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LP-Gas System
Basic Facts About LP-Gas
• LP-Gas detectors are a federal requirement on all LP-Gas
equipped recreation vehicles.
• LP-Gas is a by-product produced by refining oil.
• Odor is added to LP-Gas after the refining process.
• Each liquid gallon of LP-Gas produces 1,502 BTU
(British Thermal Unit).
• Temperature effects pressure of LP-Gas. Internal tank
pressure can exceed 200 psi.
• Tanks or valves contain pressure relief valves. The relief valve
opens at 125% above tank rating.
• LP-Gas stops vaporizing at -44ºF.
• Standard LP-Gas operating pressure is 11” of Water Column or
approximately 6¼ ounces per square inch.
• An inch of Water Column is a measurement of applied pressure
to one side of a U-tube ½ filled with water at sea level. The
amount of pressure required to raise the water level 11”,
represents 11” of Water Column.
NOTE: The information is not a complete guide for the use
of LP-Gas tanks or appliances. In cold climates keep fuel
levels above 50% in order to keep vaporization of LP-Gas
at the highest level.
2004 • LaPalma
Pounds Per Gallon 4.24
Specific Gravity of Gas 1.5
Specific Gravity of Liquid 0.504
Cubic Feet Gas Per Gallon of Liquid 36.38
Cubic Feet Gas Per Pound 8.66
BTU Per Gallon 91,502
BTU Per Pound 21,548
Dew Point in Degrees Fahrenheit -44º
Vapor Pressure at 0ºF 31
Vapor Pressure at 70ºF 127
Vapor Pressure at 100ºF 196
Vapor Pressure at 110ºF 230
Flash Point in Degrees Fahrenheit 842º
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