我国首台TZ355十二架微张力减径机组日前在太原重型机器厂研制成功。经空运转试车和检测,主要性能参数均达到了设计要求,整机性能可与德国进口的同类设备比美,达到了80年代先进水平。微张力减径机组是钢管生产的关键设备之一,在国外已得到广泛应用,但国内尚处于研究试验阶段。该机组的研制成功,填补了国内一项空白。该机组入口毛管直径分别为85、100、127mm,毛管壁厚为4.5～15mm,毛管最大长 China’s first TZ355 twelve micro stretch tension reduction unit recently in Taiyuan Heavy Machinery Factory successfully developed. Test run by air and test, the main performance parameters have reached the design requirements, the whole performance with similar equipment imported from Germany than the United States, reached the advanced level of the 1980s. Micro tension reducing unit is one of the key equipment for steel pipe production, which has been widely used in foreign countries, but the research is still in the domestic stage. The successful development of the unit, to fill a gap in the country. The unit inlet capillary diameter were 85,100,127mm, capillary wall thickness 4.5 ~ 15mm, the maximum length of capillary