On Aug 13, 12:41 pm, Rocky wrote:
mhorowit wrote:
how low do you let your acetylene tank get before getting a refill? -
Mike

0 PSI

Oxyacetylene rigs should have anti-backflash check valves at
the torch end of the hoses so that oxygen can't go back up through the
acetylene hose and into an acetylene tank that's at zero psi. If those
valves aren't there the operator shouldn't let the tank pressure fall
so low that oxygen pressure could do that. Oxygen in an acetylene tank
is a bomb, of course. Acetylene is already unstable enough without
that.

Dan