Restricted orifice noise 1

[Adilr93]

Hello engineers

I just have an issue in my refinery we basically have 3 pumps of similar capacity which pumps gas oil so we have 3 ROs in separate lines when we pass the liquid through one of the ROs we always have a loud noise !! And what is funny is the design for all the 3Ros are similar we just have an issue with one.


We even tried to flip the direction of the RO but still the noise is their

What could be causing this phenomenon ?


Thanks

 

[EdStainless]

Just a little more pressure drop and more flashing/cavitation?
Just a location in the pipe where the sound resonates more?

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P.E. Metallurgy, consulting work welcomed

 

[Latexman]

Two orifices in series will probably quiet the situation.

It's not an elegant solution, but it is cheap!

Good Luck,
Latexman

 

[LittleInch]

Why the ROs?

A schematic with some pressures and flow would help.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[bimr]

Is the RO location close to a change in direction of the piping?

 

[pierreick]

Hi,
You may consider multi holes orifice to reduce the noise .

https://www.deltafluid.fr/en/produit/orifice-de-restriction-multi-orifices

Pierre

 

[RestrictFlow.com]

You need to provide more information for a solution. What is the fluid type, temperature, pressure before the orifice and after, pipe size. Do you have any bends in the pipe within so many pipe diameters of the RO? Does the noise occur when the pump reaches a certain threshold. If the other two RO's are effective, what is the difference with the third. It would be helpful to see schematics and any additional data to provide some direction for you. For the most part, its probably an easy fix. just need to pay attention to the data that you currently have and find the difference between the noisy and non-noisy RO's.

Mr.D