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。

  傳統的(de)(de)Assel軋(ya)(ya)管機(ji)(ji)采(cai)用1個(ge)電機(ji)(ji)傳動(dong)，通(tong)過齒輪(lun)箱帶動(dong)3個(ge)軋(ya)(ya)輥。雖然軋(ya)(ya)輥的(de)(de)速度相同(tong)，但由于軋(ya)(ya)輥上的(de)(de)負荷(he)分(fen)配(pei)不(bu)均(jun)。導致(zhi)軋(ya)(ya)制時荒管壁(bi)厚不(bu)均(jun)和后(hou)端不(bu)圓。由于尾三角的(de)(de)原因，只(zhi)能生產(chan)產(chan)D／SS不(bu)大于12的(de)(de)鋼管。

  Assel軋(ya)(ya)(ya)管(guan)(guan)(guan)(guan)(guan)機(ji)(ji)組經過(guo)(guo)近(jin)一個世紀(ji)的(de)(de)(de)(de)(de)發(fa)展之(zhi)(zhi)(zhi)(zhi)后，軋(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)鋼管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)直(zhi)徑不(bu)斷加(jia)大(da)(da)(da)(da)(da)。這(zhe)使得(de)(de)芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)變得(de)(de)越(yue)來越(yue)重(zhong)。由(you)(you)此而產生的(de)(de)(de)(de)(de)問(wen)題是，笨重(zhong)的(de)(de)(de)(de)(de)芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)重(zhong)達數噸(dun)，給芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)操(cao)作和運(yun)輸帶來了(le)很大(da)(da)(da)(da)(da)困難，并且直(zhi)接(jie)影響到軋(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)鋼管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)質(zhi)量(liang)。芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)重(zhong)量(liang)在某種程度(du)(du)上(shang)制(zhi)(zhi)(zhi)(zhi)約了(le)大(da)(da)(da)(da)(da)直(zhi)徑鋼管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)生產。經過(guo)(guo)一段時(shi)間的(de)(de)(de)(de)(de)摸(mo)索之(zhi)(zhi)(zhi)(zhi)后。當今限動芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)Assel 軋(ya)(ya)(ya)管(guan)(guan)(guan)(guan)(guan)機(ji)(ji)組可以(yi)滿足(zu)大(da)(da)(da)(da)(da)直(zhi)徑鋼管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)生產。限動芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)Assel軋(ya)(ya)(ya)管(guan)(guan)(guan)(guan)(guan)機(ji)(ji)的(de)(de)(de)(de)(de)技術特(te)點是在軋(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)過(guo)(guo)程中控制(zhi)(zhi)(zhi)(zhi)芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)前進(jin)速度(du)(du)，使荒管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)前進(jin)速度(du)(du)大(da)(da)(da)(da)(da)于(yu)芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)前進(jin)速度(du)(du)，芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)前進(jin)距(ju)離遠遠小(xiao)于(yu)荒管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)前進(jin)距(ju)離。根據(ju)限動芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)上(shang)述軋(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)特(te)點，便可根據(ju)生產需要確(que)定芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)軋(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)長度(du)(du)，并通過(guo)(guo)減(jian)少軋(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)長度(du)(du)的(de)(de)(de)(de)(de)方法來縮(suo)短(duan)芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)長度(du)(du)，從(cong)而減(jian)輕芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)重(zhong)量(liang)。對Assel軋(ya)(ya)(ya)管(guan)(guan)(guan)(guan)(guan)機(ji)(ji)的(de)(de)(de)(de)(de)實驗研究分析(xi)表明，浮動芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)軋(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)與(yu)限動芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)軋(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)之(zhi)(zhi)(zhi)(zhi)間有很大(da)(da)(da)(da)(da)差別，相比之(zhi)(zhi)(zhi)(zhi)下限動芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)軋(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)具(ju)有更多優點：首(shou)先(xian)，取消了(le)荒管(guan)(guan)(guan)(guan)(guan)與(yu)芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)之(zhi)(zhi)(zhi)(zhi)間的(de)(de)(de)(de)(de)脫棒(bang)(bang)(bang)(bang)系統，不(bu)僅減(jian)少了(le)設(she)備的(de)(de)(de)(de)(de)投入，還由(you)(you)于(yu)芯(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)不(bu)參與(yu)運(yun)輸而使得(de)(de)軋(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)大(da)(da)(da)(da)(da)直(zhi)徑的(de)(de)(de)(de)(de)鋼管(guan)(guan)(guan)(guan)(guan)成為可能；其次，可減(jian)小(xiao)附加(jia)應力，增大(da)(da)(da)(da)(da)減(jian)徑量(liang)，保證(zheng)了(le)軋(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)質(zhi)量(liang)。

  大直(zhi)徑(jing)Assel軋(ya)管(guan)(guan)機組(zu)上采(cai)(cai)用單(dan)獨(du)直(zhi)接傳(chuan)動。這一(yi)結構的(de)(de)優點(dian)是(shi)，可(ke)以騰(teng)出更多(duo)的(de)(de)空間來布(bu)置出口臺，以生(sheng)產(chan)大直(zhi)徑(jing)的(de)(de)鋼管(guan)(guan)；可(ke)以用改變(bian)每個軋(ya)輥(gun)速度(du)的(de)(de)方法(fa)來補償由于負荷(he)分配不均而引起(qi)的(de)(de)軋(ya)制速度(du)的(de)(de)差異，并能補償軋(ya)輥(gun)外徑(jing)不完全相(xiang)等的(de)(de)差異。軋(ya)輥(gun)采(cai)(cai)用單(dan)獨(du)傳(chuan)動，并且為(wei)軸向(xiang)出料直(zhi)接進入定徑(jing)機，中間不設置再加(jia)熱爐，這些(xie)都是(shi)當今Assel軋(ya)管(guan)(guan)機組(zu)的(de)(de)獨(du)特之(zhi)處。