Dave, you are right. The only thing that is not clear for me is why the EXP load case (OPE-SUS) is not equal in stress result with T load case.The only explanation that I have is that T alone make no sense. The pipe will try to expand where it can, even up. Therefore we will have vertical displacements even where they do not exist. If these displacements do not reflect reality, the stress will not reflect reality because is directly related to displacements.

Maybe I can not make myself clear, sorry for my english.

Best regards,