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Title: Ultrasonic Metering Of Liquefied Natural Gas For Allocation And Custody Transfer
Author: Gregor Brown, Herb Estrada, Don Augenstein, Terry Cousins
Source: 2007 South East Asia Flow Measurement Conference
Year Published: 2007
Abstract: This paper describes multipath ultrasonic meters designed for the measurement of LNG and addresses the issues that could arise as a result of the challenging application conditions. The paper describes the design and calibration methodology developed at Caldon Ultrasonics for use with 4-path and 8-path chordal ultrasonic meters. The accuracy of the chordal design is compared with the relatively limited capabilities of 2-path configurations. It is demonstrated that the chordal meter calibration retains its applicability in varying installation conditions and at high Reynolds number conditions that cannot be replicated in a calibration facility. The benefit of using a swirl compensating 8-path arrangement is also highlighted.

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