ASTM_D_7901_-_20.pdf

Designation:D790120Standard Specification forDimethyl Ether for Fuel Purposes1This standard is issued under the fixed designation D7901;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,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 dimethyl ether(DME)for useas a fuel in engines specifically designed or modified for DMEand for blending with liquefied petroleum gas(LPG).Thisspecification is for use by manufacturers of dimethyl ether,byengine developers of purpose-built engines,in contracts for thepurchase of DME for fuel purposes,and for the guidance ofconsumers of this type of fuel.NOTE1The generation and dissipation of static electricity can createproblems in the handling of DME.For more information on the subject,see Guide D4865.1.2 The values stated in SI units are to be regarded asstandard.Units in parentheses are for information only.1.3 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.1.4 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:2D1265 Practice for Sampling Liquefied Petroleum(LP)Gases,Manual MethodD1267 Test Method for Gauge Vapor Pressure of LiquefiedPetroleum(LP)Gases(LP-Gas Method)D1838 Test Method for Copper Strip Corrosion by LiquefiedPetroleum(LP)GasesD2158 Test Method for Residues in Liquefied Petroleum(LP)GasesD2163 Test Method for Determination of Hydrocarbons inLiquefied Petroleum(LP)Gases and Propane/PropeneMixtures by Gas ChromatographyD3700 Practice for Obtaining LPG Samples Using a Float-ing Piston CylinderD4865 Guide for Generation and Dissipation of Static Elec-tricity in Petroleum Fuel SystemsD6667 Test Method for Determination of Total VolatileSulfur in Gaseous Hydrocarbons and Liquefied PetroleumGases by Ultraviolet FluorescenceD6897 Test Method for Vapor Pressure of Liquefied Petro-leum Gases(LPG)(Expansion Method)D7756 Test Method for Residues in Liquefied Petroleum(LP)Gases by Gas Chromatography with Liquid,On-Column InjectionD7828 Test Method for Determination of Residue Compo-sition in Liquefied Petroleum Gas(LPG)Using Auto-mated Thermal Desorption/Gas Chromatography(ATD/GC)2.2 Other Documents:NFPA 77 Recommended Practice on Static Electricity3ISO/DIS17196 Dimethylether(DME)forfuelsDetermination of impuritiesGas chromatographicmethod4ISO 17197 Dimethyl ether(DME)for fuelsDeterminationof water contentKarl Fischer titration method43.Terminology3.1 Abbreviations:3.1.1 DMEdimethyl ether,the chemical compound(CH3OCH3).3.1.2 LPGliquefied petroleum gas.4.Hazards4.1 WarningDimethyl ether is a highly flammable,color-less gas with a faint ether-like odor.It is shipped and stored ina pressurized,liquefied state,much like LPG.Unlike LPG,1This specification is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.H0 on Liquefied Petroleum Gas.Current edition approved June 1,2020.Published July 2020.Originally approvedin 2014.Last previous edition approved in 2014 as D7901 14b.DOI:10.1520/D7901-20.2For 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 standards Document Summary page onthe ASTM website.3Available from National Fire Protection Association(NFPA),1 BatterymarchPark,Quincy,MA 02169-7471,http:/www.nfpa.org.4Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,CP 56,CH-1211 Geneva 20,Switzerland,http:/www.iso.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO 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.dimethyl ether has a wide flammability range and a lowautoignition temperature.Further,dimethyl ether in this speci-fication is intended for use in a diesel(compression-ignition)engine.Many users of diesel engines are familiar with therelative safety of storing and