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Compressor Line Sizing

compressor line sizing

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#1 erwinfs


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Posted 31 July 2018 - 01:15 AM

Dear All,


In an article, I read that there are maximum velocity criteria in compressor. That article states that compressor suction velocity criteria is 20 m/s and for discharge is 30 m/s. But the article does not give the reference for this criteria.


Can anyone tell which standard or code does this article refer?


Thank you.



#2 gegio1960


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Posted 31 July 2018 - 03:05 AM

constraints on compressor line sizing are usually given as rule of thumbs and each company has its own limits, often based on the compressor service. one can easily understand that could be some differences in compressing air, or hydrogen, or refrigerants....

anyway, the codes limit the gas velocities as a result of vibrations and noise.

the piping around any compressor is subject to detailed vibration (analog) study that can change the preliminary size of some pipe segments.

the 20-30 m/s reported by the article you mention are, for my experience, on the high side of the industry practice.

good luck!

#3 v7788999


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Posted 02 August 2018 - 12:42 AM

For gas velocity in the pipe line 20~ 30 m/s is not so fast. For gas line sizing normally will check the kinetic energy density x velocity ^ 2 shall be no larger than 10,000 kg/ms2

#4 breizh


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Posted 04 August 2018 - 04:44 AM

Hi ,

You may consider the standard attached .




Good luck


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Edited by breizh, 04 August 2018 - 10:16 PM.

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