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cheetah air tank

8

88-1175

Member
in need of a way to blow up tubeless tires,tired of using ether.thought I could make one from a old 30 gallon propane tank,have a few laying around but how do ya get all the propane out before welding on it ?????
 
I would use an air tank from a semi. They are fairly small, no propane to deal with, and are rated for the pressure.
 
open all places possible, burn in brush fire while staying far away, then cool, weld.
 
I had an potable air tank for filling tires. I cut a hole in it and welded a pipe fitting on. Works great and was an easy build.
I once cut up a propane tank but can't remember how I did it. I think I took the valve and used a sawsall. I may have filled it with water.
 
A 20 lb bottle is all you need. Just unscrew the brass vavle and install a 1" ball valve. Add the aprpriare fittings to allow for a fill valve stem and a flared outlet.That's what our local shop uses.
 
I have welded on them, take all the fittings out and stand them upside down outside for a month. Propane is heavier than air, it will all be gone.
 
Not to discourage you from "recycling", but another thought, I bought a generic one on fleabay a couple of years ago for not much more than a 1.5" ball valve and a couple of fittings would have cost locally. Dunno if any can be found cheap right now.

Works slicker'n snot. You'll wonder how you got along with it.
 
Propane IS HEAVIER THAN AIR!!!!! I it up my basement one time, but survived. Went all electric right after that. BE CAREFUL!!!!!!!!!
 
Be careful welding on a tank. It will hold about what 175 PSI. If you weaken it and it should explode, the results will be catastrophic.
 
The China outlet store[Harbor freight] sells them pretty cheap. I would buy one of them before risking an accident trying to make a redneck one. If you try to make your own you will need to find the valve that lets the air out super fast.
 
Back in the middle seventies I made an air compressor out of a 100 lb propane tank. I left it open for several weeks, then welded away on it. Maybe I got lucky. My air pig is a small air tank I welded a bung into the end of. It's used all the time in the truck shop and has served us well but if there is a next time I will buy one ready made.
 
(quoted from post at 21:32:49 12/09/16) I had an potable air tank for filling tires. I cut a hole in it and welded a pipe fitting on. Works great and was an easy build.
I once cut up a propane tank but can't remember how I did it. I think I took the valve and used a sawsall. I may have filled it with water.
Click to expand...

2X what Red says. I have used one just like it a few times at a nearby shop.
 
I bought a bead cheetah ready to go for under $50. He spout has the lip to hold it tight on the rim.
 
You can buy these things for about what it takes to buy the 1.5 inch valve and other stuff you need to make 1.
 
If you can buy one for 50-100 bucks as others have suggested, definitely go that route. I made one out of a 20# propane tank..... but the thing with propane is that it makes it's way into every pore of those tanks. Even if it's empty. Even if it's been sitting for an extended period of time.... there will still be enough gas in there to give you a very exciting experience if you pierce it with flame. I washed it out with water, filled it with water then cut it like that. A hole saw would probably be a better fit tho. A 1.5" ball valve is the bare minimum to make those things work if you're trying to inflate truck tires. 2" would be better. I used 1-1/4" and it doesn't work all that well...
If you do go welding on a tank I would suggest that you hydro test the tank/welds before using it by filling the tank with water and then pressurizing it. If it does leak or rupture there will be very little stored energy in the tank because it's full of water...

Rod
 
I weld them fairly often. I remove the valve) not easy - I strap the bottle down and use a six foot cheater on a pipe wrench) then fill it with water, then dump it out. All propane is gone then, but some odorant remains. If the odor bothers you (it does me) put a touch of Clorox in the water as you fill the bottle.
 
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