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Title: Orifice Meters For Liquid Measurement
Author: Marsha C. Yon
Source: 1987 International School of Hydrocarbon Measurement
Year Published: 1987
Abstract: The theoretical foundation for the measurement of fluid flow by orifice meters was laid near the start of the 17th century and the development work for the use of the concentric orifice dates back to the early 1900s. Today research efforts continue to expand our knowledge of orifice measurement and to increase the data base from which more accurate calculations can be determined. Efforts by such organizations as the American Petroleum Institute, American Gas Association, Gas Processors Association and others have resulted in a standard for orifice metering issued by the American National Standards Institute (ANSI 2530). The latest revision of the document was released in 1985. Other documents on orifice measurement include one by the American Society of Mechanical Engineers (ASME MFC-3M-1985) and another by the International Standards Organization (ISO-5167). There are variations among these documents, notably different equations for the calculation of the discharge coefficient, therefore, a choice must be made as to which one is to be the reference for measurement practices.

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