To be on the safe side your going to need a VIP and a hydro test. The
VIP is just a visual inspection of the inside of the tank for rust and
whatever else. The hydro test is done in a controlled water tank. They
can measure the amount of expansion the tank has under some very high
pressure for a "x" amount of time usually more pressure then you would
normally fill the tank.
George Procyshyn wrote:
> I picked up a set of welding tanks real cheap. Problem is one of them has a
> good amount of rust on the bottom six inches or so. (ie. good size flakes
> of rust.) My first thought was to just wire brush it real good, tape off
> the bottom foot or so and spray it with rustolium or some such.
> But as I think about this, questions come up, Is this tank still okay? or
> has it's integrity been jeopardized by the rust to a point where it's
> unsafe to fill? Will the welding gas guys refuse to fill it? The walls of
> these tanks ARE a couple of feet thick, ... aren't they?
> any suggestions?
> George Procyshyn