The report is result of a failure analysis and metallurgical analysis of a cargo tank (commonly known as a Nurse Tank). The Nurse Tank failed in service from a cracked head. The purpose of this project was to determine the crack initiation site (CIS) and the cause of the tank failure.

Key Words: corrosion, crack initiation site, CIS, stress, wall stress, hydrostatic, chemical analysis, metallurgical evaluation, hydraulic fluid, hydrostatically tested, initial point of fracture

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