由于苏联尼科波利南方钢管厂的30-102连轧管机组的轧制速度高(每小时轧400根钢管),而现行的管坯定心方法太浪费时间,所以不能采用。又因管坯在加热过程中出现扭曲或切端头时出现端部局部变形,所以就不能使用定心装置的冲头来定心,否则将会导致中心孔偏心、使定心工序作用不大。而不定心又会导致荒管和成品管前端的横向壁厚差太大,从而使切头损失增大。在生产直径83～102mm的 Due to the high rolling speed (400 steel pipes per hour) of the 30-102 pipe mill unit at the southern Nicopolis Pipe Plant in the Soviet Union, the current pipe centering method is a waste of time and can not be used. Because of the tube in the heating process appears distorted or cut ends appear when the end of the local deformation, so you can not use the centering device punch centering, otherwise it will lead to center hole eccentricity, so that the role of centering process is not. Undeterminacy will lead to shortage of crude pipe and finished pipe front-end horizontal wall thickness difference is too large, so that cut loss increases. In the production of diameter 83 ~ 102mm