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Title: Theoretical Uncertainty Of Orifice Flow Measurement As 714
Author: Zaki D. Husain
Source: 2000 International School of Hydrocarbon Measurement
Year Published: 2000
Abstract: Orifice meters are the most common meters used for fluid flow measurement, especially in the oil and gas industries. Meters are rugged, mechanically simple, and well suited for field use under extreme weather conditions. In 1779, an Italian physicist named Giovanni B. Ventud (1746-1822) performed the first recorded work that used orifice for the measurement of fluid flow. Many years of field experience with a wide range of meter sizes, variety of fluids, and numerous investigative tests have identified all major contributing factors of measurement uncertainty of orifice flowmeters. Because of their long history of use and dominance in flow measurement, their designs, installation requirements, and equations for flow rate calculation have been standardized by different organizations in the United States and internationally Ref 1-7. These standards provide the guideline for the users to achieve accurate flow measurement and minimize measurement uncertainty. This paper discusses different factors that contribute to the measurement inaccuracy and provide an awareness to minimize or eliminate these errors.

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