[Jewelry making - Article 00060] - Re: [Orchid] Pressure booster and Natural gas

[James Binnion]

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>     I'm with Judy Hoch...natural gas (NG) and compressed bottled oxygen
>     is inexpensive, available (if you have NG for other uses) without
>     limit, and very convenient. 

    Actually there is a significant danger from not using a pressure
    booster. You cannot buy a flashback arrestor that will function at
    the very low pressure you get from residential or most commercial gas
    services. Flashback arrestors need at least 2 psi to work and typical
    natural gas is supplied at about 1/2 psi. There have been several
    documented accidents where jewelers have blown up the meter/ gas
    regulator because oxygen forced its way back into the gas line and a
    flashback occurred. 

    I know I will probably will get several emails from folks that have
    "done this forever and never had a problem" but if you check with
    your gas company and or fire marshal and tell them exactly what you
    are doing they will have a fit as it is a known danger. 

    This is why you need to get the pressure booster as it will allow
    for the SAFE use of natural gas for torch work (even casting). 

Jim

James Binnion
jbin AT mokume-gane.com
James Binnion Metal Arts
http://www.mokume-gane.com
360-756-6550
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