First of all lets go one by one
stage-1 material inspection stage:
if these pitting have gone overlooked during incoming inspection then
it was really serious issue and even AI also didnt noticed.!!!
Refer UG-16(2) and as you said 3mm is corrosion allowance then it is
0.50mm is acceptable.if need UT to be done to get actual thickness
sorrouding area and deviation/concession note to be raised and Aproved
by AI.
Stage-2 fabrication stage:
if these things happend due to any atompheric effect/fabrication
Refer UW-32(a),/UW-35(1) (2) for acceptance.
in all case involvement of AI is mandatory.
if go depth..then u wil have to prepare repair procedure followed by
approved WPS prior commence any any repair!!!
On May 27, 9:44 am, asad azmi <azmiasada...@gmail.com> wrote:
> Dear All,
>
> Greetings.
>
> Pittings (not more than 0.5 mm in depth) observed on the surface of a shell
> of a Vessel. pls find photos for your reference.
>
> Shell material is SA 36. thickness 8mm. service fluid - water
>
> Code of construction is ASME SEC VIII DIV1
>
> After grindings also pittings can be observed on the large surface of the
> shell.
>
> *Whether these pittings can be accepted as it is OR further grinding is
> required.*
>
> Please Suggest.
>
> Thanks and Regards
>
> Asad Azmi
>
> 2605201111622.jpg
> 568KViewDownload
>
> 2105201111425.jpg
> 666KViewDownload
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> 2105201111426.jpg
> 556KViewDownload
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> 2605201111620.jpg
> 785KViewDownload
>
> 2605201111621.jpg
> 758KViewDownload
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