Natural gas
ASTM D1945-14 Standard Test Method for Analysis of Natural Gas by Gas Chromatography. ASTM D3588-98 (2017) Standard Practice for Calculating Heat Value, Compressibility Factor, and Relative Density of Gaseous Fuels. ISO 6974 Natural gas – Determination of composition and associated uncertainty by gas chromatography. ISO 6976 Natural gas – Calculation of calorific values, density, relative density and Wobbe index from composition.
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