外径D /mm 壁厚S/mm 3.0 3.25 3.5 3.75 4.O 4.5 5.0 5.5 6.0 7.O 8.0 10.0 12.O 理论质量/(kg/m) 48 3.33 3.59 3.84 4.09 4.43 4.83 5.30 60 4.22 4.55 4.88 5.20 5.52 6.16 6.78 7.39 7.99 76 5.40 5.83 6.26 6.68 7.10 7.93 8.75 9.58 lO.36 11.9l 89 6.36 6.87 7.38 7.88 8.38 9.38 10.36 11.33 12.28 14.15 102 7.32 7.9l 8.50 9.09 9.67 10.82 11.96 13.09 14.20 16.40 114 8.2l 8.88 9.54 10.19 10.85 12.15 13.44 14.72 15.98 18.47 140 11.78 12.60 13.42 15.04 16.65 18.24 19.83 22.96 159 13.42 14.36 15.29 17.14 18.99 20.82 22.64 26.24 168 14.20 15.19 16.18 18.14 20.10 22.04 23.97 27.79 3l.56 194 18.74 21.03 23.30 25.57 27.82 32.28 36.69 219 21.21 23.80 26.39 28.96 31.52 36.60 41.63 245 23.77 26.69 29.59 32.48 35.36 41.08 46.76 273 26.53 29.80 33.04 36.28 39.51 45.92 52.28 324 31.56 35.45 39.33 43.20 47.05 54.72 62.34 355.5 38.95 43.22 47.47 51.7l 60.16 68.55 377 41.37 45.87 50.39 54.89 63.87 72.80 406.5 44.60 49.50 54.39 59.26 68.96 78.62 97.78 457 55.73 61.24 66.73 77.68 88.58 110.23 508 68.15 74.28 86.48 98.64 122.8l 146.78

倍尺长度应在通常长度范围内，每个倍尺间应留出5-10mm的切口余量，钢管全长的答应偏差为+20mm。

外 径 外径答应偏差 壁 厚 壁厚答应偏差 D114 ±O.8%

厚答应偏差