1、Designation:D750118aStandard Test Method forDetermination of Fuel Filter Blocking Potential of Biodiesel(B100)Blend Stock by Cold Soak Filtration Test(CSFT)1This standard is issued under the fixed designation D7501;the number immediately following the designation indicates the year oforiginal adopti
2、on 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 test method covers the determination by filtrationtime after cold soak of t
3、he suitability for a biodiesel(B100)blend stock that meets all other requirements of SpecificationD6751 and has a cloud point below 20 C(68 F)to provideadequate low temperature operability performance to at leastthe cloud point of the finished blend.1.2 The formal precision of this test method is in
4、cluded in13.1 on Precision.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 sta
5、ndard 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
6、 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:2D4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD6217 Test Method for P
7、articulate Contamination in MiddleDistillate Fuels by Laboratory FiltrationD6300 Practice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Products andLubricantsD6751 Specification for Biodiesel Fuel Blend Stock(B100)for Middle Distillate Fuels3.Terminology3.1 Defini
8、tions:3.1.1 biodiesel,nfuel comprised of mono-alkyl esters oflong chain fatty acids derived from vegetable oils or animalfats,designated as B100.3.1.2 bond,vto connect two parts of a system electricallyby means of a conductive wire to eliminate voltage differences.3.1.3 BXX blend,nfuel blend consist
9、ing of up to 20volume percent biodiesel designated as up to B20 conformingto the requirements of Specification D6751 with the remainderbeing a light middle or middle distillate grade diesel fuel andmeeting the requirements of this test method.3.1.3.1 DiscussionThe abbreviation BXX represents aspecif
10、ic blend concentration in the range B2 to B20,where XXis the percent volume of biodiesel in the fuel blend.3.2 Definitions of Terms Specific to This Standard:3.2.1 air chamber,nunit to control temperature of samplefor cooling with maximum 0.5 C variation from set point.Theunit shall use a microproce
11、ssor temperature controller withdigital set point and readout.Afood-grade refrigerator does notprovide adequate temperature stability for this test method.3.2.2 minor component,nmaterial present in B100,typi-cally at concentrations well below 1%by mass.3.2.3 thermal history,nrange of temperatures th
12、at a batchor sample of B100 has experienced which can result inseparation or precipitation of minor components.3.2.3.1 DiscussionCooling some biodiesel fuels can resultin precipitation or separation of minor components that havelimited solubility in B100.Heating these biodiesel fuels above40 C is be
13、lieved to redissolve most of these minor compo-nents and thus erase the thermal history of the sample.3.3 Abbreviations:3.3.1 CSFTCold Soak Filtration Test1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibili
14、ty ofSubcommittee D02.14 on Stability,Cleanliness and Compatibility of Liquid Fuels.Current edition approved Oct.15,2018.Published November 2018.Originallyapproved in 2009.Last previous edition approved in 2018 as D7501 18.DOI:10.1520/D7501-18A.2For referenced ASTM standards,visit the ASTM website,w
15、ww.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,PO Bo
16、x 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.1 4.Summary of Test Method4.1 In this test method,300 mLof biodiesel(B100)is storedat 4.5 C 6 0.5 C(40 F 6 1 F)for 16 h,allowed to war
