Gimbal Expansion Joints

About Gimbal Expansion Joints

Gimbal Expansion Bellows are flexible mechanical devices used in piping systems to absorb movements and vibrations caused by thermal expansion, contraction, or mechanical forces. The gimbal part of the assembly allows angular movement in any plane, while the "bellows" provide the flexibility to absorb these movements.

What is a Gimbal Expansion Bellow?

A Gimbal Expansion Joint (or Bellows) typically consists of:

• Metal bellows Corrugated, flexible part that expands or contracts.
• Gimbal hardware A double-pivot frame allowing the joint to move angularly in two perpendicular planes
• Rings or pivots These transfer pressure thrust to the anchors.

What It Does :

Absorbs angular movement in any direction

Accommodates pipe movement due to :

• Thermal expansion/contraction
• Ground settling
• Vibration
• Seismic activity

Key Benefits :

• Absorbs multi-plane angular deflection.
• No need for large guiding or anchoring systems.
• Helps isolate sensitive equipment from vibration or misalignment.
• Maintains system pressure integrity.

Typical Applications:

• Power plants
• Refineries
• Steam and hot water pipelines
• Marine piping systems
• Offshore oil platforms

Design Considerations:

• Internal pressure
• Movement requirements (angular degrees)
• Cycle life
• Materials (stainless steel, Inconel, etc.) 
• Corrosion and temperature resistance