According to the designed flow rate, according to the standard GB50084-2001, the diameter of the branch pipe is selected according to the flow rate. Generally speaking, for medium-risk level (most common): DN25 with one sprinkler head, DN32 with three sprinkler heads, DN40 with four sprinkler heads, yuniguhua.71ix.comshijiazhuang.75ix.cnyesanpo.37ix.com.cnbaoding.75ix.cnmojusn.37ix.com.cn

bxgxianwei.37ix.com.cnDN50 with eight sprinkler heads, DN70 with 16 sprinkler heads, DN80 with 32 sprinkler heads, DN100 with 63 sprinkler heads, DN150 with 800 sprinkler heads (i.e. maximum capacity of DN150 wet alarm valve), for light-risk level, it can be relaxed appropriately.