ASTM_D_7321_-_14.pdf

Designation:D732114Standard Test Method forTest Method for Particulate Contamination of Biodiesel B100Blend Stock Biodiesel Esters and Biodiesel Blends byLaboratory Filtration1This 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 and health practices and determine the applica-bility of regulatory limitations prior to use.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-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,nblend of biodiesel fuel withpetroleum based biodiesel fuel.3.1.3 bond,vto connect two parts of a system electricallyby means of a conductive wire to eliminate voltage differences.3.1.4 ground,vto connect electrically with earth.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 about 400 mLof biodiesel ester(B100)is vacuum filtered through one 0.7 m glass fiber filter.When the contamination is high or of a nature that inducesslow filtration rates,two or more filtrations using a fresh filtereach time 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 cubicmetre or its equivalent in milligrams per litre.4.2 BXX Biodiesel Blend Filtration:4.2.1 A measured volume of about 800 mL of biodieselblend(BXX)is vacuum filtered through one 0.7 m glass fiberfilter.When the contamination is high or of a nature thatinduces slow filtration rates,two or more filtrations using afresh filter each time may be required to complete filtration ina reasonable time.4.2.2 After the filtration has been completed,the filter iswashed with solvent,dried,and weighed.The particulate1This 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 and Cleanliness of Liquid Fuels.Current edition approved June 1,2014.Published July 2014.Originally approvedin 2008.Last previous edition approved in 2011 as D7321 111.DOI:10.1520/D7321-14.2For 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 States1 contamination level is determined by the mass gained from theglass fiber filter,and is reported in units of grams per cubicmetre or its equivalent in milligrams per litre.5.Significance and Use5.1 The mass of particulates present in a fuel is a significantfactor,along with the size and nature of the individualparticles,in the rapidity with which fuel system filters andother small orifices in fuel systems can become plugged.Thistest method provides a means of assessing the mass ofparticulates present in a fuel s