[Jewelry making - Article 00502] - Re: [Orchid] Safety Tips for Oxygen & Gas Tank

[jesse Brennan]

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    I as always seem to agree with Peter's extensive correct knowledge
    of the things he works with and I do with this as well. I worked as
    an Engineer and in operating management in the industrial gas
    industry for well over 40 years. I was a going to make a similar
    observation on oxygen cylinder dangers but just didn't comment. Full
    High pressure cylinders of all types cam fail ripping open in an
    external fire, This fire never appears to originate with the cylinder
    that fails but with an external fire often caused by trash. Fuel gas
    cylinders are a bit different but fires they get involved usually
    have started in an external fire also often in trash. Acetylene is
    the only fuel gas approved for use in shipboard use for the density
    reason. You need to be careful with acetylene cylinders - They first
    need to have a good appearance. If they are ill maintained and rusty
    they may have other problems and all vendors do not take good care
    of these cylinders. Don't accept bad looking ones. These cylinders
    have fusible relief plugs that melt at relatively low temperatures
    (say 212F) which relieves the contents and prevents over-pressure.
    These sometimes leak -- there are varying numbers of these depending
    on the cylinder type- they can be located near the valve and also in
    the cylinder bottom. Visual condition and Leak checking with soapy
    water will find these. A thin soapy water solution is fine and has
    been used for years. The common dishwashing detergent JOY or Dawn is
    fine for this. The solution should be thin and doesn't need much
    "soap" it can be applied with a soft brush (the small cheap chip
    brushes work fine ) or a spray bottle. For years the original Ivory
    soap was the base of choice now I say JOY. Soapy water with Ivory
    soap was even the compressor lubricant for High pressure 3000 psi use
    in my time. I am sure it is still used some places in the world
    today. Not much in the US if at all. This only supplements Peter's
    advise not replaces it.

jesse
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