"beaufortnc" wrote in news:1136506471.958632.165480
@g44g2000cwa.googlegroups.com:

Is there an obvious mistake in this logic?


Yes! Propane canisters have a BLOWOFF VALVE! Big tanks do too!

They're not "leaking"....they're blowing off excess pressure because
propane pressure depends a LOT on temperature and the blowoff valve is
there to keep the can from exploding, not from fire, but from PSI!

Look on a propane torch tank top. See that little hole that looks like its
got the guts of a tire valve in it? That's the excess pressure relief
valve! The aluminum cans have a popoff valve in them, too, but not
resettable like the propane torch tanks.