Fabric Expansion Joints
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.
Advantages of fabric 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
DIFFERENTS TYPE OF EXPANSION JOINTS
Belt type
T° max 350°C
+/- 800 mm H2O
Any form, Any size
Delivery : Close or Open
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)
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
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
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
U type with bolster
T° max 600°C
+/- 800 mm H2O
Any form, Any size
Delivery : Expansion joints delivered closed or with open ends
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
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