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Title: Low Pressure Flow Prover
Author: W. m. Groves
Source: 1976 International School of Hydrocarbon Measurement
Year Published: 1976
Abstract: The low pressure flow prover is a convenient way to proof test large capacity displacement meters in the field. This is possible because it is small, accurate and desirable for several reasons one is that a meter can be tested and proved in place in operating conditions. The low pressure prover can be used with gas or air as the testing medium. Gas is the most commonly used as most meters are in service measuring gas. When testing with gas, the only other equipment needed is a gravity balance, ranarex or other means of determining the specific gravity of the gas. The low pressure prover consists of two pieces of pipe, a set of straightening vanes in the upstream section of pipe, special flanges, six orifices for six different rates, a differential gauge, a stop watch and thermometer.

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