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板卷焊管

板卷焊管

厚壁板卷鋼管一般指壁厚45mm以上的板卷鋼管，由于鋼板壁厚的增加強(qiáng)度及硬度隨著增加，如果還用冷卷辦法就容易造成原材料拉傷，出現(xiàn)裂痕等跡象，該厚壁鋼管就要采用熱卷方法，把鋼...

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