RE: calculation diameter of pipe

From: <Nashine>
Date: Thu Dec 11 2003 - 23:06:00 EST

Steps for calculation of pipe diameter :<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

Step I : Calculate the approximate diameter of pipe on basis of recommended velocity for the fluid. Using equation ; Q=AV.

Here, Q = Flow rate of liquid, A = inner area of pipe, V= Recommended velocity of fluid.

Step II : Calculate the pressure loss in the system using formula fenning's / Darcy's formula ; H=fLV2/2gd and P=?H

Here, H= Head loss of fluid, f=friction factor which depends on surface roughness for pipe, L=Equivalent length for piping comprising pipe fittings & valves etc, d= Inner diameter of pipe, g=gravitational acceleration, V= Recommended velocity of fluid, P=pressure drop, ?=Density of fluid

  Step III: Continue the above iteration till that pressure drop comes with in acceptable limit for the system.

  Step IV : Having acceptable pressure drop use formula H=fLVa2/2gd again to back calculate the actual velocity (Va).

  Step V: Use formula Q=Aa Va to back calculate the final annular / inside area (Aa ).

  Step VI: Having inner diameter and pipe thickness (which is to be separately calculated by strength calculation by using Tayler's formula or relevant piping codes) outer diameter can be selected from dimensional codes for pipe sizing e.g., ANSI B36.10/ANSI B36.19/ BS3600 etc.

  With best regards,
Akash K. Nashine
SIEMENS
Siemens Power Engineering
INDIA
*Mail : << mailto:A-K.Nashine@siemens.com <mailto:A-K.Nashine@siemens.com>

-----Original Message-----
From: erwin alamsyah [mailto:erwinalam@yahoo.com] Sent: 11 December 2003 08:01
To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] calculation diameter of pipe

Dear Sir/Madam

I would like to know how is calculate the diameter of pipe for water pipe, steam pipe , gas pipe and oil pipe.
Please let me know

Regards

Erwin

---

Do you Yahoo!?
Protect your identity with Yahoo! Mail AddressGuard

[Non-text portions of this message have been removed]

Yahoo! Groups Sponsor

ADVERTISEMENT  
<http://rd.yahoo.com/SIG=12ctgs443/M=267637.4116730.5333196.1261774/D=egroupweb/\
S=1705083319:HM/EXP=1071235414/A=1853618/R=0/*http://www.netflix.com/Default?mqs\ o=60178338&partid=4116730> click here   

<http://us.adserver.yahoo.com/l?M=267637.4116730.5333196.1261774/D=egroupmail/S=\
:HM/A=1853618/rand=981516097>

---

Discussion List sponsor: The fluid flow calculations website - www.LMNOeng.com - LMNO Engineering, Research, and Software, Ltd.

---

To leave this list, send a blank email to: PipingDesign-unsubscribe@yahoogroups.com

---

List home: http://groups.yahoo.com/group/PipingDesign/
<http://groups.yahoo.com/group/PipingDesign/>
Main site: http://www.pipingdesign.com <http://www.pipingdesign.com>

Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service
<http://docs.yahoo.com/info/terms/> .

[Non-text portions of this message have been removed] Received on Thu Dec 11 23:06:00 2003