FREE OXYGEN FOR WELDING USING A MEDICAL UNIT MAPP GAS PROPANE OXY ACETYLENE KIT GEAR MINI SET
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- čas přidán 20. 08. 2024
- WHICH KIT? FREE OXYGEN FOR GAS WELDING. Medical Oxygen machine supplies free oxygen. MAPP GAS PROPANE ACETYLEN OXYGEN.
Weld with Propane and Oxygen, rather than oxy acetylene. Propane gas is easy to get hold of and burns really hot, it is a very similar gas to acetylene.
You can usually find a used set of gas welding gear from around £30 to get you started.
Propane is available at most fuel stations or hardware stores.
The mini gas welding bottles are a cheap and convenient alternative.
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link to set: ebay.us/k8fUTv amzn.to/3XY1Q5H
link to goggles: amzn.to/3YJiSFM
link to welding wire: amzn.to/3XHVXJB
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Really interesting to see the different setups. You are like me, looking for different solutions. Just need to work out how to get enough pressure & flow for my oxy propane cutting. ; )
Great idea and find. Like you say the flow rate would be an issue for bigger jobs. Could you build a small gasometer (gas holder) with the water seal method to store the oxygen till it’s needed ? BOC bottle rental is a killer for hobbyists, that’s why I do MMA welding at home.
Great idea. I think I'll buy one for my shop.
@AndyFireBlade - Medical oxygen generators aren't ideal for welding because at max flow purity dramatically decreases.
Those generators are not "free" as they do need replacement of the molecular sieves and filters, which can get pricey, and they have a very limited flow rate and pressure, so you are generally limited to smaller tip sizes and heat output and forget about cutting..
Definitely useful for hobby use, but that said, that little "micro torch" is probably the most useful torch on the bench. Very concentrated pinpoint flame and low flow, so works perfectly with a medical oxygen generator and even the disposable oxygen bottles last for hours of use vs. the other styles of torches where the tips are really too big given the size of the canisters: a full oxygen canister basically lasts for only about 10 minutes of really decent heat, which may be enough for a couple of small brazing repairs, but which is not really economical for actual welding or cutting..
What you might want to investigate are HHO torches, which basically run on distilled water and potassium hydroxide drain cleaner. These use electrolysis to separate hydrogen and oxygen and then you recombine them in a torch and are used extensively in the jewelery industry, and after paying for the machine (or making your own, they are not hard to make) are probably the closest thing to truly "free" welding there is...
great comment thanks andy
I have oxy propane for heating and cutting, but was told you can't weld steel with it because it produces a brittle weld ? Something to do with the hydrogen atoms not burning in the flame, but becoming deposited in the weld ? 🤷♂️
it is not as good as acetylene, but it works if you need it to and dont have an alternative