1、Designation:D838621Standard Test Method forDetermining Enhanced Filter Blocking Tendency(EFBT)1This standard is issued under the fixed designation D8386;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A numb
2、er in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONThis test method is based on Test Method D2068 and uses a filter media which is more sensitiveto blocking by contaminants in fuels than the fi
3、lter specified in Test Method D2068 Procedure A andB.The result of this test method is dependent on the mandated filter material,as well as the proceduralsteps of this method.If a specification requires a specific Dxxxx procedure,do not substitute adifferent procedure or filter without agreement fro
4、m the specifier.1.Scope1.1 This test method covers a procedure for the determina-tion of the Enhanced Filter Blocking Tendency(EFBT)and thefilterability of middle distillate fuel oils.This test is applicableto fuels within the viscosity range of 1.3 mm2/s to 6.0 mm2/s at40 C.NOTE1ASTM specification
5、fuels falling within the scope of this testmethod are:Specification D396 Grades No 1 and 2;Specification D975Grades No.1-D S15 and S500,and No.2-D S15 and S500;SpecificationD2880 Grades No.1-GT and No.2-GT.1.2 This test method has interim repeatability only.Formore information,see Section 12.1.3 Thi
6、s test method is not applicable to fuels that containfree(undissolved)water(see 7.3).1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated wi
7、th 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.1.6 This international standard was developed in accor-dance with internationally recognized pri
8、nciples 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:2D396 Specification for Fuel OilsD9
9、75 Specification for Diesel FuelD2068 Test Method for Determining Filter Blocking Ten-dencyD2880 Specification for Gas Turbine Fuel OilsD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4175 Terminology Relating to Petroleum Products,LiquidFuels,and LubricantsD4176 Test Method fo
10、r Free Water and Particulate Contami-nation in Distillate Fuels(Visual Inspection Procedures)D4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD4860 Test Method for Free Water and Particulate Contami-nation in Middle Distillate Fuels(Clear and Bright Nu-merical Rating)D6300 Pra
11、ctice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Products,Liquid Fuels,and Lubricants2.2 ASTM Manuals:3ASTM MNL 12.3 ASTM Adjuncts:D2PP,Determination of Precision and Bias Data for Use inTest Methods for Petroleum Products41This test method is under the jurisdi
12、ction 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 April 1,2021.Published May 2021.DOI:10.1520/D8386-21.2For referenced ASTM standards,
13、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.3MNL 1,Manual on Significance of Tests for Petroleum Products,9th Edition,ASTM International,West
14、 Conshohocken,2018.4This adjunct has been withdrawn and is no longer available.Copyright 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 standardiza
15、tion 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.3.Terminology3.1 For definitions of terms used in this standard,seeTerminology D4175.3.2 Definition
16、s of Terms Specific to This Standard:3.2.1 enhanced filter blocking tendency(EFBT),nof fuelsdescribed in 1.1,a calculated dimensionless value that definesthe tendency of contaminants in the fuel to plug or block thefilter media specified in this test procedure.3.2.1.1 DiscussionThe value is calculated using the pres-sure across the filter or the volume of fuel filtered at the end ofthe test.Depending on the outcome of the test,one of twoequations is applied.See Section 10,Calculation.See 5.6 for
