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Title: AUDITING ELECTRONIC GAS MEASUREMENT PER API MPMS, CHAPTER 21.1
Author: Keith Fry
Source: 2023 American School of Gas Measurement Technology
Year Published: 2023
Abstract: Advances in technology during the last decades of the 20th century led the gas measurement industry from the pneumatic / mechanical age to the electronic / digital age. While these advances allowed the industry to improve the accuracy of gas measurement, they also brought an abundance of data with additional complexity. Flow measurement information was inconsistent and often incomplete among manufacturers and data service providers. Those responsible for custody transfer and interested parties needed assurances of the integrity and accuracy of the measurement processes. The industrys response was to standardize electronic gas measurement, resulting in APIs Manual of Petroleum Measurement Standards (MPMS), Chapter 21, Section 1 - Flow Measurement Using Electronic Metering Systems (API 21.1). API 21.1 standardized how the components of an electronic gas measurement system should work together to provide accurate and auditable gas measurement. Auditing electronic gas measurement systems involves reviewing and examining the electronic measurement process and data. An adequate review of the data cannot be performed without a minimum amount of information. The API 21.1 standard provides the minimum requirements for compiling and maintaining sufficient data and information for verification and application of reasonable adjustments to electronic gas measurement systems

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