In order to offer our customers maximum reliability and precision with STENFLEX® steel expansion joints, we design and construct the joints using the very latest CAD processes. Our engineering team simulates form, function and installation prior to commissioning so that the expansion joints are easy to install and are fully equipped to withstand subsequent stress.
As a manufacturer of steel expansion joints, we are reviewed and approved on the basis of the inspection framework of AD data sheets (Arbeitsgemeinschaft Druckbehälter – working group for pressure vessels) regarding the pressure equipment directive and international standards. A number of standards and bodies are used as a basis of assessment, including AD 2000-B13, DIN EN 14917 and EJMA. STENFLEX® steel expansion joints possess type approvals from various classification and certifying bodies and carry the CE mark.
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Steel bellows with connection parts (flange, welding end or threaded connection).
Axial shift, and slight all-round movement of the expansion joint is possible. Axial expansion joints with two bellows are used to absorb larger movement.
Robust pipe fixed points and correct pipe routing are necessary to absorb the axial forces.
Steel bellows with laterally movable restraints and flanges or welding ends.
Lateral shift of the expansion joint is possible. The restraint absorbs axial reac-
tion force and relieves the pressure on the pipe‘s fixed points. Lateral expan-
sion joints, with two bellows and a connecting pipe are used to absorb large movement.
Only light fixed points are required to absorb lateral movement and friction force.
Steel bellows with hinge restraint and flanges or welding ends. 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).
Only light fixed points are required to absorb angular movement force and friction force.