ASTM D4715 Test Method for Coking Value of Tar and Pitch (Alcan)
3. Summary of Test Method
3.1 A test portion of the tar or pitch is heated for a specified time at 1022 more or less 18°F (550 more or less 10°C) in an electric furnace. The percentage of residue is reported as the coking value.
4. Significance and Use
4.1 This test method is useful for indicating the relative coke-forming propensities and for evaluating and characterizing tars and pitches. The test method can also be used as one element in establishing the uniformity of shipments or sources of supply.
