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Would you recommend expansion joints become filled with Kao when the expansion joint is utilized in high-temp applications (e.g. reactor overhead lines)?

Yes, we would recommend that the expansion joint is filled with Kao, but it would require a special design or over-sized bellows.

With regards to materials, how do you certify the materials?

We obtain the MTR’s and additionally we perform positive material identification tests in house and if a customer requires additional the additional ...Continue Reading

Why should I use a double offset expansion joint?

A double offset expansion joint can be used to absorb large amounts of lateral motion with a minimum amount of deflection forces

Why do bellows have corrugations?

Bellows have corrugations (convolutions) in order to be able to absorb the thermal movement of the piping.

Which forming method is better of more quality?

Where is the insulation pillow located within the expansion joint?

There are a variety of places for the insulation pillow to be placed within the expansion joint. It can be inside ...Continue Reading

Where do I install expansion joints in a piping system?

The location of expansion joints in a piping system depends on the design conditions and the piping system configuration. All cases must ...Continue Reading

When are center supports required on expansion joints?

Use a center spool support to support the weight of the spool between the bellows and to stabilize the center spool during ...Continue Reading

What type of material is normally used in the accumulation barrier?

What type of EJ do I use so that I don’t need to design for the pressure thrust force?

Pressure balance type. The major advantage of a pressure balanced joint is its ability to absorb axial movement without imposing ...Continue Reading

What’s the highest cycle # you can handle?

Fatigue life of any unit has to be calculated. The number of cycles varies according to the design conditions of the ...Continue Reading

What’s the difference between a single and multi-layer bellows?

If you use a two-ply bellows, each ply can be designed for the full temperature and pressure conditions so that if ...Continue Reading

What other name is the toroidal pipe expansion joint known as?

This expansion joint is also known as an Omega bellows pipe expansion joint for it resembles the Greek letter Omega.

What limits the U-shaped design application?

Design condition of bellow prescribes physical dimension and shape of convolution. It also depends on a combination of size, temperature ...Continue Reading

What is the smallest inner diameter you can fabricate?

What is the service life of expansion bellows before it needs to be serviced in steam application?

There is not a particular time period of service life, but it depends on the environmental condition of the expansion joints. ...Continue Reading

What is the purpose of the hinged expansion joint on a duct expansion loop?

Hinged expansion joints are used in conjunction with piping loops in order to absorb large amounts of thermal expansion.

What is the leak “rate” acceptance criterion for the bolt to fabric connection?

What is the function of an expansion joint in a compressor?

An expansion joint is typically installed in compressor inlet or outlet piping to reduce the forces and moments on the compressor nozzles.

What is the flow direction of an expansion joint?

Flow direction of an expansion joint refers to the direction by which the material within the pipe is moving.

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