On Friday, June 18, 2010 at 8:58:42 PM UTC-5, 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 ?

I work for a welding supply company that handles both medical and industrial grade Oxygen. yes they are both filled from the same tank of bulk oxygen.. Then problem isnt what is put in the tank. Its what was in the tank before. A typical oxy act cutting set up can bleed actylene back into the oxygen bottle if ran dry. There are so many other means of contamination. Medical bottles are used for medical only. So the 99.50% required to make USP oxygen is true for all oxygen bottles. But its the other .50% that you dont know what you are getting.