- December 31, 2023
Imen Datis Asia Co
Water fire extinguishing systems include the following equipment and tools.
– The main source or source (Storage Tank)
– Pipes and branches (Pipe Fitting)
– Main Pump
– Jokey or auxiliary pump (Jokey Pump)
– Wet Alarm Check Valve
– Gate valves
– Butterfly valves
– One-way valves (Check Valve)
– Test and drain valves
– Pressure Relief Valve
– Manometer or Pressure Gauge
– Flow switch and water flow detectors (Flow Switch)
– Sprinklers in different types (Fire Sprinkler)
Sprinkler systems are designed to control or contain fires. Automatic sprinklers to control the speed of fire spread and also wet the combustible materials around the fire in advance to prevent the fire from spreading. In this case, the fire will not be extinguished until all flammable materials are extinguished or firefighters actively extinguish the fire. Suppressive sprinklers (formerly known as rapid response primary suction sprinklers (ESFR)) slow the rate of heat release from a sudden fire, thereby attempting to extinguish the fire immediately before manual intervention.
Today, most sprinkler systems are designed with an area and density approach. First, the use and materials of the building are checked to determine the level of fire risk. Generally, buildings are classified into low risk groups, general risk group 1, general risk group 2, high risk group 1 and high risk group 2. Once the hazard classification is determined, a design area and density can be arrived at using the reference tables contained in the National Fire Protection Association (NFPA) standards. Design density is also a measure of the amount of water required per square foot of ground surface to apply to the design area.
This water-based system is used in areas that have electronic devices or equipment of high physical and mental value.
The preoperative system has two operators to start the operation.
In this case, if the alarm fails or gives a false alarm, the system will not work. With this fire extinguishing only if there is a real fire and there are signs such as cigarette smoke and component failure will not cause water leakage.
The pre-operator water fire extinguishing system is used in the following places:
As its name suggests, in this water fire extinguishing system, there is always water in the pipes, and the pipes are connected to the city water source or the fire pump, which increases the speed of fire suppression.
This system is one of the most common sprinkler systems for fire suppression that are used by high-rise or multi-story office buildings. Among the features of this system, we can mention its cost-effectiveness and easy maintenance conditions.
These systems are one of the types of water fire extinguishing systems that are used in places where there is a possibility of rapid fire growth or a high risk of fire.
In this model, all water exit nozzles work together; That is, after detecting the fire, the sprinkler automatic control valve or deluge valve is opened and pressurized water is released from all the nozzles at the same time.
In this system, if there is a mistake in the fire detection section and accidental discharge of water, there is a high possibility of damaging the environment.
Wherever there is a possibility of liquid fire, water foam fire extinguishing system is used.
In this system, water is mixed with foam producing material; Then the produced foam is poured over the environment like a thick blanket.
With this, in addition to cooling the fire, oxygen is separated from the combustible materials.
This system is used in various places, which include:
Depending on the amount of protection required against fire, the volume and density of the production floor is different, and this water fire extinguishing system is divided into three types of low, medium and high expansion.
Among the types of sprinkler systems, dry pipe systems are the second most widely used systems. Dry pipe systems are installed in places where the ambient temperature is sometimes so cold that if the pipe is filled with water, it will freeze and prevent it from working. Common uses of dry pipe systems are in heated buildings, parking lots, open parking garages connected to heated buildings (where wet pipe systems are used), or cold storage facilities. In areas subject to NFPA regulations, the installation of ether systems is not permitted unless the temperature range Keep the environment above F40º.
In such systems, there will be no water in the piping system while the system is operating. Instead, the network is filled with air whose pressure is lower than that of the water source. In order to prevent the water in the source (which has a higher pressure) from being forced into the piping network under normal conditions, a dry valve (a special type of one-way valve) is designed to expand the contact area. It is designed in such a way that by increasing the contact surface of the valve’s tongue with the air in the piping network (compared to the higher water pressure but the smaller contact surface of the one-way valve’s tongue), more force is applied to the one-way valve’s tongue.
When one or more series of automatic sprinklers are activated, allowing air trapped in the pipe to escape from that sprinkler. When the temperature of each sprinkler exceeds the activation threshold, that sprinkler will activate independently. As the air pressure in the pipe decreases, the pressure difference in the dry pipe also changes and causes water to enter the pipe system. The flow of water required for fire control through the sprinklers is maintained until the air in the sprinklers is released. In areas covered by NFPA 13, the time between sprinkler activation and water reaching the sprinkler is limited to about 60 seconds. In industrial applications, this amount of time is called “maximum water arrival time”. The maximum arrival time ceiling is sometimes reduced depending on the hazard classification of the area protected by the sprinkler system.
The design of water fire extinguishing systems is based on the area covered by the system and the size of the place and the density of the space under the system. The first step is to analyze the user and content of this space. These tests determine the extent and level of fire of a building.
Based on the level of risk, buildings are divided into the following categories:
– low risk (low risk)
– Normal risk group 1
– Normal risk group 2
– High-risk group 1
– High-risk group 2
After determining the risk classification, it is necessary to determine the type of profession into three categories S1, S2 and S3. The grouping of places is directly related to the level and height of the building. According to the instructions and regulations of the firefighting organization, it specifies whether the product must be among the items listed by that organization in the list of fire extinguishing system equipment or whether it has successfully obtained national and international standards.
In the next step, the volume of water needed for the successful operation of water fire extinguishing systems should be estimated. The volume of water required also determines the dimensions of the water tank. Also, all the pressure drop and pressure increase in the extinguishing system from the tank to the sprinkler should be considered in the calculations. Today, most of these calculations are done by software and through system modeling and accurate hydraulic calculations.
In the first part, some of the advantages of water fire extinguishing systems were mentioned, which we will briefly complete in the following. – The cheapest extinguishing agent – The most available extinguishing agent – The simplicity of the extinguishing system compared to other automatic fire extinguishing systems – The system is ready to work in normal mode – Automatic fire detection – Cheaper equipment and tools than other extinguishing systems – Can be used in all kinds of spaces with different heights – The possibility of re-starting the fire extinguishing system in the shortest possible time – Can be used in different geographical areas except for very cold environments with the possibility of water freezing
In this article, we tried to examine and study safety tips against fire. You can contact our experts at Imen Datis Asia for more information to increase the safety level and choose fire alarm and extinguishing equipment.
Water fire extinguishing systems can be installed in all types of spaces except very cold areas. In some areas, these types of systems are used even by adding antifreeze to the water in colder environments. In general, these systems can be used in the following spaces.
– Warehouses
– Shopping centers
– Parking lots
– Tall buildings
– Factories
Protected elevators are used in tall buildings. These elevators help residents and firefighters during a fire. Fire alarm and smoke control systems are also installed in tall buildings.
The price of water fire extinguishing system is different depending on what type of system and what type of equipment is used. For example, the use of automatic blue fire extinguishing system is much more than manual blue fire extinguishing system. Also, extinguishing a fire through a booster pump has a higher price than installing a sprinkler.
The price of water fire extinguishing system is different depending on what type of system and what type of equipment is used. For example, the use of automatic blue fire extinguishing system is much more than manual blue fire extinguishing system. Also, extinguishing a fire through a booster pump has a higher price than installing a sprinkler.
Imen Datis Asia Company is recognized as one of the top companies in the private sector in the field of safety and fire fighting, relying on modern knowledge, continuous activity and the cooperation of highly specialized forces. This group is always trying to continuously and dynamically expand the safety and firefighting infrastructure of our beloved country Iran and take great steps in order to achieve goals such as the development and industrialization of new technologies.
Imen Datis Asia company, with expertise in supplying and equipping fire alarm and extinguishing systems, is a leader in providing quality products and specialized consultations. With an experienced team, we are trying to provide the highest level of security and protection to our customers.
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