Gas Quality

Standard Natural Gas Specifications 

       
Your gas must meet these specifications to be accepted on our system.     

Compound/Characteristic Metric Imperial
Min Max Units Min Max Units
1 Heating Value * 35   (MJ/m3) 939.4   BTU/ft3
2 Wobbe Index 46.75 50.60 (MJ/m3) 1253 1357 BTU/ft3
3 Hydrocarbon Dewpoint   -10 (°C @ operating pressure)       14 °F @ operating pressure
4 Water Content   65 (mg/m3)   4.06 LB.MMcf
5 Hydrogen Sulfide   6 (mg/m3)   0.261 gr/100 ft3
6 Mercaptan Sulphur   6 (mg/m3)   ~1/4 gr/100 ft3
7 Total Sulphur   23 (mg/m3)   ~1 gr/100 ft3
8 Nitric Oxide   15 (ml/m3)   15 ppm by volume
9 Total Oxides of Nitrogen   15 (ml/m3)   15 ppm by volume
10 Carbon Dioxide   2 (% by volume)   2 (% by volume)
11 Oxygen   0.4 (% by volume)   0.4 (% by volume)
12 Temperature   50 (°C)   122 (°F)
13 Other Substances - Should be commercially free from sand, dust, gums, oils, impurities, and other objectionable substances.

Notes:

  1. All m³ @ 101.325 kPa, 15°C
  2. ft³ @ 14.73 psia, 60°F
  3. 6 mg/m³ H2S equates to 4 ppm or more specifically, 4.140 ppm

* TransGas offers a low heating value surcharge service. This lets customers deliver gas with a heating value below 35.0 MJ/m³ onto our system. We will approve this service where low heating values do not affect the quality of downstream deliveries.