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Title: The Expanding Use Of LNG From Natural Gas To Satisfy World Energy Demand Can Use Technologically Superior Ultrasonic Cryogenic Liquid Flow Metering, And Ultrasonic Gas Metering For Process And Custody Transfer Operations
Author: Jacob Freeke, James Matson, Michael Scelzo
Source: 2007 South East Asia Flow Measurement Conference
Year Published: 2007
Abstract: Transit-time Ultrasonic Flowmeters are now firmly established as an acceptable technology for gas and liquid flow measurement in the global Oil & Gas Industry. The technology has not only proven to be extremely accurate, exceeding legal metrology requirements, but also able to yield considerable savings for operators due to the effective absence of both pressure drop and maintenance requirements. This paper discusses how two advanced flowmeter designs, one for liquid LNG, and one for Natural Gas can help financially offset the impact of the anticipated increase in flowmeter numbers within the industry. A patented Bundle Waveguide Technology (BWT) system, using a unique design of a thermal buffer enables ultrasonic transducers, and hence flow meters, to be employed, complete with possible removal without affecting line integrity or safety, for liquid cryogenic LNG flow measurement. The paper will cite numerous installations on cryogenic LNG flow measurement applications that have been operating successfully for several years at LNG liquefaction and regasification facilities. Transit-time ultrasonic technology can accommodate the largest LNG pipeline encountered so far, significantly in excess of the largest pipe size accommodated by alternate technologies, without pressure loss and with lower capital outlay. BWT technology theory, design and a case study are discussed.

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