good on you man

yes it could have been ugly... there's lots of dim wits out there not doing it right!

The regulator is not a back blowout device like a gauge.

it lights the hole in the valve, like a tourch, but it 'burns' if the tank gets too hot, there is a pressure valve, or a bolt with wax or a disc of metal in the hole, this 'blows' and lets the pressure disapate safely( there is one at the top, but there is also a 'burst disk' at the bottom of the tank, this saves the explosion, and lets a waft of gas burn, a fire, yes, but no bomb, which could raze the whole building).

@@andyvan5692 YES! Thank you for this information! I'm a writer writing scene where someone essentially makes an improvised explosive involving these mechanisms and I wanted to know if it made sense. Thank you.

​​@@formidablefriend8228I did what you just asked in the question when I was a kid. It just burns like torch without the oxygen.I got lucky it was a empty acetylene cylinder that had little bit gas left.

Dale Cocking hi

It is

Do you know "arcair" ? Nice and safe to , but for me I'd like to do everything

Teflon is a brand name. It can be many different things. But what I think we are talking about is PTFE tape that is used to seal pipe threads. PTFE can be used in direct contact with oxygen, but it will burn if set on fire. I know this because it was in the Apollo 13 report. Teflon insulation was used inside the liquid oxygen tank in direct contact with liquid and gaseous oxygen. This was fine. However a damaged relay caused the wiring to overheat. In air Teflon will not burn, but in contact with 100% O2 it caught fire and the tank exploded. I've seen seals in equipment designed to use acetylene made of Teflon so I know it's compatible with that as well. And of course, PTFE lined oxyacetylene hose sets are a thing. So there is no compatibility issue between either O2 or acetylene and Teflon. The rule about no Teflon tape is actually very simple. Other things you should not use are pipe rope or anything other thread sealant. This is because all of those are for use on pipe threads. Its quite obvious to anyone who looks at the fittings that they are not pipe threaded. The seal the end of the fitting and a seat under pressure provided by the threads. So winding Teflon tape over the threads does nothing except create the possibility that Teflon tape could get on the sealing surface and prevent a good seal causing a leak. Knowing how the fittings work, it seems downright crazy that anyone would try to use Teflon tape (or pipe dope) on these kinds of lines. But at a previous job ,we had equipment that used hydrogen. It was plumbed from a manifold in a special room where the cylinders were kept, through specially built copper pipes to fittings in the labs. A regulator was installed at that point that fed copper tubing that was connected with swagelock fittings. Swagelock fittings are compression fittings that swage a brass ferrule to the copper tube and press it against a seat to make a seal. So the sealing surfaces are between the copper tube and the ferrule that is swaged onto it when the fitting is first tightened, and the ferrule and the seat of the mating connector. And what did my boss do when one was leaking? Did he cut it off with a tubing cutter and install a new swagelock connector from the cabinet that contained literally thousands of them? No, we wrapped the threads in Teflon tape and assumed it was good without even bothering to check for leaks. So yea, people are that dumb. So that's why they always say not to use Teflon tape.