duct expansion joint
1.material:rubber,steel
2.sizes:DN32mm~DN5000mm
3.BSP,ANSI,JIS standard
4.partner:FLSmidth Co.A/S
duct expansion joint,duct expansion joints, non metallic expansion joints
1:Fabric Expansion Joints
Fabric expansion joints have distinct advantages as they can accommodate relatively large
movements and even some misalignment of flanges. They are also lightweight, easy to install
and with the addition of internal insulation bolsters have good acoustic properties. Fabric
expansion joints can be supplied fully assembled and fitted to support steelwork ready for
insertion into ductwork. For retrofit applications, we can supply as factory joined or open
for on-site joining where access is limited
ZHW fabric expansion joints are in use in Power Plants, Gas Turbine installations, Offshore
installations, Cement works, the Chemical Industry and many others. ZHW fabric expansion
joints are available in virtually any size and shape, from a range of proven standard
constructions or designed specifically for your application.
The combined temperature, pressure and media are all decisive factors in the selection of
fabric expansion joints. We offer 28 standard styles, covering every medium from clean air
to highly aggressive flue gases. The materials used for the individual layers of ZHW multi-
layer expansion joints and the number of layers vary according to the type of expansion
joint and the operational conditions.
The temperature capabilities range from -50o C to +1000o C and the pressure range from -
50kPa to +50kPa. LBH fabric expansion joints are also available as units including steel
work and ready for installation.
All materials undergo intensive in-house testing before being released for production, the
properties are verified by independent testing authorities Certificates
2:Layers
For mechanical protection, the internal layer of Standard Fabric Expansion Joints is either
glass fabric or wire mesh.
Where medium temperatures are above 300°C, ZHW Fabric Expansion Joints are de-signed with
one or more layers of insulation material for thermal protection.
If the medium conveyed is aggressive, a gastight membrane serves as a chemical barrier.
The outer layer primarily functions as a protection against ambient and mechanical
influences, and as a pressure reinforcement.
Flange reinforcement for mechanical and thermal protection of the fabric expansion joint in
the flange area.
The materials used for the above mentioned layers, vary according to the individual type of
expansion joint and the operational conditions.
3:Functions
Fabric expansion joints are used for absorbing movements between joining connections in gas
conveying ducts and pipe-lines. The movements can be caused by thermal expansion of the
ducting system, wind conditions or vibrations from other system components or machines. In
addition, fabric expansion joints can serve as seals and compensate for installation
misalignments.
4:Advantages
The implementation of fabric expansion joints provides a number of advantages, which are
technically and economically important:
Extremely flexible Absorbing large movements
Absorbing different movements simultaneously
Only requiring a limited building length
Lightweight
Easy to handle, store, install, repair, replace
Not transmitting noise or vibrations
Reducing the necessary strength of fix-points and supports
Not corroding
Dimensionally stable
Cost effective
5:Applications
Fabric expansion joints are widely used for a large number of industrial applications
including:
Power Plants
Boiler Systems
Flue Gas Desulphurisation
Systems (FGD)
Nitrogen Oxide Reduction
Systems (DeNox)
Gas Turbines
Nuclear Power Plants
Incinerator Plants
Cement Industry
Filter Systems
Ventilators
Ventilation Systems
Dust Extraction Systems
Offshore Installations
Shipbuilding
Chemical Industry
Paper Industry
Limeworks
Steelworks
Industrial Furnaces
Painting-& Drying Systems
6:structure diagrams of fabric compensator
7:certificates obtained
duct expansion joint,duct expansion joints, non metallic expansion joints
