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Title: Basic Theory And Fundamentals Of Gas Pressure Regulation
Author: Robert C. Lisk
Source: 1966 Appalachian Gas Measurement Short Course
Year Published: 1966
Abstract: To the problem of providing sufficient strength in regulator components to withstand the static pressures which may be imposed, there must be added the problems of mass and velocity. These factors introduce difficulties which arc ofttimes surprising and just as often puzzling. Natural gas. with its specific gravity of less than tmily. does not ordinarily impress us with its weight. A cubic foot at standard conditions weighs only 5/100 of a pound. This we might be templed to ignore. When we consider also the quantities, as well as the weights of the gas in a specific situation, we begin to realize that it would be a gross error to overlook the mass involved. Even a relatively small pressure reducing valve, such as a i house service regulator, can pass 1,000 cubic feet per hour and thus must be designed to handle a weight totaling 50 pounds each hour, This weight handling requirement becomes more apparent when we take a look at something on the order of a 6 regulator cutting from a pipeline pressure of perhaps 750 psi down to 250 psi. The hourly capacity under these critical pressure drop conditions is 10.000,000 cubic feet per hour. The total weight in this situation is half a million pounds!

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