Pipe Sizing

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kumskip Active Contributor Join Date: Apr 2008 Posts: 15	Pipe Sizing 03/05/2009 4:44 PM
	Pipe sizes are selected based on certain velocity ranges. What is the problem if my pipe is too large that the velocity would fall much below the recommended minimum velocity? say for steam and compressed air piping systems.
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Kilowatt0 Guru Join Date: Aug 2007 Location: Earth - I think. Posts: 2143 Good Answers: 165	#1 Re: Pipe Sizing 03/05/2009 5:33 PM
	1. Condensate 2. Cost - Of every component __________________ TANSTAAFL (If you don't know what that means, Google it - yourself)
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sb Guru Join Date: Mar 2007 Posts: 2550 Good Answers: 103	#3 In reply to #1 Re: Pipe Sizing 03/06/2009 8:11 AM
	Should have made the first point clearer Anyway GA for the minimum answer (BTW what happens when temperature drops below 100 ? do you migrate? ) __________________ Fantastic ideas for a Fantastic World, I make the illogical logical.They put me in cars,they put me in yer tv.They put me in stereos and those little radios you stick in your ears.They even put me in watches, they have teeny gremlins for your watches
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Abdel Halim Galala Guru Join Date: Feb 2007 Location: Cairo, Egypt Posts: 1733 Good Answers: 248	#2 Re: Pipe Sizing 03/06/2009 2:01 AM
	The following solved example is very interesting and is a good representation to learn how to find the correct size of a piping system to fulfill the requirements of the required flow rate and recommended velocity per each fluid, also the example shows when you have to install a pump into your piping system: please see my post 6 of CR4 Thread Selecting Pipe Size. __________________ It is better to be defeated on principles, than to win on lies!
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Anonymous Poster	#4 Re: Pipe Sizing 03/06/2009 12:27 PM
	Higher Pipe size means higher cost and so more losses
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Tom Kreher Power-User Join Date: Nov 2006 Location: Oregon Posts: 238 Good Answers: 5	#5 Re: Pipe Sizing 03/06/2009 4:16 PM
	For compressed air plumbing there is no such thing as too large or a reservoir that it too large. If the velocity of your compressed air is laminar due to generous (Approx 2 times the diameter listed in most charts or tables) you will almost eliminate pressure drop from the pipes or plumbing. There are charts that list the HP used to compress to different pressures. If you over compress because you plumbing is causing pressure drop you are wasting electrical energy as long as air is being used. I don't know jack about steam but suspect you may have some cooling issues with over sized pipes. Tom
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Abdel Halim Galala (1); Anonymous Poster (1); Kilowatt0 (1); sb (1); Tom Kreher (1)

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