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ronjames05
Active Contributor

Join Date: Oct 2011
Posts: 15

How Do I Size a Water Header for 7 Units of Sand Filters

10/14/2011 2:33 AM

Hi to every one. I am working on sizing the main water header for 7 units of sandfilters in parallel all working simultaneously for a given flowrate of 360 m3/hr. The inlet and outlet pipe sizes of the sandfilters is 5" diameter with max capacity of 60 m3/hr each. Thank you very much
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Pathfinder Tags: pipe sizing
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Tornado
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Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
Good Answers: 795
#1

Re: How Do I Size a Water Header for 7 units of sand filters

10/14/2011 2:45 AM

12".

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ronjames05
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Join Date: Oct 2011
Posts: 15
#2
In reply to #1

Re: How Do I Size a Water Header for 7 units of sand filters

10/14/2011 2:48 AM

Thank your very much Tornado...but how did you get it....I might encounter same problem in the future and i would like to compute it by myself...
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Tornado
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Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

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Location: Richland, WA, USA
Posts: 21017
Good Answers: 795
#3

Re: How Do I Size a Water Header for 7 units of sand filters

10/14/2011 3:05 AM

Actually, I cheated.

The flow capacity of a pipe varies as the 2.5 power of its diameter (per Darcy-Weisbach). Thus (7 x 52.5)0.4 ≈ 10.9 inches; the next size up is 12".

For a more refined answer, use the total 360 m3/hr flow (~1584 gpm) and some online program such as Pipe Calculator. Depending on how long the pipe is, and the acceptable pressure drop, 10" might also do.

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ronjames05
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Join Date: Oct 2011
Posts: 15
#4
In reply to #3

Re: How Do I Size a Water Header for 7 units of sand filters

10/14/2011 3:19 AM

Again, thanks for your valuable help.
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