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外徑和壁厚允許偏差見下表(冷拔)
類別 |
鋼管尺寸 |
允許偏差 | |
外徑允許偏差 |
<25 |
±0.10mm | |
≥25--<40 |
±0.15mm | ||
≥40--<50 |
±0.20mm | ||
≥50--<60 |
±0.25mm | ||
≥60--<80 |
±0.30mm | ||
≥80--<100 |
±0.40mm | ||
≥100--<120 |
+0.40mm/-0.60mm | ||
≥120--<160 |
+0.40mm/-0.80mm | ||
≥160--<200 |
+0.40mm/-1.20mm | ||
≥200 |
+0.40mm/-1.60mm | ||
壁厚的允許偏差 |
|
外徑<40 |
外徑≥40 |
S<2 |
+0.40mm/-0 |
| |
≥2 |
+20%/-0 |
+22%/-0 |