Definition and Uses

To start with there are three main types of piping expansion joints metal, rubber, and fabric. A expansion joint is installed in a pipe systems for a couple of reasons. Firstly  expansion joints can absorb vibrations and shock. Secondly expansion joints can also be used to relieve anchor stress, reduce noise, and compensate for misalignment. Additionally, certain expansion joints are also designed for thermal expansion in very hot applications. Next expansion joints are necessary in systems that convey high temperature substances such as steam or exhaust gases, or to absorb movement and vibration. A typical pipe expansion joint is made of metal, plastic, fabric, or an elastomer (rubber). Depending on your application, you will determine if you need a metallic expansion joint, rubber expansion joint, and a fabric expansion joint.

Expansion joints are also designed for other criteria, such as noise absorption, anti vibration, earthquake movement, and building settlement. Expansion joints are also known as “compensators”, as they compensate for the thermal movement. Expansion joints or compensators can also be called metallic expansion joints, or non metallic expansion joints. Additionally Contact Us for a quote or for more information.

Components

To begin with, pipe expansion joints consist of different components, bellows, liners, cover, end fittings, and limit rods. Formerly people often confuse an expansion joint with a bellow. They think the names can be used the as one in the same, this is not true. Furthermore a expansion joint consist off all the components. A bellow expansion joint is just one of the components of the pipe expansion joint. The bellow is the body of the expansion joint. Bellows can have Convolutions. Bellows can be made out of different materials. They are smallest flexible unit on the pipe expansion joint.

In addition to bellows is liners, liners are used to protect the inside of the piping expansion joint from erosion. When high flow of air, fluids, steam flows across the inside of a bellow, it can cause it to not work. In fact liners can prevent this problem. Also liners can reduce turbulence. Further outside covers should be used to protect the bellow from being damaged. In addition to, they can insulate the bellow. Also piping expansion joints can use flanges or butt-weld ends. Next it limit rods, they may be used in an expansion joint design to limit the axial compression or expansion. Furthermore they allow the piping expansion joint to move over a range according to where the nut stops are placed along the rods. Limit rods are used to prevent bellows over-extension while restraining the full pressure thrust of the system.