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Title: Sampling And Conditioning Of Natural Gas Containing Entrained Liquids Class Number 5260
Author: Donald P. Mayeaux
Source: 2002 International School of Hydrocarbon Measurement
Year Published: 2002
Abstract: Natural gas is bought and sold based on its energy content and volume. The energy content is usually determined by calculations utilizing gas chromatographic (GC) analysis in combination with physical constants. The energy content or heating value is expressed in British Thermal Units (BTU). The energy value for a specific volume of natural gas is derived by multiplying the BTU data and the gas volume expressed in standard cubic feet. The result is expressed in MMBTU or dekatherms. The GC analyses are also used to correct the flow rate data for compressibility. Therefore, errors in analysis of the gas impact the total heating value in two ways, initial BTU determination and corrected flow rate.

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