March 9, 2020

High Pressure In-Line Rubber Pressure Balanced Expansion Joints for Refinery in South America

A pressure balanced expansion joint accommodates axial and lateral movements and counteracts the bellows pressure thrust. An additional bellows is incorporated into the unit and is subject to the line pressure to generate a force equal and opposite to that on the main bellows. Tying these bellows together neutralizes the pressure load on the unit.

The only loads on the equipment are the sum of the forces required to move the line bellows and balancing bellows of the expansion joint.

This type of Joint can be fitted between intermediate fixed points so main anchoring of the pipe or adjacent equipment is not required.

This time we have successfully designed, manufactured, tested, packed and shipped four 56” In-Line Rubber Pressure Balanced Expansion Joints for Refinery in South America.

Main design parameters and features of the expansion joints supplied are:

Design Codes

  • Pressure Equipment Directive PED 97/23 / EC for the specified operating conditions.
  • FSA (Fluid Sealing Association) Non-Metallic Expansion Joints Division.
  • ASTM F1123 - 87 (2010) Standard Specification for Non-Metallic Expansion Joints.

Design and/or Operation Conditions

  • Design Pressure = 12.60 bar
  • Design Temperature = 50 ° C
  • Test pressure: 18.90 bar
  • Medium: Sea Water