Heat exchanger, tube sheet and water box repair
Dissimilar tube metals set up galvanic corrosion at the tube sheet and water box, attacking the steel around each tube end and opening leak paths.
What is failing
Dissimilar tube and tube-sheet metals set up galvanic corrosion at the joint, eating the steel around each tube end and the water box wall. Leak paths open, tubes have to be plugged, and heat-transfer capacity falls off. A bundle pulled for re-tubing can hold up an entire turnaround.
How AAS does it
AAS rebuilds the tube sheet and water box and electrically isolates the joint with ceramic-filled epoxy systems such as Belzona 1391T and 1321, with no hot work near the tubes. The crew grit-blasts the face and pits, rebuilds the wasted steel, and lays down a barrier film that breaks the galvanic cell. All of it cures cold inside the turnaround window.
Typically applied with Belzona 1391T, Belzona 1321, matched to the service conditions.
The bundle goes back in service in days, not the weeks a re-tube would take. The barrier coating breaks the galvanic cell, so the same corrosion does not return on the next run.
How AAS delivers it
AAS performs Heat exchanger, tube sheet and water box repair work for Power Generation, Oil & Gas, and Marine & Offshore operations across Baton Rouge and Louisiana, cold-applied and in place wherever possible, on your turnaround schedule. Crews are factory-trained Belzona applicators, the repair system is matched to the service conditions it will see, and urgent failures are covered by 24-hour on-call response. The result is a permanent, engineered repair that returns the asset to service without the cost or downtime of full replacement.
Related applications
Have equipment that needs to stay in service?
Tell us what is failing. We respond quickly, and we offer 24-hour on-call service.