Expansion joints are used to absorb thermal expansion. They can also be used to absorb contraction in cryogenic lines and to reduce vibration in piping systems. ... They are necessary in systems that convey high-temperature substances such as steam or exhaust gases, or to absorb movement and vibration.

Is expansion joint necessary?

Concrete expansion joints allow concrete slabs to expand and shift without causing damage to your home's foundation or surrounding structures. An expansion joint is exactly what it sounds like. It's a joint that allows expansion. ... So, this has always been the case, and this is why expansion joints are necessary.

Where are expansion joints required?

Use expansion joints between slabs and columns, walls, footings and wherever curbs or sidewalks meet other concrete structures. Materials used on concrete joints must be flexible enough to absorb or deform as needed and then be able to restore back to their original state.