The hydrostatic pressure at the fire hydrant outlet should not be greater than 1.00MPa, and when it is greater than 1.00MPa, a partitioned water supply system should be adopted. When the outlet water pressure of the fire hydrant is greater than 0.5MPa, decompression measures should be taken. The pressure of indoor fire hydrants and the filling water column of fire water nozzles shall meet the following requirements, and the design pressure of fire water supply shall meet the pressure requirements of water fire extinguishing facilities at the most unfavorable points of various water fire extinguishing systems served.
1. The dynamic pressure of the fire hydrant should not be greater than 0.50MPa. If it is greater than 0.70MPa, a pressure reducing device must be installed.
2. In places such as high-rise buildings, factories, warehouses and civil buildings with an indoor clearance height exceeding 8m, the dynamic pressure of the fire hydrant should not be less than 0.35MPa. , and the filling water column of the fire water gun should be calculated as 13m in other places, the dynamic pressure of the fire hydrant should not be less than 0.25MPa, and the filling water column of the fire water gun should be calculated as 10m.
3.The fire-fighting water supply pressure in the indoor fire hydrant system pipeline of urban traffic tunnels should ensure that when the water consumption reaches the maximum, the minimum pressure should not be less than 0.30MPa, but when the outlet water pressure at the fire hydrant outlet exceeds 0.70MPa, decompression facilities should be set up and must be kept. Address of this article: https://baike.86580.cn/article/162870.html
