[Jewelry making - Article 00172] - Re: [Orchid] Lighting the Little Torch

[Ian W. Wright]

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    I was always tought that the gas must be turned on an lit first,
    getting a stable flame before the oxygen is turned on. Generally I
    find that it is very difficult to light a torch with the oxygen on.
    To turn off, the Oxygen must be turned off first otherwise there is a
    risk of explosion. On the odd occasion when I have turned the gas off
    first on my big oxy/propane torch, the flashback arrester on the gas
    supply has always tripped indicating that the gas has burned in the
    hose! After the flame is out, I always purge the hoses by shutting
    off the valves at both the propane and oxygen cylinders, opening the
    gas valve on the torch to release pressure and then gradually opening
    the oxy valve on the torch which uses the pressure of the oxygen to
    suck the remaining gas out of the hose. Finally, I shut off both
    torch valves again giving 'double safety'. 

Best wishes,
Ian
Ian W. Wright
Sheffield   UK


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