Sunday, September 25, 2011

[MW:12522] surface imperfections observed on Shell Surface of a Pressure Vessel

Dear All,
 
Greetings.
 
A vessel is being fabricated as per ASME SEC VIII DIV 1.
 
Surface imperfections( NOT Pittings)  were observed on the surface of the shell of the Vessel. please refer attached photos.
 
The shell material is SA 516 GR 70, 17 mm Thk.
 
Plaese inform me what will be the effect of these imperfections on shell in terms of Corrosion.
 
Do these imperfections required Grinding OR can be left as it is.
 
Thanks & Regards
 
Asad Azmi
 

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