Scope
1.1 This test method covers the determination of the amount of carbon residue(Note1)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 non volatile 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(Note2 and Note4)
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.