以下是45#精密无缝管的一些常见直径尺寸对照表，仅供参考：
| 外径 (mm) | 壁厚 (mm) |
|---|---|
| 10 | 2 |
| 14 | 2, 3 |
| 18 | 3 |
| 19 | 2, 2.75, 3 |
| 20 | 2 |
| 22 | 2, 2.5, 3, 3.5, 4 |
| 25 | 2, 2.5, 3, 3.5, 4 |
| 28 | 2.5, 3, 3.5, 4, 4.5 |
| 30 | 3 |
| 32 | 2, 2.5, 3 |
| 38 | 4.5, 5, 6 |
| 40 | 2, 3.5 |
| 42 | 3, 3.5, 4, 4.5, 5 |
| 45 | 2.5, 3, 3.5, 4, 4.5, 5, 6 |
| 48 | 3, 3.5, 4 |
| 51 | 3, 3.2, 3.5, 4, 4.5, 5, 6 |
| 53 | 1.1, 1.2, 1.5, 6, 12, 14 |
| 54 | 3.5 |
| 56 | 1.8, 3, 5, 6, 7, 8, 9 |
| 57 | 1.5, 3, 5, 6, 7, 8, 9, 10, 12, 14, 15 |
| 58 | 1.8, 6, 11 |
| 60 | 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 7, 7.5, 8, 9, 10, 11, 12 |
| 63.5 | 3, 3.5, 4, 4.5, 5, 6, 9, 10 |
| 68 | 4, 6 |
| 70 | 3, 3.5, 4, 4.5, 5, 6, 8, 9, 10 |
| 73 | 3.5, 4, 4.5, 5, 5.5, 7 |
| 75 | 6 |
| 76 | 3.5, 4, 4.5, 5, 6, 10, 11, 12.5, 14, 15, 16 |
| 80 | 3, 4, 4.5, 5, 6, 7.5, 8, 10, 12, 14, 16, 18, 20 |
| 83 | 4.5, 5, 10, 12, 14, 16, 18, 20, 22, 25 |
| 89 | 4, 4.5, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, 22, 25 |
| 95 | 4.5, 5, 6, 7, 8, 9, 10, 11, 12, 14, 16, 20 |
| 102 | 4, 4.5, 5, 5.5, 6, 7, 8, 10, 12, 14, 16, 20 |
| 108 | 4, 4.5, 5, 5.5, 6, 7, 7.5, 8, 9, 10, 11, 12, 12.5, 14, 16, 18, 20, 22, 25, 28, 30 |
| 114 | 4, 4.5, 5, 5.5, 6, 6.5, 7, 8, 9, 10, 11, 12, 14, 15, 16 |
| 121 | 4.5, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20 |
| 127 | 4.5, 5, 5.5, 6, 7, 7.5, 8, 9, 10, 12, 14, 16, 18, 20 |
| 133 | 4.5, 5, 6, 6.5, 7, 8, 9, 10, 11, 12, 12.5, 14, 15, 16 |
| 140 | 5, 6, 7, 8, 9, 10, 11, 12, 14, 16, 18, 20, 22 |
| 146 | 4.5, 6, 8, 12, 14, 16, 18, 20, 22, 25, 30 |
| 152 | 4.5, 6, 8, 12, 14, 16, 18, 20, 22, 25, 28, 30, 32, 35, 36 |
| 159 | 4.5, 5, 5.5, 6, 6.5, 7, 8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 25, 28, 30, 32, 35 |
| 168 | 6, 6.5, 7, 8, 10, 12, 14, 16, 18, 20, 22, 25, 28, 30, 32, 35, 38, 40 |
| 180 | 6, 8, 12, 16, 20, 25, 30, 32, 34, 38, 40 |
| 194 | 6, 8, 12, 16, 20, 22, 25, 28, 30, 32, 35, 38, 40 |
| 203 | 6, 7, 10, 15, 20, 25, 30, 32, 36, 40 |
| 219 | 6, 8, 12, 14, 16, 18, 20, 25, 30, 32, 36, 40 |
| 245 | 8, 10, 14, 17, 20, 22, 25, 28, 30, 32, 34, 35, 40 |
| 273 | 7, 9, 12, 15, 18, 20, 25, 30, 32, 35, 38, 40 |
| 299 | 8, 12, 16, 20, 22, 24, 25, 28, 30, 32, 36, 38, 40 |
| 325 | 8, 12, 14, 18, 38 |
| 351 | 10, 16, |
