ASTM_D_613_-_18ae1.pdf

Designation:D61318a1Standard Test Method forCetane Number of Diesel Fuel Oil1This standard is issued under the fixed designation D613;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1NOTEIP logo removed in January 2021 as methods are not considered technically equivalent.1.Scope*1.1 This test method covers the determination of the ratingof diesel fuel oil in terms of an arbitrary scale of cetanenumbers using a standard single cylinder,four-stroke cycle,variable compression ratio,indirect injected diesel engine.1.2 The cetane number scale covers the range from zero(0)to 100,but typical testing is in the range of 30 to 65 cetanenumber.1.3 The values for operating conditions are stated in SI unitsand are to be regarded as the standard.The values given inparentheses are the historical inch-pound units for informationonly.In addition,the engine measurements continue to be ininch-pound units because of the extensive and expensivetooling that has been created for these units.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 standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.For more specific warning statements,see Annex A1.1.5 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:2D975 Specification for Diesel FuelD1193 Specification for Reagent WaterD2500 Test Method for Cloud Point of Petroleum Productsand Liquid FuelsD3703 Test Method for Hydroperoxide Number of AviationTurbine Fuels,Gasoline and Diesel FuelsD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4175 Terminology Relating to Petroleum Products,LiquidFuels,and LubricantsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceE456 Terminology Relating to Quality and StatisticsE542 Practice for Calibration of Laboratory VolumetricApparatusE832 Specification for Laboratory Filter Papers3.Terminology3.1 Definitions:3.1.1 accepted reference value(ARV),na value that servesas an agreed-upon reference for comparison,and which isderived as:(1)a theoretical or established value,based onscientific principles,or(2)an assigned or certified value,basedon experimental work of some national or internationalorganization,or(3)a consensus or certified value,based oncollaborative experimental work under the auspices of ascientific or engineering group.E4563.1.1.1 DiscussionIn the context of this test method,accepted reference value is understood to apply to the cetane1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.01 on Combustion Characteristics.Current edition approved Dec.1,2018.Published January 2019.Originallyapproved in 1941.Last previous edition approved in 2018 as D613 18.DOI:10.1520/D0613-18AE01.2For 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.number of specific reference materials determined empiricallyunder reproducibility conditions by the National ExchangeGroup or another recognized exchange testing organization.3.1.2 cetane number(CN),na measure of the ignitionperformance of a diesel fuel oil obtained by comparing it toreference fuels in a standardized engine test.D41753.1.2.1 DiscussionIn the context of this test method,ignition performance is understood to mean the ignition delayof the fuel as determined in a standard test engine undercontrolled conditions of fuel flow rate,injection timing and