Expansion Joints

Rectangular Expansion Bellows

Rectangular Expansion Joints are manufactured to individual sizes and functional requirements.Self developed fabricating methods to be used as Duct Expansion Joints.

Rectangular Expansion Joints are provided with either weld able duct ends or with fabricated angle flanges. These Duct Expansion Joints are normally used in large size ducting with relatively low internal pressure.

Heavy Wall Expansion Bellows

Heavy Wall Expansion Joints are the simplest type of expansion joints. They are compact requiring virtually no additional space beyond the length of bellows and weld ends or flanges for installation. They have further advantage of not imposing a change in the direction of flow. Where small thermal movements are involved and where proper anchoring and guiding is possible single axial bellows provide the most economical solution.

External Pressure Expansion Bellows

Compensating larger amount of thermal expansions by axial expansion joints are only possible by increasing the number of corrugations of the bellow, but this increases the possibility of torsion. Applying inner sleeves may reduce the torsion but they also reduce the movement ability of the expansion joints. Ayvaz’s Externally pressurized expansion joints provide the most suitable solution for such cases.

Engine Exhaust Bellows

It is placed on the engine before the turbo charger where high temperatures, vibrations and pressure impulses occur. Operating  Temperature up to 800 °C (1472 °F) and/or pressure up to 12 Bar (174 PSIG). The bellows, the flexible part of the expansion joint, is a multi-layer construction with thin layers of heat resistant stainless steel.

Elbow Pressure Balanced Expansion Bellows

This type of pipe expansion joint is really a combination of several types. Its purpose is to retain and balance the pressure thrust so that main anchoring of the pipe or adjacent equipment is not required, and forces and movements on attachment flanges of delicate equipment, such as turbines, are kept to acceptably low levels. The deflections to be accepted are handled by the proper type of pipe expansion joint, which normally, is a tied universal type to accept lateral movements. However, the pressure balanced elbow is usually required because axial deflections are also present. In order to accept these movements, a bellows is added beyond the elbow with the same cross-sectional area as the ones in the universal section.

In-Line Pressure Balanced Expansion Bellows

When axial deflections exist, and anchoring is impractical for structural or economic reasons, such as high in the air or short straight pipe runs between two large vessels, the in-line pressure balanced pipe expansion joint is a powerful solution to a difficult design problem. The principle of this type of unit is essentially the same as the pressure balanced elbow type, in that the axial pressure thrust is reacted by the pressure acting on a cross-sectional area equal to the area of the working or primary bellows.

Universal Expansion Bellows

The movements occured in two directions can only be absorbed by using Lateral Epansion Joints. Universal tied expansion joints are made up of two bellows connected each other by an intermediate pipe and a system of tie rods able to withstand the thrust resulted of the internal pressure.

Gimbal Expansion Bellows

Gimbal type expansion joints are designed to permit angular rotation in any plane by the use of two pairs of hinges affixed to a common floating gimbal ring.


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