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2 comments
Active Contributor

Join Date: May 2010
Posts: 12

Head Calculation

04/14/2011 4:52 AM

Dear sir,

I have calculated friction loss in 800m long 80NB FRV pipe with flow of 40m3/hr having 1100kg/m3 density & viscosity 10cp.

The loss comes around 65m.

I am in doubt that it seems high please advise me is it correct.

Guide me to get accurated result.

Thanks & Regards

Santosh

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Join Date: Apr 2011
Location: Tunisia- North Africa
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#1

Re: Head calculation

04/14/2011 6:43 AM

i think it is correct:

Assumption: nominal diameter (ND) is confused with internal diameter (ID)internal , relative roughness=0.004; smooth pipe.

1/ case ND=3"=76.2 mm ***v=2.437m/s ***Re=20432 ***Moody factor=0.0335*** Result loss=106m.

2/case ND=3"1/2=88.9 mm ***v=1.79m/s ***Re=17513 ***Moody factor=0.034 *** Result loss=50m.

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Join Date: Oct 2008
Location: Want to be: 34° 34' 21.60" N, 92° 55' 42.28" W Really am in Arizona
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#2

Re: Head Calculation

04/14/2011 3:29 PM

If in doubt, just go to one of the many free calculators on line, such as, but not limited to:Head Loss Calculator - Reef Central Online Community

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