Acoustic Induced Vibration (AIV) in Piping System
Dr. Javier Blasco Alberto
Associate Professor at School of Engineering and Architecture (Univ. Zaragoza)
(*) Written by Karen Oliver, instructor of InIPED's Pipe Stress Diploma.
The Acoustic Induced Vibration (AIV) is generally applicable to lines in gas service. In a Gas System, high levels of high frequency acoustic energy can be generated by a pressure reducing device such as a Relief valve, Control valve or Orifice plate. The amplitude of this energy is governed primarily by the Flow rate & Pressure drop. Excitation due to this can lead to fatigue failure of welded downstream connections. Piping downstream of Pressure reducing devices as below is prone to Acoustic Induced Vibration AIV.
- Relief Valves.
- Blow Down valves & Restriction Orifices.
- Pressure reducing Valves.
- Compressor recycle Valve.
- Choke Valve.
Assessment of the risks related to AIV can be carried out for pressure reducing devices on gas systems, such as control valves, pressure relief valves, and blowdown valves, to screen for this failure mechanism, through prediction of the acoustic noise generated downstream, and estimation of the risk of failure of the piping. Detailed investigation and the development of solutions would then be conducted for any sections considered to be at high risk.
More information:
Sup. de Piping en Engineer & Construction
5 年Muy bueno Alberto.
Altrad Babcock - Principal Piping Engineer Major Projects - Green Energy Transition
5 年Important reminder of failure avoidance. This is often overlooked or forgotten. Design errors don't evaporate, they travel down the conveyor belt of ownership, taking root on their journey if ignored, and growing into a fully fledged problem. At some point they will appear, sometimes causing injury and harm. Stop them from taking root by denying them opportunity. Take time to design!
Associate Professor at School of Engineering and Architecture (Univ. Zaragoza)
5 年Thanks to Karen Oliver?for providing the texts for this article. She is instructor of the online Diploma on Pipe Stress and Flexibility organised by InIPED - International Institute of Plant Engineering and Design?