I have a tank with a localized damage on lower shell course next to bottom – shell welding. Diameter= 40' and height= 60'. Nominal thickness 0.375" and the lower thickness on the area is 0.099". I know in API 653 there is information regarding Fitness for Service Assessment, but I believe I have to see this issue from the structural view point and to deem the shell as a column in order to look for when it can failure based on the minimum corroded thickness.
What is your experience working with similar cases, knowing internal pressure is not a concern?
Your help is highly appreciated.
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