[Jewelry making - Article 00723] - [Orchid] Flashback arrestors and low-pressure natural gas

[Ed Howard]

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    I am asking those who connect their torches directly to a standard
    utility low-pressure natural gas line, "What kind of flashback
    arrestor are you using on the natural gas line?" 

    My company is working with a US natural gas utility that is having
    problems with jewelers exploding gas meters due to flashbacks. The
    problem seems to be that most flashback arrestors require at least 2
    psi to move gas through the protective device. With standard gas
    service in many areas being 1/4 psi, gas flow is completely blocked,
    so jewelers are omitting the device altogether so they can get the
    gas flow they need to operate the torch. 

    When a flashback occurs the gas meter literally explodes and if a
    person were nearby she/he would be severely injured. 

    If you are successfully using a flashback arrestor (not a check
    valve) with low-pressure natural gas, what exact product are you
    using? 

Ed Howard
G-TEC Natural Gas Systems
www.safe-t-gas.com


 
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