March 2013, Vol. 240, No. 3

Features

Achieving Better Liquid Measurement Accuracy

Custody transfer measurement in the oil and gas business has been described many ways. It has been called, “An accuracy in measurement that both the buyers and sellers can agree upon” and “The best that can be achieved to meet the contract conditions.” But I prefer to call it, “The search for the truth.” Ever since petroleum has been bought and sold, people have searched for better ways to measure oil and petroleum products on the fly with greater accuracy. One big advancement has been the pipe prover, which compares a known volume between two switches in a pipe to the meter reading. API requires an accuracy of the prover volume of 0.02% when

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