Fire Hose
What Is Fire Hose
A fire hose is a hose used to transport flame-retardant liquids such as high-pressure water or foam. A traditional fire hose is lined with rubber and wrapped with a linen braid on the outside. Advanced fire hoses are made of polymeric materials such as polyurethane. Both ends of the fire hose have metal connectors that can be connected to another hose to extend the distance or to a nozzle to increase the pressure of the liquid spray.
Advantages of Fire Hose
High Water Flow Rates: Fire Hose are designed to provide high-pressure water streams. The exact pressure is necessary to extinguish flame to prevent fire spread. As mentioned, a typical fire hose can withstand pressure up to 2 MPA.
Long-Reach Capabilities: Fire hoses can cover longer distances in emergencies. Some buildings, apartments, or marketplaces may require longer hoses from the outdoor hydrants. As a result, fire hoses are incredibly suitable for those who need to access fires in hard-to-hard areas or on the upper floors of buildings.
Flexibility And Versatility: Fire hoses are suitable in various situations and environments. As a result, they become versatile tools for firefighters.
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Fire Hose Rack1.Product introduction Fire hose racks are designed for use in controlling incipient fire by building occupant use. Used to provide an immediate and more efficient means of fire control. The...read more
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Different Types of Fire Hose
Fire Hose come in various types, each designed for specific applications and environments. Here are some of the main types:
▶Attack Hose: Also known as a front line or supply hose, it's used to directly combat fires. It is designed to be relatively light and flexible, allowing firefighters to maneuver it into position yet sturdy enough to withstand high pressures. They are typically smaller in diameter, around 1.5 to 3 inches.
▶Supply Hose: These are larger hoses, often ranging from 3.5 to 5 inches in diameter. Supply hoses move large volumes of water from hydrants or other water sources to the foreground or a fire engine's pump.
▶Forestry Hose: Designed for fighting wildfires, forestry hoses are lightweight, flexible, and designed to be carried long distances over rough and uneven terrain. They usually have a smaller diameter and are made of materials that can withstand outdoor conditions.
▶Booster Hose: A booster hose is a rubber-covered, thick-walled, flexible hose to fight small fires. It retains its round cross-section when not under pressure and is usually carried on a reel on the fire pumper rather than being stored flat. Booster hose comes in 0.75 inches (19mm) and 1 inch (25mm) nominal inside diameters and is often used for mop-up at a fire scene to extinguish hot spots.
▶Suction Hoses: These connect a fire engine to a water source, such as a fire hydrant. They are made to withstand vacuum pressures so they don't collapse when the pump draws water. Suction hoses are typically large in diameter, allowing more water to be drawn into the pump.
▶Relay And Supply Hoses: These are large-diameter hoses, usually 3.5 inches (89mm) or 5 inches (127mm), which are used to convey water over long distances, often from one hydrant to another or to a pumper located near the fire.
▶Occupant Use Hoses: These are found in cabinets in building hallways. They are typically 1.5 inches (38mm) in diameter and about 100 feet (30m) in length, intended for use by building occupants in the early stages of a fire.
Rubber And Thermoplastics Are The Default Materials Of Fire Hose Linings
Although natural rubber was the only choice possible for many years, several man-made rubbers have become commercially available since the 1940s. Presently, synthetic rubbers are exclusively used to form fire hose linings, although they are sometimes combined with plastics.
Styrene-butadiene rubber, or SBR, was the synthetic rubber commonly used in fire hoses until the early 1990s. Since then, ethylene propylene diene monomer (EPDM) has become the most common lining material and is favored for use in applications where water resistance is critical. Firefighting design professions found that EPDM was easier to manufacture, costs less, and contained several beneficial properties, including chemical resistance and a wider temperature range. EPDM is applied by an adhesive on the hose's inner jacket.
Thermoplastic liners, a mixture of synthetic rubber and plastics, are also applied by adhesive. These are slightly lighter-weight liners that are less prone to degradation. Their disadvantages are that they are more prone to high friction loss and may be at risk for faster burn-through. In addition, thermoplastic liners do not stretch as easily as EPDM liners, making them more likely to split or shred over time.
Gaining in popularity, extruded liners are manufactured by the application of the liner in a liquid state to the fabric, creating a seal with the inner jacket that is nearly inseparable. An advantage of this construction is that the liner offers a more hydraulically efficient waterway.
Importance of Fire Hose Size
When arriving on the scene of a fire, emergency crews have to make quick, on-the-spot decisions for approaching the situation. Arguably, one of the most crucial determinations that needs to be made is which hose lines are best suited for the circumstances. Fire severity, type of property, amount of required hose, and suppression tactics are all factors that influence what size and type of hose should be used. Choose correctly; the blaze has a better chance of being contained. Get it wrong; the situation can take a turn for the worse. Two essential hoses operated by firefighters are attack and supply hoses. In this article, the team highlights why hose size matters when approaching a fire.
Attack Lines
Attack hoses, are designed to tackle fires in their beginning stages and offer flexible approaches to different types of fires. The most common attack line sizes that fire departments deploy are 1.75 inches and 2.5 inches. Both sizes have pros and cons, depending on the situation at hand. Deciding to work with one format over the other can dictate the effectiveness of the initial suppression efforts. Smaller diameter hoses require much higher pressure to move lower volumes of water.
When working with the 1.75-inch hose, it is most useful for taking on residential and vehicle fires. This hose size is much lighter and more maneuverable than the 2.5-inch line. A more compact design makes it easier for firefighters to move the line through hallways, stairwells, and small rooms. Generally, this hose can be operated by two to three firefighters and can deliver water around 140 to 200 gallons per minute (gpm). So this is the desired hose to utilize when suppressing smaller fires. Being relatively easier to manage, 1.75-inch hoses tend to be a ‘catch-all' when first responding to a fire. If attempting to tackle larger blazes, the 2.5-inch attack hose should be fielded.
A 2.5-inch hose line is the best choice when responding to more significant commercial buildings and exterior fires. With the ability to deliver high volumes of water at 200 to 300 gpm, this hose can take on more of the fire load than the smaller 1.75-inch attack line. The 2.5-inch hose can be more challenging to control in smaller spaces and is commonly handled by three to four firefighters.
Supply Lines
Keeping the attack lines charged and operating at their best efficiency all depends on the supply hoses.can be found in sizes ranging from 3 to 6 inches in diameter.The bigger supply lines move high volumes of water from hydrants and fire engines to the attack lines. With the larger diameter, supply hoses can carry more water at lower pressures. Relocating supply lines can be difficult once the water begins flowing.
Pinching the supply line can spell serious trouble for an interior attack crew; here are ways to keep those lines kink-free.
Composed of two parts hydrogen and one part oxygen, water is one of Earth's basic elements. In the fire service, it's our main suppression tool as it is readily available in large amounts and very effective at cooling burning fuel.
Fire departments will secure their water supply from two basic sources: Static source or a pressurized source (hydrant). No matter what type of water supply is established, maintaining it is essential to fireground operations.
Fire Hose Kinking
There is one water-supply killer - kinks in the supply hose. Kinks in hose lines are the number-one cause of firefighters who succumb to the effects of fire due to rapid heat elevation and/or spread and size of fire.
We use water to not only suppress fire but also to protect ourselves from the effects of fire. This protection comes from consistent and adequate pressure and flow to the nozzle. This water supply must be maintained at all times so that no interruption takes place at the nozzle.
When there is a kink in the hose line, flow and pressure are reduced by almost 50 percent — this is a significant reduction. Having two or more kinks only make the reduction greater.
These kinks are the small dominos that line up one after another heading towards handicapping the fireground and the firefighters on the end of the hose line.
Kink-Free Hose Lay
Whenever a supply line is laid out from a hydrant to the pump, the firefighter at either the engine or the hydrant needs to take the time to flake out the hose so that no kinks will be formed when the hose is pressurized.
This can be accomplished by creating loops likened to a figure eight shape when the hose has to change direction, or by creating large curves as opposed to sharp bends.
Each hydrant can be different in terms of the pressure it can supply the engine; there is never a guarantee that the supply pressure form the hydrant will be enough to push out the hose so that kinks will be removed.
With small hose lines, the pump operator can increase the pump pressure in the line to help remove any small kinks that may have formed. But when it comes to the supply line, we are at the mercy of the hydrant.
To stop the dominos from lining up in this instance, train and exercise the muscle memory to hit the hydrant, lay the supply line, remove the kinks and then charge the line with water.
We have learned five primary components of a fire hose. These components deliver water or other extinguishing agents to the fire hazard site. The nozzle at the end of the hose disperses the water in a specific pattern. Some of these nozzles are typically narrow and capable of providing a high-pressure water stream. On the other hand, some nozzles create a spray pattern capable of covering a larger area. The firefighters can adjust this component based on the distance and severity of the fire.
The couplings connected to the fire hydrant typically start the process. After that, the inner tube carries the stream of water to the nozzle. In this case, multiple couplings may attach two or more fire hoses for longer distances. Finally, the water reaches the nozzle, and firefighters can adjust the volume and direction per the requirements.
The role of water pressure in a fire hose is immense. The critical factor of fire hose effectiveness is the pressure of water flowing through the hose. Firefighter hoses generally can withstand high pressure ranging from 150 psi (1MPa) to 300 psi (2Mpa). This pressure is typically generated by a pump that draws water from the hydrant to the fire hazard site.
Do Fire Hose Have To Be Inspected
The fire hose that is found inside buildings is typically referred to as an “Occupant Use Hose." The name stems from the fact that professional fire services will not use these hoses in the event of an emergency, but will instead use their own professional-grade hoses. Occupant Use Hoses were intended to be used by the building occupants, like an extinguisher, to fight early stage fires.
These types of fire hoses need to be inspected annually to ensure that they work in the case of an emergency. Fire hose inspection is important because they operate under pressure from water flow. If there is damage to the hose or it is not maintained properly, it could cause the fire hose to work improperly, or not at all, when needed. There are a few important factors that you need to be aware of when it comes to fire hose inspections.
Professional Inspections
Every year, or after each use, an Occupant Use Hose needs to be inspected by a professional. During the annual inspection, the fire hose needs to be physically inspected by removing it from the rack and unrolling it. The physical inspection of the fire hose includes checking the hose, couplings, and nozzle for debris, mildew, rotting, or damage by chemicals, burns, cuts, abrasions, or pests. Also, the nozzle controls need to be adjusted to make sure they function properly.
In addition to the annual inspection, the fire hose needs to be tested every three years, with the first time being 5 years after the manufacturing date. This test is referred to as the Hose Pressure Service Test. A fire safety professional can take care of this for you along with annual inspections.
Self-Inspections
In between annual inspections, a visual inspection should be done by someone within the facility. This can be done at the same time as the monthly fire extinguisher inspection, or whatever schedule works best for the facility. During a visual inspection, look for cracks, vandalism, fraying, and any broken couplings. If any damage is found, contact your fire safety professional for help.
How to Use Fire Hose for Fire Safety | Step-by-Step Guide
Introduction:
Fire is a common and deadly hazard that can occur at any time, anywhere. It can cause significant property damage and loss of life. Therefore, it is essential to take adequate measures to prevent fire and to know how to deal with it in case it does occur. One of the most effective ways to combat fire is by using fire hoses. In this article, we will discuss how to use fire hoses for fire safety in a step-by-step guide.
Step 1: Understand the Different Types of Fire Hose
There are different types of fire hoses available, each designed for specific purposes. The two most common types of fire hoses are the attack hose and the supply hose. Attack hoses are used to direct water or other extinguishing agents to the fire’s base. Supply hoses are used to transport water from the source to the attack hose. The attack hose is usually smaller in diameter than the supply hose, and it is more flexible, making it easier to maneuver.
Step 2: Choose the Right Hose for the Job
Before using a fire hose, it is essential to choose the right hose for the job. This means considering the type of fire, the size of the fire, and the environment in which the fire is burning. For example, if the fire is in a high-rise building, a smaller diameter hose may be more appropriate because it is easier to maneuver in tight spaces.
Step 3: Inspect the Fire Hose
Before using the fire hose, it is essential to inspect it for any signs of damage or wear and tear. Check the hose for cuts, cracks, and holes, and ensure that all fittings are secure. Also, check the nozzle to ensure that it is functioning correctly and is not clogged.
Step 4: Connect the Fire Hose
Once you have chosen the right hose and inspected it, the next step is to connect it. Connect the supply hose to the water source, and connect the attack hose to the nozzle. Make sure that all connections are secure and tight.
Step 5: Position the Fire Hose
Position the fire hose near the fire but out of harm’s way. Make sure that the hose is not kinked or twisted, as this can restrict the water flow.
Step 6: Turn on the Water
Before turning on the water, ensure that everyone is clear of the area. Then, slowly turn on the water, allowing it to build up pressure before fully opening the valve.
Step 7: Use the Fire Hose
Direct the nozzle towards the base of the fire and begin spraying water. Use sweeping motions to cover the entire area of the fire. Be sure to keep the nozzle moving to prevent the water from pooling in one area.
Step 8: Monitor The Fire
Monitor the fire as you use the fire hose. Ensure that the fire is completely extinguished before turning off the water.
It's important to understand the proper care for fire hoses or else you may be very well cutting down on the lifespan of the product(s) you are investing in.
Taking good care of your fire hoses can go a long way in increasing the years you get out of each hose. Taking care of a fire hose the “prescribed" way can lead to a useful life of 10–20 years. More vigorous use will cut down on the lifespan of course, but good fire hose care can still go a long way in keeping your hoses working at maximum efficiency for a longer length of time.
Care And Maintenance
Inspect the hose for wear or damage after each use. If you see dirt, you can wash the hose with warm soapy water and a scrub brush, or even simply flush the hose with water.
Roll and store the hose out of the sun and in a protected area. Too much sun exposure can damage the hose and make it age faster.
Definitely keep hoses rolled up in the offseason because animals such as rodents and vermin can cause damages. Also, rolled-up hoses help avoid accidents.
Let hoses dry, at least a little bit. If the hose is 100 percent polyester, it's not necessary for the hose to be completely dry because polyester isn't prone to gathering mold or mildew, which all modern hose is treated to resist. Drying is especially important if the hose is being prepped for seasonal storage, or if the hose will be stored in freezing conditions.
Store rolled hoses in a secure, flat area.
Make sure hoses are always in an area you can quickly access, just in case there is an emergency.
Rotate the positions of your hoses relative to other hoses in the hose lay to lengthen the life of the hose. It's a similar idea to rotating the tires on your vehicles.
Precautions
Use high pressure washers because the lining can separate from the fabric. You can use moderate water pressure to clean the hose.
Store the hose in a container as hoses need to breathe. That includes the off-season.
Store near heat sources in the winter or off-seasons.
Drag hoses. Abrasion and snagging from dragging hoses over rough terrain is one of the top reasons hoses wear out quickly. Woven jacketed hoses (single & double jacket) are particularly prone to this as opposed to rubber covered, lay-flat fire hoses.
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