Rubber expansion joints are used widely in most energy and industrial plants
today. Made from natural or synthetic elastomers, rubber expansion joints
are vital components used as flexible connectors in which special fabrics
are embedded to provide physical reinforcement. They are used in a variety
of applications. Rubber expansion joints are available in standard sizes or
customized to the customer's individual needs from a variety of high quality
synthetic rubber materials.
What are Rubber Expansion Joints?
Rubber Expansion Joints are
defined as connectors between vessels or used in all systems transporting
fluids, slurries or gases operating under pressure at widely different
temperatures. These rubber expansion joints are installed in air and gas
duct systems in all power plants, gas turbine systems, diesel engine
installations, petrochemical and chemical plants, pump systems, cement
works, steel works, incinerators, on- and offshore systems, ships and cruise
Uses of Rubber Expansion Joints
In a relatively short space,
rubber expansion joints provide the ultimate solution to:
- Compensate for pipe misalignment
- Absorb compression and extension
- Accommodate pressure loads
- Reduce noise
- Isolate vibration
- Neutralize axial, lateral, angular stresses
- Prolong life of motive equipment
- Prevent damage to pipe-work or ducting system
- Relieve stress of on equipment flanges
- Adjust for seismic movement
Applications of rubber expansion joints
Rubber expansion joints are used in a variety of heating, ventilation, and
air conditioning systems, which includes commercial and industrial
buildings, hotels, apartments, schools, shopping plazas and aboard ships to
relieve stress in ductwork. Rubber expansion joints are installed to isolate
equipment like pumps, compressors and chillers from the piping system. A
variety of configurations of joints are available accommodating different
shapes, service and connection requirements.
Protection of a process piping system is an important use for rubber
expansion joints. The joints reduce noise and vibration caused by forces in
pumps. They also centrifuges by behaving as a shock absorber in systems
handling abrasive slurries, corrosive chemicals, or very reactive liquids or
gases. Thermal movement in a piping system can also be avoided by using
rubber joints. The excellent chemical resistance of rubber and synthetic
elastomers make these joints ideal for process piping systems.
Power Plant Applications
Nuclear and fossil fuel plants use Rubber expansion joints so as to reduce
thermal expansion and contraction on condenser lines, condensate lines,
steam turbine exhaust lines, aeration systems and cooling water lines.
Reliability, large size capability, long life, and the ease with which they
accommodate themselves to movements make these expansion joints ideal for
power plant applications.
Industrial Ducting Systems
Rubber expansion joints have been installed in demanding industrial ducting
systems where there are problems like heavy vibration, dry or wet corrosive
materials, flutter etc.
Eliminating the destructiveness of electrolysis and at the same time
insulating against the transmission of sound, rubber expansion joints allow
the necessary motion and flexibility in a 'moving' ship's piping system. The
compactness, resilience and low stress features of rubber make these joints
ideally suited for shipboard piping systems. The rubber joints are popularly
used in areas like auxiliary condenser, air intake on diesel engines,
overboard discharge line between condenser and hull, ventilation lines,
flush and sanitary systems, fire and bilge pumps, to name a few.
Pollution and Wastewater Treatment
Water treatment plants, waster water treatment plants, Sewage treatment
plants, and air scrubber systems all employ the use of rubber expansion
joints. Due to their resistance to abrasion and corrosion as well as their
flexibility feature, rubber expansion joints are ideal to be used in raw and
secondary sewage lines, sludge pumps, centrifugal air blowers, scrub stacks.