In article vSdzf.496702$084.153837@attbi_s22,
"Dave Lyon" wrote:

"AL" wrote in message
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Doesn't acetylene combust spontaneously at around 15psi?

I hope not. I got about 250 psi in my tank right now.

Does it have to be in the presence of oxygen?

Yes, no oxygen, no fire.

Dave, you might want to review some basic gas welding books...

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