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Author: James N. Witte
Source: 2019 Appalachian Gas Measurement Short Course
Year Published: 2019
Abstract: This paper will present a discussion on the hydrocarbon dew point of a gas, and is intended as an introduction for operations technicians to the conditions that determine a hydrocarbon dew point value, operating concerns generated when the hydrocarbon dew point is reached, and approaches to the management of gas quality to control hydrocarbon dew point in pipeline systems. The hydrocarbon dew point is one of the most important parameters dening the quality of a natural gas mixture. The signs of having reached hydrocarbon dew point are readily recognizable. Evidence of reaching the hydrocarbon dew point include a high liquid line (stain) found on an orice plate, liquid that is found when trying to take a gas sample or a sound speed comparison error in an ultrasonic meter diagnostic routine. One of the distinguishing characteristics of hydrocarbon liquid is that at atmospheric pressure and temperature the liquid will rapidly vaporize without a trace.

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