The difference between single hydrant and double hydrant
Indoor fire hydrant arrangement is to ensure that two water guns (single plug) of the full water column at the same time to reach any part of the room. Fire regulations: highrise building and elevated warehouse, a and B plants, indoor fire hydrant spacing should not be more than 30 meters distance; other single-layer and multi-layer building fire hydrant should not exceed 50 meters (above refers to a single bolt). That is to say, in some occasions, it is not appropriate to set fire hydrant (Dan Shuan) within 30 meters or 50 meters distance, that is, only increasing the spacing to set up double bolts
The fire hydrant hose is generally 20 meters long, is 25 meters, the fire hydrant is calculated according to the gun full water column length and the effective radius of fire set
Fire hydrant is divided into indoor and outdoor two. A fire hydrant is set up inside a fire box (that is, fire water gun), and the hydrant with two hydrants is a double hydrant.
