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Title: API Mpms Chapter 22.2 - Testing Protocol For Differential Pressure Flow Measurement Devices
Author: Richard Estabrook
Source: 2017 International School of Hydrocarbon Measurement
Year Published: 2017
Abstract: The American Petroleum Institute (API) Manuals of Petroleum Measurement Standards (MPMS) are developed for the devices and systems installed for the measurement of oil, gas, and petrochemical products by the oil and gas industry. Historically the API flow meter standards are developed for devices that are accepted and installed by the industry to achieve precise and repeatable measurement for fiscal, material balance, and process control applications. Flow meters can be divided into two classes: Linear and Differential. Linear meters measure some attribute of the fluid such as velocity, magnetic flux, thermal mass, or momentum to derive the flow rate. Examples of these meters include ultrasonic meters, turbine meters, magnetic meters, Coriolis meters, and thermal mass meters. Differential pressure (DP) meters respond to the presence of a primary device placed into the fluid flow which either accelerates or decelerates the fluid in the vicinity of the primary device. The resulting acceleration or deceleration of the fluid causes a pressure change that is proportional to the flow rate. Examples of differential meters include orifice plates, Venturis, nozzles, pitot tubes, and cone meters.

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