ASTM D633-11 (R2016) PDF Download

The ASTM D633-11 (R2016) standard provides guidelines for adjusting the volume of road tar based on changes in temperature. The standard specifies that tars experience changes in volume as temperature fluctuates, and volume correction factors are necessary to ensure accurate measurements for custody transfer and accounting purposes. The standard identifies a coefficient of expansion for Specification D490 Type RT-12 at 60°F per degree F as 0.00030.

The purpose of the standard is to provide a convenient table, known as Table 1, that allows for the reduction of road tar volumes to a base temperature of 60°F (15.6°C). This table was prepared by the National Institute of Standards and Technology in response to industry demand for a practical and easy-to-use volume correction reference. While the standard acknowledges that extreme accuracy may not be required in all cases, it affirms that the volume correction factors presented in the table have been proven to be sufficiently accurate for the intended purposes.