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welding to air tank?

Old 05-05-2009, 09:50 PM
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Default welding to air tank?

so, I have a 15 gallon air tank that I was going to use for the on board air system on the Power Wagon, but, It won't fit anywhere in the frame, so, I'm going to have to use a smaller tank. Menard's here has a nice, 5 gallon tank for $20, its your typical made in china portable tank, and will work nice, except for one fact: It only has one set of stabilizing feet... So, I was thinking of buying it, bending up a second set of feet, and welding them on the tank... Any thoughts one way or another? I REALLY dont like the idea of welding on the tank, but, I can't find a tank online, or, in stores that has two pair of feet... OR, does anyone have a brighter idea on how to mount it? I was thinking the other thing Icould do is I could hard mount the one set of feet, and then make a cradle for the other end, and put a bigassed hose clamp around it to hold that end of it down... That's kind of a mickey mouse way of doing it, but, It's under the truck, where no one will see it...

Third option I thought of, is cutting the rear skid plate mount just inside of the 4 mounting holes I drilled on each end, and putting a plate on each cut, so that it ends up making a tank out of the middle section... I just dont really like the idea of the stressed member that holds and supports the skid plate being the on board air tank as well...
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Old 05-05-2009, 10:10 PM
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DO NOT WELD ONTO A HIGH PRESSURE AIR TANK OR ANYTHING HIGH PRESSURE FOR THAT MATTER. Seriously you will get messed up if something goes wrong, never ever ever do it, fab up some brackets to go around it but never weld on it
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Old 05-06-2009, 06:56 AM
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air system for what? air suspension? cause if thats the case theres hundreds of air tanks on ebay for dirt cheap that are made for mounting in cars like this one

eBay Motors: 5 Gallon Tank Airride Air Suspension Train Horn FBSS (item 280340914844 end time May-06-09 235:12 PDT)

i'd go this rout befor ever attempting to weld a air tank its got bad news written all over it mang dont want to see the power wagon end up in peices after all the work you put into it
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Old 05-06-2009, 02:18 PM
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YOU GUYS ARE ALL RETARDED!!!!!!!! that's not a "high pressure" tank.
high pressure is like 2000 psi. not 200. yes, Two Thousand, not two hundred.

How do you think they make those tanks They're welded!!!!!!

If you're not going over 200psi you're fine. i've welded up several tanks.

HOWEVER.... READ THIS.... THIS IS MY DISCLAIMER... if you suck at welding, and you burn through all the metal, then you suck at life and don't do it. You need PLENTY of feed. you want to build up the metal, not just melt it in.

200psi is more than most on board air systems which ussually don't go over 115psi.

the tanks that you DO NOT EVER want to weld are Compressed air tanks such as CO2 tanks, Nitrous oxide tanks, Scuba diving tanks, oxy-acetalyn tanks, helium ballon filling tanks, and welding shielding gas tanks.
The kind of tanks that are upright cylinders with the pressure guage and nozzle on top.
THOSE TANKS ARE DESIGNED TO HOLD 2,000 PSI. You're fine with welding an on board air tank.


here's my truck i had... 178decible train horns. yes.... 178 Db measured. i had my tanks at 250psi. Ebay horns run at 115psi. I ran my compressor as the A/C compressor. (a/c compressors on your car ussually run at 400psi.)
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Old 05-06-2009, 02:22 PM
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Alright boss, I was assuming there was higher pressure than that, but i guess you could weld that, as long as it doesnt leak, 200psi is not to be taken lightly, it is still alot of pressure.
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Old 05-06-2009, 02:44 PM
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I would most likely do a plug weld type weld as well. Drill a hole in the bracket, and then back fill it, so, as to reduce the likelyhood of burn through.
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Old 05-12-2009, 02:53 PM
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shouldn't be a big deal. I've seen people use a tubular bumper as an air tank, too.



Although I am not particularly confortable of the idea of my bumper being a pressure vessel.
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Old 05-13-2009, 11:00 PM
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people do it all the time...you'll be fine.
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Old 05-14-2009, 06:17 AM
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I welded some brackets on my air tank for air suspension no problem. just try to use low temp to keep from burning holes in it. try practicing on some material about the same thickness as the tank to find that right setting.
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Old 05-14-2009, 12:21 PM
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Originally Posted by jackfrost1031 View Post
shouldn't be a big deal. I've seen people use a tubular bumper as an air tank, too.



Although I am not particularly confortable of the idea of my bumper being a pressure vessel.

hahahaha... i wish the DOT would do a slow motion crash investigation of that!
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