Designation:D6446–01Designation:355/98AnAmericanNationalStandardStandardTestMethodforEstimationofNetHeatofCombustion(SpecificEnergy)ofAviationFuels1ThisstandardisissuedunderthefixeddesignationD6446;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverstheestimationofthenetheatofcombustion(specificenergy)atconstantpressureinSIunits,megajoulesperkilogram,fromthefueldensity,sulfur,andhydrogencontent.1.2Thistestmethodispurelyempirical,anditisapplicableonlytoliquidhydrocarbonfuelsderivedbynormalrefiningprocessesfromconventionalcrudeoilthatconformtotherequirementsofspecificationsforaviationturbinefuelsoflimitedboilingrangesandcompositions,asdescribedinNote1andpermittedbyeachspecification.NOTE1—Theestimationoftheheatofcombustionofahydrocarbonfuelfromitshydrogencontent,density,andsulfurisjustifiableonlywhenthefuelbelongstoawell-definedclassforwhicharelationshipbetweenthesequantitieshasbeenderivedfromaccurateexperimentalmeasure-mentsonrepresentativesamplesofthatclass.Eveninthisclass,thepossibilitythattheestimatescanbeinerrorbylargeamountsforindividualfuelsshouldberecognized.Theclassesoffuelsusedtoestablishthecorreclationpresentedinthistestmethodarerepresentedbythefollowingspecifications:FuelSpecificationJP-5,Avcat/FSIIMIL-DTL-5624DEFSTAN91-86NATOCodeF-44JP-8,Avtur/FSIIMIL-DTL-83133DEFSTAN91–87NATOCodeF-34JetA,JetA-1,AvturSpecificationD1655DEFSTAN91-91NATOCodeF-35CAN/CGSB-3.231.3TheheatofcombustioncanalsobeestimatedbyTestMethodsD1405,D3338,andD4529.2.ReferencedDocuments2.1ASTMStandards:D129TestMethodforSulfurinPetroleumProducts(Gen-eralBombMethod)2D240TestMethodforHeatofCombustionofLiquidHydrocarbonFuelsbyBombCalorimeter2D1217TestMethodforDensityandRelativeDensity(SpecificGravity)ofLiquidsbyBinghamPycnometer2D1250GuideforPetroleumMeasurementT...
