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ASTM D189-05

Historical Revision

Standard Test Method for Conradson Carbon Residue of Petroleum Products

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1.1 This test method covers the determination of the amount of carbon residue (Note 0) left after evaporation and pyrolysis of an oil, and is intended to provide some indication of relative coke-forming propensities. This test method is generally applicable to relatively nonvolatile petroleum products which partially decompose on distillation at atmospheric pressure. Petroleum products containing ash-forming constituents as determined by Test Method D 482 or IP Method 4 will have an erroneously high carbon residue, depending upon the amount of ash formed (Note 0 and Note 0). Note 0The term carbon residue is used throughout this test method to designate the carbonaceous residue formed after evaporation and pyrolysis of a petroleum product under the conditions specified in this test method. The residue is not composed entirely of carbon, but is a coke which can be further changed by pyrolysis. The term carbon residue is continued in this test method only in deference to its wide common usage.

Note 0

Values obtained by this test method are not numerically the same as those obtained by Test Method D 524. Approximate correlations have been derived (see ), but need not apply to all materials which can be tested because the carbon residue test is applied to a wide variety of petroleum products.

Note 4

The test results are equivalent to Test Method D 4530, (see ).

Note 0

In diesel fuel, the presence of alkyl nitrates such as amyl nitrate, hexyl nitrate, or octyl nitrate causes a higher residue value than observed in untreated fuel, which can lead to erroneous conclusions as to the coke forming propensity of the fuel. The presence of alkyl nitrate in the fuel can be detected by Test Method D 4046.

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

1.3 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.


SDO ASTM: ASTM International
Document Number D189
Publication Date Nov. 1, 2005
Language en - English
Page Count 7
Revision Level 05
Supercedes
Committee D02.06
Publish Date Document Id Type View
May 1, 2024 D0189-24 Revision
Nov. 1, 2006 D0189-06E02 Revision
Nov. 1, 2006 D0189-06E01 Revision
Nov. 1, 2006 D0189-06 Revision
Nov. 1, 2005 D0189-05 Revision
Aug. 10, 2001 D0189-97 Revision
Aug. 10, 2001 D0189-01 Revision
Dec. 1, 2019 D0189-06R19 Reaffirmation
Oct. 1, 2014 D0189-06R14 Reaffirmation
Nov. 15, 2010 D0189-06R10E01 Reaffirmation