med gas

gotta run an oxygen line in a veterinary hospital.Im wondering if I need to run a nitrogen purge while im brazing or if since its not dealing with humans if you dont really have to?

You do. The nitrogen purging is to prevent oxidation inside the tubing during the brazing, and that is important regardless of who is going to get the oxygen.

Thanks HJ.Thats about what i figured.I know what the purge is for,we ran some of the line today and have to run some more tomorrow and the boss was there and as i reached for the nitrogen tank he told me we didnt need it as he checked and there is no regulation on this for vet hospitals.I figured this was b.s. but thought i should ask another plumber with more experience than myself.