Indoor fire hydrant is an important part of the fire protection system, it is installed in the indoor fire box, general nominal diameter (mm): DN50, DN65 two kinds, nominal working pressure 1.6MPa, strength test pressure 2.4MPa, suitable medium: water cleaning, foam mixture. The layout of the hydrant is more stringent.
1. Buildings with fire water supply shall be provided with fire hydrants, except for each layer (except for the equipment layer without combustible materials).
Two, indoor fire hydrant layout, should ensure that two water guns full of water column at the same time to reach any part of the room. If the building height is less than or equal to 24m and the volume is less than or equal to 5000m3, the warehouse can be filled with 1 water guns to reach any part of the room. The length of the full water column of the water gun should be determined by the calculation, and it should not be less than 7m, but it should not be less than 10m in the building of class A and B, more than six layers of civil buildings, more than four storehouses and storeroom, and the full water column of water gun should not be less than that of 13m water column in high industrial buildings and elevated storeroom.
Three. The hydrostatic pressure of the hydrant plug should not exceed 80m water column. If the water column exceeds 80m, the district water supply system should be adopted. When the outlet pressure of hydrant plug exceeds 50m water column, decompression facilities should be provided.
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