Welding a used gas tank

[raustinss]

Originally Posted by T_Raven

I used the pump out of a 98 Camaro tank in my 67 GMC. I just needed a quick, cheap way to get the truck running so I put the Camaro pump in the stock, in cab GMC tank.

I filled the Camaro tank with water and cut the ring out



I filled the GMC tank with water and welded it in. It works fine until I get around to putting a tank under the bed.



A lot of people are really concerned about welding on a gas tank. It can't explode if water is displacing any fuel vapor. If there's a cheap option to just buy the tank you need, then that's not a bad idea, but I wouldn't be afraid to weld on a used tank.

As someone who is a fabricator I must say you are retarded !
-there is still air space in the tanks
-Water and electricity don't mix
-Metal fume fever is not cool
-Just because you have done it and it's worked ok doesn't mean it always will, why do you think that professional shops are leary about welding them. Not only that just because you have a "good" looking weld (which look terrible and just a bunch of tacks) on the tank I must ask
-Was the tank pressure tested after welding ?
-Did you use a mirror to inspect the other side of the welds to ensure proper penitration ?
-Was the tank "regalvinized "?
-If the tank wasn't pressure tested were the welds tested with liquid dye pen.?
Mag particle ?
-If it was pressure tested to what pressure and what was your process for finding potential leaks?
So please go ahead and fill my mind with your profound knowledge as you are now a professional gas tank welder and are teaching others how to endanger their own and possibly others lives