U.S. Bellows, Inc. designed and manufactured a 21’ x 14′ fabric expansion joint for a power plant in Puerto Rico. This expansion joint was designed at 1 PSIG and 1200 °F for an air duct at the power plant. The frame is all A-240 and 304 stainless steel construction. This expansion joint is equipped with 6” thick insulation pillows. Telescoping liners hold the insulation pillows between the liner and the fabric belt to reduce heat transfer and prevent ash accumulation.