All synthetic natural gas installations should be based on the use of gas having a specific gravity of sixty-five hundredths (0.65), supplied at a standard delivery pressure of nine (9) inches water column pressure at the outlet of the meter. All liquefied petroleum gas installations should be based on the use of a gas having a specific gravity of one and one half (1.50), supplied at a standard delivery pressure of eleven (11) inches water column pressure at the outlet of the meter. Customers may also have a medium delivery pressure of two (2) pounds per square inch pressure at the outlet of the meter in both SNG and LPG systems. Piping systems designed for pressures higher than The Gas Company’s standard delivery pressure will require confirmation on the availability of the design pressure.
To obtain the cubic-feet-per-hour of gas required, divide input of appliances by the average BTU heating value per cubic foot of the gas (SNG = 1,050 BTU per cubic foot, LPG = 2,520 BTU per cubic foot). Consult The Gas Company Engineering Department for assistance.
EXAMPLE:
SNG: 100,000 BTU/Hr rated gas range
100,000 = 95 Cu Ft/Hr
1,050
EXAMPLE:
LPG: 100,000 BTU/Hr rated gas range
100,000 = 40 Cu Ft/Hr
2,520
