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john s. gordon » Comments » APL

  • Nibbling on Natural Gas, Concerned about Atlas Pipeline Partners [View article]
    i think the author means 2.50 per million btu/
    > jack
    Aug 23 11:22 am |Rating: 0 0 |Link to Comment
  • Global Warming: Investment Implications  [View article]
    many yrs ago heliarc welding was invented, the purpose being to minimize oxidation of the workpiece.
    however helium is lighter than air so its blanketing capability is not too great.
    for many yrs i've done TIG welding (some people call it MIG) using an argon bottle for blanketing. A40 is denser than air.
    not once have i used a CO2 bottle. CO2 is an oxidizer @ high temperatures, reacts with some metals. last thing you want in your workshop is carbon monoxide.
    > jack
    Aug 20 13:31 pm |Rating: 0 0 |Link to Comment
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