Hydraulic equations

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Permalink Reply by William Anderson on December 30, 2008 at 11:08am

Colin, are you asking for friction loss calculations or gpm flowed?

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Permalink Reply by troy kerckhove on December 30, 2008 at 2:03pm

We put together laminated cheat sheet with flows and friction lose. Also have preset pressure for different lines and conditions.

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Permalink Reply by Joel Holbrook on December 30, 2008 at 5:27pm

Brother Colin, we too use a laminated friction loss chart. It is set by nozzle type with constant psi settings, any appliances with constants (psi), it has the various hose diameter combinations for supply line and FL for common gpm rates per 100' ft of hose. it has the pre set flow rates for 200' lengths of attack line both 1 3/4 and 2 1/2, based off of manufactures recommedation for maximum flow for the nozzles we use (LP TFT). Additionally, it has elevation, stand pipe and sprinkler connection constants. If you give me your email I will get an e copy and send it to you. Be safe

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Permalink Reply by Joel Holbrook on December 30, 2008 at 8:47pm

Brother Cliff, i work on Thursday, i will email the Dept training officer to send me the ecopy and I will forward it to you. Be safe!!

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Permalink Reply by troy kerckhove on January 1, 2009 at 8:33am

Used multiple sources hose manufacture, nozzle supplier, dept testing, caculaion based on nfa formula. Great book to help understand is FPP Fire Service Hydraulics and Water Supply. Drop me A message and email you a copy of what I put together for our drivers.

John "Cliff" Berkshire said:

How did you figure the equations on your cheat sheet? Always been interested in making one but wanted to see what other depts had used.

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Permalink Reply by Ian Bruzenak on January 2, 2009 at 5:04pm

I would check your flows while using any calculations to see what is really happening with your equipment. There is no substitute for reality. Then apply the findings to your line configuration and department practices. And then flow it again to be sure. Then make your cards. Give one to every driver and have them on each pump panel.

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Permalink Reply by Colin Port on January 3, 2009 at 9:52am

I would appreciate that, colin@groomcreek.org, Thanks and I will email one of ours to you when our office remodel is done.

Joel Holbrook said:

Brother Colin, we too use a laminated friction loss chart. It is set by nozzle type with constant psi settings, any appliances with constants (psi), it has the various hose diameter combinations for supply line and FL for common gpm rates per 100' ft of hose. it has the pre set flow rates for 200' lengths of attack line both 1 3/4 and 2 1/2, based off of manufactures recommedation for maximum flow for the nozzles we use (LP TFT). Additionally, it has elevation, stand pipe and sprinkler connection constants. If you give me your email I will get an e copy and send it to you. Be safe

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Permalink Reply by Colin Port on January 3, 2009 at 9:55am

Thanks for all of the input. Feel free to email me any of your dept. calculation cheats. colin@groomcreek.org

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Permalink Reply by Adam Miceli on January 5, 2009 at 7:37am

I'd second running your own tests and developing your own cards. We've found that different hose and discharges have a significant difference in FL. We use the C Formulas as a baseline, but nothing beats a calibrated flow meter and pitot gauge to determine actual friction loss and preset gauges.

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Permalink Reply by David Robertson on January 25, 2009 at 11:15am

Colin, I was reading your post and it is very interesting as I am in the process of developing a power point traing class on friction loss, fire flow and pump panel operation. Part of what I wanted to develop and provide for our equipment is just what you were talkin' about...ie Laminated cheat sheet for pump operators. I would greatly apreciate any info you could forward to me to help in my development of these sheets ... thanks Dave firehouse12002@yahoo.com

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Permalink Reply by Daniel Cook on January 28, 2009 at 9:31am

I would like to have a copy of your sheets if possbile as well. dcook82@verizon.net. Thanks.

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Permalink Reply by Michael Grcich on January 28, 2009 at 9:56am

Here is a power point presentation you may wish to view.
http://www.tft.com/newsite/literature/library/files/05fire%20ground...

If you contact the companies that manufacture the hose, nozzles and other water delivery applicances your department has in service they typcially are willing to supply you with the cards or slide charts that will have the information you are looking for.

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