• Booth: 6939

SEIRIS, Your Worlwide Tailor Made Expansion Joint Supplier

Brands: Expansion Joints / Metallic Expansion Joint / Rubber Expansion Joints.


  • Fabric Expansion Joints
    An expansion joint is an assembly designed to safely absorb the heat-induced expansion and contraction of pipings or other applications, to absorb vibration, to hold parts together, or to allow movements.


  • Fabric expansion joints (non-metallic expansion joints):

    • Single or Multiple layers of fabrics and elastomers.
    • Tailor made according to specific shapes, sizes and operating conditions.
    • Fabric expansion joints are primarily used for gaseous fluids.
    • Provide flexibility to ductworks to face following problems: Expansion and contraction of the ducts due to temperature changes, Vibrations, Noise, Movements of components, Installation and removal of large components, Erection tolerances, Misalignments.

    In close collaboration with its clients, SEIRIS provides the most suitable fabric expansion joints solutions for any kind of application.

    Fabric expansion joints (non-metallic expansion joints):

    • Compensate large movement s in a short length
    • Absorb simultaneous movementsin more than one plane
    • Very low forces required to move the expansion joint
    • Noise and vibrations resistance
    • Corrosion resistance materials
    • Easy installation and maintenance
    • Very low cost of replacement
    • Design freedom
    • Thermal breaks

    Design Criteria:

    Ambient conditions (Temperature, Environment, Location)
    Operating conditions (Temperature, Pressure, Movements, Vibrations, Noise, Insulation)
    Composition of the medium (Temperature, Chemicals, Abrasion, Moisture)
    Type of clamping (Flue gas tightness)

    Single Layer

    Only 1 Reinforced Elastomeric Layer

    Multiple Layer

    Various plies of different materials:

    • Supporting layer: Give specific shapes for special configurations, protect the joint, keep the insulation in place
    • Insulating layer: Thermal barrier
    • Chemical barrier: Gas seal
    • Outer cover: Provide protection from external environment, complementary gas seal

    Belt Type Expansion Joints

    Expansion joints flexible element is made as a flat belt. The most effective in terms of manufacture and installation. Materials are subject to minimum stress untill moved under operation. Allow many different types of frames to suit operating conditions. Make the replacement of the flexible element much easier. Longer life expansion joints

    Flanged Type Expansion Joints (U-TYPE or U-FORM expansion joints)

    Expansion joints flexible element made with integrated flanges at right angles. Simplest method of connection. Mostly recommended for low temperatures applications

    Main Advantages:

    Watering your lawn and is the key to preserving its lushness and beauty. The experts carefully design your sprinkler system to ensure maximum coverage to your lawn. Whether you are looking for a brand new irrigation system to maintain your lawn.

    Compensate large movements (Axial, Lateral, Angular, Torsion)
    No limits in dimensions
    Low cost of raw materials
    Low cost of Installation and Maintenance
    Light and Handy (reduced load for the ducts and safe for the staff)
    Corrosion resistance


    E.S.A (European Sealing Association)
    F.S.A (Fluid Sealing Association)

    Always carried out according to our clients particular requests:
    Identification and Control of Materials
    Drawings and Documents control
    Manufacturing Process control
    Testing, Inspection and Documentation
    Final Inspection and preparation for Delivery

  • Metal Expansion Joints
    Main Advantages:
    High pressure resistant
    Low spring rates
    Low maintenance
    Temperature up to 1200°C
    Pressure up to 70 Bars
    Diameter’s dimensions from 15 to 7000

  • We manufacture various types of :

    • Circular expansion joints: axial, lateral, with hinge, balanced Pressure.
    • Rectangular expansion joints: V and U shape
    • Single convolution

    Pumped fluid: all kind of (acid or strong bases very agressiv when we go under dew point) : in order to adapt our products to those various conditions, we use following steels:

    304 -304L - 316 - 316L -321-309-310-253 MA- 904L-317L, and also all types of INCONEL and HASTELLOY

    Our metallic expansion joints are studied and manufactured and tested further to internationals standards: EJMA, ASME and AD Merkblatter.

    A wide range of tests can be arried out on customers request:
    - Radiography
    - Liquid penetration
    - Ultrasonic
    - Magnetic particles
    - Hydraulic pressure
    - Materials analysis
    - Spring rates
    - Helium leak detection

  • Rubber Expansion Joints
    Seiris’ rubber expansion joints are customized according to following constraints:
    •Temperature up to 200°C
    •Pressure up to 20 Bars
    •Diameter dimensions from 25 to 4000

  • We manufacture all types of:

    • circular expansion joints
    • Single convolution, double or triple convolutions, with tie rods, conical, balanced pressure
    • And rectangular expansion joints: Single convolution or double convolutions

    Pumped fluid: all kind of (acid or strong bases very agressiv when we go under dew point) : in order to adapt our products to those various conditions, we use following rubbers :
    Rubber, Neoprene, EPDM, silicon, Butyl, chlorobutyl, NITRILE, SBR, HYPALON AND VITON

    For flanges we use following steels: S 275JR, S355J2G3, AISI 304, 316, 316L.

    Rubber expansion joints are studied, manufactured and tested following international standards : FSA and ASTM.

    Design Criteria

    Temperature resistance
    Resistance to corrosion
    Forming capacity
    Mechanical characteristics

    Main Advantages

    Medium to high pressure resistance
    Low spring rates
    Low maintenance

    Large cycle life

    A wide range of tests can be carried out on customers request:
    Hydraulic pressure test
    Vacuum test
    Material analysis
    Spring rates
    Movement test
    Dimensional inspections

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