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Hydraulic equations

What do you all us for your engineers field operations? We use the rule of eights and have some cheats that we memorize to go with those cheats.

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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?; ▶ Reply to This

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.; ▶ Reply to This

Permalink Reply by John "Cliff" Berkshire on December 30, 2008 at 3:57pm: 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.; ▶ Reply to This

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; ▶ Reply to This

Permalink Reply by John "Cliff" Berkshire on December 30, 2008 at 8:17pm: cliffberkshire@comcast.net; ▶ Reply to This

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!!; ▶ Reply to This

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.; ▶ Reply to This

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.; ▶ Reply to This

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; ▶ Reply to This

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; ▶ Reply to This

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.; ▶ Reply to This

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; ▶ Reply to This

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