The parameter has no units as it is the ratio of the Density of oil at a temperature to the Density of water at a temperature (thus the correct terminology of Relative Density). Commonly the recorded temperatures are 60/60F but alternative temperatures of 15/4C may also be found. This latter Relative Density is in fact Density 15C given that the Density of water at 4C is 1.00.ĪSTM Tables- Table 5A, 6A, 23A, 24A, 53A, and 54A are ASTM tables for Crude Oils - Table 5B, 6B, 23B, 24B, 53B, and 54B are ASTM tables for Petroleum products. Table 5C, 24C and 54C are ASTM tables USING Thermal Expansion Coefficients. Table 5D, 6D, 53D and 54D are ASTM tables for Lubrication Oils. The ODD tables are for converting API, Relative Density or Density into API 60, RD60 or DENS15.
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