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Title: Calibration Of Gas Meters With Sonic Nozzles
Author: m. P. Castillon
Source: American Gas Association 1971
Year Published: 1971
Abstract: At present gas meters are calibrated under low pressure with standard gasometers. As the meters can be used under high pressure on the network, the pressure effect upon the error curve must be determined. In order to avoid this drawback, we have been searching another standard of gas flow rate at the Gaz de France test station which disposes of a natural gas having steady characteristics and being available under a pressure of 60 bar and a flow rale superior to 10,000 mVh(N). This study led us to the working out of a new technique based upon a critical ilow meter the venturi nozzle with a cylindrical throat. This paper presents the results of the sonic nozzles calibration atid the equipment composed of sonic nozzles to calibrate meters and two examples of use of this standard of flow rate.

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