press breaked shell

[rhino10]

I'm working on a high pressure vessel with a 20"od and 2"thick walls. I'm having trouble finding a suitable shell and I am looking into using a press breaked shell. Is this acceptable as for as asme is concernered. How would i do shell calcs if it is, div 1 style.
From what i gather it is a number of small angular bends intead of a smooth radius.
Please correct me if i am wrong on this assumption.

 

[unclesyd]

You need to post this question in forum794 and red flag this one.


Instead of going to that trouble I would try to locate a 20" sch 160 pipe. The wall thickness is 1.968"