钢管种类 |
外径(D) |
壁厚(S) | ||
外径尺寸(mm) |
允许偏差(mm) |
外径尺寸(mm) |
允许偏差(mm) | |
热轧管 |
≤101.6 |
+0.4~-0.8 |
76~168.3 |
+28%~0 |
>101.6~168.3 |
+0.4~-1.2 | |||
冷拔管 |
<25.4 |
+0.10 |
≤38.1 |
+20%~0 |
25.4~38.1 |
+0.15 | |||
>38.1~<50.8 |
+0.20 |
>38.1 |
+22%~0 | |
50.8~<63.5 |
+0.25 | |||
63.5~<76.2 |
+0.30 | |||
76.2~101.6 |
+0.38 | |||
>101.6~190.5 |
+0.38~-0.64 | |||
>190.5~228.6 |
+0.38~-1.14 |