ASTM_D_3338_-_D_3338M_-_20a.pdf

Designation:D3338/D3338M20aStandard Test Method forEstimation of Net Heat of Combustion of Aviation Fuels1This standard is issued under the fixed designation D3338/D3338M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers the estimation of the net heat ofcombustion(megajoules per kilogram or Btu per pound)ofaviation gasolines and aircraft turbine and jet engine fuels inthe range from 40.19 MJ kg to 44.73 MJ kg or 17 280 Btu lbto 19 230 Btulb.The precision for estimation of the net heatof combustion outside this range has not been determined forthis test method.1.2 This test method is purely empirical and is applicable toliquid hydrocarbon fuels that conform to the specifications foraviation gasolines or aircraft turbine and jet engine fuels ofgrades Jet A,Jet A-1,Jet B,JP-4,JP-5,JP-7,and JP-8.NOTE1The experimental data on heat of combustion from which theTest Method D3338 correlation was devised was obtained by a precisionmethod similar to Test Method D4809.NOTE2The estimation of the net heat of combustion of a hydrocarbonfuel is justifiable only when the fuel belongs to a well-defined class forwhich a relation between heat of combustion and aromatic and sulfurcontents,density,and distillation range of the fuel has been derived fromaccurate experimental measurements on representative samples of thatclass.Even in this case,the possibility that the estimates may be in errorby large amounts for individual fuels should be recognized.The fuels usedto establish the correlation presented in this method are defined as follows:Fuels:Aviation gasolineGrades 100/130 and 115/145(1,2)2Kerosenes,alkylates,and special WADC fuels(3)Pure hydrocarbonsparaffins,naphthenes,and aromatics(4)Fuels for which data were reported by the Coordinating ResearchCouncil(5).NOTE3The property ranges used in this correlation are as follows:Aromaticsfrom 0%by mass to 100%by massAPI Gravityfrom 25.7 to 81.2APIVolatilityfrom 160 F to 540 F,average boiling point1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.3.1 Although the test method permits the calculation ofnet heat of combustion in either SI or inch-pound units,SI unitsare the preferred units.1.3.2 The net heat of combustion can also be estimated ininch-pound units by Test Method D1405 or in SI units by TestMethod D4529.Test Method D1405 requires calculation of oneof four equations dependent on the fuel type with a precisionequivalent to that of this test method.Test Method D4529requires calculation of a single equation for all aviation fuelswith a precision equivalent to that of this test method.UnlikeTest Method D1405 and D4529,Test Method D3338/D3338Mdoes not require the use of aniline point.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D86 Test Method for Distillation of Petroleum Products andLiquid Fuels at Atmospheric PressureD240 Test Method for Heat of Combustion of Liquid Hy-drocarbon Fuels by Bomb CalorimeterD1266 Test Method for Sulfur in Petroleum Products(LampMethod)D1298 Test Method for Density,Relative Density,or APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Hydrometer Method1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.05 on Properties of Fuels,Petroleum Coke and Carbon Material.Current edition approved Dec.1,2020.Published December 2020.Originallyapproved in 1974.Last previous edition approved in 2020 as D3338/D3338M 20.DOI:10.1520/D3338_D3338M-20A.2The boldface numbers in parentheses refer to a list of references at the end ofthis standard.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the st