Metallurgical Investigation of a Modified Eye Bolt Failure Caused by Improper Weld Extension, Specification Deviation, and Crevice Corrosion

A modified eye bolt from the David Arm Manhole Storage Tank underwent thorough metallurgical study due to the consequences of the bolt's malfunction during operation. Safety issues arose when the manhole door detached during operation. The mechanical testing and chemical composition analysis of the bolts indicated they were manufactured from an ASTM A193 Grade B7 material used for high-temperature…