ASTM D2699-04e1
(Test Method)Standard Test Method for Research Octane Number of Spark-Ignition Engine Fuel
Standard Test Method for Research Octane Number of Spark-Ignition Engine Fuel
SCOPE
1.1 This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Research O.N., except that this test method may not be applicable to fuel and fuel components that are primarily oxygenates. The sample fuel is tested using a standardized single cylinder, four-stroke cycle, variable compression ratio, carbureted, CFR engine run in accordance with a defined set of operating conditions. The O.N. scale is defined by the volumetric composition of PRF blends. The sample fuel knock 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 sample fuel establishes the Research O.N.
1.2 The O.N. scale covers the range from 0 to 120 octane number but this test method has a working range from 40 to 120 Research O.N. Typical commercial fuels produced for spark-ignition engines rate in the 88 to 101 Research O.N. range. Testing of gasoline blend stocks or other process stream materials can produce ratings at various levels throughout the Research O.N. range.
1.3 The values of operating conditions are stated in SI units and are considered standard. The values in parentheses are the historical inch-pound units. The standardized CFR engine measurements continue to be in inch-pound units only because of the extensive and expensive tooling that has been created for this equipment.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 8, 13.4.1, 14.5.1, 15.6.1, Annex A1, A2.3.9, A2.4.8, A3.2.7.2(7), A4.2.3.1, A4.2.3.3(6) and (9), A4.3.5, X2.3.7, X3.2.3.1, X3.3.4.1, X3.3.9.3, X3.3.11.4, and X3.5.1.8.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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An American National Standard
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Designation: D 2699 – 04
Designation: 237/87
Standard Test Method for
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Research Octane Number of Spark-Ignition Engine Fuel
This standard is issued under the fixed designation D2699; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
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e NOTE—Corrected titles of 11.3 and 11.4 and kPa conversion errors in TablesA6.4 and A6.5 editorially in October 2004.
1. Scope* bility of regulatory limitations prior to use. For specific hazard
statements, see Section 8, 13.4.1, 14.5.1, 15.6.1, Annex A1,
1.1 This laboratory test method covers the quantitative
A2.3.9, A2.4.8, A3.2.7.2(7), A4.2.3.1, A4.2.3.3(6) and (9),
determination of the knock rating of liquid spark-ignition
A4.3.5, X2.3.7, X3.2.3.1, X3.3.4.1, X3.3.9.3, X3.3.11.4, and
engine fuel in terms of Research O.N., except that this test
X3.5.1.8.
methodmaynotbeapplicabletofuelandfuelcomponentsthat
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are primarily oxygenates. The sample fuel is tested using a
2. Referenced Documents
standardized single cylinder, four-stroke cycle, variable com-
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2.1 ASTM Standards:
pression ratio, carbureted, CFR engine run in accordance with
D1193 Specification for Reagent Water
adefinedsetofoperatingconditions.TheO.N.scaleisdefined
D1744 Test Method for Determination of Water in Liquid
bythevolumetriccompositionofPRFblends.Thesamplefuel
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Petroleum Products by Karl Fischer Reagent
knockintensityiscomparedtothatofoneormorePRFblends.
D2268 Test Method forAnalysis of High-Purity n-Heptane
The O.N. of the PRF blend that matches the K.I. of the sample
and Isooctane by Capillary Gas Chromatography
fuel establishes the Research O.N.
D2360 Test Method for Trace Impurities in Monocyclic
1.2 The O.N. scale covers the range from 0 to 120 octane
Aromatic Hydrocarbons by Gas Chromatography
number but this test method has a working range from 40 to
D2700 Test Method for Motor Octane Number of Spark-
120 Research O.N. Typical commercial fuels produced for
Ignition Engine Fuel
spark-ignition engines rate in the 88 to 101 Research O.N.
D2885 Test Method for Determination of Octane Number
range.Testing of gasoline blend stocks or other process stream
of Spark-Ignition Engine Fuels by On-Line Direct Com-
materials can produce ratings at various levels throughout the
parison Technique
Research O.N. range.
D3703 Test Method for Peroxide Number of Aviation
1.3 The values of operating conditions are stated in SI units
Turbine Fuels
and are considered standard. The values in parentheses are the
D4057 Practice for Manual Sampling of Petroleum and
historical inch-pound units. The standardized CFR engine
Petroleum Products
measurements continue to be in inch-pound units only because
D4175 Terminology Relating to Petroleum, Petroleum
oftheextensiveandexpensivetoolingthathasbeencreatedfor
Products, and Lubricants
this equipment.
D4177 Practice for Automatic Sampling of Petroleum and
1.4 This standard does not purport to address all of the
Petroleum Products
safety concerns, if any, associated with its use. It is the
D4814 SpecificationforAutomotiveSpark-IgnitionEngine
responsibility of the user of this standard to establish appro-
Fuel
priate safety and health practices and determine the applica-
D5842 Practice for Sampling and Handling of Fuels for
Volatility Measurements
E1 Specification for Liquid-in-GlassASTMThermometers
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This test method is under the jurisdiction of ASTM Committee D02 on
PetroleumProductsandLubricantsandisthedirectresponsibilityofSubcommittee
D02.01 on Combustion Characteristics.
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Current edition approved May 1, 2004. Published June 2004. Originally For referenced ASTM standards, visit the ASTM website, www.astm.org, or
approved in 1968. Last previous edition approved in 2003 as D2699–03a. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Motor O.N., determined usingTest Method D2700, is a companion method to Standards volume information, refer to the standard’s Document Summary page on
provide a similar but typically lower octane rating under more severe operating the ASTM website.
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conditions. Withdrawn.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D2699–04
E456 Terminology for Relating to Quality and Statistics for sample and reference fuels is determined using the falling
E542 Practice for Calibration of Laboratory Volumetric level technique th
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