Exhaust Expansion Joint

Exhaust expansion joint is a type of bellows expansion joint, which is a specific application of bellows expansion joints in exhaust systems.

High temperature and vibration are two typical working conditions for exhaust applications.

High-quality stainless steel can withstand high operating temperatures.

The convolution of the bellows is used to absorb the displacement changes caused by thermal expansion and contraction of the piping system or exhaust system.

Considering the frequent vibrations of the exhaust system, our exhaust expansion joints mostly adopt a 2 ply bellows design.

While the 2 ply bellows can withstand the working pressure of the pipeline, its stiffness is much lower than that of the single plybellows.

The 2 ply bellows is softer, which can better absorb the vibration of the exhaust system and extend the service life of the pipes and equipment.

Types Of Exhaust Expansion Joints

Exhaust expansion joints are usually compact in structure and flanged at both ends to reduce the space required for installation.

In industrial piping systems where there is no length limit, both flanged expansion joints and welded end expansion joints are commonly used.

• Flanged expansion joint
• Welded end expansion joint

Why Exhaust Expansion Joints Are Necessary

Temperature changes can cause the pipe to shrink or expand, while the ends of the pipe are anchored.

Smart people thought of using the flexibility of the expansion joint to compensate for these movements.

Moreover, the exhaust expansion joint can also effectively isolate the vibration generated by the pump or engine operation, avoiding damage to surrounding pipes or supports.

Materials Used In Exhaust Expansion Joints

A major consideration in selecting exhaust expansion joint materials is operating temperature.

The most common raw material is stainless steel 304.

In working conditions below 450 degrees, stainless steel 304 is a cost-effective choice.

If the working temperature does not exceed 550 degrees, stainless steel 321 is a better choice.

The high-temperature resistance of stainless steel 321 is better than that of stainless steel 304.

Regarding the selection of raw materials above 550 degrees, please contact our team of professional engineers.

They will give professional suggestions based on your specific application and our raw material supply.

Exhaust expansion joints are widely used in automobile engines, exhaust manifolds, turbines, ships, power plants, etc.

As a flexible connection accessory, it plays a very important role in protecting pipelines or equipment.