N-Type Custom Built Heat Exchanger

Visual inspection of sacrificial anodes for depletion; check for galvanic corrosion on phenolic coating on tubes; verify cathodic protection system effectiveness (ICAF system status if equipped)

Remove header/water box for visual inspection of tube bundle exterior; check for biological growth and sediment accumulation; measure pressure drop across cooler as fouling indicator; plan chemical or mechanical cleaning as needed

Inspect double O-rings on both sides for cracks, compression set, or extrusion; verify water box gasket condition; test for leakage between circuits (shell-side and tube-side isolation); check for discoloration or weeping at seal points

Inspect tube interior for scale, rust, or oil sludge buildup; verify shell-side for sediment and scale accumulation; clean tubes chemically or mechanically per maintenance schedule; verify no internal blockages in water passages

Check for dents, cracks, or corrosion perforation in tube walls using visual inspection and leak testing; verify baffle spacing and tube support condition; confirm U-bend tube integrity in V-type heaters; inspect for loose or missing components