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@REPLYADDR Jim Wilkins <muratlanne@gmail.com>
@REPLYTO 2:5075/128 Jim Wilkins
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"Bob La Londe" wrote in message news:uf2cj4$3aqmh$
2@dont-email.me...
I have been told more than a certain volume of acetylene in "free air"
can self detonate or detonate from turbulence. I had an accident here
at the shop some years back where there was no apparent source of
ignition. Just somebody in open air sticking their hand in front of the
flow the flow from a cracked valve. ...
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Acetylene`s triply bonded carbon stores a lot of energy and it can explode
without burning, by decomposing into carbon and hydrogen or polymerizing
(combining with its neighboring molecules) into benzene or a metal-like film
called polyacetylene.
https://www.linkedin.com/pulse/guidelines-handle-dissolved-acetylene-cylinders-s
afely-rob-moyer
"This process is referred to as polymerization, and it produces a heat. The
reaction attains self-sustenance above atmospheric pressure, still, it is
strong enough to initiate an explosive acetylene decomposition. Normally,
polymerization commences at atmospheric pressure at temperature 400°C,
however, it can also happen at low temperatures, and in the presence of
catalysts such as rust, pipe scale, diatomite, silica gel, and charcoal."
In other words dirty hands may trigger it. In the cylinder it`s dissolved in
acetone to make it safer.
https://rexarc.com/blog/importance-acetoning-dissolving-acetylene-acetone/
Rapid combustion that`s subsonic, slower than a detonation or explosion, is
called deflagration. (not flagellation)
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