July 2016, Vol. 243, No. 7


Different Perspective on Custody Transfer Measurement

Custody transfer measurement in the petroleum industry has been described many ways. It’s been called “an accuracy in measurement both the buyers and sellers can agree upon,” or sometimes described as “the best that can be achieved to meet the contract conditions.” There are many other descriptions as well. But in reality it is simply “the search for the truth.” Ever since liquids have been bought and sold, people have searched for better ways to measure volume on the fly with increased accuracy. A big advancement for liquid measurement in the petroleum industry was the pipe prover. For a bidirectional pipe prover, API requires a repeatability on the prover volume at water draw of 0.02%. Th

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