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47 Cards in this Set
- Front
- Back
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Hose Classifications |
• Attack line • Supply line |
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Attack Hose |
• Transports water or other agents, at increased pressure, from: - Pump equipped apparatus to a nozzle. - Pump-equipped apparatus to a FDC. - A bldg standpipe to the point of fire attack. • HFD Def: Hose designed for trained fire fighters to combat fires beyond the incipient stage, & to convey water to fire appliances and equipment. |
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Most Common Types of Hose Construction |
• Single jacketed • Double jacketed • Rubber single jacketed • Hard rubber, or plastic non-collapsible. |
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NFPA 1961 |
Standard on Fire Hose |
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NFPA 1901 |
Standard for Automotive Fire Apparatus |
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Soft Sleeve Hose |
• Minimum of 15' long, has two female couplings and used to connect the main pumper intake to the hydrant. Incorrectly referred to as "Soft suction". |
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Hard Suction Hose |
Generally constructed in 10' lengths, & designed for drafting from static water supply. Normally available in sizes from 2 &1/2" to 6" in diameter. |
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NFPA 1963 |
Standard on Fire Hose Connections |
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Couplings |
• normally made of various percentages of brass, aluminum or magnesium. |
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Coupling Categories |
• CAST- Very weak & only found on occupant-use fire hose. Often crack if hose reattachment is attempted. • Extruded- Made of aluminum/aluminum alloy, allowing for light weight & high strength. • Drop Forged- Made of brass or other malleable metal, & are strongest & most expensive of the 3 types. |
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Coupling Types |
Threaded- One of the oldest designs, involves casting or machining of a spiral thread. Non-threaded- Connected with locks or cams, they have no distinct male or female couplings. Also known as Stortz or sexless couplings. |
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Female Couplings |
• Lugs located on the swivel • Coupling is considered two pieces because of the shank & swivel combination. |
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3 Types of Coupling Lugs |
• Rocker lug • Recessed lug • Pin lug |
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Quarter Turn Coupling |
Non-threaded coupling with two hook-like lugs that slip over a raised lip or ring on the opposite. Rotates 90 degrees to lock. |
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2 Types of Sexless Couplings |
1. Quarter turn 2. Stortz |
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NFPA 1962 |
Standard on Fire Hose Inspections. |
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Wye |
Jose appliance with one female inlet, & multiple male outlets usually smaller than the inlet. Outlets are usually gated, and use ball valves. Most common has a 2.5" inlet divided into two 1.5" outlets. |
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Siamese |
Hose appliance used to combine 2 or more hose lines into 1. It has multiple female inlets, & a single male outlet. Ex: FDC, ladder pipe cnx. |
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Adapter |
Device for connecting hose couplings with dissimilar threads but same diameter. |
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Water Thief |
Any of a variety of appliance w/one 2.5" female inlet or larger, & three gated outlets; usually two 1.5" outlets, & one 2.5" outlet. Smaller outlets "steal" from the main line. |
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Fitting |
Device that facilitates the connection of hose lines to provide an uninterrupted flow of extinguishing agent. |
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Valve Devices |
Allow the number of hose lines operating on the fire ground to be increased or decreased. Ex: Wye, Siamese, Water Thief. |
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LDH Appliances |
Used when a large volume of water is needed near the end of the main supply line. Typically consists of one large inlet, & three 2.5" valve-controlled male outlets. |
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Three Types of Hose Clamps |
1. Screw down 2. Press down 3. Hydraulic. |
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Hose Clamp Rules |
• Apply at least 20' behind apparatus. • Apply approximately 5' from coupling on the supply side. • Close/open slowly to avoid hammer. • Stand to one side of clamp to avoid handle snapping open. |
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Minimum Qty of Hose Carried on a Pumper (Engine) |
• Minimum 800' of 2.5" or larger supply line. • Minimum of 400' of 1.5", 1.75" or 2" attack line. |
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Three Supply Hose Loads |
1. Flat 2. Accordion 3. Horseshoe |
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Service Test |
Series of tests performed on apparatus & equipment in order to ensure operational readiness. Should be performed yearly or whenever a piece of equipment has undergone extensive repair. |
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NFPA 1962 |
Standard for the Inspection, Care, & Use of Fire Hose, Couplings, and Nozzles and the Service Testing of Fire Hose. |
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Lugs |
• Located on the shank of the male coupling, & on the swivel of the female. • Higbee indicators are cut into these to identify by touch or sight. |
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Braided Reinforcement |
Hose reinforcement consisting of one or more layers of interlaced, spiraled strands of yarn or wire with a layer of rubber between each braid. |
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LDH (HFD definition) |
A hose of 3.5" or larger size. |
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Operating Pressure |
Highest pressure a hose should be used in regular operations. |
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Service Test Pressure |
Pressure equal to approximately 110% of operating pressure. • Testing shall be done by department personnel before new hose is assigned to a company, or when hose has been repaired & returned to a company. |
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Proof Test Pressure |
Pressure equal to at least 2x the service test pressure. • Shall be performed only under controlled lab conditions by the hose manufacturer, designated agent or manufacturer approved testing facility. • Shall never be performed by department personnel. |
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Burst Test Pressure |
Pressure equal to 3x the service test pressure. |
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Kink Test Pressure |
Pressure equal to 1.5x the service test pressure. |
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Service Test |
Hydrostatic test conducted by users on all in-service hoses to determine suitability for continued service. |
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Supply Hose |
Hose designed for use at operating pressure not to exceed 185 psi to move water between a pressurized source & a pump supplying attack lines. |
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Slippage |
Hose pulls away from coupling. |
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Twisting |
Hose rotates left or right from coupling. |
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Coupling Service Test |
Couplings shall be inspected during each hose service test for: 1. Damaged threads 2. Corrosion 3. Slippage or twisting 4. Out-of-round 5. Swivel not rotating freely 6. Missing lugs 7. Loose external collar 8. Internal gaskets for fit, cracking & deterioration. 9. Other defects that may impair operation. |
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Reserve Hose Gaskets |
Hose size Reserve Gaskets 1" 4 1.5" 2 2.5" 9 3.5" 4 4" 5 Gaskets shall be replaced every two years during hose testing. |
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4" Service Test Pressure |
4" x 100' - Tested to 300 psi service test pressure. 4" x 25' - Tested to 300 psi also. • If not stenciled to service test pressure of 300 psi, hoses shall be used only for supply & not for discharge for apparatus to aerial equipt. or hand lines. • These hoses shall only be tested to 185 psi, and they shall be stenciled as "SUPPLY ONLY" near the female coupling. |
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Service Test Procedures |
• 1. Fire apparatus shall connect to a hydrant & supply water to the hose tester through one 2.5" hose line, at no more than 250 psi. • 2. Hose testers shall be used to generate additional pressures as needed. • 3. Maximum of 300' may be connected together & tested on each hose tester outlet. • 4. Personnel shall position themselves a minimum of 15' to the left of the hose when pressurized. • 5. Once hose tester builds up to necessary pressure, engine pressure may be throttled down to provide only hydrant pressure. • 6. Service test pressure shall be maintained for 5 min. • 7. When testing is complete, a form HFD-36 shall be completed & kept in station files for 10 years. |
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2.5" Hose Service Test |
• 2.5" hoses tested to 400 psi shall be stored in an engine company's right 2.5" bed (looking from the rear of the apparatus). • These 2.5" hoses shall be used to connect to the dry standpipe. |
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Bulldog Safe |
• Four AA batteries are required & shall be changed quarterly. • Exterior dimensions of the safe are 7.25" x 11" x 8". • Should the wrong code be entered 3 times, the safe will lock for 5 min, & a fail-safe key must be used to gain access. • If buttons are constantly illuminated blue, the batteries must be changed. • Bulldog Vault must be tested daily (code & fail-safe key). |
