Environmental exposure
Heat, oxidation, deposits, old surface layers and restricted access during shutdown inspection.
Operating conditions
The review focuses on the actual exposure of High-temperature process equipment and metal surfaces: duty cycle, temperature changes, moisture or process media, dust or particle movement, vibration, access and shutdown constraints. Where a verified numerical value is unavailable, the condition is kept qualitative.
Problem analysis
Visible cracking, peeling or deposits required diagnosis before a maintenance system could be selected. Inspection should distinguish active defects from stable areas, confirm substrate soundness and cleanliness, and identify edges, welds, joints, low points and restricted-access zones before the repair scope is fixed.
Problem to address
Heat accelerates oxidation while deposits can create local chemistry and conceal substrate loss. Old surface layers and shutdown cooling may change the visible condition, so inspection separates deposits, corrosion and previous repair evidence.