- Thread starter hypertherm69
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Barking Mat
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Yeah, I was wondering that.
Well actually it’s not the propane or the acetylene that cuts, it’s the oxygen!
The fuel gas just raises the temperature sufficiently that the metal that you our are cutting starts to burn in the oxygen, and the heat from that reaction keeps the metal hot enough to burn.
The trouble with acetylene is that it will detonate if a free gas and above a certain pressure which is why the bottles store it dissolved in another medium. Keep your a acetylene pressure down to not more than 4 or 5 PSI
The fuel gas just raises the temperature sufficiently that the metal that you our are cutting starts to burn in the oxygen, and the heat from that reaction keeps the metal hot enough to burn.
The trouble with acetylene is that it will detonate if a free gas and above a certain pressure which is why the bottles store it dissolved in another medium. Keep your a acetylene pressure down to not more than 4 or 5 PSI
Barking Mat
Cuddler of hedgehogs.
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I can get severance at about 22mm, but not 85cm's.
8ob
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- Nescient in the vale
mtt.tr
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i was waiting for this comment
mtt.tr
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when i was 15 i worked in a dive shop and did the nitrox mixing, i would never ask a 15 year old to mix nitrox the risks and liability mental. young and dumb you dont think about the risks
Brad93
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90mm Hardox.
A bit over the remit of a 1/16” tip on acetylene.
This is where propane starts to get more economical and efficient than acetylene. Technically you can do about 6” thick steel with Acetylene. 6/7psi of Acetylene, 50/60psi of oxygen through a 5/64” nozzle.
A bit over the remit of a 1/16” tip on acetylene.
This is where propane starts to get more economical and efficient than acetylene. Technically you can do about 6” thick steel with Acetylene. 6/7psi of Acetylene, 50/60psi of oxygen through a 5/64” nozzle.
Oxygen cylinders can act like rockets if they fall over and the valve breaks. Just the shear pressure and mass of gasses suddenly escaping from the relatively narrow cylinder neck can propel it at dangerously high speeds about the place. And a full size O2 cylinder is pretty darn heavy !
Not sure if it has been mentioned yet but you should NOT use kit designed for propane with acetylene gas! That includes hoses, flash back arrestors, regulators & as you found out, cutting nozzles!
There are also substances in propane that will damage gear designed for acetylene.
Acetylene is stored in the bottle dissolved in acetone, if you use it with kit designed for propane it WILL quickly rot your hoses, regulators, etc!
Either buy yourself the proper gear for acetylene or switch to propane. Unless you are planning to gas weld propane will do any cutting just as well plus its safer, easier and cheaper to buy.
TBH it sounds like you need someone more experienced to look over your existing gear, check if it is correct & advise what you need to change. It's not something that should be left to a beginner as it can be very dangerous if it goes wrong!
There are also substances in propane that will damage gear designed for acetylene.
Acetylene is stored in the bottle dissolved in acetone, if you use it with kit designed for propane it WILL quickly rot your hoses, regulators, etc!
Either buy yourself the proper gear for acetylene or switch to propane. Unless you are planning to gas weld propane will do any cutting just as well plus its safer, easier and cheaper to buy.
TBH it sounds like you need someone more experienced to look over your existing gear, check if it is correct & advise what you need to change. It's not something that should be left to a beginner as it can be very dangerous if it goes wrong!
hypertherm69
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right when I originally bought the kit, i was going to use propane. But since the man insisted on acetylene and it was 38 pound a refill, also people saying it was better that's what i got. I then went and bough the correct hoses, regulator and was going to buy new tips till i read somewhere you could use propane tips so i didn't. I bought what I thought was a complete set for op, so i thought the check valves were either built in or weren't necessary.
as long as the tanks are kept as far away as possible and there aren't any leaks, with hoses not under where your cutting. flash back arrestors fitted, acetylene pressure is kept low enough and no oil/grease near by it should be alright?
Pete.
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What poses the greatest risk with acetylene is that it has the highest flammable range of any common fuel gas. LEL is just 2.5% and UEL 100%, that means it will explode at concentrations where other gases are either too rich or too lean to ignite.
Basically, don't keep it inside or next time you open the shed and turn the lights on it might turn your own lights out - permanently. This guy below had a bottle leak in his car, when he hit the window switch it blew all the bodywork off.
https://www.garagejournal.com/forum/showpost.php?p=1941027&postcount=55
Basically, don't keep it inside or next time you open the shed and turn the lights on it might turn your own lights out - permanently. This guy below had a bottle leak in his car, when he hit the window switch it blew all the bodywork off.
https://www.garagejournal.com/forum/showpost.php?p=1941027&postcount=55
Wonder why they cut it with the piece vertical?
