It is generally believed that as soon as the fire truck arrives at the fire, it can immediately extinguish the fire. In actual fact, a considerable number of fire engines equipped with fire brigades are waterless, such as high-power fire fighting vehicles, rescue vehicles, and fire lighting vehicles. They must be used in combination with fire fighting vehicles. Some fire extinguishing fire trucks, due to their limited carrying capacity, urgently need to search for water sources during fire extinguishing. At this time, the fire hydrant exerted a huge water supply function. Fire hydrants are an important tool to ensure the fire fighting of a fire department.
How to choose hydrant?
1. When the building is within the protection radius of the municipal fire hydrant within 150m and the fire-fighting water consumption does not exceed 15L/s, no outdoor fire hydrant may be provided.
2. Outdoor fire hydrants should be evenly arranged along high-rise buildings and should not be concentrated on one side of the building.
3, civil air defense project outdoor fire fighter from the civil air defense project entrance should not be less than 5m.
4. The outdoor fire hydrant of the parking lot should be set along the parking lot, and it should not be less than 7m from the nearest row of cars and not less than 15m from the gas station or library.
5, outdoor fire hydrant should be set in a place convenient for fire engines.
6, outdoor fire hydrant should adopt the ground type, when using underground fire hydrant, there should be obvious signs. The underground area is used in cold areas, and the ground type is adopted in non-cold areas, and the anti-collision type is available in ground conditions.
7. Outdoor ground type fire hydrants shall have a diameter of 150mm or 100mm and two bolts with a diameter of 65mm. Outdoor underground fire hydrants shall have one each with a diameter of 100 and 65 mm.
8. The protection radius of outdoor fire hydrants should not exceed 150m, and the spacing should not exceed 120m.
9, outdoor fire hydrant from the roadside should not exceed 2m, from the house exterior wall should not be less than 5m.
How to install fire hydrant?
Fire hydrants: Connected to fire water supply systems or water supply systems, with on-off valves and one or more outlets are used to supply water for fire hoses or to supply water to fire trucks. Fire hydrant is divided into indoor fire hydrant and outdoor fire hydrant.
When indoor and outdoor fire hydrants are directly supplied by municipal water supply pipes and independent fire water supply systems are used, backflow preventers shall be provided at the interface with the municipal water supply pipe network.
Dry water hydrant system should not be more than 3 minutes water filling time.
The number of outdoor fire hydrants should be determined based on comprehensive calculation of fire hydrants' protection radius and outdoor fire hydrant fire-fighting water consumption. The output of each outdoor fire hydrant should be calculated at 15 L/s, and the distance from the protection target should be within the range of 5 to 40 m. , can be included in the number of outdoor fire hydrant.
Outdoor fire hydrants should be evenly arranged along high-rise buildings, and should not be centrally arranged on one side of a building. The number of outdoor fire hydrants on the side of a high-rise building's rescue surface should not be less than two.
An outdoor fire hydrant should be installed in front of the backflow preventer from the inlet pipe of the municipal water supply network.
The fire water supply pipe network application valve is divided into several independent sections, and the number of fire hydrants in each section should not exceed five.
The distance between the outdoor fire hydrant and the fire pump adapter shall not be less than 15m and not more than 40m.
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