[Jewelry making - Article 01334] - Re: [Orchid] Different mixtures of Propane

[John Burgess]

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    G'day.
    The NZ plant at Motupipi on the West Coast of the North Island
    processes oil from the local well in Taranaki into a number of
    things, ethane, methane propane and butane etc. (even urea). But in
    processing for propane more butane is made than sales demand, so the
    propane we get in the usual containers is invariably mixed with
    butane. 

    As butane has a higher boiling or evaporation temperature, the tanks
    tend to end with almost all butane at the bottom, when used for
    jewellery. But butane doesn't burn so nicely at the air-propane gas
    mixture that jeweller's torches use, and I find I often have to
    waste the last bit of gas in the container.  And it is quite a bit
    sometimes. 

    It is also used to drive motor vehicles, and most fuelling stations
    sell it.  So, if you don't like it you can go down the road - and
    get exactly the same stuff from the next station. If you don't like
    that, you are welcome to do the other thing!! She'll be right,
    mate  as they say in NZ.

Cheers for now,
JohnB of Mapua, Nelson NZ

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