| 英国标准BS1378—1985焊接钢管或BS21螺纹钢管 | |||||||||||||||
| 公称直径 | 壁厚（毫米） | 外径（毫米） | 重量（黑管）千克/米 | 螺纹 | |||||||||||
| Nominal Siaze | Wall Thickness | OutsideDiameter（mm） | Weight（Black picpe）kg/m | ||||||||||||
| Max | Min | 参考值 | Thread | ||||||||||||
| 毫米 | 英寸 | A | B | C | A | B | C | A | B | C | A | B | C | 英寸扣数 | 有效长度 |
| mm | inch | ||||||||||||||
| 15 | 1/2 | 2.0 | 2.6 | 3.2 | 21.4 | 21.7 | 21.7 | 21.0 | 21.0 | 21.0 | 0.947 | 1.21 | 1.44 | 14 | 13.2 |
| 20 | 3/4 | 2.3 | 2.6 | 3.2 | 26.9 | 27.2 | 27.2 | 26.4 | 26.6 | 26.6 | 1.38 | 1.56 | 1.87 | 14 | 14.5 |
| 25 | 1 | 2.6 | 3.2 | 4.0 | 33.8 | 34.2 | 34.2 | 33.2 | 33.4 | 33.4 | 1.98 | 2.41 | 2.94 | 11 | 16.8 |
| 32 | 1-1/4 | 2.6 | 3.2 | 4.0 | 42.5 | 42.9 | 42.9 | 41.9 | 42.1 | 42.1 | 2.54 | 3.10 | 3.80 | 11 | 19.1 |
| 40 | 1-1/2 | 2.9 | 3.2 | 4.0 | 48.4 | 48.8 | 48.8 | 47.8 | 48.0 | 48.0 | 3.23 | 3.57 | 4.38 | 11 | 19.1 |
| 50 | 2 | 2.9 | 3.6 | 4.5 | 60.2 | 60.8 | 60.8 | 59.6 | 59.8 | 59.8 | 4.08 | 5.03 | 6.19 | 11 | 23.4 |
| 65 | 2-1/2 | 3.2 | 3.6 | 4.5 | 76.0 | 76.6 | 76.6 | 75.2 | 75.4 | 75.4 | 5.71 | 6.43 | 7.93 | 11 | 26.7 |
| 80 | 3 | 3.2 | 4.0 | 5.0 | 88.7 | 89.5 | 89.5 | 87.9 | 88.1 | 88.1 | 6.72 | 8.37 | 10.30 | 11 | 29.8 |
| 100 | 4 | 3.6 | 4.5 | 5.4 | 113.9 | 114.9 | 114.9 | 113.0 | 113.3 | 113.3 | 9.75 | 12.10 | 14.50 | 11 | 35.8 |
| 125 | 5 | 5.0 | 5.4 | — | 140.6 | 140.6 | — | 138.7 | 138.7 | — | 16.60 | 17.90 | — | — | |
| 150 | 6 | 5.0 | 5.4 | — | 166.1 | 166.1 | — | 164.1 | 164.1 | — | 19.70 | 21.30 | — | — | |
| 备注 | A级管壁厚度允差 -8%；B级、C级管壁厚度允差 -10%； | ||||||||||||||
| A—轻级（棕色带）；B—中级（蓝色带）；C—重级（红色带） | |||||||||||||||
| 中国国家标准GB/T3091—2001焊低压流体输送用（镀锌）接钢管 | |||||||||
| 公称尺寸 | 外径（毫米） | 普通钢管 | 加厚钢管 | ||||||
| 毫米 | 英寸 | 公称尺寸 | 允差 | 壁厚 | 允差 | 理论重量（黑管） | 壁厚 | 允差 | 理论重量（黑管） |
| 15 | 1/2 | 21.3 | ±0.50mm | 2.8 | ±12.5% | 1.28 | 3.5 | ±12.5% | 1.54 |
| 20 | 3/4 | 26.9 | ±0.50mm | 2.8 | ±12.5% | 1.66 | 3.5 | ±12.5% | 2.02 |
| 25 | 1 | 33.7 | ±0.50mm | 3.2 | ±12.5% | 2.41 | 4.0 | ±12.5% | 2.93 |
| 32 | 1-1/4 | 42.4 | ±0.50mm | 3.5 | ±12.5% | 3.36 | 4.0 | ±12.5% | 3.79 |
| 40 | 1-1/2 | 48.3 | ±0.50mm | 3.5 | ±12.5% | 3.87 | 4.5 | ±12.5% | 4.86 |
| 50 | 2 | 60.3 | ±1% | 3.8 | ±12.5% | 5.29 | 4.5 | ±12.5% | 6.19 |
| 65 | 2-1/2 | 76.1 | ±1% | 4.0 | ±12.5% | 7.11 | 4.5 | ±12.5% | 7.95 |
| 80 | 3 | 88.9 | ±1% | 4.0 | ±12.5% | 8.38 | 5.0 | ±12.5% | 10.35 |
| 100 | 4 | 114.3 | ±1% | 4.0 | ±12.5% | 10.88 | 5.0 | ±12.5% | 13.48 |
| 125 | 5 | 139.7 | ±1% | 4.0 | ±12.5% | 13.39 | 5.5 | ±12.5% | 18.20 |
| 150 | 6 | 168.3 | ±1% | 4.5 | ±12.5% | 18.18 | 6.0 | ±12.5% | 24.02 |
| 200 | 8 | 219.1 | ±0.75% | 4.0-6.0 | ±12.5% | — | — | — | — |
| 美国材料试验协会标准ASTM A53—1996黑管和热浸镀锌焊管及无缝钢管 | |||||||
| 公称尺寸 | 外径 | 壁厚 | 重量级别 | 系列号 | A级试验压力 | 黑管重量 | |
| 毫米 | 英寸 | 毫米 | 毫米 | Mpa | kg/m | ||
| 15 | 1/2 | 21.3 | 2.77 | STD | 40 | 4.83 | 1.27 |
| 20 | 3/4 | 26.7 | 2.87 | STD | 40 | 4.83 | 1.69 |
| 25 | 1 | 33.4 | 3.38 | STD | 40 | 4.83 | 2.50 |
| 32 | 1-1/4 | 42.2 | 3.56 | STD | 40 | 8.27 | 3.39 |
| 40 | 1-1/2 | 48.3 | 3.68 | STD | 40 | 8.27 | 4.05 |
| 50 | 2 | 60.3 | 3.91 | STD | 40 | 15.86 | 5.44 |
| 65 | 2-1/2 | 73.0 | 5.16 | STD | 40 | 17.24 | 8.63 |
| 80 | 3 | 88.9 | 5.49 | STD | 40 | 15.31 | 11.29 |
| 100 | 4 | 114.3 | 6.02 | STD | 40 | 13.10 | 16.07 |
| STD为标准重量级 | |||||||
1尺=10寸, 1丈=10尺, 1丈=3.3333333≒3.3米.
1 寸=1/1000丈=3.3/1000米=3.3厘米=33mm
1 寸=1/1000丈=3.3/1000米=3.3厘米=33mm
1英寸=2.54厘米