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螺旋埋弧焊钢管内焊缝裂纹是本行业多年未解决的问题。从焊缝结晶冷却收缩应力和变形张应力两个方面着重分析了裂纹产生的机理和防止方法，并提出了解决措施。
Spiral submerged arc welded pipe cracks in the pipe is the industry for many years unresolved issues. From the aspects of cooling shrinkage stress and deformation tensile stress of the weld crystal, the mechanism and prevention method of cracks are analyzed emphatically, and the solutions are proposed.