1、常用钢管规格 DN 对照表DN15-18mm，DN20-25mm DN25-32mm，DN32-38mm DN40-45mm，DN50-57mm DN65-73mm，DN80-89mm DN100-108mm，DN125-133mm DN150-159mm，DN200-219mm DN250-273mm，DN300-325mm DN350-377mm，DN400-426mm DN450-480mm，DN500-530mm DN600-630mm焊接钢管规格尺寸大全壁 厚（毫米）2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5外径(毫米)理论重量（公斤/米）32 1.82 2.
2、15 2.46 2.76 3.05 3.33 3.59 3.85 4.09 4.32 4.5338 2.19 2.59 2.98 3.35 3.72 4.07 4.41 4.74 5.05 5.35 5.6442 2.44 2.89 3.35 3.75 4.16 4.56 4.95 5.33 5.69 6.04 6.3845 2.62 3.11 3.58 4.04 4.49 4.93 5.36 5.77 6.17 6.56 6.9450 2.93 3.48 4.01 4.54 5.05 5.55 6.04 6.51 6.97 7.42 7.8654 - 3.77 4.36 4.93 5.49
3、6.04 6.58 7.10 7.61 8.11 8.6057 - 4.00 4.62 5.23 5.83 6.41 6.99 7.55 8.10 8.63 9.1660 - 4.22 4.88 5.52 6.16 6.78 7.39 7.99 8.58 9.15 9.7163.5 - 4.48 5.18 5.87 6.55 7.21 7.87 8.51 9.14 9.75 10.3668 - 4.81 5.57 6.31 7.05 7.77 8.48 9.17 9.86 10.53 11.1970 - 4.96 5.74 6.51 7.27 8.01 8.75 9.47 10.18 10.8
4、8 11.5673 - 5.18 6.00 6.81 7.60 8.38 9.16 9.91 10.66 11.39 12.1176 - 5.40 6.26 7.10 7.93 8.75 9.56 10.36 11.14 11.91 12.6783 - - 6.86 7.79 8.71 9.62 10.51 11.39 12.26 13.12 13.9689 - - 7.38 8.38 9.38 10.36 11.33 12.28 13.22 14.16 15.0795 - - 7.90 8.98 10.04 11.10 12.14 13.17 14.19 15.19 16.18102 - -
5、 8.50 9.67 10.82 11.96 13.09 14.21 15.31 16.40 17.48108 - - - 10.26 11.49 12.70 13.90 15.09 16.27 17.44 18.59114 - - - 10.85 12.15 13.44 14.72 15.98 17.23 18.47 19.70壁 厚（毫米）2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5外径(毫米)理论重量（公斤/米）121 - - - 11.54 12.93 14.30 15.67 17.02 18.35 19.68 20.99127 - - - 12.13 13.59
6、 15.04 16.48 17.90 19.32 20.72 22.10133 - - - 12.73 14.26 15.78 17.29 18.79 20.28 21.75 23.21140 - - - - 15.04 16.65 18.24 19.83 21.40 22.96 24.51146 - - - - 15.70 17.39 19.06 20.72 22.36 24.00 25.62152 - - - - 16.37 18.13 19.87 21.60 23.32 25.03 26.73159 - - - - 17.15 18.99 20.82 22.64 24.45 26.24
7、28.02168 - - - - - 20.10 22.04 23.97 25.89 27.79 29.69180 - - - - - 21.59 23.70 25.75 27.70 29.87 31.91194 - - - - - 23.31 25.60 27.82 30.00 32.28 34.50203 - - - - - - - 29.14 31.50 33.83 36.16219 - - - - - - - 31.52 34.06 36.60 39.12245 - - - - - - - - 38.23 41.09 43.85273 - - - - - - - - 42.64 45.92 49.10299 - - - - - - - - - - 53.91325 - - - - - - - - - - 58.74
