Wednesday, September 5, 2012

[MW:15224] ASME Sec VIII Div.1 UCS-79 clarification

Hi friends
 
A vessel is being fabricated as per ASME Sec VIII Div.1.
MOC is SA 516 Gr.70
The 2:1 ellipsoidal Dish end nominal thickness is 16mm / min thk 14mm. There is no PWHT and Impact test requirements in the vessel.
I would like to know whether this 16mm thk dishend requires stress relieving or not as per UCS-79.
Vendor has offered dish ends without SR. Is it acceptable?
Nothing is mentioned in client specs and drawing about D/E SR.
 
Regards
 
Prem Nautiyal
 
 
 

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