Lens bellows expansion joints


Lens bellows expansion joints can be the right solution to piping, ducting and vessel thermal growth problems compared to conventional thin walled metal bellows.
Thick-wall expansion joints are used primarily in heat exchangers and large diameter piping systems where thin-wall expansion joints would not be sufficient.


Dents and gouges create stress risers in thin ply bellows which result in fatigue cracks over time. Lens bellows have the advantage of holding up to mechanical damage better than thin wall bellows.

  • Sizes from DN200-DN8000
  • Thicker wall of lens bellows holds up better to corrosion attacks
  • Weld repair can be performed by plant maintenance staff on thick walled bellows.
  • Drain couplings can be added to the bottom of the convolution to prevent condensate build up
  • Common use of carbon steel material
  • Limitless convolution height
  • Thick walled, high convolution is durable and lasts for a long time.


  • Iron and Steel Industry
  • Mining Industry
  • Chemical Industry
  • Power Stations
  • Cement Factories