A number of power plant chimneys have suffered from severe fire damage over the past 20 years. The risk of catastrophic fires is even more relevant today as large amounts of combustible construction materials are used in Flue Gas Desulfurization (FGD) systems.
Power plant chimneys are often close to the FGD plant, and in case of an FGD fire the chimney can be exposed to very high temperatures. With an average of about 60 structural fires a year in power plants reported by the National Fire Incident Reporting System (NFIRS) in the US, the risk of fire is real.
PennguardTM linings protect chimneys in case of fire
Consulting firm Exponent studied the performance of different chimney flue designs when exposed to fire. Tests show that PennguardTM linings protect steel chimney flues in case of fire. At temperatures of over 500˚C / 900˚F, alloy-clad flues are at risk of collapse, and FRP flues are likely to catch fire, even with fire retardants.
In 1996, an FGD fire at one US power station caused 1,000˚C / 1,800˚F temperatures inside a steel chimney. The PennguardTM lining successfully protected the chimney from collapse.