TECHNOLOGY Review of tank measurement errors reveals techniques for greater accuracy

Frank J. Berto Consultant San Anselmo, Calif. Fig. 1 [16158 bytes] Fig. 2 [15514 bytes] Fig. 3 [15774 bytes] Fig. 4 [15610 bytes] Tank gauging is a common source of error in custody-transfer measurements of crude oil and petroleum products. Although the accuracy of tank gauging has improved markedly over the last century, several sources of error still exist. This first article in a two-part series traces the history of tank measurement accuracy, reviews the sources of measurement errors, and recommends procedures to increase measurement accuracy. The second article will detail current measurement techniques and describe the adva...

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