在瑞典冶金工业中优质钢的生产很发达。文中介召了不锈钢螺旋焊管的生产。带钢被送进螺旋焊管机后,自动成螺旋形,并连续进行焊接。焊出的钢管几乎成准确的圆形。若钢管内不产生任何不均匀分布的应力,那钢管完全是平直的,不必象直缝焊管似的需要额外修整(如矫直)。螺旋焊管的另一主要优点是采用冷轧带钢,它的厚度公差大大低于热轧钢板和带钢 The production of high quality steel is well developed in the Swedish metallurgical industry. Wen intermediary called stainless steel spiral welded pipe production. After the strip is fed into the spiral pipe welding machine, it automatically turns into a spiral shape and is continuously welded. Welded steel pipe almost exactly circular. If the pipe does not produce any uneven distribution of stress, then the pipe is completely straight, do not like straight seam welded pipe like the need for additional trimming (such as straightening). Spiral welded pipe Another major advantage is the use of cold-rolled strip, its thickness tolerance is much lower than hot-rolled steel and strip