ASTM D633-11(2016)

3.1 Tars change in volume with changes in temperature. They are loaded or transferred at widely varying temperatures. Volume correction factors are used to adjust bulk volumes measured at those temperatures with corresponding volumes at a base temperature of either 60°F or 15.6°C for the purposes of custody transfer and accounting operations.

3.2 Correction factors as provided in this table have proven to be sufficiently accurate for the intended purposes.

3.3 The coefficient of expansion for Specification D490 Type RT-12 at 60°F (15.6°C) per degree F is 0.00030.

1.1 This table (Table 1) has been prepared by the National Institute of Standards and Technology to meet a demand from the tar industry for a short and convenient table for reducing volumes of road tar to the basis of 60°F (15.6°C) when extreme accuracy is not required. The table shows the volume occupied at 60°F (15.6°C) by a quantity of material occupying unit volume at the indicated temperature.

1.2 Units—The values stated in inch-pound units are to be regarded as the standard. The values given in