厚壁無縫鋼管的原料(liao)是圓管(guan)(guan)(guan)
坯(pi)，圓管(guan)(guan)(guan)胚要經過(guo)切割機的切割加(jia)工成長度(du)約(yue)為(wei)1米的坯(pi)料(liao)，并經傳送(song)帶送(song)到熔(rong)爐(lu)內(nei)加(jia)熱。鋼(gang)坯(pi)被送(song)入熔(rong)爐(lu)內(nei)加(jia)熱，溫(wen)度(du)大約(yue)為(wei)1200攝氏度(du)。燃料(liao)為(wei)氫氣或(huo)乙(yi)
炔。爐(lu)內(nei)溫(wen)度(du)控制是關鍵性的問題.圓管(guan)(guan)(guan)坯(pi)出爐(lu)后要經過(guo)壓力穿(chuan)孔(kong)機進(jin)行穿(chuan)空。一(yi)般較常(chang)見的穿(chuan)孔(kong)機是錐形輥穿(chuan)孔(kong)機，這種穿(chuan)孔(kong)機生產(chan)效率高，產(chan)品(pin)質(zhi)量好，穿(chuan)孔(kong)擴
徑量大，可(ke)穿(chuan)多種鋼(gang)種。穿(chuan)孔(kong)后，圓管(guan)(guan)(guan)坯(pi)就先后被三輥斜軋、連軋或(huo)擠壓。擠壓后要脫管(guan)(guan)(guan)定徑。
定(ding)徑(jing)機(ji)通過(guo)(guo)錐形(xing)鉆(zhan)頭高速旋轉入鋼(gang)胚打孔，形(xing)成鋼(gang)管(guan)(guan)(guan)。鋼(gang)管(guan)(guan)(guan)內徑(jing)由定(ding)徑(jing)機(ji)鉆(zhan)頭的外(wai)徑(jing)長度(du)來確定(ding)。鋼(gang)管(guan)(guan)(guan)經(jing)定(ding)徑(jing)后，進(jin)入冷卻塔中，通過(guo)(guo)噴水(shui)冷卻，鋼(gang)管(guan)(guan)(guan)
經(jing)冷卻后，就(jiu)要被矯(jiao)直。鋼(gang)管(guan)(guan)(guan)經(jing)矯(jiao)直后由傳送帶(dai)送至金屬(shu)探(tan)傷機(ji)(或水(shui)壓(ya)實驗)進(jin)行內部探(tan)傷。若鋼(gang)管(guan)(guan)(guan)內部有裂紋(wen)，氣(qi)泡等問(wen)題，將被探(tan)測(ce)出。鋼(gang)管(guan)(guan)(guan)質(zhi)檢后還要通過(guo)(guo)
嚴格的手工挑(tiao)選(xuan)。鋼(gang)管(guan)(guan)(guan)質(zhi)檢后，用油漆噴上編號(hao)、規格、生產批號(hao)等。
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