Repair of Tube-Tubesheet Weld Cracks in a Cracked Gas/Steam Heat Exchanger

摘要

Serious cracks were found at tube-to-tubesheet welds during the start up operation of a cracked gas/steam heat exchanger in a gas plant. The cause of the failure has been analyzed, and the exchanger is repaired. The root cause of the cracks is mainly attributed to poor workshop in the tube-tubesheet welds. Failure analysis and repair procedure were reported in the present article. Several months of operation after the repair confirmed that the repair was successful.