冷凝水管管径选择水管承担冷量Q管径（DN水管承担冷量Q管径（DN(KW(mm(KW(mm<720599~1055807.1~17.6251056~151210017.7~100321513~12462125101~17640>12462150177~59850公称直径DN无缝钢管冷量规格表示外径壁厚质量81014*3.0143.00.81415<2kw18*3.0183.01.11202~5kw25*3.0253.01.63255~8kw32*3.5323.52.46328~16kw38*3.5383.52.984016~25kw45*3.5453.53585025~49kw57*3.5573.54.626549~90kw76*4.0764.07.108090~150kw89*4.0894.08.38100150~300kw108*4.01084.010.26125300~510kw133*4.01334.012.73150510~880kw159*4.51594.517.15200880~1900kw219*6.02196.031.542502000kw<273*7.02737.045.92300325*8.03258.062.54400426*9.04269.092.55500530*9.05309.0105.5。