U.S. Bellows, Inc. custom designed and fabricated a 315 lb. 78 x 39 multi-layer fabric expansion joint for a power company in Texas. This fabric expansion joint will be mounted inside a turbine enclosure and allows for a 15,000 cfm air flow through the enclosure. It is designed for 27 1/2 W.C. and 930°F with 0.27 axial and ± 0.12 lateral movements. The expansion joint is equipped with a stainless steel frame and a 6 thick insulated pillow which is enclosed in a stainless steel woven wire mesh.
Fabric Expansion Joints > Blog Articles
U.S. Bellows, Inc. recently designed and manufactured a 5′ – 0″ x 12′ – 0″ fabric expansion joint for a hot air ducting system in a power plant in Tulsa, OK. It is designed at 15″ W.C. and 600 °F for 3/4″ axial movement and 1/2″ lateral movement. The fabric belts are composed of three layers with the outer layer serving as a waterproof barrier.
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.
U.S. Bellows, Inc. manufactured 87, rectangular fabric expansion joints for a furnace application at a chemical plant in Texas. The joints were designed at 11″ W.C. and 750 degrees F for ½” axial and lateral movements. The fabric belts on these joints are composed of three layers. They were equipped with a telescoping liner and 2″ thick insulation pillows to reduce the heat transfer.
U.S. Bellows, Inc., the expansion joint division of Piping Technology & Products, Inc., specially designed and manufactured fabric expansion joints reaching sizes up to 32′ x 12′ for a power station in New York. The largest of the expansion joints that are to support the air ducts of the power station, was designed at 32′ x 12′, while the others measured at 10′ x 12′. The expansion joints were fabricated with high temperature fabric belts and 4″ thick insulation pillows. The designing conditions were at 30″ WC and 950°F.
12' x 30' x 12" Face to Face, High Temperature, Fabric Expansion Joint for a Power Plant in New York
U.S. Bellows, Inc., the expansion joint division of Piping Technology & Products, Inc., specially designed and fabricated a 12′ x 30′ x 12″ face to face, high temperature, fabric expansion joint. The expansion joint was fabricated with a 3-layered fabric belt, A516 Gr. 70 telescoping liners / frame and insulation pillows. It was designed at 650°F and 30″ WC for 1/2″ compression and 1/4″ lateral. This expansion joint will be installed in an exhaust system at a power plant in New York. EJMA standards, Fluid Sealing Association standards and B31.3 code were used in the design and fabrication of these joints.
The photograph above shows rectangular expansion joints being prepared for shipment to Russia. These were fabricated to replace units in a methanol plant duct system. The fabric belt is constructed of layers of material selected to handle the hot gases at low pressures. The frames can be fabricated from a variety of metals in a variety of shapes depending on the particular application.
U.S. Bellows, Inc., the expansion joint division of Piping Technology & Products, Inc., designed and fabricated two 48-inch, triple layered fabric expansion joints for a power plant in Columbia to be used in its exhaust system. The expansion joints were fabricated with three layers: outer, center and inner. The outer layers consisted of PTFE, 25% glass filled, coated fiberglass, center layers of ceramic fiberglass and the inner layers of aluminum coated fiberglass. These expansion joints were designed at a pressure of 27”of WC and a temperature of 700oF.
The photograph above shows a rectangular fabric expansion joint in the final stages of assembly. The fabric “belt” is being attached to the metal frames. These expansion joints are inserted in metal ducts which carry hot gases at low pressures. Layers of different materials are selected to make a “belt” which will function at the high temperatures required.
The photograph above shows a fabric expansion joint designed and built for installation in a duct system by Piping Technology & Products, Inc. These joints can be fabricated from a variety of metals, in a variety of shapes, depending on the particular application. They are used where ducts carry hot gases at low pressures. The fabric “belt” is a combination of layers of different materials selected to withstand the high temperatures.