[Jewelry making - Article 00172] - Re: [Orchid] Using MAPP gas for silver work?

[Milt Fischbein]

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>     One should not run MAPP or anything through the same hoses as
>     propane EVER. 

    I have never heard this and suspect that it may not be correct. Both
    propane and MAPP are hydrocarbons and hydrocarbons are generally
    compatible with each other. Also I have used the same hose for MAPP
    and propane on my Bernzomatic torch for over 10 years with no
    problem at all. Has anyone else ever heard this before? Is it 
possible
    that you are confusing this with never running oxygen in a hose that
    has been used for compressed air? The reason is that compressed air
    usually has some oil in it and the which will burst into flames when
    it comes in contact with pure oxygen. 

Regards
Milt
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