Gas Quality Standards

Gas Sampling and Physical Constants – Documents Used

• A.G.A. Report No. 8, Compressibility Factors of Natural Gas and Other Related Hydrocarbon Gases [compressibility in all volume calculations, included by reference in A​GA 3, 7, 9]
• GPA Standard 2145, Table of Physical Constants for Hydrocarbons and Other Compounds of Interest to the Natural Gas Industry [constants for calculation of heating value and specific gravity, all meters]
• ​GPA Standard 2166, Obtaining Natural Gas Samples for Analysis by Gas Chromatography
• GPA Standard 2172, Calculation of Gross Heating Value, Relative Density and Compressibility Factor for Natural Gas Mixtures from Compositional Analysis [Calculation of Heating Value and Relative Density (Specific Gravity) for all meters]
• GPA Standard 2261, Analysis for Natural Gas and Similar Gaseous Mixtures by Gas Chromatography
• API 14.1, Collecting and Handling of Natural Gas Samples for Custody Transfer