The Expansion Joint Manufacturers Association is an organization of metal bellows expansion joint manufacturers. It was founded in 1955 to create and maintain a set of standards for quality expansion joint design and manufacturing. [1] The EJMA standards are used worldwide as a reference for the proper selection and application of metallic bellows expansion joints. The standards are a combination of a variety of expansion joint manufacturers' knowledge and experience. [2] [3]
The EJMA organization performs extensive technical research on a variety of topics concerning the design and manufacturing of expansion joints. [4] This knowledge contributes to providing new versions of the EJMA book of standards.
The current members that are a part of the Expansion Joint Manufacturers Association include:
Kawasaki Heavy Industries Ltd. (KHI) is a Japanese public multinational corporation manufacturer of motorcycles, engines, heavy equipment, aerospace and defense equipment, rolling stock and ships, headquartered in Minato, Tokyo, Japan. It is also active in the production of industrial robots, gas turbines, pumps, boilers and other industrial products. The company is named after its founder, Shōzō Kawasaki. KHI is known as one of the three major heavy industrial manufacturers of Japan, alongside Mitsubishi Heavy Industries and IHI. Prior to the Second World War, KHI was part of the Kobe Kawasaki zaibatsu, which included Kawasaki Steel and Kawasaki Kisen. After the conflict, KHI became part of the DKB Group (keiretsu).
In mechanical engineering, an end-face mechanical seal is a type of seal used in rotating equipment, such as pumps, mixers, blowers, and compressors. When a pump operates, the liquid could leak out of the pump between the rotating shaft and the stationary pump casing. Since the shaft rotates, preventing this leakage can be difficult. Earlier pump models used mechanical packing to seal the shaft. Since World War II, mechanical seals have replaced packing in many applications.
Yamaha Corporation is a Japanese musical instrument and audio equipment manufacturer.
Doppelmayr/Garaventa Group is an international manufacturer of ropeways and people movers for ski areas, urban transport, amusement parks, and material handling systems. As of 2023, the group have produced over 15,400 installations in 96 countries. Their annual revenue in 2022/2023 was 946 million euros. The Doppelmayr/Garaventa Group was formed in 2002 when Doppelmayr of Wolfurt, Austria merged with Garaventa AG of Switzerland to form the world's largest ropeway manufacturer.
Komatsu Ltd. or Komatsu (コマツ) is a Japanese multinational corporation that manufactures construction, mining, forestry and military equipment, as well as diesel engines and industrial equipment like press machines, lasers and thermoelectric generators. Its headquarters are in Minato, Tokyo, Japan. The corporation was named after the city of Komatsu, Ishikawa Prefecture, where the company was founded in 1921. Worldwide, the Komatsu Group consists of Komatsu Ltd. and 258 other companies.
Within industry, piping is a system of pipes used to convey fluids from one location to another. The engineering discipline of piping design studies the efficient transport of fluid.
The SIG Sauer P226 is a full-sized service pistol made by SIG Sauer. This model is available in four chamberings: the 9×19mm Parabellum, .40 S&W, .357 SIG, or .22 Long Rifle. It has the same mechanism of operation as the SIG Sauer P220, but is developed to use higher capacity, double stack magazines in place of the single stack magazines of the P220.
Vossloh AG is a rail technology company based in Werdohl in the state of North Rhine-Westphalia, Germany. The SDAX-listed group has achieved sales of around €930 million in 2016 and, as of 2017, had more than 4,000 employees.
BorgWarner Inc. is an American automotive and e-mobility supplier headquartered in Auburn Hills, Michigan. As of 2022, the company maintains production facilities and sites at 92 locations in 24 countries, and generates revenues of US$15.8 billion, while employing around 52,000 people. The company is one of the 25 largest automotive suppliers in the world.
A expansion joint, or movement joint, is an assembly designed to hold parts together while safely absorbing temperature-induced expansion and contraction of building materials. They are commonly found between sections of buildings, bridges, sidewalks, railway tracks, piping systems, ships, and other structures.
Linamar Corporation (TSX:LNR) is a manufacturing company serving the mobility, access, agriculture, and MedTech industries. The company has three operating segments: Industrial, Mobility and eLIN.
Georg Fischer comprises three divisions GF Piping Systems, GF Casting Solutions, and GF Machining Solutions. Founded in 1802, the Corporation is headquartered in Switzerland and is present in 33 countries, with 140 companies, 57 of them production facilities. Its approximately 15 000 employees generated sales of CHF 4.57 billion in 2018. GF offers pipes for the safe transport of liquids and gases, lightweight casting components in vehicles, and high-precision manufacturing technologies.
ElringKlinger AG is a German automotive supplier and car spare parts manufacturer headquartered in Dettingen an der Erms, Germany. As a worldwide development partner and original equipment supplier of cylinder-head and specialty gaskets, plastic housing modules, shielding components for engine, transmission, exhaust systems and underbody, exhaust gas purification technology as well as battery and fuel cell components ElringKlinger provides its products to almost all of the world's vehicle and engine manufacturers. As at May 3, 2017, in addition to the parent company, the ElringKlinger Group included 44 fully consolidated subsidiaries.
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. and is now located in Houston, Texas. U.S. Bellows, Inc. provides a variety of expansion joints for piping and duct systems and has been a member of the Expansion Joint Manufacturers Association, Inc. since 2002. In December 2011, U.S. Bellows acquired all bellows assets of the former Lortz Manufacturing companies, doubling its manufacturing capabilities. It is a privately held company owned by Durga D. Agrawal. It is a subsidiary of Piping Technology and Products. These companies provide pipe supports and expansion joints to international companies including Dow Chemical Company, Chevron Corporation, ExxonMobil, and Bechtel.
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.
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.
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.
A metal hose is a flexible metal line element. There are two basic types of metal hose that differ in their design and application: stripwound hoses and corrugated hoses.
Metal expansion joints are compensating elements for thermal expansion and relative movement in pipelines, containers and machines. They consist of one or more metal bellows, connectors at both ends, and tie rods that depend on the application. They are differentiated according to the three basic types of movement: axial, angular and lateral expansion joints. Expansion joints have usage in various sectors, like energy production, paper industry, chemical industry, water treatment, oil and gas. Expansion joints can be used wherever thermal movements or vibration occurs in pipelines.
Primetals Technologies Limited, is an engineering and plant construction company headquartered in London, United Kingdom, with numerous locations worldwide. It serves clients in the metals industry, both the ferrous and the nonferrous metals sector. It was established as a joint venture between Siemens VAI Metals Technologies and Mitsubishi-Hitachi Metals Machinery in 2015. As of 2020, Primetals Technologies is a joint venture of Mitsubishi Heavy Industries and partners.