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Significance and Use
This test method is useful for indicating the relative coke-forming propensities and for evaluating and characterizing tars and pitches. This test method can also be used as one element in establishing the uniformity of shipments or sources of supply.
FIG. 1 Apparatus for Determining Carbon Residue
1.1 This test method covers the determination of the coking value of tar and pitch having an ash content not over 0.5 % as determined by Test Method D2415.
1.2 Coking values by this test method are practically the same as those obtained by Test Method D189, but results are more reproducible. The apparatus used is identical, except that an electric furnace is substituted for the gas flame.
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D140 Practice for Sampling Bituminous Materials
D189 Test Method for Conradson Carbon Residue of Petroleum Products
D370 Practice for Dehydration of Oil-Type Preservatives
D2415 Test Method for Ash in Coal Tar and Pitch
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
ICS Number Code 91.100.50 (Binders. Sealing materials)
UNSPSC Code 30121602(Pitch)