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16mn厚壁鋼管402壁厚30mm無縫鋼管寶鋼產無錫價格
16mn厚壁鋼管402壁厚30mm無縫鋼管寶鋼產無錫價格
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鋼管重量公式:[(外徑-壁厚)*壁厚]*0.02466=kg/米(每米的重量)
16mn厚壁鋼管尺寸及允許偏差
|
偏差等級 |
標準化外徑允許偏差 |
|
D1 |
±1.5%，最小±0.75 mm |
|
D2 |
±1.0%。最小±0.50 mm |
|
D3 |
±0.75%．最小±0.30 mm |
|
D4 |
±0.50%。最小±0.10 mm |
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