeterminedinthecurrentinterlaboratoryprogram.Firepointisaparameterthatisnotcommonlyspecified,althoughinsomecases,knowledgeofthisflamma-bilitytemperaturemaybedesired.1.2Thistestmethodisapplicabletoallpetroleumproductswithflashpointsabove79°C(175°F)andbelow400°C(752°F)exceptfueloils.NOTE2—Thistestmethodmayoccasionallybespecifiedforthedeterminationofthefirepointofafueloil.Forthedeterminationoftheflashpointsoffueloils,useTestMethodD93.TestMethodD...
