Fabric Expansion Joints





An expansion joint is a flexible element that compensates movements between pipelines, among other things in case of vibrations in lateral or axial directions, temperature differences, or wall ducts. They are used in pipeline construction as well as in plant and apparatus construction. Depending on the application, expansion joints are made of different materials. Neoprene, EPDM, Hypalon, silicone, Viton, or PTFE are used among other materials.



Designs

For our customers, we manufacture each expansion joint individually.
In the process, we take into account the respective operation-specific parameters.
Substantially, three designs can be distinguished:

Tube expansion joint I

IMPLEMENTATION

Mounting directly on the pipeline




Dimensions

For round or oval cross sections


Media temperature

Depending on the material, suitable for up to 350°C

Pressure

+/- 0.25 bar. Higher pressures on request

Expansion absorption

For axial, lateral, and angular movements

Tube expansion joint II

IMPLEMENTATION

Mounting on pulled out mounting flanges




Dimensions

For all cross sections


Media temperature

Depending on the material and respective design measures, suitable for up to 1000°C

Pressure

+/- 0.25 bar. Higher pressures on request

Expansion absorption

For axial, lateral, and angular movements

Flange expansion joint

IMPLEMENTATION

With self-sealing flanges and single or multi-part backing flanges




Dimensions

For round, rectangular, and oval cross sections


Media temperature

Depending on the material, suitable for up to 650°C

Pressure

+/- 0.50 bar. Higher pressures on request

Expansion absorption

For axial, lateral, and angular movements

Groups of material

By using various materials and respective material combinations, it is possible to work out an optimal problem solution both from a technical and economic point of view. This is substantially determined by the



mechanical

chemical and

thermal


influences.
The design itself is always defined by the following groups of material and the corresponding tasks:



Insulating material

As insulating material, fabrics from ceramic, glass, or silicate are used. It prevents the actual sealing foil from being damaged by mechanical or thermal influences. The decisive factors are the quality and strength of the insulating fabric.

Sealing foil

For the primary sealing element, the sealing foil, foils made of high alloy steel, elastomers, or PTFE are used. The sealing foil is mainly enclosed by two layers of fabric.

Backing fabric

For the backing fabric, fabrics from silicate, polyester, glass or aramid are utilized. The backing fabric is on the outside and is usually coated. It ensures dimensional stability and compressive strength of the expansion joint.

Coating

For example, neoprene, silicone, CSM, PTFE, Viton, EPDM, or Hypalon are used to coat the backing fabric. The various elastomers protect the backing fabric and support the shaping. For simpler components, the coating acts as the primary sealing element.

Do you have any questions? We are gladly at your disposal.

Hummeltal

GfG-Kompensatoren mbH

Gesellschaft für Gewebekompensatoren mbH
Zum Steingraben 9
95503 Hummeltal
Upper Franconia / Bavaria
+49 (0)9201 – 17 08+49 (0)9201 – 9 54 45

www.gfgkompensatoren.com

info@gfgkompensatoren.com

Office hours: Mon-Tue 8 a.m.-5 p.m., Fri 8 a.m.-1 p.m.

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