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I have a friend that has welded a few tanks before....he runs exhaust fumes into the tank while he's welding it. the idea is to eliminate the oxygen, or at least replace the air in the tank with something that will not burn, or allow anything else to burn.


I used to have a link to an Army welding training manual that was on the internet. The above method was what the manual recommended..

Personally I feel safer filling it with water to where the water is just out of reach of where I'm going to weld or cut it...

2000 4Runner,V6,Auto,31's, Sliders, Skids, On-Board Air, Air Shocks
Related Interests: Welding, Ham Radio, Road Tripping (Blue Highways), High End Video/Audio Systems