Overheating in Boilers

Overheating in boilers occurs usually in the boiler tubes.  This problem is seen when the boiler is first commissioned and a short while later.  It usually does not appear after the plant has been stabilized.

Scale formation in the tubes can be a reason for overheating.  Scale formation prevents heat transfer and can cause localized overheating.   Overheating can also occur if there are changes in the boiler operation such as a change in fuel or any change in any other significant parameter.