Expansion joints
Expansion joints are used where changes in pipeline systems must be absorbed safely.
These changes may include thermal expansion and contraction, vibrations caused by rotating machinery, pressure, deformation, and misalignment arising during equipment installation.
The main structural element of an expansion joint is the bellows. The bellows consists of a series of convolutions designed to withstand the internal system pressure while being flexible enough to compensate for axial movements, lateral offsets and angular deflections.
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Expansion joints – product group overview
Our range includes the following expansion joints:
- rubber expansion joints
- metal expansion joints
- fabric expansion joints
Suppliers and product catalogues for this product group
Supplier product information
WILLBRANDT rubber expansion joints
A rubber expansion joint is a special pipeline element that protects pipe systems against possible damage caused by thermal expansion; it also reduces noise and vibration. Its applications are very wide: from cooling and heating media, through waste water and pharmaceutical and chemical solvent systems, to acidic and alkaline lines and building services.
Types supplied:
WILLBRANDT type 53-L
Applications: general industrial use, for cooling and heating water, oil and gas
Nominal diameter: DN 20–DN 300, 1”–12”
Pressure rating: PN 10
Temperature range: -10 °C…+90 °C
Connection: galvanised carbon steel flanges
Bellows materials: EPDM, NBR, CR
WILLBRANDT type 53
Applications: general industrial use, for cooling and heating water, oil and gas
Nominal diameter: DN 20–DN 300, 1”–12”
Pressure rating: PN 6, PN 10, PN 16 or ANSI 150 lbs
Temperature range: -10 °C…+90 °C
Connection: galvanised carbon steel or stainless steel flanges
Bellows materials: EPDM, NBR, CR
WILLBRANDT type 50
Applications: general industrial use, for cooling and heating water, oil, gas, waste water, fuel and various chemicals.
Nominal diameter: DN 20–DN 300, 1”–12”
Pressure rating: PN 6, PN 10, PN 16, PN 25 or ANSI 150 lbs
Temperature range: -50 °C…+150 °C
Connection: galvanised carbon steel or stainless steel flanges
Bellows materials: EPDM, NBR, CR, CSM, BR
WILLBRANDT type 40
Applications: general industrial use, for cooling and heating water, oil and gas
Nominal diameter: DN 200–DN 5000, 8”–200”
Pressure rating: PN 6, PN 10 or ANSI 150 lbs
Temperature range: -50 °C…+150 °C
Connection: galvanised carbon steel or stainless steel flanges
Bellows materials: EPDM, NBR, CR, CSM, BR
WILLBRANDT type 80
Applications: chemical industry, for various acids and alkalis
Nominal diameter: DN 25–DN 600, 1”–24”
Pressure rating: PN 6, PN 10, PN 16, PN 25 or ANSI 150 lbs
Temperature range: -20 °C…+220 °C
Connection: galvanised carbon steel or stainless steel flanges
Bellows material: PTFE
Download product catalogues
WILLBRANDT rubber expansion jointWILLBRANDT expansion joint 53 grey red yellow rubber expansion joint 107018 WILLBRANDT rubber expansion jointWILLBRANDT expansion joint 53L grey red yellow rubber expansion joint 107019 WILLBRANDT rubber expansion jointWILLBRANDT rubber expansion joint 50, all new K2020 107915
BELMAN steel expansion joints
BELMAN stainless steel expansion joints are indispensable elements of modern piping technology. Their task is to compensate for expansion caused by temperature differences in pipelines and to reduce vibration.
Size range: DN 15 – DN 12,000
(DN 6000–12000 manufactured in segments)
Material grades
All types of stainless steel and high-alloy stainless steel, including:
– Duplex, Titanium
– Incoloy, Hastelloy
– Inconel, Tantalum
Design codes
– EN 13445 ASME B31.3
– EN 13480 ASME B31.1
– EN 14917 AD2000
– ASME VIII, Div I EJMA
Design pressure: from vacuum up to 150 bar
Movement absorption
For the above movements, our expansion joints
• fixed flange
• loose flange
• butt-weld
connections are available, and custom designs can also be requested to meet customer requirements.
Piping design
BELMAN's extensive know-how combined with Rohr2 software enables customers to design pipelines and to position expansion joints optimally along pipe sections.
All this is based on comprehensive pipe system analysis, calculation and modelling. The design study prepared for the customer includes piping drawings, descriptions, expert opinions, as well as the selection, technical specification and optimal positioning of the expansion joints designed into the system.
Download product catalogues
BELMAN introduction – expansion joints, steel expansion jointsBELMAN stainless steel expansion joints BELMAN steel expansion joints – piping designBELMAN stainless steel expansion joints – finite element analysis, 3D modelling, analysis BELMAN tank farm expansion jointsBELMAN steel expansion joints, tank farm expansion joints
KLINGER Kempchen fabric expansion joints
Fabric expansion joints
Fabric expansion joints are flexible elements that can absorb axial, lateral and angular movements in pipe systems simultaneously. Suitable designs can also absorb vibrations and torsion.
The design and manufacture of fabric expansion joints is a complex process that requires detailed information about the application, the operating environment and the size of the systems or pipelines.
Fabric expansion joints can be single-layer or multi-layer, depending on application requirements.
Size range
- DN 15 – DN 8000
- operating pressure: max. 1 bar(g)
Layer structure
- varied, depending on operating conditions
Main industrial applications
- Coal, oil and gas power plants;
- Flue gas desulphurisation systems (DeSOx)
- Nitrogen oxide removal systems (DeNOx)
- Waste incineration plants
- Chemical plants;
- Refineries
- Cement and lime industry;
- metallurgical facilities
- Painting and drying systems
- Ventilation systems
- Dust extraction and filter systems
- Fire protection systems, etc.
Designs
- circular cross-section, clamp-fixed
- flanged, circular or rectangular cross-section
- conical design
- other designs to customer requirements
