B31.3 states the allowable for min to 100. So your material is 16.7 ksi SC and SH for -425F to 100F. Try material 196 and set your code to B31.3.

Load cases should be the same. If you have a cold T1 and a hot T2 (steam out?) you must do an expansion case for T1-T2 for range.

Enter cold displacements just like hot. The pipe or equipment is shrinking instead of growing.

Make sure that your pipe supports are designed for cold service to prevent moisture entry and icing.

Regards, John