1、Designation:D689021Standard Test Method forDetermination of Ignition Delay and Derived Cetane Number(DCN)of Diesel Fuel Oils by Combustion in a ConstantVolume Chamber1,2This standard is issued under the fixed designation D6890;the number immediately following the designation indicates the year ofori
2、ginal 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 automated laboratory test method covers the quan-titative deter
3、mination of the ignition characteristics of conven-tional diesel fuel oil,oil-sands based fuels,hydrocarbon oils,blends of fuel containing biodiesel material,diesel fuel oilscontaining cetane number improver additives,and is applicableto products typical of ASTM Specification D975 grades No.1-D S15,
4、No.1-D S500,and No.1-D S5000,and grades No.2-D S15,No.2-D S500,and No.2-D S5000 diesel fuel oils,European standard EN 590,and Canadian standards CAN/CGSB-3.517 and 3.520.The test method may also be appliedto the quantitative determination of the ignition characteristicsof diesel fuel blending compon
5、ents.1.2 This test method measures the ignition delay of a dieselfuel injected directly into a constant volume combustionchamber containing heated,compressed air.An equation cor-relates an ignition delay determination to cetane number byTest Method D613,resulting in a derived cetane number(DCN).1.3
6、This test method covers the ignition delay range from2.64 ms to 6.90 ms(75.1 DCN to 31.5 DCN).The combustionanalyzer can measure shorter and longer ignition delays,butprecision may be affected.For these shorter or longer ignitiondelays the correlation equation for DCN is given in AppendixX2.1.4 For
7、purposes of determining conformance with theparameters of this test method,an observed value or acalculated value shall be rounded“to the nearest unit”in thelast right-hand digit used in expressing the parameter,inaccordance with the rounding method of Practice E29.1.5 The values stated in SI units
8、are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 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 environment
9、al practices and deter-mine the applicability of regulatory limitations prior to use.1.7 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,Gui
10、des and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D613 Test Method for Cetane Number of Diesel Fuel OilD975 Specification for Diesel FuelD1193 Specification for Reagent WaterD4057 Practice for Manual Sam
11、pling of Petroleum andPetroleum ProductsD4175 Terminology Relating to Petroleum Products,LiquidFuels,and LubricantsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD5854 Practice for Mixing and Handling of Liquid Samplesof Petroleum and Petroleum ProductsD6299 Practice for App
12、lying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD6300 Practice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Products,Liquid Fuels,and LubricantsD6708 Practice for Statistical Assessment and Im
13、provementof Expected Agreement Between Two Test Methods that1This 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 July 1,2021.Pub
14、lished July 2021.Originally approvedin 2003.Last previous edition approved in 2018 as D6890 18.DOI:10.1520/D6890-21.2This test method is based on IP PM CQ/2001,published in the IP StandardMethods for Analysis and Testing of Petroleum and Related Products and BritishStandard 2000 Parts.Copyrighted by
15、 Energy Institute,61 New Cavendish Street,London,W1G 7AR,UK.Adapted with permission of Energy Institute.3For 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 Doc
16、ument 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 Barrier
