Refractory repair & replacement

Boiler refractory issues are among the leading causes of unexpected boiler shutdowns—and they can often go undetected until serious damage occurs. At Global Boiler Services, our refractory specialists are ready to inspect, repair, and replace refractory linings to keep your boiler or incinerator operating safely and efficiently. 

What is boiler refractory? 

The refractory is a heat-resistant lining that protects critical internal parts of the boiler and helps retain heat, reducing thermal loss during operation. It is a vital element in maintaining energy efficiency and protecting the boiler structure from high-temperature damage. 

Causes of refractory damage 

While refractory materials are designed for durability, they are considered consumable components that degrade over time due to: 

• High operating temperatures 

• Pressure fluctuations 

• Slag and residue buildup 

• Chemical exposure from boiler fuel 
  

One of the most common failure modes is spalling—when refractory materials expand or contract at different rates due to thermal changes, causing cracking or crumbling. Additionally, using incorrect or substandard refractory materials can lead to premature failure under heat and pressure.