"LSMFT" wrote

Seems like my dad had a machine that created (or condensed) oxygen from
the air for him to breath. No bottles to change.
Why can't they do that for welding?


Oxygen concentrators remove the nitrogen and leave you with about 93%
oxygen. It has no pressure though, and it would still have to be
pressurized to about 10 psi to work for welding. Probably not impossible,
just not practical.