Chapter 7 fuel gas systems
NFPA 54 - Answer-National Fuel Gas Code
49 CFR part 192 - Answer-Regulation Transportation of Natural and Other Gas by Pipeline : minimum
safety standards
NFPA 58 - Answer-Liquefied Petroleum Gas Code
Natural gas and commercial propane - Answer-The two most common fuel gases used within the
structure our
Fugitive Gas - Answer-Fuel gases that escape from their piping, storage, or utilization systems and serve
as easily ignited fuels for fires and explosions.
723F to 1170F - Answer-The ignition temperature of most fuel gases ranges from
0.2 mJ - Answer-The minimum ignition energy for these gases can be as low as
Liquefied petroleum or LP gas - Answer-The fuels that are most common in residential use
Natural gas - Answer-A mixture of gases that is often recovered from underground pockets during
drilling operations for crude petroleum
Comprised largely of methane ( 72 to 95 %)
, 0.59 to 0.72 - Answer-Natural gas will have a specific gravity of
3.9 and 15 % flammable range
900F to 1170F ignition temperature - Answer-The flammable range of natural gas is between these
percentages with an ignition temperature of
Commercial propane - Answer-at a minimum is 95% propane and propylene with the remaining 5%
consisting of other gases
2.15 to 9.6 % flammable range
920F to 1120F ignition temperature - Answer-Propane (undiluted) has a specific gravity greater than air
(1.5 to 2.0)
A flammable range of
And an ignition temperature of
Other gases - Answer-Commercial butane largely comprises butane and butylene (minimum 95 %),
where as the remaining 5 % consists of
Propane HD5 - Answer-Is 95 % propane and used as a motor fuel and is subjected to more restrictive
requirements than that of commercial propane
One fifth - Answer-Per NFPA 58 the odorant, must be detectable when the fuel gas is at a concentration
of not less than this amount of its lower explosive limit
From a central location via underground supply service lines - Answer-How natural gas is supplied
LP-gas - Answer-It's storage supply is often located at the consumers site
NFPA 54 - Answer-National Fuel Gas Code
49 CFR part 192 - Answer-Regulation Transportation of Natural and Other Gas by Pipeline : minimum
safety standards
NFPA 58 - Answer-Liquefied Petroleum Gas Code
Natural gas and commercial propane - Answer-The two most common fuel gases used within the
structure our
Fugitive Gas - Answer-Fuel gases that escape from their piping, storage, or utilization systems and serve
as easily ignited fuels for fires and explosions.
723F to 1170F - Answer-The ignition temperature of most fuel gases ranges from
0.2 mJ - Answer-The minimum ignition energy for these gases can be as low as
Liquefied petroleum or LP gas - Answer-The fuels that are most common in residential use
Natural gas - Answer-A mixture of gases that is often recovered from underground pockets during
drilling operations for crude petroleum
Comprised largely of methane ( 72 to 95 %)
, 0.59 to 0.72 - Answer-Natural gas will have a specific gravity of
3.9 and 15 % flammable range
900F to 1170F ignition temperature - Answer-The flammable range of natural gas is between these
percentages with an ignition temperature of
Commercial propane - Answer-at a minimum is 95% propane and propylene with the remaining 5%
consisting of other gases
2.15 to 9.6 % flammable range
920F to 1120F ignition temperature - Answer-Propane (undiluted) has a specific gravity greater than air
(1.5 to 2.0)
A flammable range of
And an ignition temperature of
Other gases - Answer-Commercial butane largely comprises butane and butylene (minimum 95 %),
where as the remaining 5 % consists of
Propane HD5 - Answer-Is 95 % propane and used as a motor fuel and is subjected to more restrictive
requirements than that of commercial propane
One fifth - Answer-Per NFPA 58 the odorant, must be detectable when the fuel gas is at a concentration
of not less than this amount of its lower explosive limit
From a central location via underground supply service lines - Answer-How natural gas is supplied
LP-gas - Answer-It's storage supply is often located at the consumers site
