The 3 sets of previously published tables were in terms of API gravity (Tables 5 & 6), specific gravity (Tables 23 & 24 ), and density in kg/m3 (Tables 53 & 54 ). Tables 23 & 24 are now in relative density units. For accuracy and convenience, 2 or 3 separate tables replace each previous table. For example, Table 6 has been superseded by 6A, Generalized Crude Oils; 6B, Generalized Products; and 6C, Volume Correction Factors for Individual and Special Applications.
Volume X contains computer subroutine listings, example problems, and instructions necessary to use the computer subroutines. Use of this volume with a computer subroutine is a major conceptual departure from previous versions of the tables and recognizes the increasing use of computers to calculate volume correction in the petroleum industry. The actual standard is neither the printed tables nor the set of equations used to represent the density data, but is an explicit implementation procedure used to develop computer subroutines. Strict adherence to the procedures will ensure that all computers and computer codes of the future will produce identical results.