The large caliber spiral pipe is made of strip steel coil as raw material, usually formed by warm extrusion, and welded by automatic double-wire double-side submerged arc welding process.
The reasons of the wrong side of the spiral pipe: the wrong side often occurs in the production of the spiral pipe, and there are many influencing factors.In production practice, steel pipe is often degraded by dry and wrong side overshoot.Therefore, it is necessary to analyze the causes of the misalignment of spiral steel pipe and its preventive measures.
1. The sickle bend of steel belt is the most important factor causing the wrong side of steel pipe.In the forming of spiral welded pipe, the sickle bend of steel belt will constantly change the forming Angle, resulting in the change of weld clearance, resulting in the opening, the wrong side and even the edge.It seriously affects the quality of steel pipe, so it is an effective way to reduce the wrong side of steel strip sickle bend in the production process to observe the sickle bend situation after unwinding of steel strip.
2. Due to the poor shape and dimension accuracy of the uncut steel head and tail of the large spiral pipe, it is easy to cause hard bending of the steel belt and cause wrong side during docking.
3. When the weld residual height of steel head and tail is large, improper treatment during overforming will easily cause large wrong side.
4. The poor edge condition of the steel belt is another important cause of the wrong edge.
Jinjiang Changjiang Steel pipe Industrial Co., LTD. Specializes in the production and sales of big mouth spiral pipe, Fujian seamless pipe, Fujian spiral pipe and shelf pipe, welcome to inquire: 86-0595-82151777