When you work under B31.8 code, the template shows (proposes) T (derating factor) value corresponding to the temperature declared, instead to show the "classical" SH fields as when you consider other piping codes.
You enter also Fac- construction design factor- in that template, SMSY, etc.

When you work under B31.8 Ch VIII, the template maintain "SH" fields, but shows (proposes) there SMSY*T, I cannot explain why this was the choice. [I understand this is the yield stress at operating temperature, I do not understand why is not the same approach for both B31.8 and B31.8 ch VIII templates]
Buy anyway Caesar docs get the clarification: under B31.8 Chapter VIII Code Stresses explanations, please see the Note: The product of S and T (i.e. the yield stress at operating temperature) is required in SH of the CAESAR II Input."
You enter also Fac-Hoop stress design factor, etc.

Important is the result. Have you checked the correctness of the final result of Sh limit?

Best regards.