[Jewelry making - Article 00435] - Re: [Orchid] Soldering with hydrogen

[Daniel Culver]

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Ray,

    I have done a lot of work with hydrogen and oxygen from bottles.
    First deal with only a large and reputable supplier in your area;
    any dirt or oil accidentally introduced into your bottles (tanks)
    could be a disaster. You will need a hydrogen specific regulator as
    well. Get a good one. Acetylene torches work very well for hydrogen
    and can also (with experience) be modified for specific flame
    characteristics. Hydrogen is both the cleanest for casting, ingots
    and special brazing needs, and the most dangerous thing you may ever
    work with. A good clean flame in nearly invisible and hard to
    adjust, also, there is some doubt as to the efficacy of back flash
    arrestors, but, I say this only from shop talk, no personal
    experience (thank goodness). 

    I always discard any remaining hydrogen (no matter the cost) out of
    doors when I am done; crack the torch valve slowly with a small
    piece of paper clipped over the opening (to see a flame if one
    starts). I also clean the tips with acetone if they haven't been used
    for a while, but take the time to let them dry. Even for brazing, you
    might find rose bud tips of different sizes to be easier to work with
    than single point tips. 

    If you need hydrogen only occasionally, you might find a industrial
    brazing company to do the work for you. 

Good luck and be safe.
Daniel Culver
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