Fabric Expansion Joints — The Expansion Joints Blog

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Comparison Chart for Selecting Fabric Expansion Joints

August 1st, 2011 Comments off

Trying to decide which type of fabric expansion joint to use in your application? Our new comparison chart lists the materials, temperature ranges, advantages, pressure, chemical resistance and applications.

View the Fabric Expansion Joint Materials Comparison Chart

The following are examples of expansion joints fabricated from a variety of materials.

Expansion Joints Fabricated with Neoprene Material:

Expansion Joints Fabricated with Neoprene Material

 

Expansion Joints Fabricated with Reinforced Silicone Material:

Expansion Joints Fabricated with Reinforced Silicone Material

Expansion Joints Fabricated with PTFE Impregnated Fiberglass Material:

Expansion Joints Fabricated with PTFE Impregnated Fiberglass Material

 

Expansion Joints Fabricated with Silica Fabric Cloth Material:

Expansion Joints Fabricated with Silica Fabric Cloth Material

78 Inch Fabric Expansion Joint and Duct Work Assembly with a 90° Elbow for a Sulphuric Acid Plant

April 11th, 2011 Comments off

78" Fabric Expansion Joint and Duct Work Assembly with 90° Elbow for a Sulphuric Acid Plant

U.S. Bellows designed and fabricated a 78″ fabric expansion joint and duct work assembly with a 90° elbow for a sulphuric acid plant in Louisiana. A stress anaylsis was performed to determine thermal movements and spring supports, loads and travel.

78" Fabric Expansion Joint and Duct Work Assembly with 90° Elbow for a Sulphuric Acid Plant

The ducts are fabricated from carbon steel and are 30′ long. The expansion joint is designed for 750°F at 5 PSIG with 2.5″ lateral deflection (cold preset) and 2″ axial compression. Cradle supports and a “big ton” spring support were also fabricated for this project.

Fabric Expansion Joint Designed for a Power Generator Unit

March 28th, 2011 Comments off

Fabric Expansion Joint Designed for a Power Generator Unit

This fabric expansion joint is 13′ long by 5′ wide, and 21″ deep. The frame and liner are fabricated from 304 stainless steel, and the belt is a fiber glass reinforced PTFE material. Prior to shipping for installation in a power generator unit, all the welds were dye penetrant examined.

Fabric Expansion Joints for Duct Systems

October 19th, 2010 Comments off

Fabric expansion joints are often used in ducts which carry hot gases at very low pressures. Layers of different fabrics and insulation can be combined to accommodate the temperatures and pressure in the system.

Round Fabric Expansion Joints

Fabric Expansion Joints for Low Temperature Duct Systems

Fabric expansion joint applications include, air and flue gas duct systems, flue gas desulfurization systems, gas turbines and diesel engine exhaust, incinerators, etc.

Rectangular Fabric Expansion Joints

Rectangular Fabric Expansion Joints for High Temperature Duct Systems

Rectangular Fabric Expansion Joints for High Temperature Duct Systems

Materials for fabric expansion joints include: silica cloth, mineral wool insulation pillows, PTFE coated fiberglass, ceramic fiberglass and aluminum coated fiberglass.

Furnace Sealing Bag

Furnace Sealing Bag for High Temperature ApplicationsA special type of high temperature fabric expansion joint developed by U.S. Bellows, Inc. is a furnace sealing bag. The objective of the bag is to seal the air inlet conduits penetrations into a furnace and thus prevent heat loss.

View the Technical Bulletin on Furance Bags

10' Square Fabric Expansion Joints

April 27th, 2010 Comments off
10' Square Fabric Expansion Joints

10' Square Fabric Expansion Joints

The fabric expansion joints are fabricated from a high temperature and corrosion resistant composite belt with A588A Corten steel duct, flanges, and covers. They are 10′ square and 24″ face to face. All welds were 100% dye-penetrant, and a soap and air test was performed prior to shipping. The expansion joints will be used for a flue gas application in an oil refinery in Texas.

Air Duct Fabric Expansion Joint

December 1st, 2009 Comments off
Air Duct Fabric Expansion Joint

Air Duct Fabric Expansion Joint

This air duct fabric expansion joint has a unique design that allows for lateral movement of 2″ in any direction. It will be used in an air duct system as a transition piece between the air blower and the air duct. This expansion joint is fabricated with Alpha 827 fabric cloth and A36 carbon steel flanges and has a design temperature of 300ºF at .1 PSIG. The top flange measures 68-5/8″ L x 57-5/8″ W, and the bottom flange measures 53-5/8″ L x 64-5/8″ W.

Rectangular Fabric Expansion Joints

April 17th, 2008 Comments off
Rectangular Fabric Expansion Joints

Rectangular Fabric Expansion Joints

Rectangular Fabric Expansion Joints

Rectangular Fabric Expansion Joints

The fabric expansion joints’ frame and liner are fabricated from 304 stainless steel. The three layer fabric belt consists of an inner layer of silica cloth, a middle layer of mineral wool and an outer layer of PTFE/coated fiber glass. Dye-penetrant examination was performed on all welds of the expansion joint’s frame prior to shipping.

44" Expansion Joints for a Petrochemical Plant

April 9th, 2008 Comments off
44" Expansion Joints for a Petrochemical Plant

44" Expansion Joints for a Petrochemical Plant

U.S. Bellows, Inc., a division of Piping Technology & Products, Inc., designed and fabricated 44″ fabric expansion joints for a petrochemical plant in Malaysia. The expansion joints measure 44″ ID x 40″ face to face and are fabricated from stainless steel pipe and flanges and a three layer fabric belt protected by an insulation pillow. The design conditions were 3 PSIG at 845°F. The expansion joints are designed for a lateral movement of 1/2″ and an angular rotation of 1.5°. Stainless steel covers were included to protect the fabric expansion element from possible outside damage.

128" x 229" Rectangular Fabric Expansion Joints

July 11th, 2007 Comments off
128" x 229" Rectangular Fabric Expansion Joints

128" x 229" Rectangular Fabric Expansion Joints

128" x 229" Rectangular Fabric Expansion Joints

Rectangular Fabric Expansion Joints

The fabric expansion joints shown above are fabricated with a three layer fabric belt. The three layers consist of an inner layer of silica cloth, a middle layer of mineral wool and an outer layer of PTFE/coated fiber glass. The frame includes an insulation blanket of mineral wool and stainless steel wire mesh. The frame and liner are fabricated from 3/8″ thick 304 stainless steel and each expansion joint’s frame and liner welds were dye-penetrant tested before shipping.

Design:
- Pressure: 1 PSIG
- Temperature: 1010°F
Design Movements:
- 2″ Axial Displacement
- 3/4″ Lateral Displacement

36" x 10" Face-to-Face Fabric Expansion Joints

April 18th, 2007 Comments off
36" x 10" Face to Face Fabric Expansion Joints

36" x 10" Face to Face Fabric Expansion Joints

36" x 10" Face to Face Fabric Expansion Joints

36" x 10" Face to Face Fabric Expansion Joints

36" x 10" Face to Face Fabric Expansion Joints

36" x 10" Face to Face Fabric Expansion Joints

This 36″ diameter fabric expansion joint with a three layer fabric belt includes 150 lb. flat face flanges with carbon steel backing bars and liner. The fabric belt consists of silical fabric, fiberglass fabric and mineral wool insulation. The photos below show the process of stitching the fabric belt on the first layer.

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