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Understanding API ICP653 Reading 7-Worksheet-04 Part1

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4.4 Tank Bottom Evaluation<br />

4.4.1 General<br />

All aspects of corrosion phenomena, all potential leak or failure mechanisms<br />

must be examined. Assessment period shall be less than or equal to the<br />

appropriate internal inspection interval.<br />

NOTE: Excessive foundation settlement can have a serious impact on the<br />

integrity of shell and bottoms. Refer to Appendix "B“ for tank bottom<br />

settlement techniques.<br />

Charlie Chong/ Fion Zhang

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