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Title: Basic Fundamentals Of Orifice Metering
Author: Robert L. Foster
Source: 1971 Appalachian Gas Measurement Short Course
Year Published: 1971
Abstract: The orifice meter, as its name implies, utilizes an orifice as its basic element in the measurement of natural gas. The orifice is ofic of the oldest devices known to man for the measurements of rates of flow of fluids from vessels into the open air. The Egyptians used weir orifices for controlling or measuring the flow of water about 2200 B.C. however, it was not until 1904 that Thomas R. Weymouth, an engineer for the United Natural Gas Company, began to experiment with the orifice in closed-pipe flows. He installed a flange union with thin orifice plates in a line in series with a Pilot tube with the intention of studying its behavior and developing a simple rate-reading device. His work was interrupted, and it was not until about 1912 that the orifice meter, as we know it today, was developed. However, there have been some changes for the better since that time.

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