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Title: The API/GPA Orifice Discharge Coefficient Project Data Base
Author: W. A. Fling, Jr.
Source: 1986 International Symposium on Fluid Flow Measurement
Year Published: 1986
Abstract: The American Petroleum Institute (API) and the Gas Processors Association (GPA) have completed a four year, research program to develop a new archival discharge coefficient data base for concentric, square edged, flange tapped orifice meters. The program measured discharge coefficients over a pipe Reynolds number range of 150 to 20,000,000, and resulted in approximately 21,000 new discharge coefficients. The conceptual design is presented that was followed for the three single phase, newtonian fluids viscous oil, water, and pipeline quality natural gas. The goal of the conceptual design was to clearly define the experimental map and the experimental pattern that would achieve an uncertainty in the discharge coefficient of 0.2 percent over a sufficiently large pipe Reynolds number range.

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