My new homemade stainless propane burner. Thanks Guys!

R

rjfm1972

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Jan 13, 2013
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Thanks to a few guys on this forum, I was inspired to build a much nicer high end propane burner. My first one just wasn't getting enough air, and had no adjustable air flow. So in turn, the flame just was barely getting hot enough to bring my steel to non magnetic. Not any more. This new burner gets way hotter. heres my parts list:
1 pc 3/4" sch 40 304ss pipe 9" long
1 pc 1" sch 40 304 ss pipe 2" long
1 pc 1" sch 40 304ss pipe 4" long
1 pc 1/4" sch 40 304ss pipe 8" long
2 pcs 1" X 1 1/2" sch 40 304ss concentric reducers
1 pc .045" mig welding tip (for the jet)
1 pc 1/8" 304 ss sheet cut out to cover end of concentric reducer

so I just welded one reducer to the 4" long piece of 1" 40 pipe (I did have to take the id down on the reducer a little on a lathe to get it to slip over the 3/4" pipe, but this could also be done with a grinding wheel on a dremel) and drilled a hole and tapped it with a 1/4-20 tap for a set screw.This is my nozzle. Then I slipped the 2" long piece over the 3/4" pipe and brought the ends flush and welded it in place. I then welded the other concentric reducer to the end of that 1" pipe. Then I drilled a 9/16" hole all the way through the end of that concentric reducer. I then took the 1/4" pipe, threaded one end and welded the other end shut. I then drilled and tapped a 1/4-28 hole into it about 2" from the end for the jet. I shortened the mig tip so that I could slip the 1/4" pipe through the 9/16" holes, then thread the mig tip into the 1/4" pipe, and spin it 180 degrees so it pointed down the 3/4" pipe. Then I welded the 1/4" pipe in position so the jet was pointing directly down the center. The I welded a small tab with a 1/4-20 tap in it onto the intake side and put the plate on for adjusting the air intake and VOILA. All done. Here is the finished result. Let me know what you guys think. It burns excellent, with tons of adjustability.
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BTW, silver brazing could be used in place of all the welding that I did, for those that don't have access to a tig welder. Also, you can get sch 10 concentric reducers, which will work just as well as the sch 40 ones I used, at mcmaster-carr for 10 bucks a piece. Not cheap, but not that pricey either. Also, the whole thing could be done in carbon steel for less then half the cost.
 
Thanks Jim. I am so new to this that I thought my last burner was good. Then after getting all of your opinions and doing some research, I discovered It wasn't so good. I can't believe how much hotter this thing gets. Do you think I should maybe try some forced air and see if I can get it even hotter?
 
No need for forced air. It kind of defeats the purpose of a venturi. Your gas pressure at the regulator and the torch tip size can both be changed if needed.
I wouldn't change anything until you have it running inside a forge. I've heard some people say their burners run better in the forge. I think yours will be fine. Another factor on any further mods is the size of the forge you are building.

I like your burner!! I enjoy seeing tools that have been well crafted.
 
I made a stainless burner to. I welded 1/2 of a compression fitting to the one side of the reducer and I can tighten the nut to hold my 3/8 tube in place. But if you are well lined up it should be fine welded. I run a adjustable regulator on my propane supply and you can really tweak the heat and I use that instead of a baffle on the air supply.

Now you need a good forge to use it with. I been using a small horizontal lately instead of my big horizontal. I am going to make a vertical from small propane tank. One nice thing about those is you can make it so the forge body is removable from the base and then just put a good layer of kitty litter on the floor. If you weld damascus any flux that comes off ends up on the floor and doesn't eat up your ceramic forge liner. When ever the kitty litter gets to messed up you can easily replace it.
 
Thanks everyone. I am starting my stainless vertical forge tomorrow. I have some research to do tonight so I can come up with a good plan going into it. I will do a full write up with pics. I already ordered 2" thick ceramic insulation, and a 50 lb bag of 5000 degree refractory coating. Should be a fun project.
 
I got all the parts at my work. We use a lot of stainless steel. But anyone can order the material from Mcmaster-Carr. They sell everything one needs and then some. I'm guessing through them total cost would be somewhere around 35 to 40 bucks.
 
Great burner and excellent fabrication. Ya did a good job. Good luck on the forge.
 
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