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  • #16
    Originally posted by blazehaze69 View Post
    The neck ring is blank (customer owned), and the bottle is grey- which sometimes doesn't mean a lot...
    Different suppliers have their own color codes...

    was hoping they left us a clue....
    .

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    • #17
      N2 is great for purging refrigeration systems, and coming out of a tank it will be dry (no H2O to speak of). At low temperatures it is relatively inert, but the way I think of it is that nitrides nitrates and all that stuff tend to happen at higher temperatures.

      For purging a gas tank or a refrigeration system it is the nuts, but I would only reluctantly use it on SS as a back purge.

      Thanks for the papers, they were good reads.

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