Single Hinged Expansion Joints

The single hinged expansion joints are made of one single bellows element fitted with welding ends or flanges plus a system of articulated supports which allow for angular movement in one plane only. The hinge mechanism is designed to accept full pressure thrust.

The single hinged metal expansion units do not allow axial movement however, some types of hinge systems can be provided with holes for the hinge pin that are slotted to allow limited axial displacement.

These “slotted hinge” types of metal expansion joints can not resist the pressure thrust forces and therefore proper anchorage must be provided.


Hinged Metal Expansion Joints - flanged

Hinged Metal Expansion Joints - flanged

Hinges are mounted to limit the expansion joint to absorb movements in only one plane in the hinged metal expansion joints. Due to the hinges the expansion joint is not able to absorb axial movement. The hinge is likewise designed to protect the bellow from torsion. These movement limiters reduce the loads from the pressure thrust force and the temperature of the pipeline. The pressure thrust force from the media is in this way absorbed in the pipeline. The hinges are designe..

Hinged Metal Expansion Joints - welding ends

Hinged Metal Expansion Joints - welding ends

The hinged expansion joints are made of one single bellows element fitted with welding ends plus a system of articulated supports which allow for angular movement in one plane only. The hinge mechanism is designed to accept full pressure thrust.These units do not allow axial movement however, some types of hinge systems can be provided with holes for the hinge pin that are slotted to allow limited axial displacement. These “slotted hinge” types can not resist the pressure thr..

Showing 1 to 2 of 2 (1 Pages)