It was rainy today and as usual I didn’t have any ambition, so I took on a simple project. WELDINNG WITH PROPANE. I had several sizes of wire .031, .054 and .122 dia. I had several gages of sheet metal .024,035,and .065. I had three regular oxy / acet welding tips #0, ? , #1
I started with the pressures I had use to cut with.(found out my gages don’t read correctly)
First problem is, you can NOT turn on the oxygen along with the gas. It blows everything out. Second you have to turn the gas valve on just a “crack”. Again, to high blows the flame out. When you get the gas lit, then you can turn the gas up until the flame “jumps” off the end of the tip. Then back it down. Now turn on the Oxygen. You can open the oxygen until the flame comes to a very nice point. Everything looking good.
Now is when “the ship hits the sand”. The flame is very cold. Even with the .031 or .054 ga wire it was hard to get the wire to puddle on the end of the wire before touching it to the hot metal. Once you got a blob of wire on the metal, it was almost impossible to “work” the puddle. On thiner metal, I eventually blew a hole in the base metal. On the thicker piece it took for ever to get the base stock hot. The smaller welding tips were worse than the bigger ones, but there again with the bigger hotter flame I had less control of the heat in the metal and wire.
I conclude that it will take a lot more practice to learn to weld with propane. In cutting I went to the propane tip for my O/X torch and it cut fine. The welding tips did not work. TomC
PS I have another set of gages that I might put on and try varying the gas pressures, but I don’t have much hope.