Rubber Expansion Joints

Thermal growth, equipment movement, vibration or pressure pulsation may generate movement
in a piping system. When this movement is
not absorbed by the piping system itself, an expansion joint is the perfect solution.

A Rubber Expansion Joint is flexible connector fabricated of natural or synthetic elastomers, fluoroplastics and fabrics and, if necessary, metallic reinforcements used to absorb movements in a piping system while containing pressure and a medium running through it.


  • Reduced fatigue factor

Given the inherent characteristics of natural and synthetic elastomers, they are not subject to fatigue breakdown or embrittlement and prevent any electrolytic action because of the steel-rubber interface of joints and mating flanges.

  • Extraordinary resistance to abrasion and corrosion

A wide variety of natural, synthetic and special purpose elastomers and fabrics are available to the industry. Materials are treated and combined to meet a wide range of practical pressure/temperature operating conditions, corrosive attack, abrasion and erosion. See table of materials.

  • Minimal face-to-face dimensions while absorbing large movements
    With a minimal face to face length the Rubber Expansion Joints provide superior movement capability in axial compression, axial extension, and lateral deflection, as well as in the angular and torsional direction.
  • Low Spring Rates due to inherent flexibility of rubber
    The inherent flexibility of rubber expansion joints permits almost unlimited flexing to recover from imposed movements, requiring relatively less force to move, thus preventing damage to motive equipment.
  • No gaskets required for installation

Elastomeric expansion joints are supplied with flanges of vulcanized rubber and fabric integrated with the tube, making the use of gaskets unnecessary in most of the applications. Check assembly instructions before installation.

  • Lightweight

Rubber Expansion joints are relatively light in weight, contributing to lower installation labour costs.

  • Reduced Heat Loss

Rubber expansion joints reduce heat loss, giving long maintenance-free service


  • —  Power generating stations
  • —  Oil & gas
  • —  Desalination
  • —  Cooling systems
  • —  Pumps
  • —  Chemical plants
  • —  Heating, ventilating and

air conditioning

  • —  Shipbuilding
  • —  Off-shore applications
  • —  Water treatment plants
  • —  Sewage
  • —  Sanitary piping systems
  • —  Pulp and paper plants
  • —  Piping systems for chilled or hot water
  • —  Cooling systems power generation
  • —  Phosphate plants
  • —  Potable water
  • —  Food process
  • Rubber Expansion joints are fabricated with an elastomeric tube reinforced with multiple plies of fabrics covered with synthetic rubber. The inner tube is made of natural rubber, synthetic rubber or blend of synthetic rubber. The fabrics are Nylon®, Polyester, Aramid or Kevlar®. An additional reinforcement to the fabric may be provided in the body of the expansion joint and may be solid metal rings or wire embedded in the rubber.
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