1、Designation:D745121Standard Test Method forWater Separation Properties of Light and Middle Distillate,and Compression and Spark-Ignition Engine Fuels1This standard is issued under the fixed designation D7451;the number immediately following the designation indicates the year oforiginal adoption or,i
2、n 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 test method covers the evaluation of the tendencyof water and fuels with a final b
3、oiling point of less than 390 C,as measured in Test Method D86,to separate cleanly ratherthan create emulsions when they may contain potential emul-sion forming additives or components,or have been additizedwith potential emulsion forming additives,or components.1.2 This test method applies primaril
4、y to gasoline,diesel,kerosine,and distillate grades of gas turbine,marine,homeheating oils and furnace fuels(see Specifications D396,D975,D2880,D3699,D4814,and D6985).For fuel components suchas biodiesel or alcohol,refer to X1.2 and X1.3.1.3 This test method is not meant to certify or qualify fuelsf
5、or sale,but it is intended for use by additive suppliers todetermine the need for demulsifier components in their additivepackages.1.4 This test method is not meant for testing of fuelscontaining large amounts of aqueous soluble components,suchas E85,or for testing of water emulsified fuels,or for t
6、esting ofaviation fuels.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 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 standa
7、rd to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Pr
8、inciples 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:2D86 Test Method for Distillation of Petroleum Products andLiquid Fuels at Atmospheric PressureD
9、396 Specification for Fuel OilsD975 Specification for Diesel FuelD1193 Specification for Reagent WaterD2274 Test Method for Oxidation Stability of Distillate FuelOil(Accelerated Method)D2880 Specification for Gas Turbine Fuel OilsD3699 Specification for KerosineD4057 Practice for Manual Sampling of
10、Petroleum andPetroleum ProductsD4175 Terminology Relating to Petroleum Products,LiquidFuels,and LubricantsD4176 Test Method for Free Water and Particulate Contami-nation in Distillate Fuels(Visual Inspection Procedures)D4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD4814 Spe
11、cification for Automotive Spark-Ignition EngineFuelD6985 Specification for Middle Distillate Fuel OilMilitary Marine Applications(Withdrawn 2010)32.2 ASTM Adjuncts:Distillate Fuel Bar Chart4Fuel Clarity Rating Standard(physical or digitalversions)5,63.Terminology3.1 Definitions:1This test method is
12、under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.14 on Stability,Cleanliness and Compatibility of Liquid Fuels.Current edition approved Oct.1,2021.Published October 2021.Originallyapproved in 2008.Last p
13、revious edition approved in 2020 as D7451 20.DOI:10.1520/D7451-21.2For 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.
14、3The last approved version of this historical standard is referenced onwww.astm.org.4Available from ASTM International Headquarters.Order Adjunct No.ADJD417601.Original adjunct produced in 1991.5Available from ASTM International Headquarters.Order Adjunct No.ADJD7451.Original adjunct produced in 200
15、8.6Available from ASTM International Headquarters.Order Adjunct No.ADJD7451-E-PDF.Original adjunct produced in 2019.*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 intern
16、ational 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.13.1.1 For definitions of terms used in this test method,referto Terminology D4175.3.1.2 film,nthin,translucent layer that does not adhere tothe wall of the glass test tube.3.1.3 heavy scum,nassess
