On Jun 18, 6:58*pm, Some Guy wrote:
Is there any difference between a tank of welding oxygen vs medical
oxygen as far as purity, concentration, hazardous impurities, etc, that
would render welding oxygen insufficient (or even dangerous) for helping
to supplement breathing / respiration ?

Yes there is a difference according to my first aid training (years
ago). You can use in the case of emergency. It is IIRC too dry to
use for extended periods (I should have paid more attention to that
discussion).

Harry K