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ASTM International - ASTM D4737-04

Standard Test Method for Calculated Cetane Index by Four Variable Equation

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Organization: ASTM International
Publication Date: 1 December 2004
Status: inactive
Page Count: 4
ICS Code (Liquid fuels): 75.160.20
significance And Use:

The Calculated Cetane Index by Four Variable Equation is useful for estimating ASTM cetane number when a test engine is not available for determining this property directly and when cetane... View More

scope:

DESIG: D4737 03 ^TITLE: Standard Test Method for Calculated Cetane Index by Four Variable Equation ^

1.1 The calculated Cetane Index by Four Variable Equation provides a means for estimating the ASTM cetane number (Test Method D 613) of distillate fuels from density and distillation recovery temperature measurements. The value computed from the equation is termed the Calculated Cetane Index by Four Variable Equation.

1.2 The Calculated Cetane Index by Four Variable Equation is not an optional method for expressing ASTM cetane number. It is a supplementary tool for estimating cetane number when a result by Test Method D 613 is not available and if cetane improver is not used. As a supplementary tool, the Calculated Cetane Index by Four Variable equation must be used with due regard for its limitations.

1.3 Procedure A is to be used for Specification D 975, Grades No. 1-D Low Sulfur, No. 1-D, No. 2-D, and No. 4-D. This method for estimating cetane number was developed by Chevron Research Co. Procedure A is based on a data set including a relatively small number of No. 1-D fuels. Test Method D 4737 may be less applicable to No.1-D, No. 1-D Low Sulfur and No. 4-D grades than to No. 2-D grade.

1.4 Procedure B is to be used for Specification D 975, Grade No. 2-D Low Sulfur.

1.5 The test method "Calculated Cetane Index by Four Variable Equation" is particularly applicable to Grade 1-D, Grade No. 1-D Low Sulfur and Grade 2-D diesel fuel oils containing straight-run and cracked stocks, and their blends. It can also be used for heavier fuels with 90 % recovery points less than 382C and for fuels containing derivatives from oil sands and oil shale.

1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.7 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.

Document History

November 1, 2021
Standard Test Method for Calculated Cetane Index by Four Variable Equation
1.1 The calculated Cetane Index by Four Variable Equation provides a means for estimating the ASTM cetane number (Test Method D613) of distillate fuels from density and distillation recovery...
July 1, 2016
Standard Test Method for Calculated Cetane Index by Four Variable Equation
1.1 The calculated Cetane Index by Four Variable Equation provides a means for estimating the ASTM cetane number (Test Method D613) of distillate fuels from density and distillation recovery...
August 1, 2010
Standard Test Method for Calculated Cetane Index by Four Variable Equation
1.1 The calculated Cetane Index by Four Variable Equation provides a means for estimating the ASTM cetane number (Test Method D613) of distillate fuels from density and distillation recovery...
December 1, 2009
Standard Test Method for Calculated Cetane Index by Four Variable Equation
1.1 The calculated Cetane Index by Four Variable Equation provides a means for estimating the ASTM cetane number (Test Method D613) of distillate fuels from density and distillation recovery...
October 1, 2009
Standard Test Method for Calculated Cetane Index by Four Variable Equation
1.1 The calculated Cetane Index by Four Variable Equation provides a means for estimating the ASTM cetane number (Test Method D613) of distillate fuels from density and distillation recovery...
ASTM D4737-04
December 1, 2004
Standard Test Method for Calculated Cetane Index by Four Variable Equation
DESIG: D4737 03 ^TITLE: Standard Test Method for Calculated Cetane Index by Four Variable Equation ^ 1.1 The calculated Cetane Index by Four Variable Equation provides a means for estimating the ASTM...
July 10, 2003
Standard Test Method for Calculated Cetane Index by Four Variable Equation
DESIG: D4737 03 ^TITLE: Standard Test Method for Calculated Cetane Index by Four Variable Equation ^ 1.1 The calculated Cetane Index by Four Variable Equation provides a means for estimating the ASTM...
November 10, 1996
Standard Test Method for Calculated Cetane Index by Four Variable Equation
1.1 The calculated Cetane Index by Four Variable Equation provides a means for estimating the ASTM cetane number of distillate fuels from density and recovery temperature measurements. The value...
November 10, 1996
Standard Test Method for Calculated Cetane Index by Four Variable Equation
1.1 The calculated Cetane Index by Four Variable Equation provides a means for estimating the ASTM cetane number of distillate fuels from density and recovery temperature measurements. The value...
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