ASTM_D_7321_-_21.pdf

Designation:D732121Standard 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 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 test method covers the determination of the mass ofparticulate contamination 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 fuels 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 thisstandard.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:2D396 Specification for Fuel OilsD975 Specification for Diesel FuelD1193 Specification for Reagent WaterD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4865 Guide for Generation and Dissipation of Static Elec-tricity 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,BXX,na homogeneous mixture ofhydrocarbon oils and mono-alkyl esters of long chain fattyacids.3.1.2.1 DiscussionIn the abbreviation BXX,the XX rep-resents the volume percentage of biodiesel fuel in the blend.3.1.2.2 DiscussionThe mono-alkyl esters of long chainfatty acids(that is,biodiesel)used in the mixture shall meet therequirements of Specification D6751.3.1.2.3 DiscussionDiesel fuel,fuel oil,and non-aviationgas turbine oil are examples of hydrocarbon oils.3.1.2.4 DiscussionB0 is synonymous with a hydrocarbonoil to which no biodiesel has been added.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 solvents,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(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 slow1This 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 of Liquid Fuels.Current edition approved Oct.15,2021.Published November 2021.Originallyapproved in 2008.Last previous edition approved in 2018 as D7321 18a.DOI:10.1520/D7321-21.2For 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.*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.1?filtration rates,two or more filtrations using a fresh filter eachtime may be required to complete filtration in a reasonabletime.4.1.2 After the filtration has been comple