ASTM D2699-01
(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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 2699 – 01 An American National Standard
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 D 2699; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
1.1 This laboratory test method covers the quantitative 2.1 ASTM Standards:
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determination of the knock rating of liquid spark-ignition D 1193 Specification for Reagent Water
engine fuel in terms of Research O.N., except that this test D 1744 Test Method for Water in Liquid Petroleum Prod-
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method may not be applicable to fuel and fuel components that ucts by Karl Fischer Reagent
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are primarily oxygenates. The sample fuel is tested using a D 2268 Test Method for Analysis of High-Purity n-Heptane
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standardized single cylinder, four-stroke cycle, variable com- and Isooctane by Capillary Gas Chromatography
pression ratio, carbureted, CFR engine run in accordance with D 2360 Test Method for Trace Impurities in Monocyclic
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a defined set of operating conditions. The O.N. scale is defined Aromatic Hydrocarbons by Gas Chromatography
by the volumetric composition of PRF blends. The sample fuel D 2700 Test Method for Motor Octane Number of Spark-
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knock intensity is compared to that of one or more PRF blends. Ignition Engine Fuel
The O.N. of the PRF blend that matches the K.I. of the sample D 2885 Test Method for Research and Motor Method Oc-
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fuel establishes the Research O.N. tane Ratings Using On-Line Analyzers
1.2 The O.N. scale covers the range from 0 to 120 octane D 3116 Test Method for Trace Amounts of Lead in Gaso-
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number but this test method has a working range from 40 to line
120 Research O.N. Typical commercial fuels produced for D 3237 Test Method for Lead in Gasoline by Atomic
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spark-ignition engines rate in the 88 to 101 Research O.N. Absorption Spectrometry
range. Testing of gasoline blend stocks or other process stream D 3703 Test Method for Peroxide Number of Aviation
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materials can produce ratings at various levels throughout the Turbine Fuels
Research O.N. range. D 4057 Practice for Manual Sampling of Petroleum and
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1.3 The values of operating conditions are stated in SI units Petroleum Products
and are considered standard. The values in parentheses are the D 4175 Terminology Relating to Petroleum, Petroleum
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historical inch-pound units. The standardized CFR engine Products, and Lubricants
measurements continue to be in inch-pound units only because D 4177 Practice for Automatic Sampling of Petroleum and
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of the extensive and expensive tooling that has been created for Petroleum Products
D 4814 Specification for Automotive Spark-Ignition Engine
this equipment.
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1.4 This standard does not purport to address all of the Fuel
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safety concerns, if any, associated with its use. It is the E 1 Specification for ASTM Thermometers
responsibility of the user of this standard to establish appro- E 542 Practice for Calibration of Laboratory Volumetric
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priate safety and health practices and determine the applica- Apparatus
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bility of regulatory limitations prior to use. See 8.1-8.3, 2.2 ANSI Standard:
8.3.1-8.3.3, 8.4-8.6, 13.4.1, 14.5.1, 14.5.4, 15.6.1, A2.3.9,
A3.2.7.2(a), A4.2.3.1, A4.2.3.3(f) and (i), 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 and
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Annual Book of ASTM Standards, Vol 11.01.
Annex A1 for specific hazard statements.
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Annual Book of ASTM Standards, Vol 05.01.
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Annual Book of ASTM Standards, Vol 06.04.
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This test method is under the jurisdiction of ASTM Committee D02 on Annual Book of ASTM Standards, Vol 05.04.
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Petroleum Products and Lubricants and is the direct responsibility of Subcommittee Discontinued; see 1994 Annual Book of ASTM Standards, Vol 05.02.
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D02.01 on Combustion Characteristics. Annual Book of ASTM Standards, Vol 05.02.
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Current edition approved June 10, 2001. Published July 2001. Originally Annual Book of ASTM Standards, Vol 05.03.
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published as D 2699 – 68. Last previous edition D 2699 – 99. Annual Book of ASTM Standards, Vol 14.03.
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Motor O.N., determined using Test Method D 2700, is a companion method to Annual Book of ASTM Standards, Vol 14.02.
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provide a similar but typically lower octane rating under more severe operating Available from American National Standards Institute, 11 W. 42nd St., 13th
conditions. Floor, New York, NY 10036.
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D 2699
C-39.1 Requirements for
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