There is considerable confusion and ignorance within industry concerning the proper methods for calculating both target loading quantities and actual loaded quantities (volume and mass) of liquids in tank cars. API Chapter 12.1.3 (in progress), will be published to meet the need for both an explanation of the factors required for such calculations and a standard method of calculation. It does not include calculation of clingage, nonliquid material, or vapor space equivalence. It does address calculation sequences, rounding, and significant digits so that different operators can calculate identical results from the same observed data. Tank truck volumes are calculated in a similar manner.
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