ASTM D246 Method for Distillation of Creosote and Creosote-Coal Tar Solutions
3. Summary of Test Method
3.1 A 100-g sample is distilled at a controlled rate in a 300-mL flask. The weights of distillate fractions at a series of specified temperatures and of residue at the maximum specified temperature are determined. The residue and distillates may be tested by appropriate procedures.
4. Significance and Use
4.1 Creosote quality is defined by the boiling ranges of its distillation fractions. The boiling limits of the fractions as determined by this test method must conform to the limits established by Specifications D390 and D391 to qualify the creosote as an acceptable preservative for its intended application.
