我國從1985年開始該機組的引進，洪都鋼管廠是第一個建設該機組的工廠。引進的是改進型的全浮動三輥軋管機，產品規格范圍從Φ63～80mm。

  所謂的改進型三輥軋管機。其結構上的區別在軋管機入口端的輥頸軸承裝在活動牌坊上，活動牌坊與一液壓缸相連。啟動液壓缸可按要求快速改變軋輥的喂人角。因為軋制薄壁管的主要問題在毛管的尾端，改進型三輥軋管機的解決辦法是在毛管尾端產生一小段壁厚較厚的毛管，以便給相鄰的薄壁管以足夠的支撐。這種解決辦法是這樣實現的。開始時，軋機的喂入角調整得較小，當毛管前端通過軋輥后，迅速將喂入角調大，然后，當軋至毛管后端時，又重新快速將喂人角調小。由于軋輥軸安裝的幾何關系，減小軋機喂入角不僅改變喂入效率，而且可打開輥喉，所以就產生一小段厚壁管。

  傳(chuan)統的(de)(de)Assel軋(ya)管機(ji)采用1個電機(ji)傳(chuan)動，通過齒(chi)輪箱帶動3個軋(ya)輥(gun)。雖然(ran)軋(ya)輥(gun)的(de)(de)速度相同，但(dan)由于軋(ya)輥(gun)上的(de)(de)負荷分配不(bu)均。導致軋(ya)制時荒管壁厚(hou)不(bu)均和后端(duan)不(bu)圓。由于尾(wei)三(san)角的(de)(de)原因，只(zhi)能生(sheng)產產D／SS不(bu)大(da)于12的(de)(de)鋼管。

  Assel軋(ya)(ya)(ya)(ya)(ya)(ya)管(guan)(guan)機(ji)組(zu)經過(guo)(guo)近一個世(shi)紀的(de)(de)(de)(de)發展(zhan)之(zhi)(zhi)后(hou)，軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)鋼(gang)(gang)管(guan)(guan)的(de)(de)(de)(de)直徑(jing)(jing)不斷加大(da)。這使(shi)得(de)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)變得(de)越(yue)來越(yue)重(zhong)。由此(ci)而(er)產(chan)生的(de)(de)(de)(de)問題是，笨(ben)重(zhong)的(de)(de)(de)(de)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)重(zhong)達(da)數(shu)噸，給芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)操作和運輸帶來了很大(da)困難，并且直接影響到軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)鋼(gang)(gang)管(guan)(guan)的(de)(de)(de)(de)質(zhi)量。芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)重(zhong)量在某種程(cheng)度(du)上制(zhi)(zhi)(zhi)(zhi)約(yue)了大(da)直徑(jing)(jing)鋼(gang)(gang)管(guan)(guan)的(de)(de)(de)(de)生產(chan)。經過(guo)(guo)一段(duan)時間的(de)(de)(de)(de)摸索(suo)之(zhi)(zhi)后(hou)。當今限(xian)(xian)動(dong)(dong)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)Assel 軋(ya)(ya)(ya)(ya)(ya)(ya)管(guan)(guan)機(ji)組(zu)可以滿足大(da)直徑(jing)(jing)鋼(gang)(gang)管(guan)(guan)的(de)(de)(de)(de)生產(chan)。限(xian)(xian)動(dong)(dong)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)Assel軋(ya)(ya)(ya)(ya)(ya)(ya)管(guan)(guan)機(ji)的(de)(de)(de)(de)技術特點是在軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)過(guo)(guo)程(cheng)中控(kong)制(zhi)(zhi)(zhi)(zhi)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)前(qian)(qian)進(jin)(jin)速(su)度(du)，使(shi)荒管(guan)(guan)的(de)(de)(de)(de)前(qian)(qian)進(jin)(jin)速(su)度(du)大(da)于(yu)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)前(qian)(qian)進(jin)(jin)速(su)度(du)，芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)前(qian)(qian)進(jin)(jin)距(ju)離遠(yuan)遠(yuan)小于(yu)荒管(guan)(guan)的(de)(de)(de)(de)前(qian)(qian)進(jin)(jin)距(ju)離。根據(ju)限(xian)(xian)動(dong)(dong)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)上述軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)特點，便可根據(ju)生產(chan)需要確定芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)長度(du)，并通過(guo)(guo)減(jian)少軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)長度(du)的(de)(de)(de)(de)方法來縮短芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)長度(du)，從而(er)減(jian)輕芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)重(zhong)量。對Assel軋(ya)(ya)(ya)(ya)(ya)(ya)管(guan)(guan)機(ji)的(de)(de)(de)(de)實驗研究分析(xi)表明，浮動(dong)(dong)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)與(yu)(yu)(yu)限(xian)(xian)動(dong)(dong)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)之(zhi)(zhi)間有(you)(you)很大(da)差別，相比之(zhi)(zhi)下限(xian)(xian)動(dong)(dong)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)具(ju)有(you)(you)更多優點：首(shou)先，取消了荒管(guan)(guan)與(yu)(yu)(yu)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)之(zhi)(zhi)間的(de)(de)(de)(de)脫棒(bang)(bang)(bang)(bang)(bang)系統，不僅減(jian)少了設(she)備的(de)(de)(de)(de)投入(ru)，還由于(yu)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)不參與(yu)(yu)(yu)運輸而(er)使(shi)得(de)軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)大(da)直徑(jing)(jing)的(de)(de)(de)(de)鋼(gang)(gang)管(guan)(guan)成為可能；其(qi)次，可減(jian)小附加應力，增大(da)減(jian)徑(jing)(jing)量，保證(zheng)了軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)的(de)(de)(de)(de)質(zhi)量。

  大直徑Assel軋(ya)管機組(zu)上采(cai)用單(dan)獨直接傳(chuan)動。這(zhe)一結構的(de)(de)(de)優(you)點是(shi)，可以(yi)(yi)騰出(chu)更多的(de)(de)(de)空(kong)間(jian)來布(bu)置(zhi)出(chu)口臺(tai)，以(yi)(yi)生產大直徑的(de)(de)(de)鋼管；可以(yi)(yi)用改變每個軋(ya)輥速度(du)的(de)(de)(de)方法來補償由(you)于(yu)負荷分配不(bu)(bu)均而引起的(de)(de)(de)軋(ya)制(zhi)速度(du)的(de)(de)(de)差(cha)異，并(bing)能補償軋(ya)輥外徑不(bu)(bu)完全(quan)相等的(de)(de)(de)差(cha)異。軋(ya)輥采(cai)用單(dan)獨傳(chuan)動，并(bing)且為軸向出(chu)料直接進入定(ding)徑機，中(zhong)間(jian)不(bu)(bu)設置(zhi)再加熱(re)爐，這(zhe)些都是(shi)當今Assel軋(ya)管機組(zu)的(de)(de)(de)獨特之處。