Flue Gas Expansion Joints: Types, Uses & Applications Explained Flue Gas Expansion Joints play a vital role in industrial ducting systems by absorbing thermal movement, vibration, and pressure fluctuations caused by hot flue gases. These joints protect ductwork from stress, leaks, and structural damage while ensuring efficient, safe operation in power plants, boilers, and exhaust systems. https://afsjoints.com/what-are-duct-expansion-joints-types-and-uses/