Types of Rubber Expansion Joints Used in Pipe Connectors

A rubber expansion joint is a type of pipe connector that can absorb movement. They are available as single or double spheres. You can also find spool-type expansion joints with multiple arches. They provide a reasonable offset for pipe movements caused by equipment settling. When used properly, a rubber expansion joint will not cause structural damage to the pipe.


If you are looking for a rubber expansion joint, you’ve probably heard of the Metraflex brand. This system combines the advantages of a traditional expansion joint with the repackaging capabilities of a packed expansion joint. The packed expansion design of the Metraflex is designed to prevent excessive movement. This means that you don’t have to worry about the expansion joint overextending or under-extending during service.

Metraflex offers a number of different types of joints, including the MetraPak, which can absorb large amounts of axial movement and reduce the need for anchors. This is a particularly great option if you’re dealing with high-pressure applications. In addition, the MetraPak can handle higher temperatures, which is beneficial in many pipelines and process systems. Metraflex engineers can also produce customized versions of the MetraPak to meet the exact specifications of your piping system.

Style 301

A Unisource Style 301 rubber expansion joint is made of high-quality EPDM rubber with nylon tire cord reinforcing. It has higher temperature resistance and better physical properties than Neoprene. Its galvanized steel floating flanges engage the rubber beaded end of the expansion joint and are designed for ease of installation. This type of expansion joint is especially well suited for isolating small diameter piping from vibrations of mechanical equipment.

It is available in different sizes, from one-half inch to 36 inches. Single and double-sphere types are available. They can be adapted for use in a variety of applications. Depending on the application, the rubber sphere can be filled with https://evrproducts.com/products/rubber-duckbill-check-valves/wastop-backflow-valve/ rubber foam, if needed.

Series 1500

The PROCO Style 231 single arch rubber expansion joint is a durable product that can handle the most demanding piping system configurations. This product is designed to reduce noise, vibration and misalignment, while offering the best flexibility in a variety of applications. It is available in an open or filled arch configuration.

Its unique design allows the ducting to serve as a flow lining, while the joint’s frame replaces the stiffener flange. The complete duct and expansion joint ships fully assembled from the factory.


The Ultra-Sphere rubber expansion joint is one of the most common types of piping joints used today. Its design offers high pressure and temperature capabilities, as well as good movement characteristics. The Ultrasphere also provides effective noise control and reduces vibration and pulsation shocks. It is available in a variety of materials, including EPDM, Nitrile, and Neoprene.

These expansion joints are available in single or double versions and are available in a variety of standard sizes. They can be made from 1-1/2″ to sixteen inches in diameter. Larger sizes up to 20 inches can be made on special order. Arch-type and spool-type expansion joints are available as well. Ultra-Sphere connectors are designed to perform double duty, as they can also serve as vibration-elimination pump connectors.