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Universal Expansion Joint

Universal Expansion Joint
Universal Expansion Joint
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Product Code : 29076
Brand Name : Global Transmission
Product Specifications
  • Material
  • Metal
Product Description

Universal Expansion Joint

The Universal Pipe Expansion Joint Consists Of Two Bellows Separated By A Pipe Section Or Spool. The Primary Purpose Of This Arrangement Is To Have A Unit Which Will Accept Large Amounts Of Lateral Deflection. The Amount Of Lateral Deflection They Can Accept Is A Function Of The Amount Of Angulation Each Bellows Can Absorb And The Distance Between The Bellows. For A Given Bellows Element, The Amount Of Lateral Deflection Capability Can Be Increased Or Decreased By Simply Changing The Length Of The Center Spool.

Since Deflections Are Usually The Result Of Piping Thermal Expansion, And Universal Expansion Joints Are Usually Long, The Thermal Expansion Of The Entire Unit'S Length Is Accepted As Compression By The Two Bellows Elements. In This Way, The Overall Length Of The Unit Does Not Change When The Piping Is Heated.


  • Absorbs Large Amounts Of Lateral Deflection
  • Unit Length Does Not Change With Heat
  • Eliminates Pressure Thrust Load
  • Tie Rods Not Required


The Necessary Steps For Installing All Pipe Expansion Joints Shall Be Pre-Planned. The Installers Shall Be Made Aware Of These Steps As Well As The Installation Instructions Furnished By The Manufacturer. The Most Critical Phases Of The Pipe Expansion Joint Installation Are As Follows.

Care Shall Be Exercised To Prevent Any Damage To The Thin Bellows Section, Such As Dents, Scores, Arc Strikes And Weld Spatter.

No Movement Of The Pipe Expansion Joint (Compression, Extension, Offset, Rotation And Especially Torsion) Due To Piping Misalignment, For Example, Shall Be Imposed Which Has Not Been Anticipated And Designed Into The Movement Capability Of The Pipe Expansion Joint. If Such Movements Are Imposed, They Can Result In System Malfunction, Damage To The Bellows Or Other Components In The System. Specifically, Cycle Life Can Be Substantially Reduced, Forces Imposed On Adjacent Equipment May Exceed Their Design Limits, Internal Sleeve Clearances May Be Adversely Affected And The Pressure Capacity And Stability Of The Bellows May Be Reduced.

Any Field Pre-Positioning Shall Be Performed In Accordance With Specific Instructions Which Include Both The Direction And Magnitude Of The Movement.

Anchors, Guides And Pipe Supports Shall Be Installed In Strict Accordance With The Piping System Drawings. Any Field Variances From Planned Installation May Affect Proper Functioning Of The Pipe Expansion Joint And Must Be Brought To The Attention Of A Competent Design Authority For Resolution.

The Pipe Expansion Joint, If Provided With Internal Sleeves, Shall Be Installed With The Proper Orientation With Respect To Flow Direction.

After The Anchors Or Other Fixed Points Are In Place And The Piping Is Properly Supported And Guided, The Pipe Expansion Joint Shipping Devices Should Normally Be Removed In Order To Allow The Pipe Expansion Joint To Compensate For Changes In Ambient Temperature During The Remainder Of The Construction Phase.