cold forming of shell plates

[fazel2]

Is it acceptable to form a 100mm thckness shell plate of a HP drum by cold forming(rolling) process?
Design code is ASME SecI

 

[stanweld]

Yes. There are manufacturers which possess plate rolls capable cold forming 100 mm plate. Also more than likely the Drum will be subject to PWHT in a furnace by the manufacturer. This will stress relieve the cold forming stresses in the shell as well as the Code mandated stress relief of the welds.

 

[fazel2]

In cold forming ,some grain deformation will happen. Does this require normalizing process or just stress relieving is enough?