A Way to Reduce Flow Induced Vibration of Piping

Introduction
Flow induced vibration of piping system is difficult to eliminate by conventional piping supports which are snubber, restraint, etc, because the amplitude of flow induced vibration is small and the piping supports, which have small gap in its connecting part or itself, may allow piping motion in the gap. The amplitude of the vibration is small, but we should not be careless for the vibration. Flow induced vibration of piping may occur high cycle fatigue failure of piping or unusual noise.
We developed two kinds of damper for suppressing the small amplitude vibration of piping system and equipment. Both are effective to suppress the vibration whose amplitude is smaller than 1 mm.
Houde Damper
Feature
  • Good Damping Performance
  • Easy Set Up
  • Effective for Two Dimensional Vibration
  • Maintenance Free
  • No frequency tuning
  • Damping Source:
    Eddy current brake consisting of a pair of permanent magnets and a copper plate.
Configuration
Example of Application
Metallic Bellows Damper

Feature
  • High Damping Performance
  • Follow Pipe Motion by Flexibility of Metal Bellows
  • Maintenance Free
  • No Oil Leak
  • Damping Source:
    Flow Resistance of Viscous Liquid
Configuration

Damping Performance

Load - Displacement Curve
If you have comments or questions, e-mail hiro_kobayashi@ihi.co.jp.

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