Spiral steel pipe is a strip of steel coil as raw material, often temperature extrusion city pressure, according to the spiral shape of the bending molding, automatic double-wire double-sided submerged arc welding process for the inner seam and outer seam welded spiral seam steel pipe. Raw materials, namely strip coil, welding wire, flux.
Spiral steel pipe in the production, the wrong side occurs from time to time, and its impact on many factors. In production practice, often by the dry edge of the wrong super poor and make the steel pipe degradation. Therefore, it is necessary to analyze the causes of spiral steel pipe wrong edge and its preventive measures.
The sickle bend of the steel strip is the most important factor causing the wrong edge of the steel pipe. In the spiral steel pipe molding, the sickle bend of the steel strip will continue to change the molding angle, resulting in changes in the weld gap, resulting in open seams, wrong side or even overlap. Seriously affect the quality of steel pipe.
The poor condition of the edge of the steel strip is another important reason for the wrong edge.
As a result of not cutting the edge of the steel strip head and tail of the shape and size of the poor precision, docking is easy to cause hard bending of the steel strip and caused by the wrong edge.
Steel strip head and tail butt welding weld margin height is large, in the molding if not properly handled, easy to cause a large misalignment.
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