US Bellows

Last updated
U.S. Bellows, Inc.
Founded 1997 (Acquired)
Headquarters Houston, Texas
Products Metallic Expansion Joints
Fabric Expansion Joints
Metallic Bellows
Website U.S. Bellows, Inc.
Expansion Joints Blog

US Bellows is a manufacturer of metal bellows, fabric expansion joints, and metallic expansion joints including refractory lined, hinged, gimbal, slip-type, in-line pressure balanced, and elbow pressure balanced expansion joints. It was acquired by Piping Technology and Products in 1997 from Ketema-U.S. Bellows, Inc. [1] and is now located in Houston, Texas. U.S. Bellows, Inc. provides a variety of expansion joints for piping and duct systems [2] and has been a member of the Expansion Joint Manufacturers Association, Inc. since 2002. [3] In December 2011, U.S. Bellows acquired all bellows assets of the former Lortz Manufacturing companies, doubling its manufacturing capabilities. [4] It is a privately held company [5] owned by Durga D. Agrawal. It is a subsidiary of Piping Technology and Products. [6] These companies provide pipe supports and expansion joints to international companies including Dow Chemical Company, Chevron Corporation, ExxonMobil, and Bechtel. [7]

Metal bellows are elastic vessels that can be compressed when pressure is applied to the outside of the vessel, or extended under vacuum. When the pressure or vacuum is released, the bellows will return to its original shape, provided the material has not been stressed past its yield strength.

Piping Technology and Products is a privately owned pipe support manufacturing and engineering company headquartered in Houston, Texas, United States. Its wholly owned subsidiaries are US Bellows, Sweco Fab, Fronek Anchor/Darling Enterprise, and Pipe Shields. These companies provide pipe supports, expansion joints, shock and vibration controls, and pre-insulated supports to a variety of industries including LNG, chemical, petrochemical, pulp & paper, and aerospace.

Dow Chemical Company American chemical company

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Expansion joint construction detail designed to absorb temperature-induced volume changes of construction parts

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Hinged expansion joint

A hinged expansion joint is a metallic assembly, that can rotate in a single plane, used to absorb changes resulting from piping thermal expansion or contraction.

Toroidal expansion joint

A Toroidal expansion joint is a metallic assembly that consists of a series of toroidal convolutions which are circular tubes wrapped around pipe ends or weld ends and have a gap at the inside diameter to allow for axial stroke while absorbing changes in expansion or contraction of the pipe line. Convolutions are the portion of the bellows that allow it to be flexible. The convolutions are formed around reinforcing bands so that only the concave portion of the torus allows for flexibility. Toroidal expansion joints are typically used in high pressure applications, where little movement is required, and generally used for heat exchangers. Usually, they are hydraulically formed, but others are free formed. These expansion joints are also referred to as "Omega" bellows due to their shape resembling the Greek letter, Omega.

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References

  1. Kellar, William Henry: The First Twenty Years, page 108. 1998.
  2. The Manufacturer, Piping Technology, From the Ground Up (retrieved 7 September 2010)
  3. EJMA Official Site, EJMA Membership (retrieved 9 September 2010)
  4. U.S. Bellows Acquires Lortz Manufacturing & Doubles Manufacturing Capabilities U.S. Bellows, retrieved April 2012
  5. Bloomberg Businessweek, Businessweek (retrieved 10 September 2010)
  6. International Trade Administration, Trade Advisory Committee, (retrieved 10 September 2010).
  7. Common Causes, University of Houston (retrieved 9 September 2010)