The condition of the combustion chamber directly affects safety, heat transfer, and flame stability.
Refractory cracks
Minor surface cracks may be normal, but extensive spalling or deep wear requires evaluation.
Hot spots
Localized overheating may indicate poor flame distribution or damage to the lining.
Flame impingement
The flame must not strike the chamber walls or piping uncontrollably.
Post-repair
The burner is re-tested across the full load range to confirm that the flame shape remains correct.
