Previous in Forum: Chemical Dozing Design in HVAC   Next in Forum: System Volume in HVAC
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
9 comments
Rate Comments: Nested
abin.thomas
Active Contributor

Join Date: Sep 2010
Posts: 10

Pipe Size Calculation?

09/06/2010 7:46 AM

How to calculate pipe diameter required, if we know the flow rate ?

we can derive a formula from burnulis equation for pipe diameter.

ie; square root of ( 4*flow rate)/3.14*velocity).

can we assume velocity as 1.3m/s?
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#1

Re: PIPE SIZE CALCULATION?

09/06/2010 8:35 AM

It's got stuff-all to do with Bernoulli's Equation.

Just keep the velocity in a liquid pipeline between 1 and 3m/s. If the flowrate is known, out drops the diameter.

"Simples!ξ"

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply Score 1 for Good Answer
No more "Almost" Good Answers.
Codemaster
Guru

Join Date: Jul 2005
Location: Stoke-on-Trent, UK
Posts: 4496
Good Answers: 137
#2
In reply to #1

Re: PIPE SIZE CALCULATION?

09/06/2010 2:16 PM

That's rght, and his formula isn't Bernoulli's Equation anyway.

Cheers..........Codey

__________________
 Give masochists a fair crack of the whip
Register to Reply Score 1 for Off Topic
Anonymous Poster
#3
In reply to #2

Re: PIPE SIZE CALCULATION?

09/06/2010 5:25 PM

then what is it? spread the knowledge ,
Register to Reply Score 1 for Off Topic
MJCronin
Power-User

Join Date: Oct 2009
Location: Central Midwest
Posts: 455
Good Answers: 38
#4
In reply to #3

Re: PIPE SIZE CALCULATION?

09/06/2010 6:46 PM

Where are you located guest ?....Spread the knowledge..!!

__________________
 We have met the enemy....and he is us. POGO
Register to Reply Score 1 for Off Topic
Codemaster
Guru

Join Date: Jul 2005
Location: Stoke-on-Trent, UK
Posts: 4496
Good Answers: 137
#7
In reply to #3

Re: PIPE SIZE CALCULATION?

09/07/2010 5:17 AM

It's just the formula for velocity = volume flow rate/pipe cross-section area.

__________________
 Give masochists a fair crack of the whip
Register to Reply
abin.thomas
Active Contributor

Join Date: Sep 2010
Posts: 10
#5
In reply to #1

Re: PIPE SIZE CALCULATION?

09/07/2010 2:08 AM

So about 1.5m/s appro. thank you.
Register to Reply
abin.thomas
Active Contributor

Join Date: Sep 2010
Posts: 10
#6
In reply to #1

Re: PIPE SIZE CALCULATION?

09/07/2010 2:09 AM

Is there any other easy formulas?
Register to Reply
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#8
In reply to #6

Re: PIPE SIZE CALCULATION?

09/07/2010 9:33 AM

Eh? No other formula is needed.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
ducon
Guru

Join Date: Dec 2006
Location: Hop around Toronto, New York & Karachi
Posts: 1876
Good Answers: 19
#9

Re: Pipe Size Calculation?

09/26/2010 10:12 AM

take pipe diameter in mm squared x velocity in meters/s x .0028 = m3/hr

say a 25 mm pipe , velocity 3 m/s = 625 x 3 x .0028 = 5.25 m3/hr

__________________
 I not only use all the brains that I have, but all that I can borrow. Woodrow Wilson
Register to Reply
Register to Reply
Have a Different Question?
9 comments

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

abin.thomas (2); Anonymous Poster (1); Codemaster (2); ducon (1); MJCronin (1); PWSlack (2)

Previous in Forum: Chemical Dozing Design in HVAC   Next in Forum: System Volume in HVAC

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Mechanical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (43 right now)
Show Members
Advertisement