Indoor fire hydrant water supply system?

What is the specific content of indoor fire hydrant water supply system? Zhong Da Consulting will answer your questions below.

The division of fire hydrant water supply system for high-rise and low-rise buildings is based on China's Code for Fire Protection Design of High-rise Civil Buildings: residential buildings with a building height of no more than l0 floors and other civil buildings with a building height of less than 24m are low-rise buildings, otherwise they are high-rise buildings.

A, indoor fire hydrant water supply system setting principle

According to China's current Code for Fire Protection Design of Buildings, Code for Fire Protection Design of High-rise Civil Buildings and Code for Fire Protection Design of Civil Air Defense Works, the buildings that should be equipped with indoor fire hydrant water supply systems are as follows.

(1) workshops, warehouses (workshops and warehouses of combustible materials with fire resistance grades of 1 and below, workshops with fire resistance grades of 3 and 4 and a building volume of less than 3000m3, except for workshops with a building volume of less than 5000m3) and scientific research buildings (except for rooms with articles that can cause combustion and explosion when exposed to water and are not suitable for water supply).

(2) More than 800 theaters, cinemas, clubs and 1200 auditorium and gymnasium.

(3) stations, docks and airports with a building volume of more than 5000m3, as well as exhibition halls, shops, ward buildings, outpatient buildings, teaching buildings and libraries.

(4) Units with more than 7 floors, towers with more than 6 floors, corridor rooms, and units with commercial outlets on the ground floor.

⑤ Other civil buildings with more than 5 floors or more than 10000m3.

⑥ Key brick-wood ancient buildings of national cultural relics protection units.

Various high-rise civil buildings.

(8) The use area exceeds 300m2, and it is used as the civil air defense project of shopping malls, hospitals, exhibition halls, stadiums, roller skating rinks, dance halls and electronic amusement halls; The use area is more than 450m2, and it is used as the civil air defense project of restaurants, C and D production workshops and C and D goods warehouses, and as the civil air defense project of auditoriums, cinemas and front rooms of fire elevator rooms.

Second, the composition of indoor fire hydrant water supply system

Indoor hydrant water supply system consists of water gun, hose, hydrant, fire hose, fire hose, fire pool, water tank, pressurizing equipment and water source. When the water pressure of outdoor water supply network can't meet the requirements of indoor fire protection, fire pumps and water tanks should be set up.

Three, indoor fire hydrant water supply system type

The types of indoor hydrant water supply systems are classified according to high-rise and low-rise buildings, including low-rise building indoor hydrant water supply systems and high-rise building indoor hydrant water supply systems.

1. Classification of indoor water supply hydrant water supply system in low-rise buildings

(1) indoor fire hydrant water supply system, no water tank and water pump.

② Fire hydrant water supply system with only water tank and no water pump.

③ Indoor fire hydrant water supply system with fire pump and fire water tank.

2. Classification of indoor fire hydrant water supply system in high-rise buildings

① Centralized high-pressure and temporary high-pressure indoor fire water supply system in high-rise building area.

(2) indoor fire hydrant water supply system, partition water supply.

Four, fire hydrant water supply system equipment

Fire hydrant water supply system equipment includes: ① fire hydrant; ② Hose; 3 water gun; ④ Water pump adapter; ⑤ Fire storage tank; ⑥ Fire water tank; ⑦ Fire shutter.

See property equipment and facilities management for details.

Five, fire hydrant water supply system layout requirements and water consumption

1. Layout requirements

(1) Ensure that the full water column of two water guns on the same floor (that is, the dense water column in the water gun jet has enough power to extinguish the fire) reaches any part of the room at the same time. Only warehouses with a building height of less than 24m and a volume of less than 5000m3 can use the full water column of water guns to reach any part of the room. The full water column length of the water gun should be determined by calculation, and generally it should not be less than 7m, but it should not be less than 10m for civil buildings with more than six floors and factories and warehouses with more than four floors.

(2) In the combined system, the fire hydrant riser should be set independently and cannot be shared with the domestic water supply riser.

③ The diameter of hydrant water supply riser in low-rise buildings shall not be less than 50mm, and that of hydrant water supply riser in high-rise buildings shall not be less than100 mm. 。

(4) Fire hydrants should be located in obviously accessible locations, such as stairwells, corridors, fire elevator forerooms, etc. The height of the muzzle from the installation ground is 1. 1m, and the opening of the hydrant should be downward or vertical to the wall.

⑤ Fire hydrants, hoses and water guns with the same specifications should be used in the same building.

2. Water consumption

Indoor fire water consumption is the product of the number of water guns used at the same time and the water consumption of each water gun. According to the statistics of fire extinguishing effect, the control rate of 1 water gun at the fire site is 40%, and the control rate of two water guns at the same time is 65%. Therefore, in the early stage of fire, it is generally not recommended to have at least two water guns at the same time, and only one water gun is considered when the building volume is small.

The water consumption of indoor fire hydrant water supply system is related to the building type, area, height, structure, fire resistance rating and production nature, and its value cannot be less than Schedule 6 and Schedule 7 (see property equipment and facilities management).

The indoor water supply network with unified fire water, domestic water and production water should still be able to ensure sufficient fire water supply when the domestic water and production water reach the maximum water consumption.

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