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Single Expansion Joint

• Single Expansion Joints has one bellow.
• Extension lateral and angular movement can be accommodated.
• These expansion joints do not restrain the internal pressure thrust.  
• Where small thermal movements are involved and proper anchoring and guiding is feasible, a single expansion joint is the most economical installation.

Single Tied Expansion Joint

• Single Tied Expansion Joints also have one bellows, except the overall length is restrained by tie rods designed to contain pressure thrust.
• A single tied EJ is usually designed for lateral offset so that the tie rods can remain fully engaged and loaded with the pressure thrust force. A two tie rod design can accept angular deflection in a single plane.