[Jewelry making - Article 00780] - Re: [Orchid] Still more torch questions

[Dan]

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>         If an acetylene cylinder is transported on its side it should
>     be allowed to stand upright for at least one hour before it is
>     used. This allows the acetone (acetylene is dissolved in acetone to
>     make it more stable) to settle so it won't come out the valve when
>     opened. 

    Acetylene is very unstable and dangerous compressed above 15 psi.
    This is why the Acetylene regulators usually have a red line at 15
    psi. When Acetylene is dissolved in Acetone it can be pressurized to
    a greater pressure, allowing more gas to be stored in the cylinder.
    Inside of the cylinder is a honeycomb of some type of material
    (ceramic?) If the Acetone isn't allowed to settle back down into the
    tank there will be spits and pops from the torch as the Acetone comes
    out of the torch and burns. If an extreme amount of Acetone was lost
    the potential for a serious instability of the Acetylene exists. Hope
    this clarifies things. 

Dan Wellman

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