Abstract
In gas applications with high-pressure drops and/or high-velocity gas flow, Acoustic Induced Vibration (AIV) occurs when very high sound levels are propagated in piping. If the sound levels are high enough, they will excite the circumferential vibration modes of the pipe. This allows the pipe to vibrate in and out as the sound wave moves through the piping. Most often this occurs downstream of pressure-reducing valves or safety-relief valves PSV‘s but AIV can occur at any location where the pressure drop or mass flow rate is sufficiently large. The level of pipe wall vibration is so high that it can induce fatigue cracking of the pipe and potentially cause catastrophic pipe failure. West Delta Deep Marine (WDDM) onshore of the slug catcher M9001 had a recent failure in the flare header as result of accumulating AIV effect. As a consequence of this failure Enppi/Burullus & Foster Wheeler undertaken an engineering assessment study to investigate the risk of AIV (Acoustic Inducted Vibration) for hall the plant & find out the corrective & engineering solution to protect the plant from any failure could be occurred as resulting of AIV affect.
