水管管径计算

水管管径(mm)1520253240506580100125150200250300350400450500闭式水系统m水柱/100m流速（m3/h)0~0.50~40.5~12~41~21.7~42~41.2~44~62.0~46~111.3~411~182~418~321.5~432~651.25~465~1151.5~4115~1851.25~4185~3801~4380~5601.25~2.75560~8201.25~2.25820~9501.25~2950~12501~1.751250~15900.9~1.51590~20000.8~1.25151.81.5开式水系统　m水柱/100m流速（m3/h)0~1.31.3~22~44~88~1414~2222~4545~8282~130130~200200~340340~470470~610610~750750~10001000~12300~41.2~41.5~41.5~41.2~41.8~41.0~41.3~41.6~41.0~2.30.8~20.8~1.61.0~1.50.8~1.20.20.7~1.0251.20.8321.41401.71.25021.3>5031.5冷凝水管最大流速公称直径（mm)一般管网有特安静要求的室内管网管道最小坡度0.010.03管道公称直径（mm)2010.65冷凝水管径表择选<7<17DN207-17.617-42DN25冷负荷（KW）17.7-100101-17642-230230-400DN32DN40177-598599-10551056-15121513-12462>12462400-11001100-20002001-3500>15000>15000DN50DN80DN100DN125DN150低压系统，小于等于DN50的可用焊接钢管，大于DN的用无缝钢管，高压系统可一律采用无缝钢管冷凝水管可采用镀锌钢管或塑料管，不宜采用焊接钢管。管道一般都需保温，管道保温前要刷两道防锈底漆。每1kw冷负荷最大冷凝水量一般为0.4-0.8kg。