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(tong)的Assel軋(ya)管(guan)(guan)機采用(yong)1個電機傳動，通過齒輪箱帶動3個軋(ya)輥(gun)。雖然軋(ya)輥(gun)的速度相同(tong)，但由于軋(ya)輥(gun)上的負荷分配不均。導致軋(ya)制(zhi)時(shi)荒管(guan)(guan)壁(bi)厚不均和(he)后端不圓(yuan)。由于尾三(san)角的原因(yin)，只(zhi)能生(sheng)產產D／SS不大(da)于12的鋼管(guan)(guan)。

  Assel軋(ya)(ya)(ya)(ya)(ya)(ya)管(guan)機組經(jing)過近一個(ge)世(shi)紀的(de)(de)發(fa)展之后，軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)鋼(gang)(gang)(gang)管(guan)的(de)(de)直徑不斷加大(da)。這使得芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)變得越來越重(zhong)(zhong)。由此而(er)產生(sheng)的(de)(de)問題是(shi)，笨重(zhong)(zhong)的(de)(de)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)重(zhong)(zhong)達數噸，給芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)操作和運(yun)輸帶(dai)來了(le)(le)很大(da)困難，并且直接影(ying)響到(dao)軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)鋼(gang)(gang)(gang)管(guan)的(de)(de)質量(liang)。芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)重(zhong)(zhong)量(liang)在(zai)某(mou)種程度(du)上制(zhi)(zhi)(zhi)(zhi)約了(le)(le)大(da)直徑鋼(gang)(gang)(gang)管(guan)的(de)(de)生(sheng)產。經(jing)過一段時間的(de)(de)摸索(suo)之后。當今限(xian)動(dong)(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)Assel 軋(ya)(ya)(ya)(ya)(ya)(ya)管(guan)機組可(ke)以滿(man)足大(da)直徑鋼(gang)(gang)(gang)管(guan)的(de)(de)生(sheng)產。限(xian)動(dong)(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)Assel軋(ya)(ya)(ya)(ya)(ya)(ya)管(guan)機的(de)(de)技術特點(dian)是(shi)在(zai)軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)過程中控制(zhi)(zhi)(zhi)(zhi)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)前(qian)進速(su)度(du)，使荒管(guan)的(de)(de)前(qian)進速(su)度(du)大(da)于(yu)(yu)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)前(qian)進速(su)度(du)，芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)前(qian)進距離遠遠小于(yu)(yu)荒管(guan)的(de)(de)前(qian)進距離。根據限(xian)動(dong)(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)上述軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)特點(dian)，便可(ke)根據生(sheng)產需要(yao)確定芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)長(chang)度(du)，并通過減(jian)少(shao)軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)長(chang)度(du)的(de)(de)方法(fa)來縮(suo)短(duan)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)長(chang)度(du)，從而(er)減(jian)輕芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)重(zhong)(zhong)量(liang)。對Assel軋(ya)(ya)(ya)(ya)(ya)(ya)管(guan)機的(de)(de)實驗(yan)研究分析表明，浮動(dong)(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)與(yu)限(xian)動(dong)(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)之間有(you)很大(da)差別(bie)，相比之下限(xian)動(dong)(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)具有(you)更多(duo)優(you)點(dian)：首(shou)先，取消了(le)(le)荒管(guan)與(yu)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)之間的(de)(de)脫棒(bang)(bang)(bang)(bang)系統(tong)，不僅減(jian)少(shao)了(le)(le)設備的(de)(de)投(tou)入，還由于(yu)(yu)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)不參與(yu)運(yun)輸而(er)使得軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)大(da)直徑的(de)(de)鋼(gang)(gang)(gang)管(guan)成(cheng)為可(ke)能；其次，可(ke)減(jian)小附加應(ying)力，增(zeng)大(da)減(jian)徑量(liang)，保(bao)證(zheng)了(le)(le)軋(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)(zhi)的(de)(de)質量(liang)。

  大直(zhi)徑(jing)(jing)Assel軋管機(ji)組上采用單(dan)獨直(zhi)接(jie)(jie)傳(chuan)動。這一(yi)結構的(de)優點是(shi)，可以(yi)騰出(chu)更多(duo)的(de)空(kong)間來(lai)布置出(chu)口(kou)臺，以(yi)生產大直(zhi)徑(jing)(jing)的(de)鋼管；可以(yi)用改變每(mei)個軋輥(gun)速(su)度(du)的(de)方法(fa)來(lai)補償由(you)于負荷分配不均而(er)引(yin)起的(de)軋制速(su)度(du)的(de)差異，并能補償軋輥(gun)外徑(jing)(jing)不完(wan)全相等(deng)的(de)差異。軋輥(gun)采用單(dan)獨傳(chuan)動，并且為(wei)軸向出(chu)料直(zhi)接(jie)(jie)進(jin)入定徑(jing)(jing)機(ji)，中間不設置再加熱爐(lu)，這些都是(shi)當今Assel軋管機(ji)組的(de)獨特之處。