Layout requirements and water consumption of fire hydrant water supply system?

The following is the layout requirements and water consumption of fire hydrant water supply system brought by Zhong Da Consulting for your reference.

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 initial 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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