| 公称通径Dg | 钢管外径 （mm） | 接头连接螺纹 （mm） | 公称压力pg/MPa | 推荐流量 （L/min） | |||||||
| ≤2.5 | ≤8 | ≤16 | ≤25 | ≤31.5 | |||||||
| mm | in | 钢管壁厚/mm | |||||||||
| 3 | 6 | GB/T7306 | 1 | 1 | 1 | 1 | 1.4 | 0.63 | |||
| 4 | 8 | 外经和牙数 | 1 | 1 | 1 | 1.4 | 1.4 | 2.5 | |||
| 5；6 | 1/8 | 10 | M10×1 | 9.728×28 | 1 | 1 | 1 | 1.6 | 1.6 | 6.3 | |
| 8 | 1/4 | 14 | 13.5 | M14×1.5 | 13.157×19 | 1 | 1 | 1.6 | 2 | 2 | 25 |
| 10；12 | 3/8 | 18 | 17 | M18×1.5 | 16.662×19 | 1 | 1.6 | 1.6 | 2 | 2.5 | 40 |
| 15 | 1/2 | 22 | 21.3 | M22×1.5 | 20.955×14 | 1.6 | 1.6 | 2 | 2.5 | 3 | 63 |
| 20 | 3/4 | 28 | 26.8 | M27×2 | 26.441×14 | 1.6 | 2 | 2.5 | 3.5 | 4 | 100 |
| 25 | 1 | 34 | 33.5 | M33×2 | 33.249×11 | 2 | 2 | 3 | 4.5 | 5 | 160 |
| 32 | 1 1/4 | 42 | 42.3 | M42×2 | 41.910×11 | 2 | 2.5 | 4 | 5 | 6 | 250 |
| 40 | 1 1/2 | 50 | 48 | M48×2 | 47.803×11 | 2.5 | 2 | 4.5 | 5.5 | 7 | 400 |
| 50 | 2 | 63 | 60 | M60×2 | 59.614×11 | 3 | 3.5 | 5 | 6.5 | 8.5 | 630 |
| 65 | 2 1/2 | 75 | 75.5 | M75×2 | 75.148×11 | 3.5 | 4 | 6 | 8 | 10 | 1000 |
| 80 | 3 | 90 | 88.5 | 87.884×11 | 4 | 5 | 7 | 10 | 12 | 1250 | |
| 100 | 4 | 120 | 114 | 113.030×11 | 5 | 6 | 8.5 | 2500 | |||
| 125 | 5 | 140 | 138.430×11 | ||||||||
| 150 | 6 | 165 | 163.830×11 | ||||||||
