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Eemua 159 say do not weld the plate in the critical zone. I wonder outside of annular plate. Thank you

Thank you for your reply. I'll check it

They say loss of thickness is about 30% only outside. We think patching that place is impossible but there is no evidence.

Thank you for your reply, You mean It is possible when it comes to avoid HAZ of the shell? The purpose of patch plate is cover the corroded annular plate.

Thank you for your reply,

I recently received an inquiry from a company asking if it is possible to attach an additional plate to the external protrusion of an outdoor tank annular plate. Just as the critical zone inside the tank is important,I think that part is also important, so I'm going to answer that it's not,but...