After a major flooding event, inspect packing movement, ceramic breakage, structured-packing alignment, bed restraints, distributors, supports, and mist eliminators before full-load restart. The flooding cause should be corrected and differential pressure monitored during controlled return to service.

Severe or persistent vibration can loosen connections, shift packing, disturb distributors, and open separator gaps. Retrofit should address the vibration source where possible and improve restraint, fastener retention, alignment, and inspection of dynamically sensitive tower internals.

Freeze damage can distort distributor piping, crack packing, overload supports, damage mist eliminators, and reveal poor drainage. Retrofit should repair the damaged components while improving drainability and winterization so liquid does not remain trapped during future cold shutdowns.

After an overtemperature excursion, inspect packing, distributors, supports, bed limiters, seals, linings, and fasteners using the actual temperature history. Plastic deformation, ceramic thermal shock, metal distortion, and lining damage should all be considered before returning the tower to service.

A mist eliminator located too close to a gas outlet can experience highly nonuniform face velocity and local re-entrainment. Retrofit should consider separator elevation, disengagement distance, outlet geometry, wall sealing, drainage, and the possibility that the outlet nozzle itself limits capacity.