Rubber Expansion Joints
SEIRIS
Different types of Rubber Expansion Joints
Single convolution
Complete with tie rod
Double Convoluted
Rectangular
Triple Convoluted
Pressure Balanced
Concentric
Angled
Arched
Eccentric
Description
Seiris manufactures custom-made Rubber Expansion Joints designed to meet a wide range of industrial requirements. Our joints are designed to withstand:
Temperature: up to 200 °C
Pressure: up to 20 bar
Diameter: 25 to 4000 mm
Applications:
Suitable for pumped fluids, including highly aggressive acids and strong bases, particularly in conditions below the dew point.
Rubbers: natural rubber, neoprene, EPDM, silicone, butyl, chlorobutyl, nitrile, SBR, Hypalon and Viton, selected according to chemical and thermal resistance requirements.
Flanges: S275JR, S355J2G3, AISI 304, 316 and 316L steels.
All Rubber Expansion Joints are designed, manufactured and tested in accordance with FSA and ASTM international standards, ensuring their reliability, safety and long service life in demanding industrial environments.
Temperature: up to 200 °C
Pressure: up to 20 bar
Diameter: 25 to 4000 mm
Applications:
Suitable for pumped fluids, including highly aggressive acids and strong bases, particularly in conditions below the dew point.
Rubbers: natural rubber, neoprene, EPDM, silicone, butyl, chlorobutyl, nitrile, SBR, Hypalon and Viton, selected according to chemical and thermal resistance requirements.
Flanges: S275JR, S355J2G3, AISI 304, 316 and 316L steels.
All Rubber Expansion Joints are designed, manufactured and tested in accordance with FSA and ASTM international standards, ensuring their reliability, safety and long service life in demanding industrial environments.
Fabrication of Rubber Expansion Joints:
At Seiris, rubber expansion joints are custom-designed to provide flexibility, durability and chemical resistance for industrial piping systems. They are designed to withstand varying temperature, pressure and fluid conditions while ensuring optimal performance.
Design criteria:
Thermal resistance – Withstands operating temperatures and fluctuations.
Corrosion resistance – Resists aggressive chemicals and fluids.
Formability – Maintains structural integrity in required shapes and convolutions.
Mechanical properties – Strength and elasticity suitable for the application.
Flexibility – Absorption of axial, lateral and angular movements.
Materials and types:
Rubbers: natural rubber, neoprene, EPDM, silicone, butyl, chlorobutyl, nitrile, SBR, Hypalon, Viton.
Flanges: S275JR, S355J2G3, AISI 304, 316, 316L.
Design criteria:
Thermal resistance – Withstands operating temperatures and fluctuations.
Corrosion resistance – Resists aggressive chemicals and fluids.
Formability – Maintains structural integrity in required shapes and convolutions.
Mechanical properties – Strength and elasticity suitable for the application.
Flexibility – Absorption of axial, lateral and angular movements.
Materials and types:
Rubbers: natural rubber, neoprene, EPDM, silicone, butyl, chlorobutyl, nitrile, SBR, Hypalon, Viton.
Flanges: S275JR, S355J2G3, AISI 304, 316, 316L.
Complete solutions for Rubber Expansion Joints
At Seiris, we manufacture single-layer or multi-layer Rubber Expansion Joints with one, two or three convolutions, offering excellent flexibility, pressure resistance and chemical protection for industrial piping systems.
Single-layer expansion joints:
A single reinforced elastomeric layer with optional convolutions, ideal for standard applications requiring a compact design, high strength and the ability to absorb small axial, lateral or angular movements.
Multi-layer compensators:
Designed for demanding conditions, these compensators combine multiple layers and convolutions to withstand higher pressures, greater movements and aggressive fluids:
Support layer – Adds shape, stability and reinforcement.
Pressure layer – Improves resistance to internal pressure.
Chemical barrier – Protects against acids, bases and corrosive environments.
Outer coating – Protects against UV, moisture and external wear.
These robust designs ensure long life and reliable performance under thermal expansion, vibration and chemical exposure.
Single-layer expansion joints:
A single reinforced elastomeric layer with optional convolutions, ideal for standard applications requiring a compact design, high strength and the ability to absorb small axial, lateral or angular movements.
Multi-layer compensators:
Designed for demanding conditions, these compensators combine multiple layers and convolutions to withstand higher pressures, greater movements and aggressive fluids:
Support layer – Adds shape, stability and reinforcement.
Pressure layer – Improves resistance to internal pressure.
Chemical barrier – Protects against acids, bases and corrosive environments.
Outer coating – Protects against UV, moisture and external wear.
These robust designs ensure long life and reliable performance under thermal expansion, vibration and chemical exposure.
Key Benefits:
Excellent flexibility – Absorbs axial, lateral and angular movements.
Vibration and noise reduction – Minimises mechanical stress and operating noise.
Corrosion and chemical resistance – Resistant to aggressive acids, bases and corrosive fluids.
Ability to withstand pressure and vacuum – Operate reliably under high pressure or vacuum conditions.
Thermal expansion compensation – Withstands temperature fluctuations without damage.
Easy installation and maintenance – Lightweight, compact and simple to replace.
Long service life – Durable materials ensure extended operational reliability.
Standards
Seiris manufactures Rubber Expansion Joints in accordance with strict international standards to ensure safety, quality and performance:
● FSA (Fluid Sealing Association) – Guidelines for design, materials and performance testing.
● ASTM International – Standards for rubber properties, chemical resistance and mechanical testing.
● ISO 9001 – Quality management throughout the production process.
● PED 2014/68/EU – Compliance with European pressure equipment (where applicable).
● DIN/EN standards – Requirements for the design, manufacture and installation of rubber seals .
● FSA (Fluid Sealing Association) – Guidelines for design, materials and performance testing.
● ASTM International – Standards for rubber properties, chemical resistance and mechanical testing.
● ISO 9001 – Quality management throughout the production process.
● PED 2014/68/EU – Compliance with European pressure equipment (where applicable).
● DIN/EN standards – Requirements for the design, manufacture and installation of rubber seals .
Quality control:
● Material testing – Verification of rubber and flange properties.
● Dimensional inspection – Verification of dimensional accuracy and shape.
● Pressure and leak testing – Verification of leak tightness and pressure resistance.
● Non-destructive testing (NDT) – Detection of hidden defects.
● Performance testing – Validation of flexibility and movement capacity.
● Dimensional inspection – Verification of dimensional accuracy and shape.
● Pressure and leak testing – Verification of leak tightness and pressure resistance.
● Non-destructive testing (NDT) – Detection of hidden defects.
● Performance testing – Validation of flexibility and movement capacity.
Services
● Emergency supply – Rapid delivery for urgent requirements.
● Custom manufacturing – Rubber seals designed to meet specific pressure, temperature and chemical conditions.
● On-site inspection and assessment – Expert evaluation of existing piping systems and seals.
● Assembly supervision – Advice to ensure correct installation and optimal performance.
● Turnkey installation – Complete installation handled by our experienced teams for reliable operation.
● Custom manufacturing – Rubber seals designed to meet specific pressure, temperature and chemical conditions.
● On-site inspection and assessment – Expert evaluation of existing piping systems and seals.
● Assembly supervision – Advice to ensure correct installation and optimal performance.
● Turnkey installation – Complete installation handled by our experienced teams for reliable operation.