yes i know that.
but by putting the oxygen into a propane tank he added fuel into the
normaly there is no oxygen in the actylene and no fuel in the oxygen and the
flame can't travel up the hose.
but if you add oxygen to a fuel tank it can travel up the hose and past the
if you don't believe me.....try it.
take an oxygen cylinder and attach it to a used propane tank.(you'll need to
put a reversed thread on for the propane tank)
fill it. now use the propane tank as you normaly would use an oxygen
I have never heard of a cutting torch like that. The standard around
here is Oxy-Acetylene rig. A few people around here use Oxy-Propane
cutting torches. Most use 40 pound RV tank, or a fork lift type tank. I
have seen a few that use a regular gas grill style 20 pound tank.
Have any links to the Gasoline-oxy rig?
Thanks. I e mailed the link to my business partner. The one who does
all our torch work. We probably dispose of around 60 gallions of gasoline a
month scrapping cars.So for us, the gasoline would be free.
The regulator valve or the oxy tank valve? You're supposed to open the oxy
tank valve all the way.
"3. Open the oxygen cylinder valve very slowly until the regulator high
pressure gauge reaches its maximum reading, then turn the valve all the way
open. The oxygen cylinder valve is turned all the way out because this
valve has a double seat or back seat. In the all-out position, theis seat
closes any possible opening throught which the high pressure oxygen might
escape along the valve stem."
Modern Welding: ISBN 0-87006-433-9:
Flash backs can occur in the torch and travel back. That's' why
the best setups always include flash arresters.
"This reverse flow of the flame is called, "FLASHBACK". It can cause hose
fires, regulator ruptures, and fuel cylinder fires".
Notice the book said fuel cylinder fires. Because of this, if you only have
the bucks for one arrestor, get one for the fuel tank. But, they make them
for both. Typically, any problems with the oxy side will be because of
overpressure of acetyline, which should never be more than about 15psi.
Another good tip is too never stand in front of your regulators. If they
blow, they'll put that adjustment screw right through your head or chest.
The bottom line is, nothing is perfect and anyone messing with this stuff
should be super carefull. One thing I didn't see mentioned here is the use
of inert gas as a safety precaution. It's is best to have a big ol' tank of
nitrogen handy for purging. Gas can't explode in the absense of oxygen.
Pump a buncha nitrogen into, say, a muffler you're going to do some
welding on. I had a coworker who lost his beard and some pride to a muffler
that had some unburned gas fumes in just the right concentrations when he
fired that torch. In another episode, a worker was killed and a small
building partially destroyed when an oxy/acetyline rig blew one of the
regulators because someone didn't relieve the pressure behind the regulators the
previous time they were used. Shit happens. Don't let it happen to you.
I knew that, but, since I did it as an apprentice, and promply got my ass
chewed out for it, in the years since, only open it about 3 turns, and thats
not fully open...but for brazing on CU its more than enough to get the job
done...since we dont crank the regs up high anyway...
On the acetyline side, I can see it..not on the O2 side...
And again...can not see it on an O2 line..
Good god...15PSI would require so much o2 that I would have a flame large
enough to braze CU from 15 feet away, and start a damn good fire.
We have to use Nitrogen for a purge gas. Our reasons are different from
others. We use it to remove any air in the copper that will lend to flakes
in the lines once we seal them due to oxidation. These flakes then clog
metering devices and such and make a general mess in the lines.
CO2 can be used as well, but we prefer to use that for blowing out
condensate lines that are gummed up.
Yep, we had to do the same thing tig welding ss tubing. That's the whole
pricipal behind gas shield welding. Unfortunately, I had to quit welding
due to potential eye probs. Oh well. I can still drink beer! :)
S.S.I.N. spilled my beer when they jumped on the table and proclaimed in
Are you 100% sure that the tank had just O2 in it? (O2 = Oxygen, in the
rare case no one knows...) O2 by itself will not burn. For a fire to exist
you need something combustable (Paper, gas/oil, propane, magnesium, etc.)
Holding a lit match in front of an Acetalyn torch with only the O2 on will
just cause it to burn faster...(which is basically how NO2 works. :) )
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