Boiler chimneys are commonly lined with?

Boiler chimneys are commonly lined with fire brick because this material can withstand the extremely high temperatures produced by the combustion process in a boiler. Fire bricks are specifically designed to retain heat and provide thermal insulation, making them ideal for use in environments where heat resistance is critical. They also have a lower thermal conductivity compared to standard bricks, which helps in minimizing heat loss and improving the overall efficiency of the boiler system. Additionally, fire bricks are resistant to the corrosive byproducts of combustion, which contributes to the longevity and durability of the chimney lining. This choice supports safety and operational effectiveness in boiler systems.