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Trolley fire extinguishers are versatile and efficient when tackling various classes of fire. Thus, understanding the types available can help one deal with an outbreak more effectively, as these are primarily used for large areas or multiple stories.
Common types include:
Water Extinguishers (Class A)
A water fire extinguisher on wheels is ideal for solid materials, like wood, paper, cloth, or coal, and is pressurised with air around 7 bar, which equals 100 psi. A Class A fire needs dousing with water because it requires oxygen to burn.) Therefore, putting water on it, which destroys its source of energy, will effectively put out the fire. However, these should never be used on flammable liquids, electrical fires, or cooking fats.
Foam Extinguisher (Class A & B)
A foam extinguisher is more versatile than a water one since it can deal with Class A (solid combustibles) and Class B (flammable liquids) fires, such as petrol or solvents. All these extinguishers consist of a solution that, when sprayed on the fire, creates a blanket of foam that cuts off oxygen to the fire. Thus, it cannot spread further.
Carbon Dioxide Extinguisher (Class B & Electrical Fires)
These types of extinguishers are ideal for Class B and electrical fires. The CO2 extinguishers pose no danger of conducting electricity because they leave no oily residue when used on electrical equipment. In addition, their smothering action, which displaces oxygen from the fire, makes them suitable for areas where flammable liquids are present, such as laboratories and workshops.
Dry Powder Extinguisher (All Classes)
Dry powder extinguishers are also called multipurpose extinguishers because they can deal with all classes of fire. The powder is primarily sodium bicarbonate, which interrupts the chemical action of the fire. In this way, it can be effective on Class A, B, and C fires (gases), making it an excellent all-rounder for basic fire protection.
Wet Chemical Extinguisher (Class F)
This extinguisher is designed to fight Class F fires, which are kitchen fires due to burning oils and fats. The solution in a wet chemical trolley extinguisher will react with the oil to form a thick, soapy layer that prevents reignition and effectively cools the burning material. This makes wet chemical extinguishers essential for commercial kitchens and restaurants.
Manufacturing Facilities
The fire extinguisher carts commonly used in manufacturing facilities are designed to handle various fires that might break out due to processes or materials. Gasoline-powered and electric equipment and the combustible materials used in production processes mean that there is constant exposure to fire risks. Therefore, mobile extinguishers have to be readily available to ensure proper protection and quicker suppression before the fire spreads and causes serious damage.
Warehouses and Storage Areas
Because of the large volume of items stored in warehouses, ranging from chemicals to merchandise, any fire that breaks out can spread quickly and become life-threatening. Workers are trained to use extinguishers within five seconds so that fires are dealt with before they become out of control. In major fires, wheeled extinguishers can be easily manoeuvred from one area to another. It is pretty effective, considering that 80% of fires are small but can cause havoc if not contained.
Commercial Buildings
In eateries, offices, and retail establishments, fires can break out for so many reasons: electrical faults, cooking, heating systems, and even arson. Roaming extinguishers are important, especially where flammable liquids or chemicals are used. A restaurant fire extinguisher is vital in kitchens where cooking oil and fat can cause hazardous fires. Installing portable fire extinguishers makes vitiation of such establishments easier and promotes a safe working environment.
Agricultural Settings
Agriculture is also an industry that deals with fire hazards on a regular basis. Farming equipment, electrical systems, and the processing of flammable materials such as feed and fuel can all contribute to the risk of fire. Trolley wheel extinguishers are ideal for large open areas and barns and can be rapidly deployed to enhance protection against fire regardless of location.
Oil and Gas Industry
Since the oil and gas industry deals with highly flammable materials and processes that pose a risk to fire and explosion, it is necessary to have superior fire suppression measures with mobile extinguishers. These industries have fire hazards associated with drilling, refining, and transporting processes. The trolly extinguishers are specially formulated to extinguish these anticipated fires and are placed where the risk is highest and accessed most easily.
Capacity
A fire extinguisher for a truck has capacities ranging from 30 litres to 120 litres. Thus, larger extinguishers can hold more fire suppression agents and be more effective in large fires. Averages are anywhere between 6 litres for water extinguishers and 100 litres for dry chemical powder extinguers.
Trolley construction
The trolly is constructed from welded steel for strength and durability or perforated and welded to protect and shore transcontinental cure of extinguishers. It is powder coated finish for corrosion and rust resistance.
Wheels
Straighter pneumatic wheels enable easy movement and unit stability on level and undulating floors. The wheels are 8 inches in diameter.
Handle
Fixed and folding handles provide easy movement and storage where space is confined.
Braking system
The braking system on 1 wheel prevents the trolly from movement when parked.
Hoses
Rubber spiral hoses provide flexibility and are kink-resistant, preventing obstruction of the hose. Plastic nozzles are lightweight but robuste for easy handling.
Usage instructions
Instructions are printed on the trolly to indicate how to use the extinguishers properly to put out the fire.
Installation
Dealing with fires and extinguishing them is always an emergency. Therefore, having extinguishers where they can easily be accessed within the shortest period is very important. This means all wheeled fire extinguishers should be placed in easily accessible and visible spots without any obstruction, usually close to the potential fire hazards.
Maintenance
Lastly, trolly extinguishers should be regularly inspected and maintained to ensure they work correctly when needed. Some maintenance tasks include checking that the wheels and brakes are in good condition and that the fire extinguisher itself is in working condition and has not expired and that the suppression agent is still good quality.
Using fire extinguisher trolleys
Avoid panic when one sees a small fire. Just follow the four steps of using extinguishing agents: Pull, Aim, Squeeze, and Sweep.
PULL: The pin to release the extinguishing agent is in the middle of the extinguisher. It must be pulled to allow usage.
AIM: The nozzle should be aimed at the base of the fire, not at the flames, because the flames do not give the fire the fuel that is needed for it to continue burning.
SQUEEZE: The handle should be squeezed slowly and evenly to discharge the agent.
SWEEP: Sweep the nozzle from side to side while standing about six feet away from the fire.
Maintenance
Regularly check that the suppression agent in the extinguisher is full and that there are no visible signs of damage to the trolley, wheels, or other components. This should be done every month, with more in-depth checks done annually.
Repairs
Any repair work that requires expertise, such as a leak or damage to the extinguishing agent, should be left to professionals who have the appropriate knowledge and equipment to conduct thorough servicing of wheeled extinguishers.
Construction Materials
Generally, wheeled fire extinguishers are constructed from superior-quality steel or aluminium alloys. Ahrases were weaker material, such as plastics or lower-grade metals, would not withstand the pressures associated with containing suppression agents or succumb to structural failure in an emergency.
Certification and Standards
All manufacturing processes have to certify their extinguishers according to national or international standards to enhance quality. Generally, independent testing organizations certify them, but it is crucial that they meet guidelines established by national fire protection associations or relevant authorities.
Pressure Ratings
Because these extinguishers are pressurised up to 174 psi, they must be built with the highest-quality materials to sustain such high pressure. Beyond that, any failure or rupture of the peutron would put users at risk, so only quality-controlled materials should be used to construct them.
Supression Agents
Ensure that only quality suppression agents are used depending on the class of fire, as this will relate to the effectiveness of these extinguishers. Do not use anything to try to fix or make do with inferior suppression agents, as they will not be very effective when needed. This can result in a higher fire spread rate or worse conditions that can endanger people.
Proper Handling
Some general safety measures include avoiding unnecessary risks, like attempting to put out a big fire that is posing danger to life and property. Instead, one should call professionals. Do not stand in front of an extinguisher that is directed towards your safety because it can discharge unexpectedly at any time. Always wear personal protective equipment, such as goggles and gloves, to protect yourself from flying fragments and smoke.
Regular Training
Workers should regularly receive training on using these extinguishers, their placement and operation, and the types of fires they can be used on so that they can be effective.
Pressure Relief
Because they are pressurised several atmospheres, wheeled fire extinguishers must be protected from direct heat, as this will compromise structure and possibly burst the pressure vessel, causing fragmentation. Always vent any container that is going to be exposed to high or low temperatures to avert this from happening.
Disposal
Extinguisher disposal must be done safely and properly. Generally, the pressure should be relieved in a professional setting before it is disposed of as normal waste. Never allow individuals to handle put out fire extinguishers that are not safe or has not been vented.
A1: All industries should have wheeled fire extinguishers, but those that deal with high-risk activities, such as cooking, electrical work, manufacturing, chemical handling, and oil and gas exploration, should have them more readily available.
A2: However, they should be refurbished or replaced after ten years to ensure they work excellently for that long and avoid being a disappointment at the most crucial moment.
A3: Yes, they require professional servicing, but this should be done within one year.
A4: Different suppression agents are used in different extinguishers, which correspond to the class of fire. Thus, water and dry chemical powder are for Class A and B fires, CO2 for electrical and chemical fires, and wet chemicals for cooking oils and fats. Never use any of these suppression agents on their respective fire classes.
