K.C. Posted May 4, 2013 Share Posted May 4, 2013 So I have started my forge. I made it 40 inches long and 14 wide and high. I made the simple burner out of 3/4 pipe with a 1inch flare on he end. It burns well. What I'm wondering is what BTU and PSI am I looking for? I was looking at HP regulators that top out at 10 PSI. Will that work? I will be forging as well as heat treating. Also wondering about burner placement: I put the burner on the side middle of the forge about three inches down from the top. I am hoping to get a nice heat swirl to avoid hot spots. I figured it will bounce off the opposite wall and swirl ar Quote Link to comment Share on other sites More sharing options...
Frozenforge Posted May 5, 2013 Share Posted May 5, 2013 What are the internal dimensions? You need to figure out the internal volume. If the dimensions you gave are the internal measurements then that works out to 7840 cubic inches. If you have 2" of insulation all around then it would be 3600 cubic inches. A typical 3/4 inch burner can heat about 300 to 350 cubic inches effectivel for welding. Usually you would run the burner around 6psi. Depending on your burner design there will be a sweet spot where you have a neutral or slightly reducing flame. You dont normally want an oxdizing flame (to much oxygen) as it will cause alot of scale on the steel. With a venturi burner they typically will go to an oxidizing flame as you turn the propane pressure up unless you have a choke installed or it is tuned very well. Burner placement is a personal preference. Some like the swirling more even heat and some like to have a hotspot right under the burner. Quote Link to comment Share on other sites More sharing options...
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