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承插活接头由圆钢或钢锭模锻成型后机加工的管道连接件，它的连接形式分承插焊接，承插焊接是将钢管插入承插孔内进行焊接，因此，被称为“承插活接头”，主要制造标准为ASME B16.11、MSS SP 83。承插活接头的品种有等径和异径。
承插活接头由插口、承口、承插槽等组成，其特征在于在插口上有承插槽，插口、承口分别位于两端；与现有技术相比，、操作简单、，提高操作质量与便捷性。
承插活接头可广泛应用于不同口径的管道，也可用于水表、阀门。由于采用承插结构，使得管道接头降低了成本、安装、使用、维修极为方便，同时还有 的防漏能力，极有市场前景。
| 公称通径 Nominal Diameter |
类型 Type |
SD | A | Cmin | SL | RL | 插口直径 Diameter of faucet |
插口 The deepness of faucet |
孔径 Diameter of Hole (D) |
|||||||
| DN | NPS | 3000 LB Sch80 |
6000 LB Sch160 |
3000 LB Sch80 |
6000 LB Sch160 |
3000 LB Sch80 |
6000 LB Sch160 |
3000 LB Sch80 |
6000 LB Sch160 |
3000 LB Sch80 |
6000 LB Sch160 |
B | J | 3000 LB Sch80 |
6000 LB Sch160 |
|
| 10×8 | 3/8×1/4 | 1 | 1 | 17.1 | 19 | 21 | 3.8 | 4.6 | 14 | 16 | - | - | 14.2 | 10 | 9.0 | 6.5 |
| 15×10 | 1/2×3/8 | 1 | 1 | 21.3 | 21 | 23 | 4.0 | 5.0 | 16 | 16 | - | - | 17.7 | 10 | 12.5 | 9.0 |
| 15×8 | 1/2×1/4 | 2 | 1 | 21.3 | 21 | 21 | 3.8 | 4.6 | 16 | 16 | - | - | 14.2 | 10 | 9.0 | 6.0 |
| 20×15 | 3/4×1/2 | 1 | 1 | 26.7 | 22 | 25 | 4.7 | 6.0 | 17 | 19 | - | - | 21.8 | 10 | 16.0 | 11.5 |
| 20×10 | 3/4×3/8 | 2 | 1 | 26.7 | 16 | 22 | 4.0 | 5.0 | - | 19 | 21 | - | 17.7 | 10 | 12.5 | 9.0 |
| 20×8 | 3/4×1/4 | 2 | 2 | 26.7 | 18 | 22 | 3.8 | 4.6 | - | - | 21 | 32 | 14.2 | 10 | 9.0 | 6.5 |
| 25×20 | 1×3/4 | 1 | 1 | 33.4 | 24 | 28 | 4.9 | 7.0 | 19 | 21 | - | - | 27.2 | 13 | 21.0 | 15.5 |
| 25×15 | 1×1/2 | 2 | 2 | 33.4 | 16 | 28 | 4.7 | 6.0 | - | 21 | 28 | - | 21.8 | 10 | 16.0 | 11.5 |
| 25×10 | 1×3/8 | 2 | 2 | 33.4 | 18 | 22 | 4.0 | 5.0 | - | - | 28 | 33 | 17.7 | 10 | 12.5 | 9.0 |
| 25×8 | 1×1/4 | 2 | 2 | 33.4 | 19 | 24 | 3.8 | 4.6 | - | - | 28 | 33 | 14.2 | 10 | 9.0 | 6.0 |
| 32×25 | 1.1/4×1 | 1 | 1 | 42.4 | 25 | 30 | 5.7 | 7.9 | 21 | 22 | - | - | 33.9 | 13 | 26.5 | 20.5 |
| 32×20 | 1.1/4×3/4 | 2 | 2 | 42.4 | 18 | 21 | 4.9 | 7.0 | - | - | 32 | 35 | 27.2 | 13 | 21.0 | 15.5 |
| 32×15 | 1.1/4×1/2 | 2 | 2 | 42.4 | 19 | 22 | 4.7 | 6.0 | - | - | 32 | 35 | 21.8 | 10 | 16.0 | 11.5 |
| 32×10 | 1.1/4×3/8 | 2 | 2 | 42.4 | 21 | 24 | 4.0 | 5.0 | - | - | 32 | 35 | 17.7 | 10 | 12.5 | 9.0 |
| 32×8 | 1.1/4×1/4 | 2 | 2 | 42.4 | 22 | 25 | 3.8 | 4.6 | - | - | 32 | 35 | 14.2 | 10 | 9.0 | 6.0 |
| 40×32 | 1.1/2×1.1/4 | 1 | 1 | 48.3 | 28 | 35 | 6.1 | 7.9 | 22 | 25 | - | - | 42.7 | 13 | 35.0 | 29.5 |
| 40×25 | 1.1/2×1 | 2 | 1 | 48.3 | 18 | 29 | 5.7 | 7.9 | - | 25 | 33 | - | 33.9 | 13 | 26.5 | 20.5 |
| 40×20 | 1.1/2×3/4 | 2 | 2 | 48.3 | 19 | 25 | 4.9 | 7.0 | - | - | 33 | 40 | 27.2 | 13 | 21.0 | 15.5 |
| 40×15 | 1.1/2×1/2 | 2 | 2 | 48.3 | 21 | 27 | 4.7 | 6.0 | - | - | 33 | 40 | 21.8 | 10 | 16.0 | 11.5 |
| 40×10 | 1.1/2×3/8 | 2 | 2 | 48.3 | 22 | 28 | 4.0 | 5.0 | - | - | 33 | 40 | 17.7 | 10 | 12.5 | 9.0 |
| 50×40 | 2×1.1/2 | 1 | 1 | 60.3 | 32 | 47 | 6.4 | 8.9 | 25 | 40 | - | - | 48.8 | 13 | 41.0 | 34.0 |
| 50×32 | 2×1.1/4 | 2 | 2 | 60.3 | 21 | 24 | 6.1 | 7.9 | - | - | 38 | 41 | 42.7 | 13 | 35.0 | 29.5 |
| 50×25 | 2×1 | 2 | 2 | 60.3 | 22 | 25 | 5.7 | 7.9 | - | - | 38 | 41 | 33.9 | 13 | 26.5 | 21.0 |
| 50×20 | 2×3/4 | 2 | 2 | 60.3 | 24 | 27 | 4.9 | 7.0 | - | - | 38 | 41 | 27.2 | 13 | 21.0 | 15.5 |
| 50×15 | 2×1/2 | 2 | 2 | 60.3 | 25 | 28 | 4.7 | 6.0 | - | - | 38 | 41 | 21.8 | 10 | 16.0 | 11.5 |
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