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

[Dale001289]

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?

 

[don_resqcapt19]

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.

 

[Dale001289]

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.