1、Designation:D732118aStandard Test Method forParticulate Contamination of Biodiesel B100 Blend StockBiodiesel Esters and Biodiesel Blends by LaboratoryFiltration1This standard is issued under the fixed designation D7321;the number immediately following the designation indicates the year oforiginal ad
2、option 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 of the mass ofparticulate contamin
3、ation in B100 biodiesel in accordance withSpecification D6751 and BXX blends that are prepared againstall No.1 and No.2 grade fuels allowed within SpecificationsD396 and D975.NOTE1Middle distillate fuels with flash points less than 38 C havebeen ignited by discharges of static electricity when the f
4、uels have beenfiltered through inadequately bonded or grounded glass fiber filtersystems.See Guide D4865 for a more detailed discussion of staticelectricity formation and discharge.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstand
5、ard.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.
6、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
7、Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D396 Specification for Fuel OilsD975 Specification for Diesel Fuel OilsD1193 Specification for Reagent WaterD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4865 Guide for Generation and Dissipation of Static Elec-tri
8、city in Petroleum Fuel SystemsD6751 Specification for Biodiesel Fuel Blend Stock(B100)for Middle Distillate Fuels3.Terminology3.1 Definitions:3.1.1 biodiesel,nfuel comprised of mono-alkyl esters oflong chain fatty acids derived from vegetable oils or animalfats,designated B100.3.1.2 biodiesel blend,
9、BXX,na fuel composed of biodieselblendstock with hydrocarbon-based diesel fuel.3.1.3 bond,vto connect two parts of a system electricallyby means of a conductive wire to eliminate voltage differences.3.2 Definitions of Terms Specific to This Standard:3.2.1 filtered flushing fluids,nany of three solve
10、nts,methanol,propan-2-ol(isopropanol),or2,2,4-trimethylpentane,filtered through a nominal 0.45 m filter.3.2.2 glass fiber filter,nglass fiber filter used in this testmethod.4.Summary of Test Method4.1 B100 Biodiesel Blend Stock Filtration:4.1.1 Ameasured volume of 400 mL to 450 mL of biodieselester(
11、B100)is vacuum filtered through one 0.7 m glass fiberfilter.If upon visual inspection particulate contamination isobserved,this may result in a high filtration time.In such cases,when the contamination is high or of a nature that induces slowfiltration rates,two or more filtrations using a fresh fil
12、ter eachtime may be required to complete filtration in a reasonabletime.4.1.2 After the filtration has been completed,the filter iswashed with solvent,dried,and weighed.The particulatecontamination level is determined by the mass gained by theglass fiber filter,and is reported in units of grams per
13、cubicmetre or its equivalent in milligrams per litre.4.2 BXX Biodiesel Blend Filtration:1This test method is 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
14、 of Liquid Fuels.Current edition approved Oct.1,2018.Published October 2018.Originallyapproved in 2008.Last previous edition approved in 2018 as D7321 18.DOI:10.1520/D7321-18A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For An
15、nual 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 Box C700,West Conshohocken,PA 19428-2959.United StatesThis internationa
16、l 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 4.2.1 Ameasured volume of 800 mL to 900 mL of biodieselblend(BXX)is vacuum filtered through one 0.7 m glass fiberfilter.If upon visual inspection particulate contamination isobserved,this may result in
