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[ISLAM MOHAMED]

We have an application for safety valves installed at auxiliary steam line, the noise of this valves is exceeding the max project environmental requirements (95 dBA),  but this valves will not discharge to atmosphere as there's venting discharge piping about 10 Mt. 

 

The question: does this discharge piping can reduce the noise level after the safety valve

and does VDMA 24422 can calculate the noise attenuation and what's the equation?

 

Please find attached sample for the discharge pipe isometric at the safety valve outlet.

 

Note: we don't want to use the silencer after the safety valves. so we are trying to reduce the noise by extending the discharge piping at the safety valve outlet.

 

 

Also, please advise if the insulation of the piping will reduce the noise and what's the equation or the values.

 

 

Thanks,  

Attached Files

•  Noise calc points.pdf   61.97KB   41 downloads
•  safety valve piping at outlet.pdf   966.61KB   38 downloads

Edited by ISLAM MOHAMED, 07 February 2018 - 08:15 AM.

[Bobby Strain]

Most of the noise is generated from the discharge pipe outlet. You are unlikely to meet your specified sound pressure level without a silencer.

 

Bobby