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Title: Multi-Path Ultrasonic Meters For Custody Transfer Natural Gas Measurement
Author: Martin Schlebach
Source: 2006 International School of Hydrocarbon Measurement
Year Published: 2006
Abstract: In the past ten years the use and acceptance of Ultra Sonic Meters (USMs) to measure high pressure natural gas has risen exponentially. Not only has the technology been used in retrofitting or adding stations on existing pipelines, but it was the technology used on the latest major new pipelines constructed in recent years. There have been several reasons for the increased acceptance, the first was the release of AGA report #9 and related standards that deal with the use of USMs in custody transfer measurement. These standards coupled with the meters inherent advantages have propelled the USMs to their current level of acceptance. These advantages include no pressure drop, low capital costs for larger sized meters (10?), high turndown ratio (80-1) and little or no periodic maintenance. With the decreasing size of most maintenance departments, the ability to lower, even eliminate periodic site visits has become increasingly important. This was a huge point of consideration when one of the new pipelines decided to use USMs, even in smaller sizes where the price is higher than other metering technologies, The potential saving in OPEX greatly outweighed the initial CAPEX.

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