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Title: Auditing Gas Laboratories
Author: David Bromley
Source: 2004 International School of Hydrocarbon Measurement
Year Published: 2004
Abstract: Most measurement personnel focus their attention on assuring the accuracy of volume determination equipment. Many hours are spent verifying/calibrating AP, DP and temperature transmitters/transducers, inspecting orifice plates and collecting gas samples. These gas samples are sent to a laboratory, analyzed and the results are generally accepted and the data used in volume and energy determination. Have you ever considered the implication of a laboratory that was not accurately determining the true composition of the sampled gas? The potential errors from inaccurate determination of relative density, nitrogen and carbon dioxide have a direct impact on volume calculation while errors in component concentration will impact the energy determination. This discussion will focus on a process that will assure that the gas quality information used both to calculate volumes and energy totals is performing at a high level. Since your samples are usually analyzed at the same laboratory facility, a biased error from gas quality determination can have as much or more impact on revenue than even the largest individual volume exchange stations, because this error is spread across all metering stations. Therefore, improving the performance of a gas analysis facility is critical to your overall measurement accuracy and companys bottom line.

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