A cylindrical body welded inside the Expansion Joint, one end free to allow the Bellows to move

They prevent the direct contact of flow medium with Bellows

They are used

To hold friction losses to a minimum

  • To ensure smooth flow.
  • To prevent flow induced vibration resulting from turbulence of flow.
  • To prevent the erosion of Bellows by flow medium containing solid particles, catalyst etc.
  • To facilitate packing to prevent the entry of undesired elements in the flow medium.
  • To facilitate insulation to bring down high the flow medium temperature to the required level.


Lonestar Industries has also provided turning vanes for Special Customer requirements.