本文介绍了成都无缝钢管厂12~1/2~″和8~1/2~″周期式轧管机投产以来,通过管坯生产工艺的改进、环形加热炉的修建、采用毛管预压轧工艺、主轧机系列的改造,以及变形分布的优化等技术开发,使轧机产量和产品质量得到提高。目前,产量已超过设计能力30％,可以生产20余种特殊管材,例如 This article describes the Chengdu seamless steel pipe plant 12 ~ 1/2 ~ “and 8 ~ 1/2 ~” cycle mill since the tube, through the tube production process improvements, the ring furnace construction, the use of capillary pre-rolling Technology, the transformation of the main mill series, as well as the optimization of deformation distribution and other technology development, the mill output and product quality has been improved. At present, the output has exceeded 30% of the design capacity and can produce more than 20 kinds of special pipes, for example