Description

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

Construction

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

Main Advantages

  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