Acetylene isn't stable by itself at pressures above about 15 PSI. For that
reason, it's dissolved in a matrix containing acetone in the tank - part of
the reason acetylene tanks are surprisingly heavy for their size. If the
tank has been on its side, it should sit upright for a while before being
used - I don't remember how long, but ISTR that it's on the order of a few
minutes, not hours.
Karl
> If you're serious about safety, shouldn't your tanks always be
> vertical? Valves don't
> get knocked off and there's something about using acetylene after the tank
> has been
> on it's side.
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