| 公称通经 DN |
钢管外径 DW(mm) |
塑覆铜管外径(mm) |
外径允许偏差(mm) |
塑覆壁厚(mm) |
塑覆层允许偏差(mm) |
齿数 |
||
| 齿型环 |
平形环 |
齿型环 |
平形环 |
|||||
| 15 |
15 |
18.60 |
17.60 |
±0.25 |
1.80 |
1.30 |
±0.20 |
16-25 |
| 20 |
22 |
25.60 |
24.60 |
±0.25 |
1.80 |
1.30 |
±0.20 |
20-30 |
| 25 |
28 |
31.60 |
30.60 |
±0.25 |
1.80 |
1.30 |
±0.20 |
20-30 |
| 32 |
35 |
40.00 |
38.60 |
±0.30 |
2.50 |
1.80 |
±0.25 |
28-35 |
| 40 |
42 |
47.00 |
45.60 |
±0.30 |
2.50 |
1.80 |
±0.25 |
32-42 |
| 50 |
54 |
60.00 |
58.00 |
±0.40 |
3.00 |
2.00 |
±0.30 |
42-52 |
