Metal Expansion Joints

Metal expansion joints are components used in piping systems or as parts of pressure vessels to absorb dimensional changes, such as those caused by thermal expansion or contraction, and to mitigate vibrations from engines, pumps, or motors.

A metal expansion joint consists primarily of flexible bellows, which accommodate movement within a piping system while maintaining pressure and allowing the flow of a medium. The bellows are made up of one or more corrugations and end tangents, with the corrugations providing flexibility due to their shape and design.

In designing bellows, it is crucial to balance flexibility with operational parameters such as pressure, temperature, and chemical resistance to the fluids passing through them.

Types by configuration:

• Single Unrestrained
• Single Tied
• Universal Unrestrained
• Universal Tied
• Hinged
• Double Hinged
• Gimbal
• Double Articulated
• Double Gimbal
• Pressure Balanced
• Flanged & Flued
• Externally Pressurized
• Jacketed
• Reinforced High Pressure
• Thick Wall Lens and MUX Series
• Rectangular
• PTFE
• Two Ply Testable
• Dog Bone