Hi,Coade‘s Engineer
I have read your company's Technical Reference Manual about Hot sus and non linear restraint.
From a technical manual, you have the view seems to consider french petrochemical code's view is suitable, using the L5 method is not your intention, but you could not guarantee that everyone agree with your view, so you Allow engineers to define the case According to their company's specification.
I understand it right?
If what i understand is right ,i agree with the french petrochemical code's view,the vary value from cold to hot state is an expansion range,not a primary stress