Posted by: Ivicom
Creep Stress Evaluation - 08/25/15 03:41 AM
Hi
Can anyone help me with the issue of evaluating the creep stresses according to B31.3 in my system consisting of a A53 Gr.B pipe operating at 500°C.
How do I make sure that I've addressed the creep phenomenon in the right way in my system. What parameters do I need to check to ensure that everything will be OK with the pipe.
Is it enough to just check the SUS, EXP and SUS + OCC stresses and say that everything is OK.
I've read the May, 1993 COADE Mechanical Engineering News and it is said there that we need to include sustained stress intensity in our calculations, but I'm not sure how (what do I actually have to do with this value).
I'm aware that sustained stresses have to be compared to the creep limitations but I don't how to define them.
Thnx
Can anyone help me with the issue of evaluating the creep stresses according to B31.3 in my system consisting of a A53 Gr.B pipe operating at 500°C.
How do I make sure that I've addressed the creep phenomenon in the right way in my system. What parameters do I need to check to ensure that everything will be OK with the pipe.
Is it enough to just check the SUS, EXP and SUS + OCC stresses and say that everything is OK.
I've read the May, 1993 COADE Mechanical Engineering News and it is said there that we need to include sustained stress intensity in our calculations, but I'm not sure how (what do I actually have to do with this value).
I'm aware that sustained stresses have to be compared to the creep limitations but I don't how to define them.
Thnx