Quote:
Originally Posted by Sleddgracer
propane flows to the ground when it leaks, CNG rises when it leaks so CNG must weigh less per gal than Propane - perhaps tanks filled with helium would lower GVW?
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Your propane tank is filled with LIQUEFIED petroleum gas. The liquid boils off and provides the gas that you burn. LPG tanks will see 100-300psi depending on temperature.
CNG tanks are filled with COMPRESSED natural gas. It is compressed to over 3000 psi but still in a gaseous state.
Helium tanks make me talk funny....