螺旋钢管 规格及钢管理论重量表 公称 外径 nominal O.D mm 公称壁厚 Nominal Wall Thickness mm 5.0 5.5 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 18.0 20.0 22.0 273 33.04 36.28 39.51 45.92 323.9 39.32 43.18 47.04 54.70 62.32 69.89 (325) 39.46 43.33 47.26 54.90 62.54 70.13 355.6 43.23 47.48 51.73 60.18 68.57 76.92 (377) 45.88 50.39 54.89 63.87 72.80 81.67 406.4 49.44 54.32 59.24 68.94 78.60 88.20 97.75 (426) 51.91