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Rubber Expansion Joints

Non-metallic expansion joints have been used in place of the traditional all-metal expansion joints to solve problems caused by the thermal and mechanical stresses generated in complex systems. Even though the power generation industry is a main user of rubber expansion joints, the product was found acceptable in many other industries.

Three reasons to use rubber expansion joints:

  1. To prevent stresses due to expansion and contraction

  2. To insulate against the transfer of noise

  3. To compensate for misalignment


  • Large movement potential: the non-metallic expansion joint offers multi-plane movements in a shorter face-to-face dimension.

  • Corrosion resistance: the ability of various rubbers and plastics to stand up to corrosive chemicals can extend the life of an expansion joint.

  • Sound and vibration elimination: the outstanding vibration and sound attenuation characteristics of elastomers help prevent premature system degradation.

  • Ability to stand up to high temperatures: with the use of special materials, non-metallic expansion joints can withstand over 1000°F operating temperatures.



  • Lower systems design costs

  • Low material costs

  • No gaskets required

  • Lower replacement costs

Rubber expansion joints also effectively confront these problems:

  • Vibration

  • Noise

  • Shock

  • Corrosion

  • Electrolysis

  • Induced Forces

Expansion joints may operate in pipelines or equipment carrying fluids and/or gases at elevated temperatures and pressures. Precaution should be taken to insure proper installation and regular inspection. Care is required to protect personnel in the event of leakage or splash.

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