Hi.

You have to specify minimum design temp for obtaining flexibility. My advice is that, you have to look in to support location, some time if we place support at wrong place, then it will generate additional force and moments in min temp case. Whereas during operating or maximum design case, pipe may not rest on that particular support due to thermal expansion. Hence nozzle loads are allowable in operating and max design temp case.

First you can check with nozzle option (WRRC 297).

Regards
Venkadesh