gas tank sodering

I narrow a tank with a mig welder years back. I used water. I then cut the tank and rinced it again. several days later I held a propane torch into the cut open tank. It lit and burned for several minutes.

I just split a 3 peice tractor tank for clean out and repair. I filled the tank with argon gas like you would do a roll cage. It weld perfect.

I added some extra **** for enjoyment