Model Pipeline specifications for renewable natural gas

 

The RNG Coalition model pipeline specifications were developed in 2013 in coordination with RNG Coalition Membership.

In 2017 the model pipeline specifications are undergoing review by the RNG Coalition's Pipeline Access Advisory Board, which may result in an update and/or expansion of the specifications. 


Antimony: No Testing or Monitoring Required. 

Arsenic: 0.48 mg/m3.

Dust, Gums and Particulate Matter (Biologicals): "Commercially free of Dust, Gums and PM"

CHDP: Not greater than 20°F.

Carbon Dioxide (C02): Not more than 2% by volumetric basis.

Carbon Monoxide (CO): Not more than 0.1% by volume.

Copper: No Testing or Monitoring Required. (Commonly found in geologic natural gas).

Delivery Temperature: Minimum of 40°F and maximum of 120°F.

Ethylbenzene: 650 mg/m3. (Commonly found in geologic natural gas).

Heating Value: Minimum between 950 and 970 Btu/SCF.

Hydrogen: No more than 600 ppm.

Hydrogen Sulfide (H2S): No more than 1,500 mg/m3.

Interchangeability: WOBBE 1290 and 1370.

Lead: No Testing or Monitoring Required. 

Methane: Minimum methane content of 94%.

Methacrolein: No Testing or Monitoring Required. 

Mercaptan: Shall not exceed 610 ppmv.

n-Bitroso-di-propylamine: No Testing or Monitoring Required. 

Nitrogen: Not more than 5% by volumetric basis.

Oxygen: Not more than 0.2% by volumetric basis. (FERC Spec)

p-Dichlorobenzene: No Testing or Monitoring Required.  

Siloxanes: Not more than 1 ppm. (No testing in cattle, hog and poultry waste digesters).

Toluene: No Testing or Monitoring Required. (Commonly found in geologic natural gas).

Total Inerts: Not more than 5% by volumetric basis.

Total Sulfur: No more than 40 grains per dekatherm.

Vinyl Chloride: 21 mg/m3. (No testing in cattle, hog and poultry waste digesters).

Water: Less than or equal to 7 pounds/MMSCF at dry gas conditions (14.73 psia at 60°F).