Extinguishing burning electrical equipment under voltage is carried out using carbon dioxide, aerosol and powder fire extinguishers. It is necessary to ensure electrical safety (dielectric gloves, boots, etc.);
Extinguish the fuel in the hold with high-pressure MP, sprayed water, if necessary - with reinforced reinforced concrete, do not push fuel into hard-to-reach places;
Extinguish fuel in tanks by turning on steam extinguishing, supplying nitrogen (kerosene storage), flooding with water;
Extinguish fuel in the water around the vessel with fire nozzles, high-pressure explosives, mixing fuel and water by turning propellers, driving fuel away from the vessel with water jets, and removing the vessel from the dangerous area;
When extinguishing gasoline, kerosene, and varnishes, apply maximum foam in a short time;
Approach the source of fire as close as possible (using water curtain), but do not hit the jet point-blank, but direct the foam to the edge of the fire area and gradually cover the entire surface of the combustion zone with a layer of foam at least 20 cm thick;
In premises - apply foam to the upper part of the fire, to the ceiling, to the bulkheads;
When the OXT is turned on, depressurize it no earlier than after 30 minutes;
The duration of ventilation after extinguishing a fire should provide 15-20 volumes of the room;
When supplying water to extinguish a fire, remember the need to remove it and avoid reducing stability.
After extinguishing the fire, emergency rooms must be thoroughly inspected, ventilated, and drained. They must be constantly monitored (watch) in order to prevent re-ignition (which happens quite often).
Basic fire extinguishing techniques on ships
Extinguishing fire with water
For extinguishing, sea water is used, which is supplied by fire pumps through fire hoses and trunks to the source of the fire. The advantage of this extinguishing method is that intake water is the cheapest fire extinguisher and its supplies are almost unlimited. The disadvantages include: the inability to extinguish live electrical equipment, a possible decrease in the stability of the vessel and damage to equipment.
Rules for laying hoses:
Choosing the most convenient and most convenient route to the fire site
a short path, leaving some reserve in the hose line for the possibility of maneuvering the barrel;
Do not allow the sleeves to twist or bend, as this may lead to a loss of water supply and damage to the hoses;
Do not lay hoses over burning, smoldering materials or sharp objects;
Sleeves laid from the upper deck to the superstructure must be tied to rails or racks, otherwise the sleeve will pull the person working with the barrel down;
Apply water to the hose only after the barrel is picked up;
Do not drag the hoses along the deck to avoid damage;
Extend additional hoses only after stopping the supply of water and from the end where the trunk is connected.
To work with a fire nozzle, a crew of two people is assigned:
The first number (the gunner) rolls out the sleeves from the horn, attaches the barrel and works with the barrel;
The second one (the contractor) helps lay the hose line, checks the connection, regulates the amount of water, helps
grow a hose line.
If the barrel operates under a pressure of more than 6 kg/cm 2, then it will help
Another person is assigned to the trunk operator. The calculation in this case will be
consist of three people.
Work with trunks can be done from three positions: standing, kneeling, lying down. To work in a standing position, the left leg should be placed forward and slightly bent at the knee, the weight of the body should be evenly distributed on both legs. Right hand hold by the sleeve near the connecting nut, with your left hand by the barrel in the place of the braid. Adjust the water supply with your left hand.
To work in a kneeling position, you need to stand on your right knee. Place your left bent leg forward to the full foot. With your right hand, press the sleeve to your belt, rest your left elbow on your left knee and hold the trunk with your hand.
To work in a prone position, you need to lie on your stomach, leaning on your elbows, with your legs spread apart. Hold the barrel as if in a standing position, moving it slightly forward.
Rules for extinguishing fires with water jets:
Approach the fire site as close as possible;
Direct the jet towards the burning surface towards the spreading fire, and not towards the smoke and flames;
Do not leave fires along the path;
Do not direct the compact jet at people, as this may cause injury;
Do not direct the water jet at live electrical equipment;
Do not spray water into hatches and doors of large rooms if the source of the fire is not visible;
When extinguishing a liquid fuel fire, use only a spray jet;
When extinguishing fire on vertical surfaces, direct a stream of water to the upper part of the burning surface so that the water flowing down will facilitate extinguishing;
If a fire is extinguished with foam, do not direct the water jet at the foam layer so as not to destroy it.
When using water jets to extinguish internal ship fires, accumulation of water on decks must not be allowed, because this reduces the stability of the vessel. Water must be transferred to the lower room and pumped overboard.
Fire extinguishing with foam
Foam is a colloidal system of liquid bubbles filled with gas. The film of bubbles contains a solution of surfactants (surfactants) in water with various stabilizing additions.
Foams are one of the most common fire extinguishing agents.
The fire extinguishing ability of foam is determined, as previously noted, by its properties: expansion rate, durability and insulating ability.
The insulating ability of foam is to prevent the evaporation of flammable substances and the penetration of vapors, gases and various radiations through the layer of foam. It depends on the durability, viscosity and
dispersion.
Foams are used to extinguish almost all types of flammable substances. Excluding explosives and those that interact with water. It is prohibited to use foam based on chemical compounds to extinguish live electrical equipment. For air-mechanical foams obtained from fresh water solutions, the limits for extinguishing electrical equipment are usually 380-500 V.
When extinguishing fires, foam from the generator should be fed into
a room with convective air flow. The supply of foam into a stream of smoke and fire leads to the complete destruction of the foam without the effect of extinguishing the fire. Do not use foam and water at the same time, because water destroys the foam and thereby creates conditions for the spread of fire where it has already been extinguished. The simultaneous use of foams of different expansion ratios does not worsen extinguishing conditions. The greatest effect when extinguishing large fires is achieved by organizing foam attacks and the massive use of fire extinguishing agents.
After extinguishing a fire with high- and medium-expansion foam, smoldering of fibrous materials and other flammable substances in hard-to-reach places may continue under its layer, so when inspecting the premises, scouts must be prepared to extinguish these fires.
Fire extinguishing with carbon dioxide
Carbon dioxide fire extinguishers are primarily intended for
for extinguishing fires of electrical equipment under voltage. They can also be used to extinguish incipient fires of solid and liquid substances. Substances that burn without oxygen (pyroxylin, film, celluloid, etc.), as well as those that can burn in carbon dioxide (magnesium-aluminum alloys, etc.) cannot be extinguished with carbon dioxide.
Carbon dioxide fire extinguishers, as a rule, are a cylinder (reservoir) containing carbon dioxide under pressure. Charging of such fire extinguishers is carried out only at special stations. When leaving the cylinder under the pressure of its own vapors, carbon dioxide partially transforms into a gaseous state, partially into a solid state - flakes similar to snow, which then also evaporates. Combustion stops due to a decrease in the oxygen concentration in
the source of the fire, as well as due to cooling and impact
streams and snow.
In the event of a fire, you must take the fire extinguisher by the handle (if portable) and bring it to the fire site. With your right hand, turn the bell in the direction of the fire and turn the handwheel to the left to open the shut-off valve all the way. The fire extinguisher must be kept in a vertical position, because In a horizontal position of the cylinder, snow formation worsens.
Fire extinguishers work for a short time and produce a short stream, therefore, when using them, you need to get as close as possible to the source of the fire and direct the stream at the source of the fire.
When extinguishing burning liquids, the jet from the nozzle must be directed at a small angle to the surface of the liquid so as not to splash it. Carbon dioxide extinguishes fire on the surface of a burning material, so when extinguishing wooden objects, rags, etc. After extinguishing the fire, it is necessary to carefully check the location of the fire and, if necessary, extinguish the remaining fires.
The room where carbon dioxide fire extinguishers were used should be very well ventilated, and during use
monitor the condition of personnel in the compartment.
Extinguishing fires with volatile liquids
Easily evaporating liquids - freons are intended for extinguishing:
Liquid and solid flammable materials, except smoldering ones;
Electrical equipment de-energized or energized;
Combustible gases (hydrogen, acetylene, hydrocarbon).
Freons are classified as fire extinguishing agents that chemically inhibit combustion reactions. They are, under normal conditions, easily evaporating liquids or gases. Stop burning with help. Freon gas is based on a chemical principle: intermediate products (atoms and radicals) formed during the combustion process, which are active centers of oxidation reactions, sharply inhibit their activity when exposed to vapors of freon gases evaporating at the source of the fire. Bromine atoms in the composition of refrigerants give their vapors high fire extinguishing efficiency, fluorine atoms increase
improve thermal resistance.
Advantages of refrigerants: they have good wetting ability, are not electrically conductive, practically do not dissolve in water, have low temperature freezing of vapors.
The disadvantages of refrigerants include their toxicity, corrosiveness, ability to burn the skin, narcotic effect and relatively high cost.
At a concentration of about 50 mg/l, a narcotic is detected
the effect of freon, which first manifests itself in depression of nervous activity, in slight irritation of the mucous membranes of the eyes and upper respiratory tract. In some cases, trembling of the whole body is observed, a passive state occurs, and coordination of movement is impaired. Breathing becomes shallow, the person does not respond to sound signals, then a narcotic sleep occurs. The skin and mucous membranes turn pale, and bluish edema appears. At high concentrations, death is possible. That's why, Before turning on the reinforced concrete safety system, it is imperative to remove personnel from the emergency room. The products of thermal decomposition of freon (phosgene, bromphosgene, etc.) also pose a certain danger, but extinguishing, as a rule, ends before dangerous concentrations of toxic substances are formed.
Extinguishing fires with freon is based on the volumetric method. It is necessary to create an environment in the emergency compartment in which further combustion will be impossible. This condition is satisfied when
the concentration of freon vapor in the compartment is 215 mg/m 3 .
The required concentration of refrigerant vapor in the room volume can be
may not be created and the required extinguishing effect will not be obtained if:
freon will be supplied to the compartment less than the calculated norm;
due to the low temperature in the compartment, part of the freon will not be able to transform into a gaseous state and will condense on ship structures (at an average temperature in the compartment of 20ºC, the probability of extinguishing a fire is 50%.
due to poor sealing, part of the refrigerant will be lost from the compartment;
The main characteristics of some refrigerants are given in table. 22.
The brand of refrigerant is determined by the composition of its constituent elements. According to the international classification, it corresponds to the number of carbon, fluorine, chlorine and bromine atoms, i.e. tetrafluorodibromoethane C 2 F 4 Br 2 means: freon 2402, where zero is the number of chlorine atoms.
According to the classification adopted in our country, the grade of refrigerant corresponds to the presence of carbon atoms without one (C-1), hydrogen - one atom more (H+1), fluorine and bromine. Thus, C 2 F 4 Br 2 means freon 114B2, where bromine is indicated by a letter with an index corresponding to
corresponding to the number of its atoms.
It should be borne in mind that at temperatures of about 500ºC, the toxicity of freon vapors increases sharply due to decomposition into individual components.
Volumetric chemical extinguishing systems
fires (SRC)
designed to protect engine and machine-boiler rooms, compartments, auxiliary mechanisms, pitch stabilizers, power plants, reloading and pumping rooms and a number of other premises. All systems are carried out in two types:
Group protection, when the system protects several premises simultaneously. As a rule, the SRC system in the premises of the power plant is constructed according to this type;
Individual protection, when the system protects one specific room.
Table 22
Main characteristics of some refrigerants
|
Name | ||||||
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Tradename | ||||||
|
Molecular weight | ||||||
|
Temperature boiling point, ºС | ||||||
|
Vapor pressure, MPa | ||||||
|
Liquid density, kg/m 3 | ||||||
|
Fire extinguishing concentration, % volume | ||||||
|
Comparative mass characteristics | ||||||
|
Comparative cost characteristics |
Concrete reinforced concrete systems include containers (reservoirs) or fire extinguishers with freon, pyrodrives for supplying fire extinguishing agent to
premises. Sprayers, alarm devices, devices for charging fire extinguishers and containers, control and measuring equipment. Schematic diagram volumetric chemical extinguishing system is shown in Fig. 25.
The system of the first type (group protection), in addition, has shut-off valves with a pneumatic drive, an electric pneumatic distributor (EPR), cylinders with a supply of compressed air for controlling valves and, as a rule, remote control systems for the automatic control system of reinforced reinforced concrete stations.
Automatic control system consoles allow you to perform the following operations:
Remote opening and closing of distribution valves
lords of various stations of the reinforced reinforced concrete system;
Remote sequential activation of containers or fire extinguishers selected to extinguish a fire;
Monitoring the integrity of fire extinguisher squib coils with electrical control circuits;
Monitoring the position of distribution valves;
Control of the flow of fire extinguishing liquid into the premises.
In general, a reinforced reinforced concrete station consists of the following units:
Reservoir with refrigerant (maybe two or more);
An air cylinder (maybe two or more) with a pressure of up to 20 MPa;
Reducer to reduce pressure to 1 MPa;
Pipelines with fittings;
Sound and light signaling about the start of the system.
The refrigerant reserves at the station should ensure that it is turned on twice if necessary.
Safety regulations:
When freon enters the compartment, it is necessary to immediately
remove all personnel from the compartment, primarily the personnel of the lower rooms (freon vapor is 9 times heavier than air). Ventilate the premises until the freon is completely removed.
When working in a room contaminated with refrigerant vapors, it is necessary to use self-contained breathing apparatus.
If freon gets on your clothes, you must take a shower and put on clean underwear.
Signs of poisoning include dizziness, headache,
nausea - consult a doctor.
When working with freon, smoking is prohibited (the self-ignition temperature of freon is 695ºC). A smoker can inhale the decay products of the refrigerant along with cigarette smoke and get severe poisoning.
Fire extinguishing with steam
Water vapor has a fire extinguishing concentration of 35%. The steam density is low (0.598 kg/m3), and therefore it is used in rooms with a volume of up to 5000 m3. Water vapor has a weak heat-absorbing ability, so its cooling effect is small, which can lead to repeated fires. The disadvantages of steam extinguishing include the fact that personnel must be removed
from the emergency room, because This can lead to burns from the extinguishing agent - steam. As a rule, steam is used to extinguish fuel tanks. When extinguishing with steam, special attention should be paid to the tightness of the emergency room.
The ships are equipped with various portable, transportable and stationary fire extinguishing systems with various fire extinguishing agents. But the degree of effectiveness of their use significantly depends on the correct and timely actions of personnel, determined, ultimately, by their knowledge.
Arising suddenly. It involves not only material damage, but also a risk to life and health. In this case, it is important to prepare for it in advance.
Having a fire extinguisher nearby and knowing how to use it correctly will help prevent small fires from spreading and avoid larger ones. negative consequences. Fire extinguishers have their own qualifications depending on the fire extinguishing agent used - foam, powder, CO2.
Let's consider what features exist in the use of each type of fire extinguishing device, and how to properly and quickly cope with a fire using them.
Foam fire extinguishers: how to use them correctly?
This device must not be used in situations where fire occurs in electrical installations or live wires. This is due to the fact that the composition of the foam includes water, and water and electricity are a very dangerous combination. A foam fire extinguisher has a nozzle and a special gas cylinder. It is this that gives the pressure, under the influence of which the foaming agent rises upward from the cylinder. There, when interacting with air, foam is formed.
Step-by-step instructions for using a fire extinguisher
- Break the seal or pull out the pin. It protects the device from accidental operation.
- Direct the socket (nozzle) towards the fire
- Press or turn the lever (depending on type)
- When the fire is extinguished, the lever should be returned to its original position.
To use a fire extinguisher safely and effectively, it must be repaired and recharged only in special places (stations). It is also important to send the device for regular checks. The results are recorded in the log book. The service life of fire extinguishers is 10 years, subject to inspection and recharging schedules (annually).
Be sure to check the license or certificates that authorize the organization to service such devices. For a working fire extinguisher, the check and seal should not be damaged.
Instructions for using a powder type fire extinguisher
The actuation scheme of this device is exactly the same as that of the foam type. The first step is to get rid of the fixative - blocker (checks or seals). Next, press a button or use a lever. They are located on the top of the body. Some models have a valve for starting the gas-generating device.
In types with gas cylinder Before starting to extinguish the flame, you need to wait a few seconds. This time is needed for the gas to react with the powder layer of the fire extinguishing agent in the cylinder body. The powder is fluffed up and collected in the upper part of the container. Pointing the fire extinguisher barrel at the fire, pull the special trigger.
- When extinguishing fire outdoors, use the windward side
- When extinguishing or extinguishing flammable materials, first point the barrel at the leading edge of the fire, i.e. on the burning surface, and not on the fire itself.
- Start eliminating the leaking burning liquid from the top.
- If a wall or any vertical surface is on fire, you need to extinguish it from below and move up.
- If possible, use multiple fire extinguishers at the same time. This will speed up.
Even if you have finally dealt with the fire, never lose your vigilance and do not turn your back on it. It is necessary to monitor the extinguished fire site for some time, as there is a possibility of a re-ignition.
After using a fire extinguisher, be sure to recharge it. This type should be checked every year. It should be sent for recharging (even if you have not used it) every 5 years of storage.
Instructions for using a carbon dioxide type fire extinguisher
Such devices are characterized by the fact that fire extinguishing agents they are invariably under pressure from their own vapors or compressed gas. They are universal. They can be used in almost any type of fire. They are especially effective for extinguishing electrical installations. The only exceptions are those types of substances that can burn without oxygen. These include gases (natural, industrial) and alkali metals.
During operation, you must not handle the bell with unprotected hands, i.e. no gloves. Due to the strong cooling effect, the temperature of the bell can drop sharply to -70 degrees. Thermal skin burns are possible.
They come in two types: manual and mobile. Let's look at how to use them.
- Remove the hand-held fire extinguisher from its mounting location.
- Break the seal.
- The socket must be in a horizontal position.
- Click on the special lever.
- Direct the resulting stream of extinguishing agent towards the source of the fire.
- Actions with mobile carbon dioxide fire extinguisher
- Unwind the rubber hose
- Take a comfortable position to put out the fire
- Remove the seal, turn the lever towards you until it stops
- Point the bell towards the fire
They should be checked every year. Weighing is usually carried out. It should also be recharged once every 5 years.
You will also be interested in reading the materials about fire extinguishers in our article: ““.
Procedure and rules for using a fire extinguisher
Regardless of the type of extinguishing agent and type of fire extinguisher, certain general recommendations when using them. This will make their use more effective.
- Always try to point the nozzle directly at the source of the fire. Do not extinguish while being at a long distance from the fire. The optimal distance is the one corresponding to the minimum jet length (indicated on the label).
- Don't forget about the valve or pin.
- The wind should blow at your back. Consider weather conditions. Strong wind will fan the flame. It is optimal to work here with several fire extinguishers from different sides.
- When extinguishing burning objects under electric shock The extinguishing agent should be supplied in parts at intervals of 5 seconds.
- Maintain a safe distance when extinguishing fires in electrical installations - 1 m.
- When using a carbon dioxide fire extinguisher, wear gloves to avoid injury.
- Stew oil compositions follows below.
- Start fighting the fire from the edge of the fire closest to you. As the fire subsides, move further.
- Take your time, extinguish gradually, without sudden jerks.
- Use all fire extinguishers available. It is advisable to do this at the same time if there are still free people.
Additional on slides
Fire extinguisher - technical device, with the help of which you can fight the combustion of both solid objects and liquids, gases, including electrical appliances.
Rules for using a fire extinguisher can be read on it surfaces, where presented brief instructions. The main task every person is an opportunity correct application such a technical device. It is useful to know in detail about actions taken during a fire.
General rules for using a fire extinguisher
Before using the device, please remember following:
At the moment of the start of the fire, the fire extinguisher is transferred to the source of ignition for a sufficient distance close range(for public buildings - on 20 m, for production – on 30-40 m). We must also remember that The jet length of the technical device reaches 3 meters.
Subsequence Proper use of a fire extinguisher:
- it is necessary to remove the seal located on the locking and starting device,
- get the check
- turn the hose nozzle towards the source of fire,
- turn the valve or operate the lever.
After a few seconds, the fire extinguisher will come into effect and begin spraying process flame retardant. The jet is directed from the leeward side. The fire in the niche must be extinguished top down.
There are specific rules for using a fire extinguisher in pictures, where all types of technical devices are presented.
Instructions for operating a powder fire extinguisher
A powder fire extinguisher is considered universal due to operating temperature range, and areas of use. The charge for this flame retardant is powder.
- The type of fire extinguisher in question is not suitable for extinguishing fire that covers electrical equipment located under voltage 1000 V.
- In addition, it is not necessary to use this type of device in places where direct contact of powder with equipment could lead to damage the last one.
- IN small-sized indoors, you should also not extinguish the fire with a powder fire extinguisher. During its operation, there is a lot of dust in the air, and visibility deteriorates. Flame extinguishing powder makes it difficult for a person to breathe.
Instructions for operating a gas fire extinguisher
There are carbon dioxide and freon gas fire extinguishers.
- Firefighting in small room with help carbon dioxide fire extinguisher accompanied by the release of a considerable amount of carbon dioxide, which contributes to loss of consciousness of a person. Based on this, it is urgent It is recommended to hold your breath.
- Such devices are not suitable in the event of fire in electrical equipment located under voltage 1000 W.
- Freon fire extinguishers provide safety of electrical equipment, since they have a fire extinguishing composition that does not damage equipment, they also have a good cooling effect.
- Gas fire extinguishers used in case of fire of radio-electronic equipment, valuable archival documents, rare exhibits in museums.
- The disadvantage of a flame retardant is charge toxicity. As a result, fire neutralization in small rooms is carried out through door openings or ventilation holes.
Instructions for operating a water fire extinguisher
Water fire extinguisher Suitable for eliminating class A (solid) and class B (liquid) fires.
- The flame extinguishing agent is especially suitable for neutralizing the fire of burning plastic, paper, and fabric.
- This technical device must not be activated in case of fire. electrical equipment, very hot, molten materials, flammable liquids. Otherwise, the ignition process will continue and worsen the situation.
Before extinguishing a fire using any fire extinguisher, it is worth considering the location of the fire itself, including the type of flame extinguishing agent used.
Instructions for using a foam fire extinguisher
These fire extinguishers include flame extinguishing agents containing air-foam and air-emulsion components.
- Foam fire extinguishers Particularly suitable for extinguishing fires of solid and liquid materials.
- The use of the devices in question for very hot and molten substances is prohibited. Should not be used foam fire extinguisher when extinguishing equipment under electrical voltage.
The most universally accepted powder fire extinguishers. However, they can pollute the air. As a result, it makes no sense to use such flame extinguishing agents to extinguish fire in rooms with a small area.
First, let's get acquainted with fire extinguishers according to their various types, which are a priority in offices, warehouses, workshops, as well as in cars and sometimes in apartments.
Fire extinguishers come in the following types: water, foam, carbon dioxide, powder, a combination of the four above - industrial.
Water fire extinguishers can be used without any fear, but taking into account the fire zone: it is forbidden to extinguish equipment connected to electricity, as well as chemical reagents(for example, aluminum powder, calcium carbide, magnesium). Water - the best remedy to suppress fires, especially wood fires.
Carbon dioxide fire extinguishers of OU types (carbon dioxide fire extinguisher) - 2, 5, 10. The number after the mark indicates the weight of the carbon dioxide charge.
Before using a fire extinguisher, the user must wear mittens or gloves to avoid frostbite of the soft tissues of the hands, since when carbon dioxide is consumed, the metal components and the fire extinguisher mouth cool down to -70 degrees Celsius, which means there is a real chance of injury.
The messages on the fire extinguisher sticker always contain information about what classes of fires it can fight. But, based on real experience of application in industrial conditions, fire classes E (electrical installations) should be eliminated only after a power outage, although the opposite is indicated on carbon dioxide fire extinguishers.
Powder fire extinguishers of the OP (powder fire extinguisher) and OPU (universal powder fire extinguisher) categories are often found in enterprises and offices. The brand also uses a number indicating the mass of the substance in the fire extinguisher in kilograms: OP-4з. The letters after the brand can be (z, g, b), which means their design.
Z - pump-in fire extinguisher: there is already pressure in the cylinder, as evidenced by a pressure gauge with an arrow-pointer, fixed between the frame and the handle. If the pointer does not float in the green zone, then such a fire extinguisher cannot be used due to excess or lack of pressure.
G, B - “gas-generating”, “balloon”; they work from the reaction of special substances: first, a process is launched that guarantees the required pressure 4-5 seconds after pressing the button or handle. After which you can begin to localize the fire.
When activated powder fire extinguisher Use respiratory and eye protectors, as the powder is very sticky after contact with oxygen, and is also bitter and can cause an allergic reaction, severe coughing and eye pain.
As is the case with his younger brother- carbon dioxide, powder has a sticker with types of work on possible fires and also based on industrial experience: it is not recommended to use it on live objects without first turning them off.
The general scheme for using a fire extinguisher is as follows:
1. The fire extinguisher is supplied to the fire zone;
2. Ammunition is used to protect the hands and/or respiratory tract;
3. The socket or hose of the fire extinguisher is directed towards the center of the fire;
4. The seal is removed and the check is pulled out;
5. Press the handle, button (d, b); if the variety is gas-generating or balloon, then wait an additional 4-5 seconds for OP-4, 5 (d, b). If the fire extinguisher is larger, then you need to hold it for 6-7 seconds;
6. The substance is sprayed.
The use of a water or foam fire extinguisher, as well as combined ones, is similar to the use of powder or carbon dioxide, with the exception of the need for protective equipment.
If wood is burning, then after extinguishing it with a powder or carbon dioxide fire extinguisher, it is necessary to additionally pour water on it, in order to avoid hidden pyrolysis of the wood and re-ignition.
Don't forget your phone fire service- 01, from cell phones - 112.
