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Thread: Tank cost

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  1. #1
    Join Date
    Jul 2007
    Posts
    115

    Default Tank cost

    Buying Dynasty 200DX from Cyberweld.

    I have a price of $250.00 for a full tank of 330cu argon, tank included
    (sold to me) from the local Etox welding supply.
    What is the shelf life of ARGON?.
    Also to trade my 80 cu ft Mig 75/25 gas for fill is $22.00.

    I have decided to go water cooled tig but not to buy the pakage as I wish to buy a "used cooler" different torches etc. I think the price will be a little less also, correct me if I am wrong.

    Any thought on these prices.
    Argon tank will have 5 yr. cer.

    God Bless
    John

  2. #2
    Join Date
    Sep 2005
    Location
    16919 Pole Rd. Brethren, MI 49619
    Posts
    4,364

    Default

    Thats probably a bargain.

  3. #3
    Join Date
    Oct 2006
    Location
    Illinois
    Posts
    588

    Default

    For my area that is good. Location makes a difference.

  4. #4
    Join Date
    Sep 2005
    Location
    northern NJ
    Posts
    1,794

    Default

    In my area the LWS won't sell 330cu cylinders anymore, only lease them. The largest they now sell is an 80 cu.
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  5. #5
    Join Date
    Jul 2010
    Location
    Salem, NJ
    Posts
    271

    Default

    The argon basically has a permanent shelf life as do many single filled tanks. When you start mixing tanks then you have a shelf life. Gases even though we can't see them have mass/weight to them even though on a micro level. So if you get a 75/25 argon/co2 then the CO2 will sink as the argon rises over time. It will not happen overnight but you can't expect a true 75/25 mix out of a bottle that has sat in one spot for a year.

  6. #6
    Join Date
    Jul 2010
    Posts
    374

    Default

    Quote Originally Posted by Country Metals View Post
    Gases even though we can't see them have mass/weight to them even though on a micro level. So if you get a 75/25 argon/co2 then the CO2 will sink as the argon rises over time. It will not happen overnight but you can't expect a true 75/25 mix out of a bottle that has sat in one spot for a year.
    I think you're mistaken here. 75-25 might "go bad" for some reason (although I can't imagine why) but it won't go bad because the gases separate. That's physically impossible.

    75-25 is a solution of two compressed gases (meaning that it is perfectly, evenly, homogeneously mixed) and it will remain a solution until the end of time, whether the tank sits in one place or not. IIRC, the Ideal Gas Laws dictate this.

    Colloidal suspensions (like paint or smoky air) will separate, but solutions almost never do.
    Last edited by Helios; 11-27-2012 at 09:35 AM.

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