What are the rules for the placement of indoor fire hydrants?

(1) Fire hydrants should be installed on each floor of the building. Fire hydrants of uniform specifications should be used throughout a building. Generally, fire hydrants with a spout diameter of 65mm should be used. The diameter of the nozzle should not be less than 19mm and the length should not exceed With a 25mm water hose, indoor fire hydrants should be located in clearly accessible places such as walkways and stairs. Regardless of single-story, multi-story or high-rise buildings, it should be ensured that the sufficient water column from adjacent fire hydrant water guns reaches any part of the room at the same time. In order to be effective When one fire hydrant is threatened by fire, another fire hydrant adjacent to it can still protect any part of the room. Therefore, each fire hydrant is still calculated as a water gun. Therefore, only a single-bolt, single-port fire hydrant can be used, but a single-bolt, double-port fire hydrant cannot be used. When the building height is less than or equal to 24m, and the volume is less than or equal to 5000m3 warehouse, a water gun can be used to fill the water column to reach any part of the room.

(2) In fire extinguishing, the basic concept of enriched water column (also called enriched water flow) is: water jet with enriched core section. The length of the water column of the water gun should be determined through hydraulic calculation, and should not be less than 7m for general buildings. Category A and B factory buildings, factories and warehouses with more than 4 floors, as well as multi-story civil buildings with more than 6 floors and high-rise civil buildings with a building height not exceeding 100m should not be less than 10m, high-rise industrial buildings, elevated warehouses and building heights exceeding 100m High-rise civil buildings should not be less than 13m.

(3) The spacing of indoor fire hydrants

The spacing of indoor fire hydrants is determined by calculation. However, in order to prevent unreasonable layout and ensure the reliability of fire extinguishing, the spacing of indoor fire hydrants is specified. The maximum layout spacing is: high-rise industrial and civil buildings, elevated warehouses, and Class A and B factory buildings, which should not exceed 30m. Other single-story buildings and multi-story buildings, including podiums of high-rise civil buildings, etc., should not exceed 50m.

(4) Arrangement requirements for indoor fire hydrants

1. In order to enable people on site to discover and use fire hydrants in a timely manner, indoor fire hydrants should be clearly marked. Fire hydrants should be painted red and should not be disguised as something else.

2. The height of the indoor fire hydrant mouth from the ground should be 1.0m. In order to reduce local water head loss and facilitate operation, the water outlet direction should be underground or at an angle of 90° to the wall where the fire hydrant is installed.

3. The front room of the fire elevator is the offensive bridgehead for firefighters to enter the room to put out the fire. In order for firefighters to launch an attack on the fire scene or open a path, an indoor fire hydrant should be installed in the front room of the fire elevator.

4. In order to prevent freezing damage, indoor fire hydrants in cold storage should generally be located in halls or stairwells at room temperature. There should be a fire hydrant at the entrance of the cold storage into the stuffy roof to facilitate fighting fires in the top insulation layer.

5. Fire hydrants, water hoses and water guns of uniform specifications should be used in Tongyi buildings so that fire hydrants can be used to break glass in case of fire.

6. When the water pressure at the fire hydrant mouth exceeds 0.5Mpa, pressure relief facilities should be installed. The pressure reducing facility is generally a pressure reducing valve or a pressure reducing orifice plate.

7. For high-rise industrial and civil buildings and other low-rise buildings where the water tank cannot meet the water pressure requirements of the fire hydrant at the most unfavorable point, a button to directly start the fire water pump should be installed at each fire hydrant so that the fire water pump can be started in a timely manner and the supply When using water at the fire scene, the buttons should be equipped with protective facilities.