Re: [MW:27164] Grinding After Hydro-Test

Minute grinding allowed it should not damaged bare thickness.

Thanking You,

With Regards..
Dinesh V Somwanshi
Api 570, Cswip 3.1,Bgas 2
Authorised Certified Piping, Welding, Painting Inspector.
00919881344135

On Dec 10, 2017 7:23 PM, "Amit Vishwakarma" <amitspvishwak@gmail.com> wrote:

Dear Experts,

Please give your advice on grinding of pressure vessel after the hydro test as during final visual inspection we couldn't find any surface damage on the shell but it has been discovered after surface preparation for painting. The pattern of surface defects on the shell can be been seen and it may be because of rolling of shell plate or job roller.

The vessel details as mentioned below & to meet the requirements of Aramco.

MOC SA240 Gr316L

Thickness 18mm

Size - Dia 3mtr x 20mt Length

Hydro Test Pressure 150PSI 

PWHT- NA

Kindly suggest it can be acceptable to remove defects by grinding maintaining min thickness of plate considering plate thickness tolerance.

Regards

Amit

 

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