Designation:D5972−16Designation:435/15StandardTestMethodforFreezingPointofAviationFuels(AutomaticPhaseTransitionMethod)1ThisstandardisissuedunderthefixeddesignationD5972;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversthedeterminationofthetem-peraturebelowwhichsolidhydrocarboncrystalsforminaviationturbinefuels.1.2Thistestmethodisdesignedtocoverthetemperaturerangeof−80°Cto20°C;however,2003JointASTM/IPInterlaboratoryCooperativeTestProgrammentionedin12.4hasonlydemonstratedthetestmethodwithfuelshavingfreezingpointsintherangeof−42°Cto−60°C.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecificwarningstatements,see7.1,7.3,and7.5.2.ReferencedDocuments2.1ASTMStandards:2D2386TestMethodforFreezingPointofAviationFuels3.Terminology3.1Definitions:3.1.1freezingpoint,n—inaviationfuels,thefueltempera-tureatwhichsolidhydrocarboncrystals,formedoncooling,disappearwhenthetemperatureofthefuelisallowedtoriseunderspecifiedconditionsoftest.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1automaticphasetransitionmethod,n—inthistestmethod,theproceduresofautomaticallycoolingaliquidaviationfuelspecimenuntilsolidhydrocarboncrystalsappear,followedbycontrolledwarmingandrecordingofthetempera-tureatwhichthesolidhydrocarboncrystalscompletelyredis-solveintotheliquidphase.3.2.2Peltierdevice,n—asolid-statethermoelectricdeviceconstructedwithdissimilarsemiconductormaterials,config-uredin...
