Garlock offers an array of flue duct type expansion joints. Style 8400 Flue ducts are seen in round, square or rectangular specifications, belt type or U-type, without any dimension limits. Used for lightweight applications especially for precipitants, bag-houses, scrubbers, and fans in air handling systems. Rectangular / Square Face-to-face dimensions typically 6" (152 mm), 9" (229 mm) or 12" (305 mm) If any leg is smaller than 30" (762 mm), joint will be built on a metal form with column corners Consult factory for movement capabilities, other sizes also available. Round Supplied in any size, with or without any flanges.