Based on the image ,the stain might caused by the corrosive fluid used in the vessel and the leakage near the heat affected zone.you may find out the nature of fluid by microbiological test then make a decision.
Regards,
S.ANANDH
QA/QC INSPECTOR
NSH CORPORATION
SADARA CHLORINE&BRINE PROJECT.
SAUDI ARABIA.
On Wednesday, 20 November 2013 4:22 AM, kalidindi raju <eswar.iitb@gmail.com> wrote:
Dear Friends,
On a recent inspection of a Stainless Steel Vessel, there were some corrosive stains observed on near the weld.
Please refer to the pictures attached.
The stains indicate a leakage/flow behavior of the containment.
However, when observed visually there was no leakage of any liquid.
The vessel was in service since 2008.
Material of construction is Stainless Steel SS 316.
What could be the probable cause of this behavior?
Please share your views.
Regards,
Eswar Raju.
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