AZ Nomad wrote:

On Sat, 19 Jun 2010 22:27:17 -0500, Pete C. wrote:

The purity standard for welding O2 is higher than the purity standard
for medical O2. In reality all three normal grades you can get, welding,
medical and aviator exceed all of the standards. Only the analytical
grade is higher purity.

Nope. Why don't you look it up, starting with 1) the percentage of oxygen
and ending with 2) the levels of impurities.

You can't use welding O2 for medical purposes but you can use medical O2
for welding.

Nope, exactly the opposite.