(a) Theses tables provide multipliers for converting to 60 F the volumes of petroleum and petroleum products measured at temperatures between 0 and 125 F in insulated mild steel prover tanks for positive displacement meters. Table A2 is designed for use with liquids generally handled in vessels vented to the atmosphere and is entered with API gravities (Note 1). Table B2 provides factors for computing the volume of a steel tank at an observed temperature, t° F.
Note 1.-The equivalent table for petroleum and its products only is Table 6 of ASTM Standard D1250, Petroleum Measurement Tables.3
(b) These tables have been calculated on the basis that the tank has been calibrated at 60 F.Also, it has been assumed that the tank-shell temperature and the mean temperature of the contents are identical during the time of volume measurement.
(c) An allowance has been made for the expansion of the tank (Note 2), assuming the tank to be constructed of mild steel; the tables in this method do not apply to prover tanks constructed of stainless steel or of aluminum.
Note 2.-Because the allowance for tank expansion is included herein, these tables differ from Tables 6, 24,34, and 54 of ASTM Standard D1250.
(d) Table I is intended only for routine proving of positive displacement meters. It is not suitable for calibrating prover tanks with petroleum liquids.
2Table A and B are available in a separate publication "ASTM Tables for Positive Dis-placement Meter Prover Tanks," in spiral binder with heavy paper cover at a nominal cost from ASTM headquarters.
3 Appears in this publication.