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Title: Fundamentals Of Orifice Meters
Author: Charles E. Felker
Source: 1976 Appalachian Gas Measurement Short Course
Year Published: 1976
Abstract: The basic reference manual for Orifice Metering of Natural Gas is the AGA Gas Measurement Committee Report No. 3. This document is a result of many years work in development and testing to provide the basis for practically all large volume gas measurements today. This paper will not attemp to develop AGA No. 3 since everyone measuring gas to this specification should have a reference copy available for study. It will be covered to the extent necessary to introduce you to orifice metering. Figure 1 is a schematic of a basic orifice element and a pressure profile at various points. The differential pressure visualized from this pressure profile is important for several reasons.

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