SHAH ENGINEERS (I) offers all types of bellows and expansion joints. Each type has advantages and limitations, which when applied correctly, can provide the flexibility, load reduction, structural integrity and reliability desired in a piping system.

Single Expansion Joint (Also know as: Single Bellows Assembly)
The simplest type of expansion joint consists of a single bellows element welded to end fittings, normally flange or pipe ends. The single bellows can absorb small amounts of axial, lateral and angular movement with ease, but adequate anchors and guides must be provided.

Features:

  • Absorbs small amounts of axial, lateral, and angular movements
  • Deflect in any direction
  • Most economical
  • Must be guided
  • Requires main and directional anchors

Universal Expansion Joint (Also know as: Universal Bellows Assembly, Universal, Tandem, Double, Dual)
This assembly consists of two bellows connected by a center spool piece with flange or pipe ends. The universal arrangement allows greater axial, lateral and angular movements than a Single Bellows Assembly. Increasing the center spool length produces increased movement capability. Like the single, adequate anchors and guides must be provided.

Features:

  • Absorbs large amounts of lateral deflection
  • Unit length does not change with heat
  • Eliminates pressure thrust load

Hinged Expansion Joint
A hinged Expansion joint is an assembly designed to absorb angular rotation in the plane perpendicular to the hinge pins. The hardware consists of two hinged plates 180° apart and joined to the end connection. The hinged hardware is designed to absorb the pressure thrust of the Expansion joint assembly.

Features:

  • Angular motion in all planes
  • Eliminates pressure thrust forces
  • Prevents torsion on bellows
  • Most efficient in absorbing thermal deflections

Gimbal Expansion Joint
A gimbal Expansion joint is an assembly designed to absorb angular movement in any plane. The gimbal hardware consists of two sets of hinges, connected to a common

Features:

  • Absorbs angular rotation
  • Eliminates pressure thrust forces
  • Prevents torsion on bellows