Water-wall Tube in Power Boiler
Observation : Thick-lipped rupture,may be very large
window missing or a flap hanging by one edge or a long
crack
Cause : Hydrogen damage Remarks : Hydrogen damage is an under-deposit corrosion
mechanism. Damage occurs in high heat areas (e.g., above
burners). Often associated with one or more low pH
excursions in the boiler and/or long-term contamination
(condenser tube leak). High probability that other tubes are
similarly affected. All affected tubes must be
replaced.