=8-0

Pressure and acetylene is something that my welding teacher told me to avoid. If anyone reads no further, avoid pressure and acetylene. If safety infractions are handed out, the above may be a candidate.

Acetylene is stored in acetone solution at low pressure, about 15 or 30 psi because it will explode at high pressures as a gas. Per wikipedia, about 39 psi. I don't know if this is partial pressure or absolute. My guess is partial pressure of the gas. So if by your uncontrolled process, you know the mole fraction (relative abundance) of acteylene the precombustion charge, you multiply that by your cylinder pressure of 0-400 psi, when you get 40 psi, bango! Probably much sooner if it goes by a hot glo plug. I think you'd likely get a detonation like with ether, but possibly do more damage.

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