Gas Quality Specifications | Atmos Energy

Gas Quality Specifications

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Please adhere to these gas quality specifications for interconnections.

The APT system counties except Coke, Crane, Fisher, Jones, Glasscock, Midland, Mitchell, Nolan, Pecos, Reeves, Runnels, Scurry, Sterling, Taylor, Tom Green, Upton, and Ward counties 

  1. Not more than 5 grains total sulphur per ccf
  2. Not more than 1/4 grain H2S (hydrogen sulphide) per ccf
  3. Not more than 1 grain mercaptan sulphur per ccf
  4. Btu (minimum 950, maximum 1100) at 14.65 psi dry
  5. Temperature (maximum +120 degrees F, minimum +40 degrees F)
  6. Not more than 2% by volume CO2 (carbon dioxide)
  7. Not more than .05% by volume oxygen
  8. Not more than 7# water vapor per Mmcf
  9. Interchangeability (IF): ±7% from current gas supply
    IF = Btu divided by v relative density.
  10. HydrocarbonDew Point not more than +40 degrees F at delivery pressure
  11. Not more than 4% by volume total non-hydrocarbon and inert gases

Gas must be of merchantable quality, and commercially free from all water, sand and other objectionable fluids, bacteria, solids and gases.

The West Texas region only include the following APT system counties Coke, Crane, Fisher, Jones, Glasscock, Midland, Mitchell, Nolan, Pecos, Reeves, Runnels, Scurry, Sterling, Taylor, Tom Green, Upton, and Ward 

  1. Not more than 5 grains total sulphur per ccf
  2. Not more than 1/4 grain H2S (hydrogen sulphide) per ccf
  3. Not more than 1 grain mercaptan sulphur per ccf
  4. Btu (minimum 950, maximum 1100) at 14.65 psi dry
  5. Temperature (maximum +120 degrees F, minimum +40 degrees F)
  6. Not more than 2% by volume CO2 (carbon dioxide)
  7. Not more than 0.05% by volume oxygen
  8. Not more than 7# water vapor per Mmcf
  9. Interchangeability (IF): ±7% from current gas supply
    IF = Btu divided by v relative density.
  10. HydrocarbonDew Point not more than +40 degrees F at delivery pressure
  11. Not more than 3% by volume total non-hydrocarbon and inert gases

Gas must be of merchantable quality, and commercially free from all water, sand and other objectionable fluids, bacteria, solids and gases.