Bellows Expansion Joint Universal Untied Expansion Joint

1. United Expansion Joint

The single united expansion joint also known as single axial internal-pressure-type expansion joint,it consists of a bellows and supporting structure. It utilizes the flexible deformation of the bellows to absorb axial displacement as well as a small amount of lateral and angular displacement in the pipeline. It does not restrict pressure thrust, hence requiring adequate anchor bolts and guiding devices. The small tie rod on the expansion joint serves as rigid support or deformation adjustment during transportation and should not be used as a stressed tie rod for balancing pressure thrust. This type of structure is simple, cost-effective, so that should be considered with high priority wherever applicable in pipeline installations.

• Design Pressure: 0.1~4.0 MPa
• Design Temperature: -25~800°C
• Connection Type: Flange/Welding
• Nominal Diameter: DN100~DN5000mm [Customizable to any size]
• Standards: EJMA, ASME, GB/T 12777-2019

2. Universal Untied Expansion Joint

The universal united expansion joint is composed of two bellows and structural components connected by an intermediate pipe. It is primarily used to absorb combined axial and lateral displacement and cannot withstand pressure thrust from the bellows. This design allows for significant lateral deflection.

Universal united expansion joint do not restrict pressure thrust, thus requiring sufficient anchor and guiding apparatus.

• Design Pressure: 0.1~2.5 MPa
• Design Temperature: -25~800°C
• Connection Type: Flange/Welding
• Nominal Diameter: DN100~DN3000mm [Customizable to any size]
• Standards: EJMA, ASME, GB/T 12777-2019

Established in 2018 with a registered capital of 300 million yuan, Beijing Hownew Energy Technology Group Co., Ltd. owns three holding subsidiaries: Cangzhou Yuantuo Piping Equipment Co., Ltd., Beijing Shenfupeng Piping Equipment Development Co., Ltd., and Hownew Technology (Hong Kong) Co., Ltd. Hownew Group is a comprehensive enterprise integrating technology research and development, product manufacturing, production and sales, plus installation and maintenance. It specializes in providing professional piping and pipe fittings, as well as piping design, manufacturing, and installation and maintenance services for domestic and international boiler, power, chemical, gas, and solar thermal industries.
The company always adheres to the working attitude of "honesty and realism, professionalism and concentration, pragmatism and efficiency", and takes technical strength as the foundation, resource background as the basis for development, and customer needs as the future trend. It closely follows the characteristics of industry technology and industry development, and continuously optimizes the design. The company is dedicated to providing customers with the highest quality and most satisfactory services.

Hownew Technology (Hong Kong) Co., Ltd.: In 2019, in response to the national initiative of "One Belt and One Road" and the Group's expansion into international markets, Hownew Group established Hownew Technology (Hong Kong) Co., Ltd. in Hong Kong. This serves as the Group's platform for international business development. The company mainly offers pipes and pipe fittings (carbon steel, stainless steel, alloy steel) such as elbows, tees, bends, reducers, and crosses to industries such as power, petrochemical, chemical, petroleum, gas, solar thermal, and shipbuilding. All products adhere to American standard ASME (ANSI), European standard EN, German standard DIN, Japanese standard (JIS), and can also be customized according to specific customer needs.