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The author correlates data previously published on metering fluid flow through pipe lines and analyzes the requirements for piping arrangements, according to interpretations developed from many actual field installations. Most of the recommendations given in the literature are based on standards of piping requirements established by the Joint A.G.A.-A.S.M.E. Committee on Orifice Coefficients. These standards as well as others obtained since that report was published in 1935 are shown in this paper in the form of seven schedules covering the use of “Orifices and Flow Nozzles,” and an eighth schedule, applying to “Venturi Tubes” only. These schedules serve as the basis for developing typical piping layouts which are designed to interpret and clarify the principles involved from a practical application standpoint.

For the last six years, the Special Research Committee on Fluid Meters has been conducting a research on flow nozzles. In previous papers relating to the program, the Committee’s plans for carrying out the research were outlined (1), and some of the results obtained have been presented (2, 3, 4). In the present paper, the results of determinations of coefficients of long-radius nozzles when used with pipe-wall taps are given, as based on a combination of separate analyses by the three authors. Later papers will extend the results to other conditions than those considered in this paper.