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Title: FUNDAMENTALS OF FLOW COMPUTERS
Author: JOHN SWARTZ, TUSHAR SHAH
Source: 2019 Western Gas Measurement Short Course
Year Published: 2019
Abstract: The intention for this paper is to provide an overview of flow computers and how they integrate into the world of electronic gas measurement while utilizing the American Petroleum Institute (API) 21.1 standard. This overview is for those who are new to the industry or for those who are looking for a refresher on the basic application of flow computers. As natural gas moves from the well head to the burner tip, there are several electronic devices in the field used for measurement and control. The electronic flow computer is referred to in API 21.1 as a tertiary device in the electronic gas measurement system (EGM). In the natural gas industry a flow computer is used for differential meter measurement or used for linear meter measurement. Many contracts between companies for custody transfer of natural gas often stipulate that measurement falls into compliance of API 21.1.

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