According to API 653, when should an owner/operator consider using an API 579 Level 2 or 3 fitness-for-service assessment for corroded tank components?
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A
When corrosion is detected during any inspection
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B
When measured thickness falls below the minimum required by the original construction standard but continued service is desired
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C
Only when preparing for tank demolition
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D
When the tank is less than 5 years old