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Header Size

This document summarizes the header calculation for a project. It provides input data on flow rates and pipe sizes for 8 header inlets totaling 26,600 L/h. The designated header pipe size is 3" with an ID of 82.8 mm and length of 20 meters. The results show the header fluid velocity is 1.37 m/s, Reynolds number is 113621.1, and friction head is 1.1 meters with a pressure drop of 0.11 barg. The selected header pipe ID of 82.8 mm and size of 3" satisfies the criteria of being greater than the maximum inlet, having a velocity under 2 m/s, and a pressure drop less than 1 barg.

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Naufal Hadi
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460 views1 page

Header Size

This document summarizes the header calculation for a project. It provides input data on flow rates and pipe sizes for 8 header inlets totaling 26,600 L/h. The designated header pipe size is 3" with an ID of 82.8 mm and length of 20 meters. The results show the header fluid velocity is 1.37 m/s, Reynolds number is 113621.1, and friction head is 1.1 meters with a pressure drop of 0.11 barg. The selected header pipe ID of 82.8 mm and size of 3" satisfies the criteria of being greater than the maximum inlet, having a velocity under 2 m/s, and a pressure drop less than 1 barg.

Uploaded by

Naufal Hadi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Project No.

: Date : 24-Aug-23
Doc No. : Prepared by : NFL
Equipment tag : Checked by : Vegapunk
Project Name :

Tittle : Collecting Header Calculation Revision No. 0

1. Input Data

Flowrate Pipe Size *) Fluid velocity


No Header inlet
(L/h) NPS ID (mm) (m/s)
1 Header inlet 1 3.600 1" 27,86 1,64
2 Header inlet 2 8.000 1.5" 42,76 1,55
3 Header inlet 3 15.000 2" 54,76 1,77
4 Header inlet 4 1" 27,86
5 Header inlet 5 1" 27,86
6 Header inlet 6 1" 27,86
7 Header inlet 7 1" 27,86
8 Header inlet 8 1" 27,86
*) Nominal pipe size is according to ASME Sch40 pipe size

Total flowrate : 26.600 L/h


Average velocity : 1,65 m/s

2. Header Design

Designated header pipe size : 3" NPS


Designated header pipe ID : 82,8 mm
Designated header length : 20 meter
Header pipe roughness : Commercial steel Roughness : 0,046 mm

Fluid media : Water


Fluid density : 1000 kg/m3
Fluid viscosity : 0,001 Pa.s

3. Results

Header fluid velocity : 1,37 m/s


Header fluid Reynold number : 113621,1
Header fluid Reynold criteria : Turbulence
Friction factor : 0,012
Header friction head : 1,1 meter
Header pressure drop : 0,11 barg

Now with above results, the header size is based on this following criteria. The size
will satisfied if the results fullfill at least two criteria

Header size is > 1.33 times of maximum inlet Yes


Header velocity is not over 2 m/s Yes
Header pressure drop less than 1 barg Yes

Selected header pipe ID : 82,8 mm


Selected header pipe size : 3" Satisfied

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