Rubber Expansion Joints

A rubber expansion joint is a flexible pipe connector. The joint absorbs movement in the piping system and helps in reducing noise and vibration. The joints can be used in various applications, such as for industrial ducting systems, steam turbine exhaust lines, and aeration systems. They are available in different sizes and pressures. The joints are made from synthetic and natural elastomers. The expansion joint has a built-in pressure resistance through a special external retaining ring. Moreover, the joints are designed to handle a variety of media, including water, raw sewage, chemicals, and other liquids.

Rubber joints are commonly used in the power industry, nuclear plants, and fossil fuel plant. They are also known to be beneficial in controlling thermal contraction on condensate lines. In addition, they can make pipes more quiet and stable.

They can be customized according to the customer’s specifications. There are several styles and designs of rubber expansion joints to choose from, including spool, torsional, and angular. They are available in a range of materials, such as synthetic Nitrile rubber, Viton, Hypalon, and other fluoroelastomers. They are also designed to meet specific requirements for corrosive or abrasive conditions. The design of the joints can be optimized by applying the latest technology in the field.

The design of the expansion joint is essential to ensure that rubber expansion joints the seal is durable and continuous. It has a steel-rubber interface that prevents electrolytic action. The internal pressure of the spheres distributes forces evenly over a large area. The spheres are reinforced with a bead or wire to form a seal. The bead is made of solid metal rings or embedded in the rubber. Usually, the thickness of the wall is between 0.15mm and 2mm. However, the thickness can be varied to match the specific demands of the installation.

In addition to the spherical structure, the spool type expansion joints are also available in arch construction. They are manufactured with a leak-proof lining tube that extends through the bore and outside the flanges. The spool type expansion joint can be configured with lateral offset features or reduced connections. The lining tube can be made from Fluoroplastic, which provides exceptional chemical resistance. It is also available in stainless steel or zinc-plated carbon steel.

The design of a rubber expansion joint can be optimized by using FEA. This tool can be used to analyze product designs, which can help in determining the most efficient path for production. It can be used to reduce the use of reinforcement materials by up to 50 percent, which can also help in achieving higher quality products. It can also be utilized in the development of software for further optimization of machine paths.

The expansion joint is also equipped with a bolt that can be removed without any tools. This feature makes it easy to change the sizing or location of the joint. A common failure site in the joint is loose bolts, which can easily lead to leakage.