目前,世界上先进的无缝钢管轧机首推限动芯棒连轧管机组,但这种机组产量高、设备多、技术复杂、投资大、建设周期长,用来改造我国现有的中小型无缝钢管机组,显然不合适。因此可供选择的先进机型不外乎是CPE、PSW和Accu-Roll。CPE机组虽有延伸机延伸系数大(6～9)、出口速度快(6m/s以上)等优点,但致命弱点是成材率低;PSW机组虽然是有发展前途的 At present, the world’s most advanced seamless tube rolling mills devaluation mandrel rolling mill unit, but this unit output, equipment, complex technology, large investment, long construction period, used to transform our existing small and medium sized Seamless steel tube unit, apparently not suitable. Therefore, the choice of advanced models are nothing more than CPE, PSW and Accu-Roll. Although the extension of CPE unit extension coefficient (6 ~ 9), the exit speed (6m / s or more) and other advantages, but the fatal weakness is a low yield; PSW although there is a promising development