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Assel軋管機(ji)采(cai)用1個電機(ji)傳動，通(tong)過齒輪箱帶動3個軋輥。雖然軋輥的速度相同，但由于(yu)軋輥上的負(fu)荷分(fen)配不(bu)均。導致軋制時荒管壁厚(hou)不(bu)均和(he)后端不(bu)圓。由于(yu)尾(wei)三角(jiao)的原因(yin)，只能生產產D／SS不(bu)大于(yu)12的鋼(gang)管。

  Assel軋(ya)(ya)管(guan)(guan)(guan)(guan)機組(zu)經過近一個世(shi)紀的(de)(de)(de)(de)(de)(de)(de)發展之(zhi)后，軋(ya)(ya)制(zhi)(zhi)(zhi)鋼管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)直(zhi)徑(jing)不(bu)斷加大(da)(da)(da)(da)(da)。這使(shi)得芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)變得越來(lai)越重(zhong)(zhong)。由(you)此(ci)而產(chan)(chan)生(sheng)的(de)(de)(de)(de)(de)(de)(de)問(wen)題(ti)是，笨重(zhong)(zhong)的(de)(de)(de)(de)(de)(de)(de)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)重(zhong)(zhong)達數噸，給(gei)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)操作和運(yun)輸帶(dai)來(lai)了很(hen)大(da)(da)(da)(da)(da)困(kun)難，并且直(zhi)接影響(xiang)到軋(ya)(ya)制(zhi)(zhi)(zhi)鋼管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)質量(liang)。芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)重(zhong)(zhong)量(liang)在某種程度(du)(du)上(shang)制(zhi)(zhi)(zhi)約了大(da)(da)(da)(da)(da)直(zhi)徑(jing)鋼管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)生(sheng)產(chan)(chan)。經過一段(duan)時間(jian)的(de)(de)(de)(de)(de)(de)(de)摸索之(zhi)后。當今限動(dong)(dong)(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)Assel 軋(ya)(ya)管(guan)(guan)(guan)(guan)機組(zu)可(ke)以滿足(zu)大(da)(da)(da)(da)(da)直(zhi)徑(jing)鋼管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)生(sheng)產(chan)(chan)。限動(dong)(dong)(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)Assel軋(ya)(ya)管(guan)(guan)(guan)(guan)機的(de)(de)(de)(de)(de)(de)(de)技術特(te)點(dian)是在軋(ya)(ya)制(zhi)(zhi)(zhi)過程中控(kong)制(zhi)(zhi)(zhi)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)前進(jin)速(su)(su)度(du)(du)，使(shi)荒(huang)(huang)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)前進(jin)速(su)(su)度(du)(du)大(da)(da)(da)(da)(da)于(yu)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)前進(jin)速(su)(su)度(du)(du)，芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)前進(jin)距離(li)(li)遠遠小于(yu)荒(huang)(huang)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)前進(jin)距離(li)(li)。根據限動(dong)(dong)(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)上(shang)述軋(ya)(ya)制(zhi)(zhi)(zhi)特(te)點(dian)，便可(ke)根據生(sheng)產(chan)(chan)需要確定(ding)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)軋(ya)(ya)制(zhi)(zhi)(zhi)長度(du)(du)，并通過減(jian)少軋(ya)(ya)制(zhi)(zhi)(zhi)長度(du)(du)的(de)(de)(de)(de)(de)(de)(de)方法(fa)來(lai)縮(suo)短芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)長度(du)(du)，從而減(jian)輕(qing)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)重(zhong)(zhong)量(liang)。對Assel軋(ya)(ya)管(guan)(guan)(guan)(guan)機的(de)(de)(de)(de)(de)(de)(de)實驗研究分析(xi)表(biao)明，浮動(dong)(dong)(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)軋(ya)(ya)制(zhi)(zhi)(zhi)與限動(dong)(dong)(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)軋(ya)(ya)制(zhi)(zhi)(zhi)之(zhi)間(jian)有很(hen)大(da)(da)(da)(da)(da)差(cha)別，相比(bi)之(zhi)下限動(dong)(dong)(dong)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)軋(ya)(ya)制(zhi)(zhi)(zhi)具有更多優點(dian)：首先，取消(xiao)了荒(huang)(huang)管(guan)(guan)(guan)(guan)與芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)之(zhi)間(jian)的(de)(de)(de)(de)(de)(de)(de)脫棒(bang)(bang)(bang)(bang)(bang)系統(tong)，不(bu)僅減(jian)少了設備的(de)(de)(de)(de)(de)(de)(de)投(tou)入，還(huan)由(you)于(yu)芯(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)(bang)不(bu)參與運(yun)輸而使(shi)得軋(ya)(ya)制(zhi)(zhi)(zhi)大(da)(da)(da)(da)(da)直(zhi)徑(jing)的(de)(de)(de)(de)(de)(de)(de)鋼管(guan)(guan)(guan)(guan)成(cheng)為可(ke)能；其次，可(ke)減(jian)小附加應(ying)力，增大(da)(da)(da)(da)(da)減(jian)徑(jing)量(liang)，保證了軋(ya)(ya)制(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)質量(liang)。

  大(da)(da)直徑(jing)(jing)Assel軋管機組上采(cai)用單獨(du)直接(jie)傳動(dong)(dong)。這一結構(gou)的優點是，可以(yi)騰出(chu)更多的空間(jian)來布置出(chu)口臺，以(yi)生產大(da)(da)直徑(jing)(jing)的鋼管；可以(yi)用改變每個(ge)軋輥(gun)(gun)速(su)度的方(fang)法來補(bu)償由于負荷分配不(bu)均(jun)而引起的軋制速(su)度的差(cha)異，并能補(bu)償軋輥(gun)(gun)外(wai)徑(jing)(jing)不(bu)完全相等的差(cha)異。軋輥(gun)(gun)采(cai)用單獨(du)傳動(dong)(dong)，并且為軸(zhou)向出(chu)料直接(jie)進入定徑(jing)(jing)機，中間(jian)不(bu)設置再(zai)加熱(re)爐，這些都(dou)是當今(jin)Assel軋管機組的獨(du)特之處。