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Assel軋(ya)管(guan)機(ji)采用1個電機(ji)傳(chuan)動，通過齒(chi)輪(lun)箱(xiang)帶動3個軋(ya)輥(gun)。雖然軋(ya)輥(gun)的速度相同，但(dan)由(you)于(yu)(yu)軋(ya)輥(gun)上的負荷分配不(bu)均(jun)。導致軋(ya)制(zhi)時荒管(guan)壁(bi)厚不(bu)均(jun)和(he)后(hou)端不(bu)圓。由(you)于(yu)(yu)尾三角的原因，只能生產產D／SS不(bu)大于(yu)(yu)12的鋼管(guan)。

  Assel軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組(zu)經過近一個世紀的(de)(de)(de)(de)(de)(de)發展之(zhi)后，軋(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)(zhi)鋼(gang)管(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)直(zhi)(zhi)徑(jing)(jing)(jing)不(bu)斷(duan)加(jia)大(da)(da)(da)。這使(shi)得(de)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)變得(de)越來越重(zhong)。由此而產(chan)生(sheng)的(de)(de)(de)(de)(de)(de)問(wen)題是，笨重(zhong)的(de)(de)(de)(de)(de)(de)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)重(zhong)達數(shu)噸，給芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)操作和運輸(shu)(shu)帶(dai)來了(le)很(hen)大(da)(da)(da)困難(nan)，并且直(zhi)(zhi)接影(ying)響到軋(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)(zhi)鋼(gang)管(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)質(zhi)量(liang)(liang)(liang)。芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)重(zhong)量(liang)(liang)(liang)在某種程度(du)(du)(du)上制(zhi)(zhi)(zhi)(zhi)(zhi)約了(le)大(da)(da)(da)直(zhi)(zhi)徑(jing)(jing)(jing)鋼(gang)管(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)生(sheng)產(chan)。經過一段時間(jian)的(de)(de)(de)(de)(de)(de)摸索(suo)之(zhi)后。當今(jin)限(xian)動(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)Assel 軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組(zu)可以滿足大(da)(da)(da)直(zhi)(zhi)徑(jing)(jing)(jing)鋼(gang)管(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)生(sheng)產(chan)。限(xian)動(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)Assel軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)的(de)(de)(de)(de)(de)(de)技術特(te)點是在軋(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)(zhi)過程中控(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)前進(jin)(jin)速(su)度(du)(du)(du)，使(shi)荒管(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)前進(jin)(jin)速(su)度(du)(du)(du)大(da)(da)(da)于芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)前進(jin)(jin)速(su)度(du)(du)(du)，芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)前進(jin)(jin)距離遠遠小(xiao)于荒管(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)前進(jin)(jin)距離。根據限(xian)動(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)上述軋(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)(zhi)特(te)點，便可根據生(sheng)產(chan)需要確定芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)軋(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)(zhi)長(chang)度(du)(du)(du)，并通過減(jian)(jian)少軋(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)(zhi)長(chang)度(du)(du)(du)的(de)(de)(de)(de)(de)(de)方法來縮短芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)長(chang)度(du)(du)(du)，從而減(jian)(jian)輕芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)重(zhong)量(liang)(liang)(liang)。對Assel軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)的(de)(de)(de)(de)(de)(de)實驗研究分析表(biao)明(ming)，浮(fu)動(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)軋(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)(zhi)與(yu)限(xian)動(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)軋(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)(zhi)之(zhi)間(jian)有(you)很(hen)大(da)(da)(da)差(cha)別，相比之(zhi)下限(xian)動(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)軋(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)(zhi)具(ju)有(you)更(geng)多優點：首先(xian)，取消了(le)荒管(guan)(guan)(guan)與(yu)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)之(zhi)間(jian)的(de)(de)(de)(de)(de)(de)脫(tuo)棒(bang)(bang)(bang)(bang)系統(tong)，不(bu)僅減(jian)(jian)少了(le)設備的(de)(de)(de)(de)(de)(de)投入，還由于芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)不(bu)參與(yu)運輸(shu)(shu)而使(shi)得(de)軋(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)(zhi)大(da)(da)(da)直(zhi)(zhi)徑(jing)(jing)(jing)的(de)(de)(de)(de)(de)(de)鋼(gang)管(guan)(guan)(guan)成為可能；其次，可減(jian)(jian)小(xiao)附(fu)加(jia)應(ying)力，增大(da)(da)(da)減(jian)(jian)徑(jing)(jing)(jing)量(liang)(liang)(liang)，保證了(le)軋(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)(de)質(zhi)量(liang)(liang)(liang)。

  大直徑Assel軋(ya)管機組上采(cai)用單(dan)獨(du)直接(jie)傳動。這一結構的(de)優點是，可以騰(teng)出更多的(de)空間(jian)來布置(zhi)出口臺，以生產大直徑的(de)鋼管；可以用改變每個軋(ya)輥速度的(de)方法來補(bu)(bu)償由于負荷分配不(bu)均而引起(qi)的(de)軋(ya)制速度的(de)差(cha)異，并能補(bu)(bu)償軋(ya)輥外徑不(bu)完(wan)全相(xiang)等的(de)差(cha)異。軋(ya)輥采(cai)用單(dan)獨(du)傳動，并且為(wei)軸向(xiang)出料直接(jie)進入定徑機，中間(jian)不(bu)設置(zhi)再(zai)加熱爐，這些都(dou)是當今Assel軋(ya)管機組的(de)獨(du)特之(zhi)處。