Rectangular Expansion joint

About Rectangular Expansion joint

A rectangular expansion bellow is a type of mechanical device used to absorb movement, vibration, or thermal expansion in piping, ducting, or other systems, particularly when space or layout constraints require a rectangular cross-section instead of the more common circular type.

Key Features:

• Shape: Rectangular cross-section, suitable for rectangular ducts or structures.

• Material: Typically made of stainless steel, other metals, or flexible materials depending on the application (e.g., fabric for HVAC systems).

• Movement Absorption: Capable of handling axial, lateral, and angular movements.

• Application Areas:

  • HVAC ducting systems

  • Power plants

  • Exhaust systems

  • Industrial gas handling systems

  • Structures requiring thermal expansion accommodation

Types of Rectangular Bellows:

1. Metallic Bellows: Made from stainless steel or other metals; used for high-pressure, high-temperature, or corrosive environments.

Design Considerations:

• Expansion Requirements: Amount of thermal or mechanical movement expected.

• Pressure and Temperature Ratings: Based on the system requirements.

• Corner Design: Rectangular bellows can have mitered, rounded, or camera (bellows box) corners.

• Reinforcements: Tie rods, liners, and covers may be included depending on the systems load and media.