CONTROLLED-FLEXING EXPANSION JOINTS (RESTRAINED)

This model is used in cases of high internal pressures and/or equalizing the movement among all the corrugations.

The system involves the use of reinforcement or equalizing rings located around the outside of the convolution thus preventing the bellows being forced out of shape due to the high pressures.

Equalizing and Reinforcing Rings are devices used on some expansion joints fitting snugly in the roots of the convolutions. The primary purpose of these devices is to reinforce the bellows against internal pressure and equalize the movement among all the corrugations.

Equalizing and reinforcing rings are made of carbon steel, cast iron, stainless steel or other suitable alloys.

Reinforcing rings are usually “T” shaped in cross section and equalizing rings are generally fabricated from tubing or solid round bars.

Bellows including reinforcing or equalizing rings can be incorporated to any type of Expansion Joint (Axial, Lateral, Angular, Universal, Double, Pressure Balanced, etc.)

Standard controlled flexing expansion joint specification sheets are available in the DOWNLOADS section.

Other, special, non-catalogue Expansion Joints are available in this design. Here are a few examples:

CSWD-T Double Expansion Joint with tie rods.

CSWU Universal tied Expansion Joint

CSW single Expansion Joint, large

CSW-PBI, pressure balanced in-line Expansion Joints with weld ends.

CSWD double Expansion Joint, large size.