It seems that I did skip reading last responses earlier. However I still would like to see the entire piping isometrics on the pipe rack with adequate markups on the condition of the shoe support (axial and lateral displacement, off-support etc...) to be able to see the condition on the pipe on the rack in addition to pressure, operating and design temperature, wall thicknesses and material. You only talk about the expansion loop area only despite there are many expansion loops as you explained. Is the area that you consider can be isolated for the discussion? Verbal explanation would not show the full picture, a markup is essential for this kind of discussion, I would say.