But possibly not under the same conditions, and there is no reason to be meticulous about preventing contamination of welding tanks.
Absolutely its the hydro carbon residue in the tank itself that causes any impurities..
Aviation O2,Welding O2 and Medical O2 should be from the same source...the only difference I am aware of is medical O2 gets
moisture added so patients arent dehydrated by breathing it.
Medical O2 is expensive and in most states you have to have a script to get it...
We had it in the dive shop as part of our first aid and rescue kit and got refills without a script.
So naturally at hangover time it got used...:)
We never took students out without full O2 tanks standing by though...
Can't honestly say it did a dang thing for hangovers though.