With regards to welded piping attachments (structural shapes specifically, plate, etc), I have a project were MDMT = -20 deg F. Per my reading of B31.3, A36 and A992 materials Min Temp per Table A-1 puts you into Curve A of Fig. 323.2.2A and this states a design minimum temperature of ~+15 deg F for materials <= 0.394". According to this, impact testing would be required to use this material.

I believe this applies to welded pipe supports as well per Section 321.1.4 stating "Permanent supports and restraints shall be of material suitable for the service conditions"

Interestingly, our customer's own standards show A36 and A992 material for welded pipe support attachments and have no indication regarding additional impact testing.

Anyone here dealt with this before? Am I missing something here?