Expansion Joints and their Functions

Metal Bellows Expansion joint is a very essential elements to the piping systems. They are used as an alternative of expansion loops. Expansion joints main function is to absorb terminal movements and thermal expansions. They come in varying shapes and sizes with many choices of material.

Expansion joints are crucial in piping systems nowadays. A good piping system understands the functions of expansion joints and where to utilize them for maximum efficiency. They absorb shock, vibrations, reduce noise and take the heat of all the directional movements. Expansion loops can’t fulfill all these functions which is why Metal Expansion joints are used.

Elastomeric joints are unable to cater in extreme weather and pressure induced environments which is why need for expansion joints arises. They can withstand temperatures between 450 Fahrenheit to +2000 Fahrenheit. It can hold the pressure of 3000 psi.

Functional Capabilities of Metal expansion joints

Metal Bellows Expansion Joint while allowing the directional thermal movements, tone down the noise. Their ability to produce a discontinuation among piping system helps in noise and vibration reduction. Rotating parts of an equipment like centrifugal pumps produce unbalanced forces which causes noise. Expansion joints distort those forces and absorbs the energies.

Type 1: Absorption of directional movement and vibration

This type of expansion joint is designed for maximum thermal absorption as they are a major outcome in any piping system. Thermal factors may depend upon temperature, material of joints and size of pipes. They have exceptional resistance to shock which is caused by seismic events or pressure surges in piping systems. These movements are strong enough to emit forces which tend to limit stress of pipes.

Type 2: Spool shaped Expansion Joint
Spool shaped elastomeric joints are made up of tube carcass and cover. This is basically a leak proof lining. Its function is to protect the carcass to form a contact with the fluid. The material of tube should be able to fight temperature, chemical abrasions and acid fumes.

Conclusion:

The main role of metal expansion joints is the reduction of noise, stress and shock. They prevent the harm from external factors which could threaten the solemnity of a system. Misalignment of joints is the main problem that causes issues to a piping system. Expansion joints compensates for all the misalignments and increase the life of the piping system. All you need to know is the different types of expansion joints so that you may understand their application in different areas.