Through a month of nonconforming product statistics of Φ76mm high frequency welded steel pipe unit, We believe that the factors that affect the quality of steel pipe products in the production process include raw materials, welding technology, roll adjustment, roll material, equipment failure, production environment and other reasons, etc. Among them, raw materials, welding technology, roll adjustment are key links, 32.44%, 24.85% and 22.72% respectively, the sum of the three links accounted for 80.01%. And the other four elements of the impact on the quality of steel products accounted for 19.99%, are relatively minor links, including roll material, equipment failure, production environment and other reasons. Therefore, in the high frequency welding process of production, the raw materials, welding technology and roll adjustment three links should be controlled carefully.
Effects of raw material on welding quality of carbon steel pipe
Factors affecting the quality of raw materials mainly include three aspects, the unstable mechanical properties of the steel strip, the surface defects of the strip and the large deviation of geometric size. Therefore, tube manufacturers should control from these three aspects.
Effects of high frequency welding on quality of carbon steel pipe
In the process of high frequency welding of steel pipe, welding technology and the control of process parameters, the position of the sensor and resistor,etc., have a great influence on the weld pipe weld quality.