For 50 years now, STENFLEX® rubber expansion joints have been the well-established and preferred flexible pipe connection elements used in industrial equipment manufacture, machine construction, apparatus manufacture and pipeline construction. The connections impress with their compensating and damping material properties as well as their capacity to discharge energy in the interior of the pipeline to protect adjacent components.
Our expertise in the design and construction of STENFLEX® rubber expansion joints is reflected in their long service life and high operational reliability. This explains why almost all of Europe's nuclear plants, for example, are equipped with STENFLEX® expansion joints.
Rubber bellows with connection parts (flange or thread)
Axial, lateral, angular and simultaneous movement absorption is possible. Universal expansion joints with two bellows and a connecting pipe are used to absorb large movement.
To absorb axial force a pipe’s fixed points must be robust. Pipe routing must be correct.
Rubber bellows with flanges and laterally movable restraints.
Lateral shift of the expansion joints is possible. The restraint absorbs axial reaction force and relieves the pressure on the pipe’s fixed points. In double joints the type of restraint allows for movement on one plane; in ball joints it allows for all-around movement. Lateral expansion joints with two bellows and a connecting pipe are used to absorb large movement.
Only light fixed points are required to absorb force from lateral movement and friction force.
Lateral expansion joints with tie rod restraints are not designed for axial adjusting movements. However, if axial adjusting movements are initiated, the tie rod restraints cannot compensate the compressive force and will be transferred to the fixed points of the piping instead.
Rubber bellows with flanges and hinge restraint. The rotating axis of the hinge restraint is in the middle of the bellows.
Angular movement of the expansion joint is possible. The angular joints regulate a defined angular movement, absorb axial reaction force and relieve the pressure on the pipe’s fixed points. We differentiate between angular expansion joints with a hinge (bellows’ angular movement guided on one plane) and angular expansion joints with a cardan hinge restraint (bellows movement guided on two planes). Angular expansion joints with connecting pipe are used to compensate large movements.
Only light fixed points are required to absorb angular movement force and friction force