U.S. Bellows, Inc. has been designing and manufacturing engineered pipe expansion joints for the industry since the 1960s. Today, U.S. Bellows consists of manufacturing resources of RM Engineered Products of Ladson, SC (acquired in 1995) and Ketema – U.S. Bellows, Inc. of San Diego, California
Fabric pipe expansion joints are often used in ducts which carry hot gases at low pressures. The major design parameters are the temperatures and flow rates of the gases and the amount and abrasiveness of solids suspended in the gases. Layers of different fabrics insulation can be combined to accommodate the temperatures and pressure in the system. The fabric belt may need to be replaced periodically.