Where do i purchase an aged made use of oxygen tank to work with for any furnace?

Qusetions: i'm making a furnace so i require to learn in which to obtain a made use of tank or maybe a tank of equal dimension. in case you have any advise, make sure you aid.

Answers:a metal scrap lawn.
large round steel pipe performs excellent too
ive constructed lots of with it

Answers:go to a scuba dive store. The aged tanks are steel and a few require to become replaced if they never pass
a stress check.