ASTM D2416 Test Method for Coking Value of Tar and Pitch (Modified Conradson)
3. Summary of Test Method
3.1 A sample of the tar or pitch is vaporized and pyrolized for a specified time at a specified temperature in special standardized equipment that limits the available oxygen supply. 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. This test method can also be used as one element in establishing the uniformity of shipments or sources of supply.
