You have control over the "restrained" versus "non-restrained" portions of the piping system. Check the Quick Reference Guide to see the equations used for B31.8, and when the OPE equation is necessary and when the SUS/EXP equations are necessary.

In the future could you please:
a) Start a new thread for a new topic
b) Post in the proper Forum. This post should have been a new thread in the CAESAR II forum.

Thank you.