ASTM_D_2699_-_15a.pdf

Designation:D269915aDesignation:237/87Standard Test Method forResearch Octane Number of Spark-Ignition Engine Fuel1This standard is issued under the fixed designation D2699;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.1.Scope*1.1 This laboratory test method covers the quantitativedetermination of the knock rating of liquid spark-ignitionengine fuel in terms of Research O.N.,including fuels thatcontain up to 25%v/v of ethanol.However,this test methodmay not be applicable to fuel and fuel components that areprimarily oxygenates.2The sample fuel is tested using astandardized single cylinder,four-stroke cycle,variable com-pression ratio,carbureted,CFR engine run in accordance witha defined set of operating conditions.The O.N.scale is definedby the volumetric composition of PRF blends.The sample fuelknock intensity is compared to that of one or more PRF blends.The O.N.of the PRF blend that matches the K.I.of the samplefuel establishes the Research O.N.1.2 The O.N.scale covers the range from 0 to 120 octanenumber but this test method has a working range from 40 to120 Research O.N.Typical commercial fuels produced forspark-ignition engines rate in the 88 to 101 Research O.N.range.Testing of gasoline blend stocks or other process streammaterials can produce ratings at various levels throughout theResearch O.N.range.1.3 The values of operating conditions are stated in SI unitsand are considered standard.The values in parentheses are thehistorical inch-pound units.The standardized CFR enginemeasurements continue to be in inch-pound units only becauseof the extensive and expensive tooling that has been created forthis equipment.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 and health practices and determine the applica-bility of regulatory limitations prior to use.For specificwarning statements,see Section 8,14.4.1,15.5.1,16.6.1,Annex A1,A2.2.3.1,A2.2.3.3(6)and(9),A2.3.5,X3.3.7,X4.2.3.1,X4.3.4.1,X4.3.9.3,X4.3.11.4,and X4.5.1.8.2.Referenced Documents2.1 ASTM Standards:3D1193 Specification for Reagent WaterD2268 Test Method for Analysis of High-Purity n-Heptaneand Isooctane by Capillary Gas ChromatographyD2360 Test Method for Trace Impurities in MonocyclicAromatic Hydrocarbons by Gas ChromatographyD2700 Test Method for Motor Octane Number of Spark-Ignition Engine FuelD2885 Test Method for Determination of Octane Number ofSpark-Ignition Engine Fuels by On-Line Direct Compari-son TechniqueD3703 Test Method for Hydroperoxide Number of AviationTurbine Fuels,Gasoline and Diesel FuelsD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4175 Terminology Relating to Petroleum,PetroleumProducts,and LubricantsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD4814 Specification for Automotive Spark-Ignition EngineFuelD5842 Practice for Sampling and Handling of Fuels forVolatility MeasurementD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD6304 Test Method for Determination of Water in Petro-leum Products,Lubricating Oils,and Additives by Cou-lometric Karl Fischer TitrationE344 Terminology Relating to Thermometry and Hydrom-etry1This 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 Oct.1,2015.Published November 2015.Originallyapproved in 1968.Last previous edition approved in 2015 as D2699 15.DOI:10.1520/D2699-15A.2Motor O.N.,determined using Test Method D2700,is a companion method toprovide a similar but typically lower octane rating under more severe operatingconditions.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 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 E456 Terminology Relating to Quality and StatisticsE542 Practice for Calibration of Laboratory VolumetricApparatusE1064 Test Method for Water in Organic Liquids by Coulo-metric Karl Fischer Titration2.2 ANSI Standard:4C-39.1 Requirements for Electrical Analog Indicating In-struments2.3 Energy Institute Standard:5IP 224/02 Determination of Low Lead Content of LightPetroleum Distillates by Dithizone E