Duplex Long weld neck flanges as per PD5500 Enquiry Case87
Duplex Long weld neck flanges as per PD5500 Enquiry Case87
(OP)
Hi All,
I'm designing a pressure vessel to PD5500 with a MDMT of -45C which requires a 24"NB RFLWN manway with a 60mm thk nozzle neck. Enquiry Case 5500/87 of the code states a max thickness of 50mm for temp range of -50C to 0C. I'm assuming this statement is for the vessel shell/head as my vessel thickness is less than 50mm thk. Pls can someone throw more light on this or direct me to a text where i could get more educated on this as i've come accross it a couple of times.
Thanks in advance.
I'm designing a pressure vessel to PD5500 with a MDMT of -45C which requires a 24"NB RFLWN manway with a 60mm thk nozzle neck. Enquiry Case 5500/87 of the code states a max thickness of 50mm for temp range of -50C to 0C. I'm assuming this statement is for the vessel shell/head as my vessel thickness is less than 50mm thk. Pls can someone throw more light on this or direct me to a text where i could get more educated on this as i've come accross it a couple of times.
Thanks in advance.





RE: Duplex Long weld neck flanges as per PD5500 Enquiry Case87
Also, it appears that the case 87 has been withdrawn, perhaps it was far too restrictive and thus irrelevant to other duplex steels.
Cheers,
gr2vessels
RE: Duplex Long weld neck flanges as per PD5500 Enquiry Case87
fizzy.