I have welded quite a few fuel tanks: gas, diesel and propane. In the last twenty years or so I always fill the tank with inert gas off of my wire welder. I have a Y hose plumbed into the outlet side of the regulator. You will just need to turn up the flow a little to compensate for the second hose. I just wrap a rag around the hose at the fill hole. I let the gas fill the tank for 10-15 minutes before working on the tank. With propane and gas it is much more critical because some of the fuel is in the pores of the tank. So when you heat it you get more fuel that can explode. One of my great Uncles had a junk yard. He had an old car that had the gas drained out and it had set for many years, no cap. He sold the gas tank off of it. He cut the straps off with a torch, no problem. He was carrying it back up to the office and lite his cigarette. It exploded under his arm. Luckily it blew the ends out and did not hurt him seriously. When he had heated it up cutting the straps it released some fumes and that let it explode. The way I do it is safe with the inert gas. I have been splitting one fuel tank on semi for a hydraulic tank. I do several each month.
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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