I seek everyone’s help in resolving the issue of pipeline vibration
Thread Content
Help: We have a DN250 propane loading pipeline, with an electric ball valve at its end. When this valve is used to control the flow rate, severe vibrations occur in the pipeline; however, the vibrations decrease when the valve is opened further or when the gate valve downstream is closed. What could be causing this? Thank you, master, for your guidance
For controlling flow, it is recommended to use control valves.
It is recommended to install piston-type electro-hydraulic valves in the dock loading system to effectively prevent water hammer and pipeline vibration issues.
Ball valves are used to control flow – isn’t that inappropriate?
This phenomenon is mainly caused by pipeline water hammer; it is also related to the proper matching between the pump and the pipeline design. In addition, an excessive pressure difference at the liquid level in the tank can also lead to it
It has little to do with pipeline installation; the main issue is an incorrect approach to process control. End ball valves should not be used to control the flow rate during loading, as closing the valves suddenly causes water hammer effects. Pipeline vibration is the least serious consequence of this, and it’s possible that the pipelines could even fall off their supports. The best solution is to employ process measures such as variable frequency control for the loading pump or pressure-controlled backflow to the tank farm; by closing the valves during loading, when pipeline pressure rises, the pump can automatically adjust its frequency to reduce flow rate, or flow can be directed back to the tank farm via pressure control, thereby preventing vibrations in the pipelines.