I am still thinking that Caesar does not well enough this verification,without the aim of beginning a technical argument.
What is the purpose of it, for the same piping, for the following four models, the results of the occassional stress are different?

Model 1: with T1
Model 2: with T2
Model 3: With T3

Model 4 : With T1, T2 and T3.

Best Regards!