鋼管種類 |
鋼管外徑(D) |
鋼管壁厚(S) |
| |
管體 |
鋼管外徑 (mm) |
允許偏差(mm) |
鋼管外徑(mm) |
允許偏差(mm) |
≥60.3且S<20 |
±0.75% |
≤73.0 |
+15%,-12.5% |
|
≥60.3且S≥20 |
±1.00% |
>73.0且S<20 |
+15%,-12.5% |
|
|
|
>73.0且S≥20 |
+17.5%,-10 |
|
外徑216mm壁厚8mm精密無縫鋼管每米重量是多少?