Eric Proulx Audy Posted October 20, 2020 Share Posted October 20, 2020 Hi, First sorry for my english! Just finished building my first forge from a 20 pounds propane tank, with 2" of kaowool, ITC 100, and kast o lite 30 for the bottom over the kaowool. Just tried it at night and the welded stainless steel coupling became red hot. The colour is really EXAGERATED by my phone on the photo. It was really not as red as this but is what a dark red. Still. I'm a bit concerned. The flare goes about 1/2 to 3/4 of an inch inside the wool. The inside diameter of the flare is close to 1 1/2 after I filed the threads. I feel that it might be too large. The burner head is 1 1/2 wide. I tested it with a shorter 6" instead of a 9"tonight. I use a 0.035 tip. Was running at about 7 psi. I must say the wool is not flush with the inside diameter of the flare. Maybe I should put some refractoiry so that the transition from the flare to the wool extend smoothly into the chamber so that the burn occurs into the chamber??? Also I feel like I might not having enough air pushing into the burner even with the choke fully open. Was burning well outside the forge though. The good thing is that the forge burns hot and I learned a lot about metal working and welding! Any idea because I'm a bit discouraged right now after putting all this together and concerned with safety. Thank you very much Video of my burner with the 9" tube: https://www.youtube.com/watch?v=SwdJt0r1rrE Quote Link to comment Share on other sites More sharing options...
Mikey98118 Posted October 21, 2020 Share Posted October 21, 2020 Yeah, that is a serious problem. What form of insulation does your forge have? Is there any air gap between ypur burner and the forge wall at all? Quote Link to comment Share on other sites More sharing options...
swedefiddle Posted October 21, 2020 Share Posted October 21, 2020 Good Morning, Eric How thick is your insulation? The tip of the burner should be set back into the insulation, not directly into the firebox hot area. You probably will need to add another layer of Insulation. The only other way would be, you don't have enough airflow and the flame is burning back into the Burner Nozzle. Try a hair dryer not pointed directly at the air intake, set it back from the back end of the burner. Play with a reostat to vary the fan speed. Is the gas jet precisely in the center of the burner and aimed down the center of the burner. Sometimes you have to deburr the hole you drilled for the Gas Jet. Move the jet pipe up and down and slowly rotate one way to the other, to hear where the roar is greatest. That will be on center!! There is a reason why beginners should buy a known Forge. Learn to Blacksmith by using a known Forge that is not a bomb, set it and forget it. I know this to be true, because I learnt the hard way. The School of Hard Knocks not the School of Kaboom!! Neil Quote Link to comment Share on other sites More sharing options...
Eric Proulx Audy Posted October 21, 2020 Author Share Posted October 21, 2020 I have 2" of wool with ITC 100 coating and a slab of refractopry on the bottom. The coupling sit about only 1/2" in the wool it is not in the fore box. but the hole that i made in the wool is a bit larger dans than the inside diameter of the coupling and it's definitly not clean. I'll might try with the air dryer but now the trhead on the coupling are unusable. So I'm kind of screwed because i don't not how to fit my burner in the forge. Swedefiddle. Honestly, i'd rather by a new forge than build one myself but i can't find one in Quebec. Mykey, I dont' think there's is a gap betweem the wall and the insulation apart for what seems a small gap between the cover and the main body of the tank. Quote Link to comment Share on other sites More sharing options...
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