A fire-tube boiler made from carbon steel in which fuel gasflows within the tube while the boiler feed-water along withcondensate from the plant flows on the shell-side. Visualinspection revealed heavily localized tubercles were seen on theoutside surface of several tubes. After about 11 months ofoperation, the pipe was leaked and visual inspection found pinholes outside surface contain loose brownish rust. The rustcontained chloride and was acidic in nature. Select appropriatecorrosion prevention to apply and identify types of corrosionhappen.
