The influence of the steel belt size

when the strip is less than the width of the allowable deviation, the pressing force is decreased when the welded steel pipe, seam welded steel pipe is not so strong, cracks or open tube; when the width of the strip is greater than the when tolerance, when welded steel pipe extrusion pressure increases, there beak in steel welds, burrs, etc. lap welding or soldering defects. Therefore, the fluctuation strip width, not only affects the accuracy of pipe diameter, and seriously affect the surface quality of steel pipe.

Same section of the request does not exceed the difference in thickness of the steel pipe of a predetermined value, which requires a high degree of uniformity of the pipe wall thickness, the thickness fluctuation of the strip, would allow the values of the same volume is transferred to the wall thickness of the finished steel strip thickness difference exceeds the difference between the, so that a large number of steel thickness exceeds the allowable deviation and sentenced to waste. Fluctuations in the thickness of not only affects the thickness of the finished steel precision, while the strip thickness varies due to make steel during welding, extrusion pressure and welding temperature instability, resulting in unstable weld quality steel welding. In addition, due to the existence of the internal steel sandwich material defects, impurities, such as trachoma, is also a major factor affecting the quality of steel. Therefore, before steel welding, to check each roll strip surface quality and size of the steel quality does not meet the standard requirements, not production, so as to avoid unnecessary losses.