Presentation on theme: "FIRE HOSE CONCEPTS During the early days of firefighting, the process of conveying water to a fire and applying it for extinguishment was a major problem."— Presentation transcript:
2FIRE HOSE CONCEPTSDuring the early days of firefighting, the process of conveying water to a fire and applying it for extinguishment was a major problem. The first known used hose was the large intestines of animals and the most known was of the yak. Over the years of civilization, crude types of fire hoses were developed yet there is no standard and satisfactory material produced until the 19th century. Until that time, the most famous means of transporting water to a fire was the passing of buckets of water down a line of organized fire brigades and citizens called the “Bucket Brigade”.
3FIRE HOSE CONCEPTSThrough the years of the rapidly changing needs for public safety, firefighting continues to deal with the current trends in combating destructive fires. Water, as one of the basic elements to support life and also the cheapest and most effective extinguishing agent continues to serve the fire department and also the people to prevent the spread of this destructive phenomenon.
4FIRE HOSE CONCEPTSFirefighters worldwide still put the fire out by moving water through a fire hose and directing its cooling effect to extinguish fire. A fire hose is absolutely essential to accomplishing our primary mission; TO SAVE SAVABLE LIVES AND PROPERTIES from the damage or total loss caused by fires.
5FIRE HOSE CONCEPTS What is a Fire Hose? Fire Hose, defined as: a specially constructed lined woven-jacketed hose designed to withstand the hazards of the fire scene;a type of flexible tube used by firefighters to carry water under pressure to a point where it is discharged; it must be water-tight, flexible and must have a durable covering or hose jacket (the outer covering of a hose and is also defined as a device clamped over a hose to contain water at a rupture point or to join damaged or dissimilar couplings); andIt is the most commonly used and abuse item it the fire service.
6FIRE HOSE COUPLINGSOne of the greatest dilemmas faced by the fire service during at the turn of the century was that each fire department used different sizes and threads of fire hoses and its fittings. There were once over 2,000 different fire hose threads and couplings and creating a major problem when different fire departments were to join conflagrations and major fire response. With this, it is impossible for some fire department pumpers to connect to fire hydrants and even other fire department pumpers. As a result, needless loss of lives and properties because water cannot be effectively carried or moved to the fire.
7FIRE HOSE COUPLINGSDuring the late 1800s, fire service administrations began to recognize the problems associated with each fire agency using couplings of different threads. In 1873, the International Association of Fire Engineers (now known as the International Association of Fire Chiefs) passed a resolution to set standards on fire hose screw threads. As early as 1898, the National Fire Protection Agency began drawing up thread specifications, not only on couplings but also in fire hoses, nozzles and accessories.
8FIRE HOSE COUPLINGSDeveloped dimensions for ten (10) coupling sizes (in inches) as to the year or its timeline:1925 – 2 ½ , 3, 3 ½ , 4 ½1935 – ¾ , 1, 1 ½1955 – 4, 5, 61956 – standards for gaskets and grooves of all ten sizes were adopted
9FIRE HOSE COUPLINGS Agencies that adopted the Ten (10) Standards: American Insurance AssociationAssociation of Factory Mutual Insurance CompaniesInternational Association of Fire ChiefsAmerican Water Works Association
10FIRE HOSE COUPLINGSThe thread used for the ten (10) sizes of threaded couplings is specified in NFPA Standards for Screw Threads and Gaskets for Fire Hose Connection wherein this standard specifies the number of threads per inch for each of the couplings. The standardized thread is called the “American National Fire Hose Connection Screw Thread” or NH or NST.
12FIRE HOSE COUPLINGS DIAMTER NUMBER OF THREADS INCHES MM 0.75 20 8 1.00 251.503892.50657 ½3.007763.50904.0010044.501155.001256.00150
13What is a Fire Hose Coupling? FIRE HOSE COUPLINGSWhat is a Fire Hose Coupling?Fire Hose Coupling or simply coupling is defined as the fitting permanently attached to the end of a hose, used to connect two (2) hoselines together or a hose to such devices as fire nozzles, fire appliance, discharge valves, or hydrants.
14FIRE HOSE COUPLINGSComponents of Fire Hose Couplings are generally alloys with varied percentages of:BrassAluminumMagnesium
15Types of Couplings Threaded Couplings Sexless Couplings Snap Couplings FIRE HOSE COUPLINGSTypes of CouplingsThreaded CouplingsSexless CouplingsSnap Couplings
16Threaded Coupling - a male and female coupling with a spiral thread FIRE HOSE COUPLINGSThreaded Coupling - a male and female coupling with a spiral thread
17Parts of a threaded coupling FIRE HOSE COUPLINGSParts of a threaded couplingShank (tail piece, bowl, shell) – serves as point of attachment to a hoseHigbee Cut – is a special type of thread design in which the beginning of the thread, which provides a positive connection between the first threads of opposing couplings, which tends to eliminate cross-threadingHigbee Indicator – marks where the higbee cut beginsLugs – aid for tightening or loosening of connectionsSwivel – permits connection of two section of hose without twisting the entire hose
18FIRE HOSE COUPLINGS Types of Lugs Pin Lugs – are lugs that resembles like small pegs or nipple-like structureRocker Lugs – most commonly found lugs in the fire serviceRecessed Lugs – are lugs that has shallow holes bored into the couplings
26HOSE CLASSIFICATIONS By Use Attack Hose – any hose between the attack pumper and the nozzle to which it supplies water; any hose that is used to directly control and extinguish fire.Relay/Supply Hose – is designed to move large volumes of water at low pressure and also has two category namely:Medium Diameter Hose (MDH) - from 2 ½ “ - to 3”-diameter hoseLarge Diameter Hose (LDH) - from 3 ½ “ to 6”diameter.
27HOSE CLASSIFICATIONSIntake Hose – is used to connect a fire department pumper or a portable pump to a nearby water source. This has two categories:Soft-Sleeve Hose (soft suction) – used to transfer from a pressurized water sourceHard Suction Hose (hard sleeve) – used primarily to draft from an open water sourceFire Extinguisher Hose – is used on large extinguisher units that may be stationary, wheeled or vehicle-mounted. This has two groups namely Conventional extinguisher hose (discharge pressure not more than 400 psi) and High-Pressure extinguisher hose (will withstand up to 1,250 psi)
28HOSE CLASSIFICATIONSBy ConstructionAnother way to classify hose is according to the way it is constructed. Hose construction standards specify a number of construction and performance characteristics wherein these standards require that, all fire hose move water reliably and efficiently, be maneuverable, be durable and resist-kinking.
29HOSE CLASSIFICATIONSFour basic hose classification based on the methods of its construction:Woven-Jacketed HoseRubber-Covered HoseBraided HoseWrapped Hose
30HOSE CLASSIFICATIONS Woven – Jacketed hose. - Used specifically for firefighting application where weight is a factor in maneuverability.This has two general types: Unlined hose – as the name implies, has no inner tube or liner. This type of hose tends its fabric when first charged to saturate and swell due to seepage but desirable. It has two classifications namely forestry hose and standpipe hose. Also called as single-jacketed hose.Lined hose – is far more widely used type of fire hose and consists of more woven-fabric seamless jackets into which a rubber tube has been inserted and vulcanized, which makes it leakproof and reduces friction when water flows at a high velocity. This hose can withstand higher internal pressures and more resistant to damage caused by abrasion. Also referred to as double-jacketed hose.
31HOSE CLASSIFICATIONSRubber-covered hose. As the term implies, has a rubberized cover that is mildew-proof and resists damage caused by abrasion and in contact with chemicals. Braided hose. Is used in the manufacture of booster hose and fire extinguisher hose. This hose can withstand high internal pressure. Wrapped hose. Primarily used in drafting or vacuum operations. It is wrapped by several layers of diagonally cut (bias-cut) fabric around an extruded rubber tube and rubber compound and copper wire coiled between layers are applied to prevent collapse.
32HOSE CLASSIFICATIONSTo better understand the relationship between the way a fire hose is constructed and used is shown in the table below:WOVEN-JACKETEDRUBBER-COVEREDBRAIDEDWRAPPEDAttackBoosterHard SuctionMDH Relay-SupplyExtinguisherLDH Relay-SupplySoft Sleeve
33HOSE DAMAGESFire hose is a tool that is subjected to many potential sources of damage during fire fighting. Like any other materials or objects, all are subject to wear-and-tear condition due to the nature of activity that fire fighters combat fires with the use of their tools and equipment.
34HOSE DAMAGES Different Types of Hose Damages and their prevention Mechanical DamageThermal DamageOrganic DamageChemical Damage
36HOSE DAMAGES Mechanical Damage - Are caused when an object contacts the hose along its length and cuts, abrades, tears or stresses the jacket and underlying materials and crushed or damaged couplings.Recommended Practices for PreventionAvoid laying or pulling hose over rough, sharp edges or objectsUse hose ramps or bridges to protect hose from vehicles running over itOpen and close nozzles, valves and hydrants slowly to prevent water hammer (force created by rapid deceleration of water under pressure)Change position of bends in hose when reloading hose on apparatusProvide chaffing blocks to prevent abrasion to hose when it vibrates near the pumpAvoid excessive pump pressure on hose lines
37HOSE DAMAGESThermal Damage. Is caused when exposure to excessive heat or cold which weakens the fabric layer, melts or freezes the rubber linings.Recommended Practices for PreventionProtect hose from exposure to excessive heat or fire when possibleDo not allow hoses to remain in any heated area after it is dryUse moderate temperature for drying. Warm Air or Air dry is better than hot airKeep the outside of the woven-jacketed fire hose dryRun water through hose that has not been used for some time to prolong its lifeAvoid contact in close proximity with vehicle exhaust systemsUse hose bed covers on apparatus to shield the hose from the sun
38HOSE DAMAGESOrganic Damage. This causes decay and consequent deterioration of the hose due a parasite called fungus or otherwise known as mold or mildew.Recommended Practices for PreventionRemove all wet woven-jacket hose from the apparatus after a fire and replace with dry hoseRemove, inspect, sweep and reload woven-jacket hose if it has not been unloaded from the apparatus during the period of 30 daysExercise woven-jacket hose every 30 days and run water through it every 90 days to prevent from drying and cracking of the rubber liningVentilate all areas where hose is keptCover hose beds with water repellent covers to keep loads dry during inclement weather
39HOSE DAMAGESChemical Damage. Is caused when hose is exposed to petroleum, oil, acids, alkali’s, paints and runoff water from a fire.Recommended Practices for PreventionScrub hose thoroughly and brush all traces of acid contacts with a solution of baking soda and water. Baking soda neutralizes acidsRemove hose periodically from the apparatus, wash with plain water, and dry it thoroughlyAvoid laying hoses in the curb or gutter where vehicles have been parked and might drop chemicals due to leakageDispose of hose properly if it has been exposed to hazardous materials and cannot be decontaminated
40PROPER CARE AND MAINTENANCE Three (3) methods of caring and maintaining fire hosesWashingStoringDrying
41PROPER CARE AND MAINTENANCE Washing Hose- Most laborious, time-consuming job that can be simplified by using devices or manually done by fire fighters. Use mild soap or detergent on the hoses and brush thoroughly with stiff -bristled brush to remove dust and dirt. Rinse the hose thoroughly.Machines / devices used on washing/rinsing/draining hose Cabinet-type hose washing machineJet Spray device
42PROPER CARE AND MAINTENANCE Storing Hose After the hose has been cleaned or dried, it should be rolled and stored in suitable hose racks, hose towers or improvised hose storage. The area must be kept clean and well- ventilated. If on hose beds, must be covered with water-repellent covers
43PROPER CARE AND MAINTENANCE Drying Hose This must be done according to manufacturers’ instructions and must be dried using warm air to avoid moisture on the rubber linings.
44HOSE APPLIANCE AND TOOLS A complete hose layout for fire fighting purposes includes one end of the fire hose attached to or submerged in a source of water and the other attached to a nozzle or similar discharge device.These devices are grouped into two:Hose AppliancesHose Tools
45HOSE APPLIANCE HOSE APPLIANCE Is any piece of hardware used in conjunction with the fire hose for the purpose of delivering waterKinds of Hose ApplianceValvesValve DevicesFittingsIntake Devices
47HOSE APPLIANCEValves. Controls the flow of water in hoselines, hydrants and at pumpers.Types and usageBall Valves. Used in pumper discharges and gated wyesGate Valves. Used to control the flow from a hydrantButterfly Valves. Used on large pump intakes.Clapper Valves. Used in Siamese appliance to allow one intake hose to be connected and charged before the addition of more hoses
48HOSE APPLIANCEValve Devices. Increase or decrease the number of hoselines operating at the fireground.Types of Valve DevicesWye Appliance. Divides a line of hose into two or more lines. Often gated so that water being fed up to into the hoselines may be controlled at the gate.Siamese Appliance. Wye and Siamese appliance are often confused because of their close resemblance. This appliance consists of two or more hoselines that are brought into one hoseline or device. This device is commonly used to overcome the problems caused by friction loss in hose lays to cover a long distance flow. Popular on LDHs.
49HOSE APPLIANCEWater Thief Appliance. This is a variation of the wye appliance. It is intended to be used on a 2 ½ - inch or larger hoseline, usually near the nozzle so that the hoselines may be used as desired from the layout.Large Diameter Hose Appliance. This type often necessitates the use of special appliances to distribute the water near the final destination of the hoseline. These devices are sometimes called portable hydrants, manifolds, phantom pumpers, or large diameter distributors.Hydrant Valves. These valves are used when a hose lay is made from the water-supply source to the fire scene.
50HOSE APPLIANCE Fittings Are used for connecting hoses of different sizes and thread types.Types of FittingsAdapter. A fitting for connecting hose couplings with dissimilar threads but with the same inside diameter.Ex: double male, double femaleReducer. This type of fitting is used to reduce a larger diameter coupling to a smaller coupling.Elbows. Changes the direction of flow.Hose Caps. Closes male couplings.Hose Plugs. Closes female couplings.
51HOSE TOOLS HOSE TOOLS These are used in conjunction with hose lines. Kinds of Hose ToolsHose Rollers. Prevents mechanical damage of hose when dragged over sharp surfaces such as roof edges and windowsills. This is secured with a C-clamp and rope.Spanners, Hydrant Kits, and Rubber Mallets. Spanners, tighten and loosens hose couplings; Hydrant Kits are combination of spanner and a pentagon-shaped wrench for opening hydrants; and Rubber Mallets is used to strike the lugs to tighten or loosen intake hose couplings.
52HOSE TOOLSHose Clamps. Stops the flow of water in a hoseline in order to prevent charging the hose during hose-lay operations; to allow replacement of burst sections without shutting down the supply line; to allow extension of hose line; and allow advancement of charged hoseline up stairs.Types of Hose ClampsScrew-DownPress-downHydraulic Press Hose Strap, Hose Chain, Hose Rope. One of the most useful tools to aid in carrying or handling charged hoselines is a hose strap, hose chain or hose rope. These devices used to carry and pull fire hose, but their primary value is to provide a secure means to handle pressurized hose when applying water, and secure hose in ladders and other fixed objects.
53HOSE TOOLSHose Ramps. Helps prevent injury to hose when vehicles cross it.Hose Jacket. When firefighting conditions are not possible to change a line when ruptured, this encloses the portion to prevent leakage of both pressure and water.Chaffing Block. Devices that used to protect fire hose where the hose is subjected to rubbing from vibrations from the intake hose or pumper vibrations
54SUPPLY HOSE LAYS SUPPLY HOSE LAYS Forward lay. A method often used when the water source is a hydrant and the pumper must stay in location.Reverse Lay. A method wherein the pumper must first go to the location so that a size up can be made before laying a supply line.Split Lay. Refers to any one of a number of ways to lay multiple supply lines.
55SPECIAL HOSE OPERATIONS These are special operations that are not done routinely but nevertheless, it is important to know.Connecting Hard-Suction HoseConnecting Soft-Sleeve HoseConnecting Hose to a Portable MonitorKinking Hose to Shut Down a Charged LineRetrieving a Charged “Wild-Line”Securing a Hoseline to a Ground LadderHoisting a HoselinePassing a Hoseline UpwardFor Rescue
56FIRE NOZZLESFire Nozzle or simply nozzle is defined as a device that directs water from the hose to the fire. It forms the water into a fire stream and controls the stream so that fire can be extinguished.Parts of a Nozzle Shutoff Valve provides a means of not only opening and closing the nozzle but a means to control the amount of flow of water through the tipTip is the component that forms the streams
58FIRE NOZZLES Kinds of Nozzles Solid Stream Nozzles. The oldest type of nozzle in the fire service and it can penetrate a mass of burning material when a fire is deep seated.Fog Nozzles. As to the name itself, produces a fire stream made up of small droplets of water that leave the tip in a spray or “fog” pattern.Exposure Nozzles. This is designed to protect a building or object from heat generated by a nearby building that produces a fan-shaped stream called “water curtain” approximately 35 feet wide and two stories high.Applicator Nozzles. This are designed to direct a water stream directly over the surface of a burning object.Master Stream Devices. Moves larger quantities or volume of water when such size and intensity of fire grows. This includes monitors, deluges, turret pipes and ladder pipes.
59FIRE STREAMSFire streams can be defined as a stream of water or other extinguishing agent after it leaves a fire hose and nozzle until it reaches a desired point.Fire streams intended to reduce high temperatures from a fire and provide protection to firefighters and to exposures through the following methods:Applying water or foam directly to the burning material to reduce its temperatureApplying water or foam over an open fire to reduce the temperature so that firefighters can advance handlines closer to effect extinguishmentReducing high atmospheric temperatureDispersing hot smoke and fire gases from a heated area by fire using fire streamCreating a water curtain to protect firefighters and property from heatCreating a barrier between a fuel and a fire by covering with a foam blanket
60FIRE STREAMS Extinguishing properties of water Cooling Effect Cooling EffectSmothering EffectExpansion Capability
61FIRE STREAMSSeveral Characteristics of Water that are extremely valuable for fire extinguishmentWater is readily available and inexpensiveWater has greater heat-absorbing capacity than any other common extinguishing agentsWater changing into steam requires a relatively large amount of heatThe greater the surface area of the water exposed, the more rapidly heat is absorbed
62FIRE STREAMS Water Fire Stream Patterns Water fire stream is identified by its size and type. The size refers to the volume of water flowing per minute.Classifications of Fire Streams as to its sizeLow-Volume Stream discharges less than 40 gpm (160 L/min) including those fed by booster nozzlesHandline Stream discharges from 40 to 350 gpm (160 to 1,400 L/min)Master Stream discharges from more than 350 grpm. This are also large-volume fire streams
63FIRE STREAMS Different Types of Streams Solid Stream is a fire stream produced from a fixed orifice. It has the ability to reach areas that other streams might not reach and minimizes the chance of steam burns to firefighters.Fog Stream is a fire stream composed of very fine water droplets. The design of most fog nozzles permits the adjustment of the fog tip to produce different fire stream patterns.Broken Stream is a steam of water that has been broken into coarsely divided drops.
64FIRE STREAMS Different Fire Stream Patterns For Defense For Offense O patternFor OffenseArrow Head Pattern / Inverse Arrow Head PatternBrushing Pattern or Sweeping PatternCross PatternT PatternI Pattern