Standard: ASTM D189 – DIN 51551 – IP 13 – ISO 6615
Conradson Carbon Residues of Petroleum Products
This test method covers the determination of the amount of carbon residue left after evaporation and pyrolysis of an oil, and is intended to provide some indication of relative coke-forming propensities.
ASTM D2416 – Coking Value of Tar and Pitch
This test method covers the determination of the coking value of tar and pitch having an ash content not over 0.5 %.