Gimbal Bellows

About Gimbal Bellows

A Gimbal Expansion Bellow is a specialized type of metallic expansion joint designed to absorb angular movement in any plane, using a system of gimbal rings and hinges. These are typically used in high-pressure and high-temperature piping systems where controlled movement and stress reduction are critical.

Key Features of Gimbal Expansion Bellows

Typical Construction

1. Metallic Bellows: Usually stainless steel or Inconel.

2. Gimbal Rings: External rings connected to the bellows via hinge arms.

3. Hinges/Pins: Allow rotation and hold the internal pressure thrust.

4. End Connections: Flanged or welded.

Advantages

• Absorbs angular deflection in two planes simultaneously.

• Prevents pressure thrust from being transmitted to adjacent equipment or piping.

• Maintains system stability and alignment.

• Can be used in combination with other expansion joints (like hinged or tied units) for complex movement systems.

Common Applications

• Power plants (steam lines)

• Chemical plants

• Petrochemical pipelines

• Offshore platforms

• Ship exhaust systems

Gimbal System Configurations

Often used in sets of two or three units in a piping leg to absorb movements without imposing forces on fixed points:

• Two Gimbals + One Hinge = Universal movement control.

• Three Gimbals = Complex 3D piping movement systems.