Designation:D7215−08(Reapproved2013)StandardTestMethodforCalculatedFlashPointfromSimulatedDistillationAnalysisofDistillateFuels1ThisstandardisissuedunderthefixeddesignationD7215;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthecalculatedflashpointformula,whichrepresentsameansfordirectlyestimatingtheflashpointtemperatureofdistillatefuelsfromTestMethodD2887data.Thevaluecomputedfromtheequationistermedthe“calculatedflashpoint.”ThecalculatedflashpointformulaisapplicabletodieselfuelsamplesbasedonacorrelationtoTestMethodD93overtherangefrom47to99°C,andtojetfuelsamplesbasedonacorrelationtoTestMethodD56andTestMethodD3828overtherangefrom35to67°C.1.2ThecalculatedflashpointformulaisvalidfordieselandjetfuelswithanIBPbetween90and162°C(194and324°F),TestMethodD28875%recoverytemperaturebetween136and207°C(277and405°F),andTestMethodD288710%recoverytemperaturebetween142and222°C(288and432°F).Foreachflashpointtestmethod(TestMethodD56,TestMethodD93,andTestMethodD3828)aseparateequationhasbeenestab-lished.See4.4foradetailedoverviewofthesimulateddistillationIBP,5%,and10%rangesperequation.1.3Acalculateddiagnosticparameter,notexceedingagiventhresholdvalue,isaprerequisiteforacceptanceofthecalculatedflashpoint.1.4ThediagnosticparameterMSPEX(MeanSummedPredictionError)checksthesamplecompliance,basedonreconstructionofTIBP,T5%,andT10%ofthesample,viaacalculationprocedure.AvalueforMSPEXnotexceedingthethresholdlevelof1.9°Cisaprerequisiteforacceptingthecalculatedflashpoint,CFP.NOTE1—Itisimportanttonotethatcalculatedflashpointresults,atthistime,arenotrecognizedbyregulatoryorganizationsinverifyingconfor-mancetoapplicableregulations.NOTE2—ThecalculatedflashpointderivedfromsimulateddistillationdatadependsupontheaccuracyofdeterminationoftheIBPtemperaturean...
