Specify PMI by alloy, component, examination percentage, test method and acceptance criteria. Control traceability through cutting, fabrication and field repair, and investigate every mismatch before tower closure.

Control dividing-wall leakage by defining allowable bypass, sealing every perimeter and penetration, checking differential-pressure deflection, accommodating thermal movement and verifying the completed boundary with a function-appropriate test.

Define project seismic demand, inventory all operating mass, trace lateral reactions through packing and internals to the shell, and coordinate seismic restraint with thermal expansion and installation clearance.

Treat hydrotesting as a separate internal load case. Map liquid boundaries, calculate wet weight and buoyancy, verify equalization and drainage, and inspect critical geometry before returning the tower to service.

Long pipe-arm liquid distributors require controlled thermal movement. A defined fixed point establishes position, while sliding supports accommodate expansion without losing weight support or alignment. Excessive restraint can bend branches, crack welds and overload vessel clips. Thermal design must also preserve outlet elevation, nozzle direction and wall clearance. The distributor should remain hydraulically aligned at operating temperature—not only mechanically level when installed cold.