Gpm Formula Firefighting

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The formula for determining friction loss rate (FLR = 2Q2) is based on gpm through 2 1/2 hose. All flow rates through various size hoses must be converted to an equivalent flow ( EF ) as if it were flowing through 2 1/2 hose.

Guide For Determination Of Required Fire Flow Final05-23-08doc

Needed Fire Flow Formula To estimate the amount of water needed to fight a fire in an individual, nonsprinklered building, ISO uses the formula: NFF = (C i)(O i)[(1.0+(X+P) i] where NFF i = the needed fire flow in gallons per minute (gpm) C i = a factor related to the type of construction O i = a factor related to the type of occupancy X

Certified Pump Operator HYDRAULICS WORK BOOK

manufacturers of hose and nozzles, the friction loss formula (2Q 2 + Q) is inaccurate. The new materials are much less resistant to water flow, and therefore have less friction loss. Consequently, IFSTA has developed the Coefficient Formula to accommodate the new hose and/or nozzles. The Coefficient Formula (Coefficient x Diameter Squared x Length

Fire Pumps CHAPTER 4 - NFPA

Chapter 4 Fire Pumps 89 Program for Individual Systems Suction piping shall be fl ushed at a fl ow rate not less than indicated in Table [Exhibit 4.1] and Table [Exhibit 4.2] of NFPA 14(2010) or at

IMPORTANT NOTE: APRIL 4, 2006 - 1Stop Continuing Ed

Note: Rated capacity = GPM NFPA 1901, 1999 edition, recognizes pumper fire apparatus with fire pumps ranging from 750 GPM to 3000 GPM All pump ratings increase in 250 GPM increments. Pump sizes commonly manufactured 750,1000, 1250, 1500 and up to 3000 GPM 150 PSI (100%) 200 PSI (70%) 250 PSI (50%) 750GPM 525GPM 375GPM


volume of fire. The Iowa State formula (L 2 W 2 H / 100 4 gpm) has been taught to new firefighters since it was developed at Iowa State University in the 1950s. It calculates 13.44 gpm as the minimum required to control a fire in a 12- 2 14-foot room with eight-foot ceilings.

Driver/Operator 1B Cheat Sheet - Journey To Firefighter

Siamese - Divide nozzle GPM by 2 - Never exceed PDP of 250 psi - Intake (residual pressure) should never drop below 20 psi. Field Hydraulics 2½ Handline (smooth bore) TIP GPM FL / 100 NP ⅞ 150 5 PSI 50 PSI 200 8 PSI 50 PSI 1⅛ 250 13 PSI 50 PSI 1¼ 300 21 PSI 50 PSI 2½ Master Streams (smooth bore)

Hydraulic Calculations: One Method for Adjusting Flows for

Understanding that we will have to convert Q to gallons per minute the formula needs to be modified further to insert 7.48 gallon per cubic foot and 60 seconds in one minute: Q = 60 x 7.48 x πd² ÷ 576 √2gh When simplified, and the discharge coefficient (c) is added for the orifice, the formula is written as: Q = 29.84cd²√P

Fire-fighting Flow-rate

firefighting in the fuel-phase 25mm High-pressure hose-reels versus low-pressure lay-flat hose-lines in both the gaseous and fuel-phases of firefighting Critical flow-rate versus Tactical flow-rate Heat absorption efficiency of a fire-stream Fire-ground Formula for estimating needed fire flows

Driver Operator Manual Chapter 3 - Fireground Hydraulics

if the flow is 200 gpm, take 2 and multiple it by 2 (the 1st digit of the next number down the column). The answer is 4 which is the friction loss in 100 feet of 3 hose. Let s try a flow of 350 gpm, 3 x 4 equals 12, which is the friction loss in 100 feet of 3 hose. This method is known as Q2 or condensed Q. GPM Friction Loss in 100

The 1.75 Nozzle

with the NFA Fire Flow Formula and NFPA 1710 s 300 GPM first-alarm flow rate, and the heat produced at a residential structure fire of low risk (using a field estimate). The 160 GPM target minimum flow allows for further firefighting capability giving a greater margin for safety that accounts for fireground obstacles and conditions.

Distribution System Requirements for Fire Protection

The maximum required fire flow for a single fire event is 12,000 gpm (757 L/sec). Insurance Services Office Method The ISO s technique for calculating required fire flow is documented in its publication Fire Suppression Rating Schedule. The term used in that document to describe the fire flow requirement is needed fire flow (NFF).

Automatic Sprinkler System Calculations

ranging from a density of 0.1 gpm/ft 2 (3.7 mm/min) over 5000 ft 2(500 m ) to 0.17 gpm/ft (6.9 mm/min) over 1500 ft 2(139 m ). Either of these two points, or any

Another Look at Needed Fire Flows By Larry L. Pierson Jr

to note that the result is liters per minute, not gallons per minute. All calculations provided in the table have been converted to imperial measure (feet, gallons etc.). The formula also has two fire load categories; Normal (M2x4 or Square Meters x 4) (basic ally an empty room) and Heavy (M 2 x6 or Square Meters x 6) (basic ally


POCKET FLOW GUIDE (GPM) 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 105 110 115 120 125 130 135 140 145 150 175 200 P.O. Box 1127, Elkhart, IN 46515 1.574.295.8330 1.800.346.0250 Email: [email protected] SMOOTH BORE POCKET FLOW GUIDE 1. Print this page on your printer. 2. Cut out the entire chart below. 3.

Tactics and the Assessment Center - Endeavor Business Media

GPM, line size Fire flow formula Back-up lines, hydrants Overhaul When and why tools new/old Ventilation Purpose What form & why Wind direction Salvage On arrival Takes on many forms Cover, move, remove 305.772.0595

DPO Hydraulics Refresher - LJVFD

GPM Formula - It is possible to determine water flow from any solid stream nozzle when the nozzle pressure and tip diameters are known. The following formula is used to determine the GPM flow of solid stream nozzles. GPM = 29.7 d² √NP Where: GPM = discharge in gallons per minute 29.7 = a constant d = diameter of the tip measured in inches

01 General Foam Information - Chemguard

spill fire with low water solubility is 10 gpm/sq. ft. Remember the protein and the fluoroprotein foam solutions require an application rate of 16 gpm/sq. ft. AFFF is suitable for use in a premix state and is suitable for use with dry chemical extinguishing agents. ALCOHOL RESISTANT-AQUEOUS FILM FORMING

HANDLINE Flow & Nozzle Reaction Chart

(1) Number on top in each box indicates flow (GPM), and number on bottom indicates nozzle reaction (LBS). (2) Flows may vary with brand or condition of hose. (3) Flows are approximate and do not reflect losses in preconnect piping. 150 ft. 150 ft. 150 ft.200 ft. 200 ft. 200 ft.250 ft. 250 ft. 250 ft. 50 225 200 175 150 125 100 75

Evaluation of Fire Flow Methodologies

Jan 24, 2014 water requirements for firefighting include the rate of flow, the residual pressure required at that flow, the flow duration, and the total quantity of water required. As described in the NFPA Handbook [1], the American Water Works Association (AWWA) [2] defines the required fire flow as the rate of water flow,

A Firefighter s Guide to Foam

Class A foams may be used as a firefighting agent or as a fire barrier. When used as a wetting agent, the concentrate lowers the surface tension of the water, allowing better penetration into deep seated fires. As a fire barrier, Class A foams increase moisture con-tent in Class A combustibles, preventing the ignition of these type fuels.

Quick Drills: Fire - Pump Operations-Relay Calucaltions

@ 1250 gpm 3 Engines Two relays: engine at the hydrant relays 500 ft. to the intermediate engine and the intermediate relays 500 ft. to the attack engine at the fire FL is 31 psi per 100 ft. 31 x 5 = 155 psi in TFL per relay Relay: 155 psi + 50 psi = 205 psi EP @ 1500 gpm 3 Engines and dual 4 in. supply lines


maintain the 1000 gpm fill rate objective with two fill lines deployed. It will pick up the draft engine s supply line and deploy two fill lines (3 inch or LDH). 9. Engine 224. a. In Station 22 s first due area, E-224 will always be the first unit out on structural fires. b. Hydrant Areas Engine 224 will lay from a hydrant to 8


Formula Method: FL= CQ2 L FL= Friction loss in psi C= Coefficient from a predetermined chart Q= Quantity GPM divided by 100 L= Length length of hose divided by 100 Pump Discharge Pressure= Nozzle Pressure+ Friction Loss Coefficients: 1 ¾ - 15.5 2 ½ - 2 3 - 8 5 - 08 Nozzle Pressures:

Access and Water Supply: Fire Flow Formulas: Part 3

1950s after a series of fire studies in enclosed spaces. The ISU Ideal Rate of Flow formula is: Required fire flow (gallons per minute (gpm)) = V ÷ 100. V = the volume of the space that is on fire. For example, an IC arrives at a burning noncombustible mercantile occupancy that measures 50 feet by

Calculations/Design Procedures Basic Fire Protection

required from the AFFF unit would be (60 gpm) x (4) = 240 gpm. The calculations dictate a unit size of not less than 240-gallon capacity. A 300-gallon capacity unit is to be supplied. The unit will provide a maximum flow rate of 300 gpm. A review of the fire extinguishing capabilities of the system vs. the platform hazards indicates: Max. Area

Every Pump Operator s Basic Equation

the opening. the formula for determining the gpm flow from a smooth bore nozzle is as follows: 29.72D2√P (D = nozzle diameter; √P = square root of pressure) For example, a one-inch smooth bore tip will have a dis-charge of 210 gpm: 29.72 × 12 × 7.07 = 210 gpm. FOG NOZZLES Many fire departments have chosen to place combination


850 gpm at 128 psig. From Figure 3, we see that at 750 gpm the friction and entrance loss would be 4.7 feet of water, and at 875 gpm it would be 6.5 feet; so we can estimate that at 850 gpm the loss would be 6.0 feet. We add this to the 8 foot lift to get a total (dynamic) lift of 14.0 feet and divide by 2.31 to get 6.06 psi vacuum:


Mar 30, 2006 pressure. (Example: 1,000 GPM pumper, 2,000 GPM pumper) 1.2 Stages - a pump with one impeller is a one-stage pump and a pump with two impellers is a two-stage pump. A two-stage pump can be thought of as two separate pumps built into a single casing. The FDNY uses 2-stage pumpers and 3-stage pumpers (high-pressure).


distance and through any kind of restriction. Following is the formula for friction loss (FL) in a 2 ½ inch fire hose: FL = 2Q2 + Q where: Q = GPM/100 Based on the information given above, what is the friction loss of a 2 ½ inch hose when the gallons per minute (GPM) is 185? * a. 8.7 b. 15.5 c. 9.3 d. 10.2

How to Calculate Rated Capacity of a Fire Hydrant with a Diffuser

To calculate the gallons per minute (GPM) or predicted flow of a fire hydrant, we will use both 2 1/2 sides of a fire hydrant. In order to calculate the NFPA or AWWA rated capacity, you will need to take three measurements before and during your flow test: Static Pressure Residual Pressure Gallons Per Minute

Student Activity Worksheet - Rumpke

Version 2 1 F.L.A.M.E.; Fire Logistics and Math Education Student Activity Worksheet Please complete this worksheet after the presentation. Problem # 1 Calculating Friction Loss

Assessment of Water Requirement and Calculation of Fire Flow

Jun 02, 2014 The value of Ci should not be less than 500 gpm (1893 L/min) nor greater than 8000 gpm (30,280 L/min) for Construction classes 1 and 2, and 6000 gpm (22,710 L/min) forConstruction classes 3, 4, 5, and 6, or any single, one-story building, Regardless of construction. Occupancy Factor.


Academy (NFA) formula: gpm=Length x Width 3 The required fire flow may be reduced by 50 percent if an automatic fire sprinkler system is present. C. Water supplies may be established by: 1. Booster tank operations 2. Supply lines 3. Tanker shuttle 4. Dump tank 5. Other available water sources

National Fire Equipment Ltd. Theoretical Friction Interior

Formula for Friction Loss: FL = CQ² L FL = Friction Loss in psi Q = Flow rate in hundreds of GPM C = Friction Loss coefficient L = Hose length in hundreds of feet Hose Diameter and Type (Inches) Coefficient Hose Diameter and Type (Inches) Coefficient ¾ booster 1,100 3 with 2 ½ couplings 0.8 1 booster 150 3 ½ 0.34


fire protection engineer with SFPE, compared firefighting flow-rates derived from various international research. As an example, according to the NFA flow formula, a fire involving a floor area of 1000 ft2 would require two hose-lines (primary and back-up) each flowing at least 165gpm (1000/3 = 333gpm shared between two hose-lines).

Foam Calculations - Pawling Fire

For hydrocarbon spills such as gasoline the formula is: Area X 0.1 gpm/ft 2 X 0.03 X 15 = foam concentrate needed For polar liquid spills such as ethanol the formula is: Area X 0.2 gpm/ft 2 X 0.06 X 15 = foam concentrate needed Now, the chances of a firefighter accurately calculating these formulas while at a


Superior firefighting performance on Class B fuel fires. Used as 3% concentrate on BOTH hydrocarbon fuels such as gasoline, fuel oil, etc., and polar solvent (water miscible) fuels such as methyl alcohol, acetone, MTBE, etc. Low viscosity formula enhances perform ance with in-line eductors, balanced pressure systems and built-in systems on