What is the basis of DN100 and DN150 for hydrant pipe diameter?
Mainly in accordance with norms and flow calculation to determine, such as vertical pipe shall not be less than DN100, fire hydrant water supply pipe flow rate should not be greater than 2.5m/s, more than is DN150 or DN200.
Hydrants, officially called fire hydrants, are a type of fixed fire fighting facilities, which control fuel, insulate fire and eliminate fire. Indoor fire hydrant and outdoor hydrant.
The fire fighting system includes outdoor fire hydrant system, indoor fire hydrant system, fire extinguisher system, and some automatic sprinkler system, water gun system, gas fire extinguishing system, fire detection system, water mist system and so on. Fire hydrant mainly for fire engines from the municipal water supply network or outdoor fire water network to implement fire fighting, can also be directly connected to the hose, water gun fire extinguishing. Therefore, indoor and outdoor fire hydrant system is also one of the important fire fighting facilities.
