Metallic expansion joints

Are suitable for fluids in a liquid and gaseous state, high pressure, and temperature. Special components are manufactured and designed upon request.

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What is a metallic expansion joint?

Metallic expansion joints are used in pipes, equipment and all the other cases where is necessary to compensate thermal expansion. Since expansion joints are high technological components, they must be chosen and installed correctly, according to the design conditions.

The expansion joint can be manufactured with a single or double bellows, with or without external support based on the installation’s requirements.

 
 
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How a bellows works

The bellows is a metallic sealing and flexible component that allows axial, lateral and angular movements. In the following diagrams, it is possible to see the flexible movements of a single and double bellows.

The combination of bellows and external supports or the combinations of more expansion joints consent to solve a wide variety of problems due to the compensation of thermal expansion.

Axial expansion joints

They generally consist of a single bellows and allow to compensate the pipeline thermal expansions, in the axial direction and can partially compensate, also lateral and angular movements.

Universal expansion joints

They compensate the axial, lateral, angular movements, also simultaneously.

Hinged expansion joints

They are manufactured by a single bellows, allowing just one angular rotation in a single plane.

Double hinged expansion joints

They are manufactured by two hinged expansion joints bound together by an intermediate pipe and relatedarticulations.

Gimbal angular expansion joints

They are manufactured by a single bellows that allow the angular rotation in every plane.

Double gimbal angular expansion joints

They are manufactured by two gimbal expansion joints linked together by an intermediate pipe and related articulations.

Lateral spherical expansion joints

They allow only the lateral movement, preventing the axial one.

Dismantling joints

They are used to allow the dismantling of valves or other equipment.

Axial in-line balanced expansion joints

resist pressure thrust caused by internal pressure.

Universal balanced expansion joints

resist pressure thrust caused by internal pressure.

Flexible hoses

are manufactured by a single bellows with regulating tie rods and dismantling.

Pipe supports

are manufactured of a spring with its frame and a chain to fix the pipeline.