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I've looked at Gullco and Phoenix ovens and every model is electrically heated. I've got a free supply of natural gas. Any ideas on welding up a rod reconditioning\holding oven powered by gas? I know the low hydrogen rods would appreciate it. I believe 50# capacity would be more than enough.I'm thinking a heat exchanger type of inside\outside chamber. Any thoughts from Welding Web members would be greatly appreciated.WeldingWeb forum--now more sophomoric banter than anything else!
Reply:My first though is that the natural gas combustion may produce moisture initially, don't know the chemisty/physics here, but I think I see moisture when I first start warming up my oven at home. Exposing the rod to moisture would then require a higher temperature bake-out.Secondly, I wonder if hydrogen may be introduced into the oven if combustion is not complete.You're idea of a heat exhanger would isolate the chamber from the natural gas burner and solve any contamination potential.
Reply:Yup, a combustion process burning a hydrocarbon (gas, oil, natural gas, etc) -will- produce moisture as part of the combustion process.So you would have to use a heat exchanger of some type to keep the combustion gases out of the actual oven chamber.And then you have to be able to set and control the temperature pretty well. So you'll be cycling the burner on and off, or setting up a staged-burner arrangement (low output burner for 'holding' at temp and a higher output burner for getting up to temp).Then you have the issue of exhaust gas venting, intake air for the burner(s), etc.How much time and effort and money do you want to spend on this project? Yes, I think it -could- be done. But it's not going to be 'just weld up a metal box and turn a flame onto it'.What's so wrong with an electric rod oven? Yes, I know you said you can get natural gas for free, but once the rod oven gets up to temp it really won't take much power to keep it there if it is reasonably well insulated.How about this one? http://www.fastenal.com/web/products.ex?N=999601017
Reply:You could make a box in a box or tube in a tube and seal the door opening so no combustion gasses would contaminate the rods. Small version of a gas oven. Insulate the outside. Use a gas oven burner and control and run a vent if needed. Not sure you would need a vent, a gas stove doesn't need one. Or a vent-less gas heater. Hope this is some help. How do you get free gas? What temp do the rods need to be to keep them dry and what rods need to be in the oven?Doug
Reply:I just watched ebay till I got my Phoenix DryRod 50# box. $100 and uses 120volt. Wouldn't certify because it only keeps a toasty 250 degrees, good enough for what I'm doing !! Like was said, once it's up to temp (a few hours) it uses very little power.edit...Waldarosa, used to keep low/hydrogen rod dry. Don't really remember but seems like the rod ovens had to hold 300 degrees to certify.Last edited by olddad; 09-21-2007 at 04:20 PM.Anything worth doing is worth doing RIGHT
Reply:Looked up AWS D1.1 Structural Welding Code, storage/exposure/baking depends somewhat on which type of low high rod, but the following applies to 7018.1. Shall stored at temperature of at least 250 F.2. If exposed to atmosphere for more that 4 hours must be redried (baked).3. Bake for at least 2 hours at 500 to 800 F.4. Electodes shall be rebaked no more than once.5. Electrodes that have been wet shall not be used.
Reply:Originally Posted by pulserLooked up AWS D1.1 Structural Welding Code, storage/exposure/baking depends somewhat on which type of low high rod, but the following applies to 7018.1. Shall stored at temperature of at least 250 F.2. If exposed to atmosphere for more that 4 hours must be redried (baked).3. Bake for at least 2 hours at 500 to 800 F.4. Electodes shall be rebaked no more than once.5. Electrodes that have been wet shall not be used.
Reply:I have welded with 7018 only kept in the rod guards for many years. I bought a drier or rod oven from Tozzi at Zaps. It sez 300* and do not unplug. I plug it in one day a week. The rest of the time its nice to take out rods I can handle. It does go to 300, I checked it with my Raytec infared thermometer. Its 300 at the bottom and 250 at the top. It works great for me. I can tell the difference in the rod. I can run my V350 on buttery smooth (arc force -10) with out it sticking. I can keep a short arc, so I can run more amps. I always kept a fresh unopened can on the shelf for important or bigger jobs.....Still do.Real world weldin. When I grow up I want to be a tig weldor.
Reply:Ahhhhh Buying and Selling in the parking lot eh? ...zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:You tell me how I can work out one of those free natural gas deals and I'll pay for the electricity that it takes to run a rod oven.
Reply:Originally Posted by tresiYou tell me how I can work out one of those free natural gas deals and I'll pay for the electricity that it takes to run a rod oven.
Reply:Budweiser, and beef stew.Disclaimer; "I am just an a$$hole welder, don't take it personally ."
Reply:I have a 1 mile deep Medina natural gas well located on my property. It's hooked into a pipeline that feeds the PPG glass plant in Meadville. By PA state law, I get 1\8th of the royalties from the well, and all I can use for free...building heat, cook stove, domestic hot water, clothes dryer, standby generator, BBQ, heated pool, fireplace, etc. Even lights, if I wanted them. Plus more uses I'm sure.There's lots of gas wells in these parts. A local hardware store sells all the DIY parts and equipment you need to utilize this underground resource. It seems only natural that I would want a rod oven fueled by gas. Get it? So far my thoughts are weighing towards a horizontal pipe within a pipe set on a chest high stand. That would give plenty of space for a regulator and thermostat underneath, vent on top. Any better ideas?WeldingWeb forum--now more sophomoric banter than anything else!
Reply:Buy an old gas kitchen oven, put it outside, pipe it up and load up with a couple hundred pounds of rods. Temp controls already built in, no venting issue, plus you can cook on it while you're welding.TeddCoHTP Microcut 400 & Invertig 160DC Smith Dual Guard MD-510 OA Rig Lincoln SP135+ Hobart Stickmate LX 235/160
Reply:Natural gas generator. Electric rod oven.Syncro 250 DX Dynasty 200 DXMM 251 w/30A SG XMT 304 w/714 Feeder & Optima PulserHH187Dialarc 250 AC/DCHypertherm PM 1250Smith, Harris, Victor O/ASmith and Thermco Gas MixersAccess to a full fab shop with CNC Plasma, Water Jet, etc.
Reply:It seems that the AWS rules are MORE critical than the us Navy, for 110-18 rod ! It (110-18 can be out of the oven 9 hours ! )...... for regular welding ,i have had 70-18 with enough moisture in it to pinhole VERY badly, then bake some of that lousy rod in my electric kitchen stove ,at about 300 degrees for about an hour or hour and a half , then weld beautifully 
发表于 2021-9-1 00:55:50