What is the minimum design pressure for outdoor fire hydrants?
Outdoor fire water supply when using high-pressure or temporary high-pressure water supply system, water supply pipeline pressure should be able to guarantee the total water reached the maximum and the highest water in any building, gun full water column is still not less than 10m; when the low pressure water supply system, outdoor hydrant outlet pressure from the ground is not outdoor design should be less than 0.1MPa.
The pressure of the high pressure or temporary high pressure water supply system of the high building (warehouse) shall meet the requirements of the water pressure at the most unfavorable point in the room;
Fire hydrant water supply pipe design speed shall not be greater than 2.5m/s.
In calculating the water pressure, the nozzle should be 19mm caliber water cannon and the diameter of 65mm, length of 120m lining fire hose parameters, the flow of each nozzle should not be less than 5L/s;
