1、Designation:D804921Standard Test Method forDetermining Concentration,Count,and Size Distribution ofSolid Particles and Water in Light and Middle DistillateFuels by Direct Imaging Analyzer1This standard is issued under the fixed designation D8049;the number immediately following the designation indic
2、ates 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 uses a direct imaging analyzer t
3、o countand measure the size and shape of dispersed solid particles andwater droplets in light and middle distillate fuels in the overallrange from 4 m to 100 m and in size bands of 4 m,6 m,and 14 m.NOTE1Particle size data from 0.7 m through 300 m is available foruse or reporting if deemed helpful.NO
4、TE2Shape is used to classify particles,droplets,and bubbles andis not a reporting requirement.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,asso
5、ciated 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 recog
6、nized 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:2D2276 Test Method for Par
7、ticulate Contaminant in AviationFuel by Line SamplingD3240 Test Method for Undissolved Water In AviationTurbine FuelsD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4175 Terminology Relating to Petroleum Products,LiquidFuels,and LubricantsD4177 Practice for Automatic Sampling o
8、f Petroleum andPetroleum ProductsD4306 Practice for Aviation Fuel Sample Containers forTests Affected by Trace ContaminationF658 Practice for Calibration of a Liquid-Borne ParticleCounter Using an Optical System Based Upon LightExtinction(Withdrawn 2007)32.2 ISO Standard:4ISO 11171 Hydraulic Fluid P
9、owerCalibration of Auto-matic Particle Counters for LiquidsISO 12103-1 Road VehiclesTest Contaminants for FilterEvaluationPart 1:Arizona Test DustSRM 2806(ISO Medium Test Dust in Hydraulic Oil):AParticle-contamination Standard Reference Material forthe Fluid Power Industry2.3 MIL Standard:5MIL-PRF-5
10、606 Hydraulic Fluid,Petroleum Base;Aircraft,Missile and Ordinance3.Terminology3.1 For definitions of terms used in this standard,refer toTerminology D4175.3.2 Definitions of Terms Specific to This Standard:3.2.1 air bubble,nnon-fuel,gaseous formations withinthe fuel,generally spherical in shape and
11、visible as a heavywall ring due to the diffraction of light around and throughthem.3.2.2 droplet,nnon-fuel liquid formations within the fuel,generally spherical in shape and visible as a thin wall ring dueto the diffraction of light around and through them.1This test method is under the jurisdiction
12、 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 May 1,2021.Published June 2021.Originallyapproved in 2016.Last previous edition approved
13、in 2019 as D8049 19a.DOI:10.1520/D8049-21.2For 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.3The last approved versi
14、on of this historical standard is referenced onwww.astm.org.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.5For referenced MIL standards,visit the Defense Logistics Agency,DocumentServices website at http:/quicksearch.dla.mil*
15、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 establishe
16、d 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.13.2.3 major particle diameter m,nthe maximum two-dimensional length of the particle measured.3.2.4 minor particle diameter m,nthe maximum two-dimensional length of the particle measured perpendicular tothe major particle diameter.3.2.5 particle,nnon-liquid,non-gaseous,solid objects inthe fuel.3.2.6 projected equ
