Designation:D7170−14StandardTestMethodforDeterminationofDerivedCetaneNumber(DCN)ofDieselFuelOils—FixedRangeInjectionPeriod,ConstantVolumeCombustionChamberMethod1ThisstandardisissuedunderthefixeddesignationD7170;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthequantitativedeterminationoftheignitioncharacteristicsofconventionaldieselfueloils,dieselfueloilscontainingcetanenumberimproveradditives,andisapplicabletoproductstypicalofSpecificationD975,GradesNo.1-Dand2-Dregularandlow-sulfurdieselfueloils,EuropeanstandardEN590,andCanadianstandardsCAN/CGSB-3.517-2000andCAN/CGSB3.6-2000.Thetestmethodmayalsobeappliedtothequantitativedeterminationoftheignitioncharacteristicsofblendsoffueloilscontainingbio-dieselmaterial,anddieselfueloilblendingcomponents.1.2Thistestmethodmeasurestheignitiondelayandutilizesaconstantvolumecombustionchamberwithdirectfuelinjec-tionintoheated,compressedair.Anequationconvertsanignitiondelaydeterminationtoaderivedcetanenumber(DCN).1.3Thistestmethodcoverstheignitiondelayrangefromaminimumvalueof35.0DCN(ignitiondelayof4.89ms)toamaximumvalueof59.6DCN(ignitiondelayof2.87ms).TheaverageDCNresultforeachsampleintheILSrangedfrom37.29(averageignitiondelayof4.5894ms)to56.517(averageignitiondelayof3.0281ms).1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D613TestMethodforCetaneNumberofDieselFuelOilD975SpecificationforDieselFuelOilsD1193SpecificationforReagentWaterD4057PracticeforManualSampling...
