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(guan)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(guan)(guan)機(ji)采用(yong)1個電機(ji)傳動，通過(guo)齒輪(lun)箱帶動3個軋輥(gun)。雖然軋輥(gun)的速度相同，但由于(yu)軋輥(gun)上的負(fu)荷分配不(bu)(bu)均(jun)。導致軋制時荒管(guan)(guan)壁厚不(bu)(bu)均(jun)和后端(duan)不(bu)(bu)圓。由于(yu)尾三(san)角的原因，只能生(sheng)產產D／SS不(bu)(bu)大(da)于(yu)12的鋼管(guan)(guan)。

  Assel軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)管(guan)機組(zu)經(jing)過近一(yi)個世(shi)紀的(de)(de)(de)(de)(de)發展之后，軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)鋼(gang)管(guan)的(de)(de)(de)(de)(de)直徑不(bu)斷加大。這使得芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)變(bian)得越(yue)來越(yue)重(zhong)(zhong)。由(you)此而(er)產生(sheng)的(de)(de)(de)(de)(de)問題(ti)是(shi)，笨重(zhong)(zhong)的(de)(de)(de)(de)(de)芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)重(zhong)(zhong)達數噸，給芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)的(de)(de)(de)(de)(de)操(cao)作和運輸帶來了(le)很大困難，并且直接影響(xiang)到軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)鋼(gang)管(guan)的(de)(de)(de)(de)(de)質量(liang)。芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)的(de)(de)(de)(de)(de)重(zhong)(zhong)量(liang)在(zai)某種程(cheng)度(du)(du)(du)(du)上制(zhi)(zhi)(zhi)約了(le)大直徑鋼(gang)管(guan)的(de)(de)(de)(de)(de)生(sheng)產。經(jing)過一(yi)段時間(jian)的(de)(de)(de)(de)(de)摸索之后。當今(jin)限(xian)動(dong)芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)Assel 軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)管(guan)機組(zu)可(ke)以滿足大直徑鋼(gang)管(guan)的(de)(de)(de)(de)(de)生(sheng)產。限(xian)動(dong)芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)Assel軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)管(guan)機的(de)(de)(de)(de)(de)技術(shu)特(te)點(dian)是(shi)在(zai)軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)過程(cheng)中(zhong)控(kong)制(zhi)(zhi)(zhi)芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)的(de)(de)(de)(de)(de)前進(jin)速度(du)(du)(du)(du)，使荒(huang)管(guan)的(de)(de)(de)(de)(de)前進(jin)速度(du)(du)(du)(du)大于芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)的(de)(de)(de)(de)(de)前進(jin)速度(du)(du)(du)(du)，芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)的(de)(de)(de)(de)(de)前進(jin)距離遠遠小(xiao)于荒(huang)管(guan)的(de)(de)(de)(de)(de)前進(jin)距離。根(gen)據限(xian)動(dong)芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)的(de)(de)(de)(de)(de)上述軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)特(te)點(dian)，便可(ke)根(gen)據生(sheng)產需要確定芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)的(de)(de)(de)(de)(de)軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)長(chang)度(du)(du)(du)(du)，并通過減(jian)少軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)長(chang)度(du)(du)(du)(du)的(de)(de)(de)(de)(de)方(fang)法來縮短芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)的(de)(de)(de)(de)(de)長(chang)度(du)(du)(du)(du)，從而(er)減(jian)輕芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)的(de)(de)(de)(de)(de)重(zhong)(zhong)量(liang)。對Assel軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)管(guan)機的(de)(de)(de)(de)(de)實(shi)驗研究分析表明(ming)，浮(fu)動(dong)芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)與限(xian)動(dong)芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)之間(jian)有很大差別，相比之下限(xian)動(dong)芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)具有更多優點(dian)：首(shou)先，取消(xiao)了(le)荒(huang)管(guan)與芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)之間(jian)的(de)(de)(de)(de)(de)脫棒(bang)(bang)系統，不(bu)僅減(jian)少了(le)設(she)備的(de)(de)(de)(de)(de)投入(ru)，還由(you)于芯(xin)(xin)(xin)(xin)(xin)(xin)棒(bang)(bang)不(bu)參(can)與運輸而(er)使得軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)大直徑的(de)(de)(de)(de)(de)鋼(gang)管(guan)成為(wei)可(ke)能；其次(ci)，可(ke)減(jian)小(xiao)附加應力(li)，增(zeng)大減(jian)徑量(liang)，保證了(le)軋(ya)(ya)(ya)(ya)(ya)(ya)(ya)制(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)質量(liang)。

  大直徑(jing)(jing)Assel軋(ya)(ya)管機組(zu)上采用(yong)單獨直接傳動。這一(yi)結(jie)構(gou)的(de)(de)優(you)點是(shi)，可以騰出(chu)(chu)更多的(de)(de)空(kong)間來布置(zhi)出(chu)(chu)口臺，以生產大直徑(jing)(jing)的(de)(de)鋼管；可以用(yong)改(gai)變每個軋(ya)(ya)輥速(su)度的(de)(de)方(fang)法來補償(chang)由(you)于(yu)負(fu)荷分配不均而引起的(de)(de)軋(ya)(ya)制速(su)度的(de)(de)差異(yi)，并能補償(chang)軋(ya)(ya)輥外(wai)徑(jing)(jing)不完全相等(deng)的(de)(de)差異(yi)。軋(ya)(ya)輥采用(yong)單獨傳動，并且為軸向出(chu)(chu)料直接進(jin)入定徑(jing)(jing)機，中間不設置(zhi)再加熱爐，這些都是(shi)當(dang)今Assel軋(ya)(ya)管機組(zu)的(de)(de)獨特之處。