Location: Superheater

Appearance Observation Locations Mechanism
Metal thinning on fireside Metal thinning on fireside »
External wastage beneath adherent slag deposit External wastage beneath adherent slag deposit »
Smooth surface Smooth surface »
ID pitting with corrosion tubercles ID pitting with corrosion tubercles »
Porosity in weld Porosity in weld »
Multiple tight fine cracks Multiple tight fine cracks » »
Fish-mouth rupture Fish-mouth rupture »
Irregular cracking Irregular cracking »
Short longitudinal cracks with numerous parallel cracks Short longitudinal cracks with numerous parallel cracks » »
Multitude of cracks parallel to tube Multitude of cracks parallel to tube » »
Longitudinal crack at bend Longitudinal crack at bend »
Complete failure at weld Complete failure at weld » »
Brittle fracture in heat affected zone of a weld Brittle fracture in heat affected zone of a weld » »
Longitudinal cracks adjacent to weld Longitudinal cracks adjacent to weld » »
Thick-lipped rupture and adjacent longitudinal fissuring Thick-lipped rupture and adjacent longitudinal fissuring » »
Complete weld separation Complete weld separation » »
Appearance Observation Location Mechanism