钢管种类
|
钢管尺寸
|
允许偏差
|
||
普通级
|
高 级
|
|||
热轧(挤压、扩)管
|
外径D
|
全部
|
±1%(最小±0.50)
|
|
壁厚S
|
全部
|
+15% 小+0.45
-12.5% -0.40
|
||
冷拔(轧)管
|
外径D
|
6-10
|
±0.20
|
±0.15
|
>10-30
|
±0.40
|
±0.20
|
||
>30-50
|
±0.45
|
±0.30
|
||
>50
|
±1%
|
±0.8%
|
||
壁厚s
|
≤1
|
±0.15
|
±0.12
|
|
>1-3
|
+15%
-10%
|
+12.5%
-10%
|
||
>3
|
+12.5%
-10%
|
±10%
|
89×4.5-8-10-12-14-16-18-20
|
273×7-9-12-15-18-20-25
|
95×4.5-6-8-10-12-14-16-20
|
273×30-35-38-40-45-50
|
102×4.5-5-6-7-8-10-12-14-16-20
|
299×8-12-16-20-24-28
|
108×4.5-5-6-7-8-10-12-14-18-20-22
|
299×30-32-36-38-40-45
|
114×4.5-5-6-7-8-10-12-14-18-20
|
325×8-12-14-18-38-42
|
121×4.5-5-6-7-8-10-12-14-16-20
|
325×28-32-34-38-42
|
127×4.5-5-6-7-8-10-12-14-16-20
|
351×10-16-20-25-40
|
133×4.5-6-8-12-14-16-18-20-25-30
|
355×6-18-20-25-30-40/52
|
140×5-6-7-8-9-10-12-14-16-20-22
|
377×8-12-15-20-24-28
|