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Conduit Seals: Class I, Divisions 1/2 Groups C & D vs Groups A & B

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    Conduit Seals: Class I, Divisions 1/2 Groups C & D vs Groups A & B

    LNG and Chemical plants are largely Groups C & D. Occasionally, we see a small patch of Gp B (Hydrogen), but the question I have is: are there any significant differences in conduit sealing requirements for Groups A & B locations vs C & D in either Divisions 1 or 2?

    #2
    No difference in the requirement for the locations of seals, but not all seals are listed for Groups A and B. Same applies to other fittings used in Class I, Division 1, Group A & B locations.
    Don, Illinois
    (All code citations are 2017 unless otherwise noted)

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      #3
      Originally posted by don_resqcapt19 View Post
      No difference in the requirement for the locations of seals, but not all seals are listed for Groups A and B. Same applies to other fittings used in Class I, Division 1, Group A & B locations.

      Thanks for the input.

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