Description
Rectangular expansion joints absorb thermal movement, vibration, and minor misalignment in rectangular ducting systems — commonly used where round pipe expansion joints won’t fit the duct geometry.
Fabricated from formed metal bellows welded into a rectangular frame, they’re built to match your exact duct cross-section rather than off a standard size chart.
Custom-fabricated to your duct dimensions, in stainless steel or high-temperature alloy depending on the flue gas or air-handling conditions involved.
Key benefits
- Custom-fabricated to your exact duct dimensions
- Absorbs thermal growth and vibration in flue gas and HVAC ducting
- Reduces stress on duct supports and connected fans/dampers
Typical applications: Flue gas ducting in cement and power plants, HVAC air handling ducts, exhaust ducting in process industries.
Rectangular vs Square Expansion Joints
Rectangular and square expansion joints are selected according to the shape and dimensions of the connected ducting or equipment. Rectangular expansion joints are designed for rectangular duct configurations, while square expansion joints are suited to square duct or equipment connections. The selection also depends on temperature, pressure, movement, media, and installation requirements.
| Feature | Rectangular Expansion Joint | Square Expansion Joint |
|---|---|---|
| Shape | Rectangular | Square |
| Typical application | Rectangular ducting and equipment connections | Square ducting and equipment connections |
| Movement | Thermal, vibration and structural movement | Thermal, vibration and structural movement |
| Selection | Based on dimensions and operating conditions | Based on dimensions and operating conditions |
| Customization | Application-specific dimensions available | Application-specific dimensions available |
Looking for a square configuration? Explore our Square Expansion Joints for applications requiring a square duct or equipment connection.
