An expansion joint is a type of joint used to connect building parts. It holds the parts together while safely absorbing expansion and contraction caused by temperature changes. It also helps to absorb vibration caused by seismic activity and ground settlement. Because of this, expansion joints are essential for building stability. They can reduce the risk of collapse by supporting the weight of the building.
Bellows expansion joints
Expansion joints, or movement joints, are designed to hold parts together while they undergo movement and temperature change. These joints safely absorb the vibrations caused by temperature-induced expansion of building materials, and they also allow movement caused by earthquakes and ground settlement. When used properly, these devices can save lives and money.
The most important thing to remember when choosing expansion joints is that there are several different designs. You can choose from gimbals, hinge, and suspended piping systems. You can also choose a self-draining type if you prefer. The design of your bellows expansion joint should be based on the type of motion and the environment it will be placed in.
Rubber bellows are designed to withstand a wide range of pressure and temperature, which makes them ideal for a variety of applications. They are commonly used in the transport of liquids, gases, and solids. They can be manufactured in single or multiple arches, and can incorporate galvanised backup rings for additional strength.
A key factor in choosing expansion joint materials is the type of material that expansion joints can withstand extreme temperatures. For example, metal bellows are better suited for high-temperature environments than rubber. While both materials have their advantages, rubber bellows provide more support for specific applications.
A well-constructed expansion joint provides a leak-free connection between two layers of pavement. It also provides a flexible, self-sealing, and durable seal. As a result, it is an excellent choice for driveways, sidewalks, and single-level floor slabs.
Bellows for expansion joints are usually made of metal, plastic, fabric, or elastomer. Their shape is a series of convolutions designed to withstand internal pressure in the pipe. They can also accommodate lateral and axial deflections.
The basic unit of an expansion joint is a steel bellows. These bellows can be either single ply or multi-ply. They are usually supplied with pipe end attachments that enable butt welding. The bellows are not only strong, but also able to absorb vibrations and noise. As a result, they can help enhance fatigue rupture capacity and minimize piping noise.
Modern expansion joints are multi-ply structures, consisting of multiple, thin layers of metal that are welded together to form the bellows walls. In the case of a multi-ply structure, the bellows are made up of stainless steel outer and inner cylinders that are pressure-tight. In addition, there are multiple “walls” that are welded together in a concentric manner.