Jun 03, 2017 · The 115 PSI represents the appliance friction loss of 15 and the nozzle pressure for the automatic nozzle, which is 100 PSI. Now, for whatever reason, the automatic nozzle is being replaced with the with the 1-3/8” tip. The pump discharge pressure for the 1-3/8” tip at its rating of 500 GPM has a friction loss of. 2 PSI for the 5” hose. Used as fire hose outlet connections; Cast brass*, 300 PSI *Optional finishes: Polished brass, ... Hose valve, 2 1/2" Female NPT inlet x 2 1/2" Male hose thread outlet. 'Starflex' Fire Hoses are high quality hoses, widely used by fire brigades and for industrial applications. Manufactured with an all synthetic woven polyester jacket for light weight and strength, they have a smooth black synthetic rubber lining to greatly lower friction loss. Do you use long preconnects, or hose from a bulk hose bed then you may want to look at 1 3/4 to reduce friction loss. Possibly even 2" hose would work best for you. On the other hand if your using skids attached to larger diameter lines then the 1 1/2 may be just fine. Feb 01, 2017 · You also recall from the class that the friction loss in five-inch large diameter hose (LDH) is dependent on the volume of water being flowed and the distance of the stretch. A relay flow of 1,500 ... The answer reflects the amount of pressure (psi) lost due to friction loss. That amount of pressure however, is directly affected by the amount (gpm) of water flowing through the hose. So, the higher the flow, the greater the friction loss. Try the formula with various volumes of water being flowed, and the principle should become evident. Jul 06, 2015 · The first formula is The Darcy-Weisbach formula. The other that is less accurate is Hazen-Williams Equation. Each of these formulas have tables of piping material and the appropriate friction constant. If you Google Friction loss in a fire hose. you find there is a calculator. Fire Hose Friction Loss Calculator I am not sure which formula it ... Using 2" White Double Layered Fire Hose Without Fittings An uncoupled fire hose is a fully functioning fire hose without the connector ends. There's lots of reasons someone would want a fire hose without the connectors. Here's just a few: You already have your own 2" Inch couplings and you can connect them yourself. PVC - Friction Loss in Fittings and Equivalent Length - Minor loss in PVC and CPVC fittings as equivalent length of straight pipe; PVC Pipes - Friction Loss and Flow Velocities Schedule 40 - Water flow in thermoplastic PVC and CPVC pipes Schedule 40 - friction loss (ft/100 ft, psi/100 ft) and flow velocities at dimensions ranging 1/2 to 16 inches Friction loss for 50' between 7 and 8psi @ 250GPM. Perform through all standard destructive tests (define this?). Hose shall be fully NFPA 1961 complaint and preferably (full or partial) compliance with UL 219, FM Class Number 2111 and MIL-H-24606B. An internal diameter that is the actual size of the marked hose size on the jacket. Hose length ... Generally 3" hose with 2 1/2" couplings has a friction loss equal to the flow in 100's squared, or a loss of 25 psi / 100 ft. at a flow of 500 gpm. If we use a K value of 243 and do the calculations for 100 ft. of 3" hose - we get 243 * 5 * 5 * 1 / 3 * 3 * 3 * 3 * 3 or 243 * 25 / 243 = 25 psi per 100 ft. By firefighters, for firefighters!Firenuggets.com! Copyright,!Firenuggets.com! Planning’a’Hoseand’NozzleSystem’for’EffectiveOperations’ Just what you need to calculate the most precise friction loss for a wide range of Key Hose products. Select a Hose: 1½" Key Big-10 1½" Key Eco-10 1½" Key Dura-Flow 1¾" Key Combat Ready 1¾" Key Combat Sniper 1¾" Key TRU-ID 1¾" Key Big-10 1¾" Key FDNY Spec 1¾" Key Eco-10 1¾" Key Key-Lite 1¾" Key Magnum 1¾" Key Dura-Flow 2" Key Combat Ready 2" Key Combat Ready with 2½" Coupling 2¼ ... Hose line frictional loss: These can be significant and can have a devastating effect on flow rates. relying on old fashion fire ground estimations of frictional loss is inappropriate and dangerous. resent research by an acknowledged expert in pumping and water delivery flow rates has identified that the frictional loss in hose are much higher ... 2 ½" VIPER BLUE DEVIL® Nozzle Model Length Weight Swivel Inlet (in.) Nozzle Flow Effective Reach inch cm lbs kg gpm lpm ft m BD 9520 2 ½" 12.99 33 7.28 3.30 2 ½" 95 360 115 33 125 470 128 37 150 560 131 38 200 750 138 39 BD 12250 2 ½” 13.36 34 7.28 3.30 2 ½" 125 470 128 37 150 560 131 38 200 750 138 39 250 950 144 41 7. Know safe driving procedures foe driving fire apparatus and common causes accidents. 8. Describe the principles and characteristics of water and pressure as they relate to fire streams . 9. Define pounds per square inch and know the formula computing friction loss. 10. Describe the types of fire streams and general use of each. 11. Feb 01, 2017 · You also recall from the class that the friction loss in five-inch large diameter hose (LDH) is dependent on the volume of water being flowed and the distance of the stretch. A relay flow of 1,500 ... Apr 13, 2012 · Ok, so now let's talk friction loss. The formula is: FL=CxQ 2 xL. "C" is the hose "Coefficient", also referred to as the "Constant" or the "C-Factor". It doesn't matter really, it is the same thing. It just depends on who is teaching the class you are taking. Calculate flow and pressure loss base on nozzle size, diameter and length of hose. ... Slide Rule-- Fire Stream / Friction Loss (NFES 000897) NIFC. SKU: 850-55901. Indication: The Driver Operator needs to be able to calculate friction loss in fire hose in order to produce an effective fire stream. Procedure: In the field, we calculate friction loss in 3” hose by using the “Q2” method, and friction loss in 2½” hose by the “2Q2”. Friction loss in 1¾” hose is calculated by memorization. Apr 10, 2006 · If we use the Darcy-Weisbach formula to calculate the friction loss for 400 gallons of propylene glycol with a 50% solution flowing through 30 feet of 2.5-inch Schedule 40 steel pipe at 60°F and then again at -20°F, let's analyze the results. The wide range flow of 50-350 GPM allows the handline nozzle to be used on ANY SIZE HOSE. TFT’s Jumbo Low Profile Ball Intake Valve Jumbo Low Profile Ball intake valves reduces friction loss and maximizes flow through a huge 5.25 inch (133mm) diameter waterway. Designed for use with 5 inch (125mm) hose. an extremely low friction loss for maximum flow. Tough and ready for action but light in weight. Strong, compact and practical, and will fit on most hose storage devices. Rack hose is available folded for standard pin racks in 50' (15m), 75’ (22.5m), and 100’ (30m) lengths. Specify folded, coiled, or number of pins for rack. PRESSURE ... Determine the lift (in feet) 2. Determine the friction loss in the intake hose used 3. Add lift and friction loss together 4. Divide by 2.3 (2.3 is the amount of lift (in feet) that 1psi of water pressure will support) EXAMPLE: A pumper is discharging 1000 GPM at a pressure of 142psi. Fire Engine Operator Tools. Friction loss calculator Quickly solve friction loss for any length, GPM & hose sizes. Ex: 200 ft 1 3/4" hose with 150 gpm & 200 ft 2 1/2" hose with 300 gpm; Friction loss tables List of printable friction loss tables for all common hose sizes Ex: 1 3/4" Friction Loss Table & 2 1/2" Friction Loss Table; Friction loss ... Williams, Gardner Stewart; Hazen, Allen (1914), Hydraulic tables: the elements of gagings and the friction of water flowing in pipes, aqueducts, sewers, etc., as determined by the Hazen and Williams formula and the flow of water over sharp-edged and irregular weirs, and the quantity discharged as determined by Bazin's formula and experimental ... Other Hart & Cooley Mobile Tools. Friction Loss Calculator for Flexible Ducts. Friction Loss Calculator for Sheet Metal Ducts. Equivalent Duct Calculator (Round vs Rectangular) Polyester fire hoses high quality lay flat hose for all fire fighting operations. Circular woven jacket out of 100% high tenacity synthetic yarn with an inner liner made out of a vulcanized high quality EPDM compound. Length each roll : 20 meter or 30 meter; Size diameter: 1 ½“ (38) Inch (mm), 2 ½“ (65) Inch (mm) Working pressure: 16 bar The following table gives flow rate Q such that friction loss per unit length Δp / L (SI kg / m 2 / s 2) is 0.082, 0.245, and 0.816, respectively, for a variety of nominal duct sizes. The three values chosen for friction loss correspond to, in US units inch water column per 100 feet, 0.01, .03, and 0.1. The code basis is from NFPA 13, Section 12.2 (2016 Edition) 12.2* Hose Connections. 12.2.1 Small hose connections [11⁄2 in. (38 mm)] shall be provided where required by the authority having jurisdiction in accordance with 8.17.5 for first-aid fire-fighting and overhaul operations. 12.2.2 Small hose connections shall not be required for the protection of Class I, II, III, and IV commodities ... Determine the pressure lost due to friction in a hose assembly in which two 3-inch hoses with 2.5-inch couplings, each 500 feet long, are used to supply a siamese to which 250 feet of 1.5-inch hose is attached. The nozzle on the attack line is flowing 150 gpm. A. 135 psi. B. 135.25 psi. C. 137.25 psi. D. 145 psi This calculator uses this formula to determine the Total Flow Rate, Total Pipe Length, and Friction Loss. Total Pipe Length. Where: = Total Pipe Length (ft) = Number of sprinklers per line = Distance between sprinklers, sprinkler spacing (ft) Total Flow Rate. Where: = Total Flow Rate (gpm) = Sprinkler flow rate (gpm) = Number of sprinklers per line

The friction loss difference in a short lay isn't such a big issue. The reall difference shows in both higher flows and longer distances. The truth is though, you can flow 1000 gpm through multiple 2 1/2's, multiple 3's, single 4, or single 5 inch lines. Frankly, I would rather lay out a single 5 inch line and then pick up a single 5 inch line than lay out from multiple 2 1/2 lines from mult