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D113.5 Fuel Gas Piping Test
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The M/H fuel gas piping
system shall be tested with air before it is connected to the
gas supply. The M/H gas piping system shall be subjected to
a pressure test with appliance shutoff valves in their closed
positions. [NFPA 501A:4.4.5]
The fuel gas piping test shall
consist of air pressure of not less than 10 inches water column
or more than 14 inches water column (2.5 kPa to 3.5
kPa). The fuel gas piping system shall be isolated from the
air pressure source and shall maintain this pressure for not
less than 10 minutes without perceptible leakage. Upon
satisfactory completion of the fuel gas piping test, the
appliance valves shall be opened, and the gas appliance
connectors shall be tested with soapy water or bubble solution
while under the pressure remaining in the piping system.
Solutions used for testing for leakage shall not
contain corrosive chemicals. Pressure shall be measured
with either a manometer, slope gauge, or gauge that is calibrated
in either water inch (mm) or psi (kPa), with increments
of either 1/10 of an inch (2.5 mm) or 1/10 psi (0.7 kPa
gauge), as applicable. Upon satisfactory completion of the
fuel gas piping test, the M/H gas supply connector shall
be installed, and the connections shall be tested with soapy
water or bubble solution. [NFPA 501A:4.4.5.1]
The following warning shall be
supplied to the installer:
WARNING
Do not overpressurize the fuel gas piping system. Damage to valves, regulators, and appliances is capable of occurring due to pressurization beyond the maximums specified. [NFPA 501A:4.4.5.2]
WARNING
Do not overpressurize the fuel gas piping system. Damage to valves, regulators, and appliances is capable of occurring due to pressurization beyond the maximums specified. [NFPA 501A:4.4.5.2]
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