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Relative Roughness For Brownfield Piping/pipeline

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#1 SawsanAli311


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Posted 30 January 2019 - 12:25 PM

Hi Everyone, 


I would like to get more references on the considerations of the values of relative roughness when performing hydraulic pressure drop calculations for existing piping/pipeline systems. Many state that 10 times the new pipe's relative roughness to be considered... Any other thoughts?

#2 breizh


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Posted 30 January 2019 - 08:33 PM

Hi ,

In the document attached , you will find some data about absolute roughness. on page 2.

the figures are  quite standard .

Probably you wll need to do some sensitivity analysis.


Good luck


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Edited by breizh, 31 January 2019 - 06:43 AM.

#3 SawsanAli311


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Posted 01 February 2019 - 11:23 AM

Thank you very much Mr.breizh

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