Hello everyone.
A colleague of mine was ordered to do the design checks for a customer as per Division 2 for a welded pipe and a flanged connection of L485M steel under internal pressure and external bending moment in a temperature range of -20°C to 60°C.
The design checks for the pipe as per Pt. 4 already failed (excess of 20%), so a detailed FE-Analysis is required. However, what is really unclear to me is whether the specified steel is in compliance with the ASME standards or not, as the yield to tensile ratio is high (0.93). I am really in doubt regarding the allowable stress principles as stated in Sec. II Pt. D. If I recall correctly, the stress tables hold for a maximum YTR of 0.625. Does the code even allow the use of steel with higher YTR?
It would be very kind if someone could provide some more insight / guidance as I am getting the feeling we are getting on thin ice here.
A colleague of mine was ordered to do the design checks for a customer as per Division 2 for a welded pipe and a flanged connection of L485M steel under internal pressure and external bending moment in a temperature range of -20°C to 60°C.
The design checks for the pipe as per Pt. 4 already failed (excess of 20%), so a detailed FE-Analysis is required. However, what is really unclear to me is whether the specified steel is in compliance with the ASME standards or not, as the yield to tensile ratio is high (0.93). I am really in doubt regarding the allowable stress principles as stated in Sec. II Pt. D. If I recall correctly, the stress tables hold for a maximum YTR of 0.625. Does the code even allow the use of steel with higher YTR?
It would be very kind if someone could provide some more insight / guidance as I am getting the feeling we are getting on thin ice here.