Design of setting height and volume of high-level

2022-07-22
  • Detail

The height of the high-level fire water tank in the building has always been a controversial topic. Its location and volume have a great impact on the effect of fire protection. In order to maximize its function, the fire safety department should carefully study the relevant contents of the water tank setting, and whether the water storage system of the high-level fire water tank needs to be separated from the water storage system of the fire hydrant, Or discuss the water storage demand and the volume of the water tank carefully, so as to effectively control the fire after the building fire, and avoid the spread of the fire, causing greater economic losses and casualties. The high-level fire water tank is an important water storage equipment in the fire protection work, and there are certain requirements for its setting in the relevant code for building fire protection in China. Therefore, relevant designers need to set the water tank according to the rules and regulations, so as to ensure that all the settings of the high-level fire water tank meet the standards

the height of the high-level fire water tank in the building has always been a controversial topic. Its location and volume have a great impact on the effect of fire protection. In order to maximize its function, the fire safety department should carefully study the relevant contents of the water tank setting, and whether the water storage system of the high-level fire water tank needs to be separated from the water storage system of the fire hydrant, Or discuss the water storage demand and the volume of the water tank carefully, so as to effectively control the fire after the building fire, and avoid the spread of the fire, causing greater economic losses and casualties. The high-level fire water tank is an important water storage equipment in the fire protection work, and there are certain requirements for its setting in the relevant code for building fire protection in China. Therefore, relevant designers need to set the water tank according to the rules and regulations, so as to ensure that all the settings of the high-level fire water tank meet the standards

introduction to high-level fire water tank

high-level fire water tank refers to the water tank whose static pressure meets the requirements of the specification and meets the water pressure of the fire hydrant at the most unfavorable point. It uses gravity gravity to supply water and is set at the highest part of the building. When the static pressure cannot meet the water pressure of the fire hydrant at the most unfavorable point, pressure boosting and stabilizing facilities should be set. The temporary high-pressure fire water supply system must be equipped with a fire water tank, which can only meet the fire water pressure and cannot guarantee the fire water consumption at ordinary times. In case of fire, the water consumption for fire fighting shall be provided by starting the fire pump

high level fire water tank

1 Installation and commissioning

the foundation can adopt concrete strip beam or I-beam. The top corner of the combined stainless steel water tank is equipped with a breathable air filtration device. The specification and quantity of the device are determined by the user according to the size of the inlet. Tie bars are used inside the combined stainless steel water tank. All nozzle flanges are 1.0MPa standard flanges. When arranging the position of combined stainless steel water tank, it should refer to gb17051-1997 sanitary code for secondary water supply facilities. When the specification and technical parameters or orientation of the combined stainless steel water tank are not suitable for the actual use, the designer of the stainless steel water tank shall propose and determine according to the actual needs

2. Scope of action

the combined stainless steel water tank is widely used in real estate, industrial and mining, enterprises and institutions, residential buildings, hotels, restaurants and other buildings, as drinking water, fire water and water storage facilities for food, medicine, health and other water with high water quality requirements

3. Box process

the light and beautiful high-quality stamping process of the box not only ensures the maximum pressure bearing needs of the box, but also reduces the material thickness, meeting the requirements of the beautiful and practical box

characteristics of high-level fire water tank

high-level FRP fire water tank is a new type of water tank used internationally. It is assembled from the overall high-quality FRP water tank plate. It is characterized by the use of food grade resin, so it has the characteristics of good water quality, clean and pollution-free, high strength, light weight, corrosion resistance, beautiful appearance, long service life, convenient maintenance and management, etc. It is widely used in industrial and mining, enterprises and institutions, residential buildings, hotels, restaurants and other buildings as drinking water, reclaimed water treatment, fire water and other water storage facilities

structural characteristics of high-level fire water tank

the structure of high-level FRP fire water tank is unique: with special sealing strip and full bolt connection structure, it is easy to assemble, and there will be no water leakage and loose sealing. With the special pull rod structure inside, the mechanical properties are more reasonable. The construction of FRP high-level fire water tank is fast: Standard molded plate; Assemble at will without hoisting equipment. The shape should meet the user's requirements, and the volume can meet all design requirements. There are no special requirements on the installation site

regulations on the volume of high-level fire water tank

class I high-rise public buildings should not be less than 36t, but when the building height is greater than 100 meters, it should not be less than 50t, and when the building height is greater than 150 meters, it should not be less than 100t

multi storey public buildings, class II high-rise public buildings and class I high-rise residential buildings should not be less than 18t. When the height of class I high-rise residential buildings is greater than 100 meters, it should not be less than 36t

class II high-rise residential buildings should not be less than 12t

the design flow of indoor fire water supply for multi-storey residential buildings with a building height of more than 21 meters shall not be less than 6T

industrial buildings shall not be less than 12t when it is less than or equal to 25l/s, and shall not be less than 18t when it is greater than 25l/s

store buildings with a total building area of more than 10000 ㎡ and less than 30000 ㎡ shall not be less than 36t, and stores with a total building area of more than 30000 ㎡ shall not be less than 50t. When it is inconsistent with the provisions of the first paragraph of this article, the larger value shall be taken

setting height of high-level fire water tank

high-level fire water tank is generally set at the highest part of the building. Most construction projects in China are designed in this way, but some super high-rise buildings do not consider the use effect of the water tank when setting the high-level fire water tank, and there is no pressurization facility, sometimes the water tank cannot play its role. The pressure of municipal water supply network in many cities in China can not make the fire protection system in a constant high-pressure state. Generally, the fire protection in a single building adopts a temporary high-pressure water supply system. The reliability of the temporary high-pressure water supply system is low, so the building using this system should be equipped with a high-level fire water tank. In high-rise buildings, the hydrostatic pressure of the most unfavorable fire hydrant is generally not less than 0.07MPa, and the water pressure of the most unfavorable point of the automatic sprinkler system is not less than 0.05Mpa. Therefore, when setting a high-level fire water tank in the building, it needs to be at least 7.5m above. If this requirement cannot be met, the minimum water level needs to be too high. The pressure of automatic sprinkler system in use belongs to dynamic pressure, so the loss of sprinkler system should be considered in design. The pipe section of this system is relatively long, and the loss of water head is relatively large in the process of circulation. In order to ensure the pressure of sprinkler, it is also necessary to consider the use of gravity flow. Therefore, when setting the height of high-level fire water tank, it will generally be higher than the position of fire hydrant system. However, after investigation, most construction units did not design like this, but set up pressurization facilities in the building to meet the requirements of the fire system for water pressure

pressurization facilities are common objects in high-rise buildings, which have a great impact on the effectiveness of fire-fighting facilities. They are also tools that high-level fire water tanks need to use to achieve sprinkler pressure. They are generally composed of booster pumps or pneumatic water tanks. The pressurization setting is a facility used to maintain the pressure of the fire system. If there is no pressurization setting, the high-level fire water tank set at the highest position of the high-rise building cannot play a role. Therefore, the setting height of the high-level fire water tank has a great relationship with the location of the pressurization facilities. The water storage in the water tank cannot meet the requirements of the fire protection system for the outlet pressure by gravity flow alone. As long as the pressurization facilities are equipped, the position of the high-level fire water tank can be adjusted at will. In order to ensure the beauty of the building, some construction units do not set up functional rooms on the roof of the building, but considering the safety of building fire protection, the position of the fire water tank must be adjusted. It is best to set it on the top floor of the building, and the number of pressurization facilities needs to be increased to ensure the function of the fire protection system. Therefore, the setting of the height of the high-level fire water tank is also related to the preferences of architectural designers, and the design of the roof is also quite different due to the different functions and structures of the building. When setting the high-level fire water tank, we should follow the principle of ensuring the safety of the building. The high-level fire water tank is directly related to the safety of high-rise buildings. In order to ensure the water pressure of the fire hydrant system and the automatic sprinkler system, we must add pressurization facilities at appropriate positions, so that the height of the high-level fire water tank can be adjusted randomly, so that the building can ensure the beauty of the appearance on the premise of safety

design of the volume of the high-level fire water tank

the high-level fire water tank is an important water storage tool in the fire protection system. It generally stores the initial fire water for 10min. In the initial stage of a fire, before the firefighters arrive at the scene, extinguishing the fire mainly depends on the automatic sprinkler system and non fire professionals using fire extinguishers and fire hose reels for self rescue. Therefore, it is more appropriate to determine the water consumption of the fire hydrant at the initial stage according to the water output of the fire hose reel. At present, the fire protection design Code stipulates the fire hose reel as follows:

Article 8.3.3 of the code for fire protection design of buildings stipulates that fire hose reels should be set in densely populated public buildings with indoor fire hydrants and other public buildings with a scale lower than that specified in Article 8.3.1 of this code; Commercial service outlets with a building area of more than 200m2 shall be equipped with fire hose reels or portable fire hoses

article 7.2.4 of the code for fire protection design of high rise civil buildings stipulates that high-end hotels, important office buildings, commercial buildings of class I buildings, exhibition buildings, comprehensive buildings and other high-rise buildings with a building height of more than 100m should be equipped with fire reels, and their water consumption can not be included in the total amount of fire water. Article 7.4.9 stipulates that the distance between fire reels should ensure that a stream of water can reach any part of the indoor ground, and the installation height of fire reels should be easy to access

editor's summary: the above is the introduction of relevant knowledge about the design of the height and volume of the high-level fire water tank. I hope it can help friends with this need! If you need more relevant information, please continue to follow our website, and more wonderful content will be presented in the future. You can also go to Qijia mall to buy more products you like

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