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Title: Orifice Fittings For Meter Runs
Author: W. A. Griffin
Source: 1956 Southwestern Gas Measurement Short Course (Now called ISHM)
Year Published: 1956
Abstract: The use of the orifice in the measurement of fluids, particularly water, has long been employed by mankind. This use in measurement in open systems dates back - any hundreds of years. We find mention made in both Egyptian and Greek historical records of the orifice and its use on water measurement. In 1797, an Italian physicist, Giovanni B. Venturi, at the University of Modena, demonstrated through many experiments, the important principle that fluids under pressure in passing through converging pipes gain speed and lose head, and vice versa in diverging pipes.

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