1、Designation:D579721Standard Specification forMethanol Fuel Blends(M51M85)for Methanol-CapableAutomotive Spark-Ignition Engines1This standard is issued under the fixed designation D5797;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,
2、the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers the requirements for automo-tive fuel blends of methanol and gasoline for use in gro
3、undvehicles equipped with methanol-capable flexible-fuel,anddedicated methanol spark-ignition engines.Fuel produced tothis specification contains 51%to 85%by volume methanol.This fuel is sometimes referred to at retail as“M85.”AppendixX1 discusses the significance of the properties specified.Appendi
4、x X2 presents the current status in the development ofa luminosity test procedure(flame visibility)for methanol fuelblends(M51M85).1.2 The vapor pressure of methanol fuel blends is varied forseasonal climatic changes.Vapor pressure is increased at lowertemperatures to ensure adequate vehicle operabi
5、lity and safety.Methanol content and selection of gasoline blendstocks areadjusted by the blender to meet these vapor pressure require-ments.1.3 The United States government has established variousprograms for alternative fuels.Many of the definitions ofalternative fuel used by these programs can be
6、 more or lessrestrictive than the requirements of this specification.SeeAnnex A1 for additional information on alternative fuelscontaining methanol.1.4 The values stated in SI units are to be regarded as thestandard.1.4.1 ExceptionNon-SI units are provided for informationonly.In most cases,U.S.feder
7、al regulations specify non-SIunits.1.5 The following precautionary caveat pertains only to thetest method portionsAppendix X2 of this specification.Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard
8、to establish appropriate safety,health,andenvironmental practices and determine the applicability ofregulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principle
9、s 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:2,3D86 Test Method for Distillation of Petroleum Products andLiquid Fuels at Atmospheric PressureD130 T
10、est Method for Corrosiveness to Copper from Petro-leum Products by Copper Strip TestD381 Test Method for Gum Content in Fuels by Jet Evapo-rationD525 Test Method for Oxidation Stability of Gasoline(In-duction Period Method)D1193 Specification for Reagent WaterD1266 Test Method for Sulfur in Petroleu
11、m Products(LampMethod)D1613 Test Method for Acidity in Volatile Solvents andChemical Intermediates Used in Paint,Varnish,Lacquer,and Related ProductsD3231 Test Method for Phosphorus in GasolineD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4175 Terminology Relating to Petroleu
12、m Products,LiquidFuels,and LubricantsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD4306 Practice for Aviation Fuel Sample Containers forTests Affected by Trace ContaminationD4806 Specification for Denatured Fuel Ethanol for Blend-ing with Gasolines for Use as Automotive Sp
13、ark-IgnitionEngine FuelD4814 Specification for Automotive Spark-Ignition EngineFuel1This specification is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is under the direct responsi-bility of Subcommittee D02.A0.02 on Oxygenated Fuels and Components
14、.Current edition approved Oct.1,2021.Published October 2021.Originallyapproved in 1995.Last previous edition approved in 2018 as D5797 18.DOI:10.1520/D5797-21.2Reference to the following documents is to be the latest issue unless otherwisespecified.3For referenced ASTM standards,visit the ASTM websi
15、te,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,P
16、O Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1D4953 Test Method for Vapor Pressure of Gasoline andGasoline-Oxygenate Blends(Dry Method)D5059 Test Methods for Lead and Manganes
