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Ok, thanks to you... I will try to obtain more informations from the customer and work on your ideas... Have a nice day

Thanks for your answer. If I understand what you say, the final thickness is the value for : - (Fc>Sc+St) or (Fc>Sc and FC>St)? Is it right?

Hello, My questions is about the appendix E of the API650 (11 std) : - The formula 6.2.2.3-1a give us the allowable longitudinal shell-membrane compression stress : Fc=83ts/D. In this formula, what is ts? the thickness of the first course of the shell or the thickness of the plate of the...

Thanks a lot for your answer. The use of Z factor is now clear for me ^^ But on the thickness of the shell, I'm not really sure to understand. If the better method is to thicken the annular bottom ring, why my customer apply an extra thickness on each shell course? For example I have calculate...

Hi gentlemen, Please excuse me in advance for these beginner's questions, but I need to understand the API650 (version 11) code which is used by our customers. I think of having succeeds in understanding the formulas and the typo mistakes but there remain to me these questions: - When we...