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Title: Evaluation Of Clamp-On Ultrasonic Gas Transit Time Flowmeters For Natural Gas Applications
Author: V. C. Ting, X. Shirley Ao
Source: 2002 North Sea Flow Measurement Workshop
Year Published: 2002
Abstract: This paper presents the results of meter performance tests of the Clamp-on Ultrasonic Gas Transit Time Flowmeter GC868 now manufactured by GE Panametrics. Evaluation tests were conducted during the week of December 3, 2001, at the Colorado Engineering Experiment Station, Inc., (CEESI) Wet Gas Test Facility in Nunn, Colorado, USA. The objective of these evaluation tests was to determine the accuracy of clamp-on gas flowmeters at field operating conditions where gas is dry and/or contains a small amount of entrained liquid. The clamp-on ultrasonic gas flowmeter was introduced commercially in 2001. Its transducers clamp on the outside of the pipe wall and cause no pressure drop despite wide rangeability. Since no tapping or cutting of the pipe wall is required, permanent installation costs are significantly reduced. Clamp-on ultrasonic gas meters are suitable for monitoring, control, and diagnostics applications. Advantages such as shorter tube length requirement, lighter meter weight, zero pressure drop, ease of installation and lower unit cost will contribute to capital expenditure (CAPEX) and operating expenditure (OPEX) reductions.

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