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Failure analysis of Expansion Joint ( Bellows)


What is the Failure of bellows?

  • Improper installation
  • Improper anchoring and supporting of piping system
  • Bellows corrosion – both internal and external
  • System overpressure during operation or testing
  • Bellows vibration; mechanical or flow-induced resulting high cycle, fatigue caused by excessive vibration from connected equipment or the turbulent flow on from very high velocity
  • Excessive bellow deflection: Axial, lateral, and angular movement greater than design valve torsion of the bellows

Bellow





What happens when expansion joints fail?

Metal Expansion Joints include bellows which work like a sealed spring to allow expansion, flexibility, and movements. Without Bellows, pipes and hoses could crack and damage the various pressure compressing your entire system.














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