Seiris SAS

Seiris SAS

- Fabric Expansion Joints (Non-Metallic Expansion Joints)

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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.

  • 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 / Multiple Layer Expansion Joints

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 / Flanged Type

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

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Belt type

  • T° max 350°C
  • +/- 800 mm H2O
  • Any form, Any size
  • Delivery : Close or Open

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Belt type curved

  • T° max 800°C
  • +/- 800 mm H2O
  • Application : Gas turbine exhaust, Bypass and HRSG applications
  • Large mouvments up to 150mm
  • Any form, Any size
  • Delivery : Open ( Mounting could be done by SEIRIS Team or just a SEIRIS Supervisor)

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Belt type with bolster

  • T° max 800°C ( up to 1200°C with refractory lining)
  • +/- 800 mm H2O
  • Any form, Any size
  • Delivery : Expansion joints delivered closed or with open ends

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U type with inner sleeve

  • T° max 450°C
  • +/- 800 mm H2O
  • Any form, Any size
  • Delivery : Expansion joints delivered closed or with open ends

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U type without inner sleeve

  • T° max 350°C
  • +/- 800 mm H2O
  • Any form, Any size. For aggressive media SEIRIS use PTFE, EPDM or VITON specially for FDG application
  • Delivery : Expansion joints delivered closed or with open ends

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U type with bolster

  • T° max 600°C
  • +/- 800 mm H2O
  • Any form, Any size
  • Delivery : Expansion joints delivered closed or with open ends

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Conical belt type with clamps

  • T° max 350°C
  • +/- 800 mm H2O
  • Any form, Any size
  • Delivery : Expansion joints delivered closed or with open ends

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Conical U type without inner sleeve

  • T° max 350°C
  • +/- 800 mm H2O
  • Any form, Any size
  • Delivery : Expansion joints delivered closed or with open ends

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