Expansion Joints

Expansion JointsExpansion Joints are flexible connectors designed to provide stress relief and seal in media for ducting systems throughout a wide range of applications. They can be supplied from many types of materials including hi-temperature fabrics and low-temperature elastomers and fluoroplastics. There are two basic forms of construction depending on the number of layers in the expansion joint: single layer construction and multi-layer construction. Expansion joints are necessary to provide flexibility in the duct between fixed and non-fixed (and non-load bearing) applications. There are four main situations:

  • Expansion or contraction of the duct due to temperature changes:
  • Isolation of components to minimize the effects of vibration or noise.
  • Movement of components during process operations.
  • Installation or removal of large components and erection tolerances.

There are two basic types of Expansion Joint: Non-metallic and Metallic

Expansion Joints1

  • Advantages of Non-Metallic Expansion Joints include:
    • Large movements in a short length.
    • The flexible element portion of the expansion joint assembly can be replaced simply and economically.
    • Ability to absorb simultaneous movements easily in more than one plane.
    • Very low forces required to move the expansion joint.
    • Modern materials enable the use in aggressive chemical conditions.
    • Can be hoisted into place with a minimum of, or sometimes no, field assembly.
    • Provide a high degree of vibration damping and are relatively lightweight.
    • Lower overall cost.

Expansion Joints2

FLEXTECH INDUSTRIES IS A PROUD MEMBER OF THE FLUID SEALING ASSOCIATION.

Expansion Joints3

  • Advantages of Metallic Expansion Joints include:
    • Can take very high pressure.
    • Ability to absorb simultaneous movements easily in more than one plane.
    • Can be hoisted into place with a minimum of, or sometimes no, field assembly.
    • We design/fabricate all square/rectangular shapes in our Clinton, MO facility. For round shapes please contact our Langley, BC Canada office at the following link: www.flextech-ind.com.

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