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Title: Testing Of An 8-PATH Ultrasonic Meter To International Standards With And Without Flow Conditioning
Author: Gregor J Brown, William R Freund, Alastair Mclachlan
Source: American Gas Association 2013
Year Published: 2013
Abstract: Multipath ultrasonic meters were first developed for gas custody transfer applications in the mid to late 1980s. The technology offered significant benefits over traditional orifice metering in terms of increased rangeability and reductions in pressure loss, upstream straight length requirements and routine maintenance. It was also hoped that based on measurement on meter geometry and correction for non-fluid time delays in the signals, determined during factory bench testing, it would be possible to use ultrasonic meters without flow calibration, in the same way that orifice meters are still used today.

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