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What is end thrust?

It is the force generated due to the pressure inside the expansion joint. Pressure thrust is calculated by multiplying the area of ...Continue Reading

What is squirm pressure?

How do you define a hydro-test pressure based on design pressure?

How does US Bellows define a hydro-test pressure based on design pressure? When engineers design fluid networks, a common question ...Continue Reading

How do you calculate pressure thrust load?

Pressure thrust load is calculated by finding the area of the mean diameter of the bellows and multiplying it by the ...Continue Reading

What are the failures of expansion joints?

Expansion joints failure is caused by corrosion, erosion, cyclic fatigue or thermal creep at elevated temperatures.

Why do rubber expansion bellows fail?

Rubber bellows can crack if they are over-pressurized or placed in a harsh environment.

Why do expansion joints fail?

Failures can occur for many reasons, but experience has shown that certain causes of failure fall into fairly distinct categories. Shipping ...Continue Reading

What is the failure mode of bellows?

The failure mode of bellows could be any of a variety of things including erosion, corrosion, cyclic fatigue or thermal creep at ...Continue Reading

What is the maximum operating temperature range that expansion joints can be exposed to?

Regarding the operating temperature, we design metal pipe expansion joints up to 2000° F with refractory and 1000° F to 1500° ...Continue Reading

Are toroidals commonly used as heat exchangers?

Toroidals can be used but not often. Most exchanges use normal thin-wall expansion joints or thick-wall expansion joints fabricated from flanged ...Continue Reading

Can a double gimble expansion joint be used both vertically and horizontally without any extra piping support?

The weight of the units is self-supporting but the additional weight of the piping, elbows etc. in the field will ...Continue Reading

Can bellows be used to absorb vibration, for example, caused by a pump?

For an inline pressure balanced expansion joint, overall speaking, is it equivalent to a simple expansion joint without thrust force?

How many expansion joints should be used in a pipe?

The number of expansion joints used in a pipe depends on the length of the pipe, the pressure, the temperature, and the ...Continue Reading

What is an expansion joint used for?

An expansion joint is used to absorb dimensional changes, such as those caused by thermal expansion or contraction of a pipeline, duct, ...Continue Reading

Which type of joint is used for fuel oil & fuel gas applications?

The expansion joint used for fuel oil and fuel gas applications depends on the movement and design conditions of the particular application ...Continue Reading

What’s the typical spring rate for a 20″ pressure balanced expansion joint?

The spring rate is equal to the spring rate of both flow bellows plus the spring rate of the balancing bellows.

When are expansion joints needed for pipelines?

Expansion joints are needed to absorb thermal movement when piping flexibility will not solve the problem.

Where are expansion joints required in power plants?

Expansion joints are required anywhere throughout the plant where thermal expansion must be absorbed. One example where expansion joints may be ...Continue Reading

When should you use a liner in an expansion joint?

It is recommended that all expansion joints include liners in order to protect the bellows from the internal flow environment.