ASTM D1481 Density and Relative Density (Specific Gravity) of Viscous Materials
ASTM D1481 Standard Test Method for Density and Relative Density (Specific Gravity) of Viscous Materials by Lipkin Bicapillary Pycnometer
1. Scope
1.1 This test method covers the determination of the density of oils more viscous than 15 cSt at 20°C (mm2/s), and of viscous oils and melted waxes at elevated temperatures, but not at temperatures at which the sample would have a vapor pressure of 100 mm Hg (13 kPa) or above.
NOTE 1 - To determine the densities of less viscous liquids at 20 or 25°C use Test Method D1217.
1.2 This test method provides a calculation procedure for converting density to relative density (specific gravity).
1.3 The values stated in SI units are to be regarded as the standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
D1217 Test Method for Density and Relative Density (Specific Gravity) of Liquids by Bingham Pycnometer
D1250 Guide for Petroleum Measurement Tables
3. Terminology
3.1 Definitions:
3.1.1 density - the weight in a vacuum (that is, the mass) of a unit volume of the material at any given temperature.
3.1.2 relative density (specific gravity) - the ratio of the mass (weight in a vacuum) of a given volume of material at a temperature, t1, to the mass of an equal volume of water at a reference temperature, t2; or the ratio of the density of the material at t1 to the density of water at t2.
