镀锌管道外径尺寸对照表

镀锌管道是一种表面经过镀锌处理的钢管，具有防蚀和耐磨损的特性，广泛应用于建筑、工业、政等域。其外径尺寸按照家标准GB/T 3091-2015规定。
单位：mm
| 公称通径 (DN) | 壁厚 1.5mm | 壁厚 2.0mm | 壁厚 2.5mm | 壁厚 3.0mm | 壁厚 3.5mm | 壁厚 4.0mm | 壁厚 4.5mm | 壁厚 5.0mm |
|---|---|---|---|---|---|---|---|---|
| 15 | 21.3 | 26.9 | 32.5 | 38.1 | 43.7 | 49.3 | 54.9 | 60.5 |
| 20 | 26.9 | 32.5 | 38.1 | 43.7 | 49.3 | 54.9 | 60.5 | 66.1 |
| 25 | 32.5 | 38.1 | 43.7 | 49.3 | 54.9 | 60.5 | 66.1 | 71.7 |
| 32 | 38.1 | 43.7 | 49.3 | 54.9 | 60.5 | 66.1 | 71.7 | 77.3 |
| 40 | 43.7 | 49.3 | 54.9 | 60.5 | 66.1 | 71.7 | 77.3 | 82.9 |
| 50 | 49.3 | 54.9 | 60.5 | 66.1 | 71.7 | 77.3 | 82.9 | 88.5 |
| 65 | 60.5 | 66.1 | 71.7 | 77.3 | 82.9 | 88.5 | 94.1 | 99.7 |
| 80 | 71.7 | 77.3 | 82.9 | 88.5 | 94.1 | 99.7 | 105.3 | 110.9 |
| 100 | 82.9 | 88.5 | 94.1 | 99.7 | 105.3 | 110.9 | 116.5 | 122.1 |
| 125 | 99.7 | 105.3 | 110.9 | 116.5 | 122.1 | 127.7 | 133.3 | 138.9 |
| 150 | 116.5 | 122.1 | 127.7 | 133.3 | 138.9 | 144.5 | 150.1 | 155.7 |
| 200 | 138.9 | 144.5 | 150.1 | 155.7 | 161.3 | 166.9 | 172.5 | 178.1 |
| 250 | 161.3 | 166.9 | 172.5 | 178.1 | 183.7 | 189.3 | 194.9 | 200.5 |
| 300 | 183.7 | 189.3 | 194.9 | 200.5 | 206.1 | 211.7 | 217.3 | 222.9 |
| 350 | 206.1 | 211.7 | 217.3 | 222.9 | 228.5 | 234.1 | 239.7 | 245.3 |
| 400 | 228.5 | 234.1 | 239.7 | 245.3 | 250.9 | 256.5 | 262.1 | 267.7 |
| 450 | 250.9 | 256.5 | 262.1 | 267.7 | 273.3 | 278.9 | 284.5 | 290.1 |
| 500 | 273.3 | 278.9 | 284.5 | 290.1 | 295.7 | 301.3 | 306.9 | 312.5 |
| 600 | 301.3 | 306.9 | 312.5 | 318.1 | 323.7 | 329.3 | 334.9 | 340.5 |
| 700 | 329.3 | 334.9 | 340.5 | 346.1 | 351.7 | 357.3 | 362.9 | 368.5 |
| 800 | 357.3 | 362.9 | 368.5 | 374.1 | 379.7 | 385.3 | 390.9 | 396.5 |
| 1000 | 396.5 | 402.1 | 407.7 | 413.3 | 418.9 | 424.5 | 430.1 | 435.7 |
| 1200 | 435.7 | 441.3 | 446.9 | 452.5 | 458.1 | 463.7 | 469.3 | 474.9 |
| 1400 | 474.9 | 480.5 | 486.1 | 491.7 | 497.3 | 502.9 | 508.5 | 514.1 |
| 1600 | 514.1 | 519.7 | 525.3 | 530.9 | 536.5 | 542.1 | 547.7 | 553.3 |
注：
表中未列出的尺寸，可根据有关标准查阅或咨询专业士。
外径尺寸允许偏差：
壁厚 ≤ 3.2mm，偏差 ±0.5mm。
壁厚 > 3.2mm，偏差 ±1.0mm。