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Tank Dent Aceptance Criteria

Tank Dent Aceptance Criteria

(OP)
Good Evening sirs,
what are the acceptance criteria for a tank vent?
During the construction, perhaps for a incorrect procedure welding of a stair support, we have suffered this distorsion.

thanks

regards

RE: Tank Dent Aceptance Criteria

Atmospheric or pressurized tank? Shape of tank? Size of tank versus size of distortion?

Maybe check Roark's to see if there are any calculations for plate stress with distortions. If there isn't, you may be able to figure out residual stress from the dent and then use that to figure out total plate stress while the tank is at normal/max operating conditions.

RE: Tank Dent Aceptance Criteria

Is it an API-650 tank? If so, have you checked the API-650 shell tolerances in that area?

RE: Tank Dent Aceptance Criteria

TANKO,
What is distorsion or do you mean distortion?

RE: Tank Dent Aceptance Criteria

(OP)
API650, atmospheric and cylindrical shape 390m3..it's a small tank. The dent is about 300x300,on the 2┬░shell course

RE: Tank Dent Aceptance Criteria

Also depends if this is a new tank ( use API 650 ) or an existing tank ( use API 653 )

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