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Title: Auditing Electronic Gas Measurement Per API Chapter 21.1
Author: Stephen T. Stark
Source: 2008 International School of Hydrocarbon Measurement
Year Published: 2008
Abstract: Gas measurement auditing has become much more complex as electronic flow measurement and other computer-based technologies have arrived on the scene. Before the early 1990s, measurement auditing was usually little more than verifying chart integration numbers and digging through piles of field test slips searching for overlooked orifice plate changes, incorrect gas quality information, and missed calibration adjustments. Today, gas measurement auditing is more complex than ever before as gas companies rely on high-speed communication and sophisticated computer networks to gather massive amounts of information required in todays fast-paced energy industry. Flow rates, total energy, pressures, temperatures, gas quality information, flow factors, meter performance data, and a lot more is included in this enormous mix of information. Much of the data collected through these systems is used for purposes other than determining gas flow. The information is also used to monitor, track, and record operating conditions relating to safety, pipeline integrity, gas management, security, and environmentally-relevant issues. Gas measurement and engineering groups sometimes support measurement audits as part of their normal responsibilities. In other cases, special audit teams do the work alone - sometimes with only training. Still, only occasionally do measurement audits extend much beyond the office walls.

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