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　　冷軋20G無縫鋼管(guan)(guan)的原材料是圓(yuan)精(jing)軋管(guan)(guan)，圓(yuan)鋼管(guan)(guan)胚要(yao)歷經自動(dong)切割機的激光切割生產加工(gong)成長短約為1米的胚料，并且經過輸送(song)帶送(song)至溶爐內加溫。

　　板坯被(bei)送(song)進溶爐內加溫(wen)(wen)，溫(wen)(wen)度大概(gai)為(wei)1200℃。然(ran)料為(wei)氡氣或(huo)乙炔氣體。爐內溫(wen)(wen)控是至(zhi)關(guan)重要(yao)(yao)的(de)難題(ti).圓精軋(ya)(ya)管(guan)公布后(hou)要(yao)(yao)歷經工作壓力穿(chuan)孔(kong)(kong)(kong)機(ji)開展(zhan)穿(chuan)空。一般較普遍(bian)的(de)穿(chuan)孔(kong)(kong)(kong)機(ji)是錐(zhui)(zhui)型輥(gun)穿(chuan)孔(kong)(kong)(kong)機(ji)，這類(lei)穿(chuan)孔(kong)(kong)(kong)機(ji)生(sheng)產制造高(gao)效(xiao)率，產品品質好，破孔(kong)(kong)(kong)擴(kuo)徑(jing)量大，可穿(chuan)多種多樣合金結(jie)構(gou)鋼(gang)(gang)(gang)(gang)。破孔(kong)(kong)(kong)后(hou)，圓精軋(ya)(ya)管(guan)就依次被(bei)三輥(gun)斜(xie)軋(ya)(ya)、連軋(ya)(ya)或(huo)擠壓成型。擠壓成型后(hou)要(yao)(yao)脫(tuo)管(guan)口(kou)模。定(ding)徑(jing)機(ji)根(gen)據錐(zhui)(zhui)型麻花(hua)鉆高(gao)速(su)運轉入鋼(gang)(gang)(gang)(gang)胚開洞，產生(sheng)無(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)。20G無(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)公稱直徑(jing)由定(ding)徑(jing)機(ji)麻花(hua)鉆的(de)直徑(jing)長短來明(ming)確。20G無(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)經定(ding)徑(jing)后(hou)，進到閉式冷(leng)卻塔中，根(gen)據灑(sa)水制冷(leng)，20G無(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)經制冷(leng)后(hou)，還要(yao)(yao)被(bei)校直。20G無(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)經校直后(hou)由輸送(song)帶送(song)往金屬(shu)探傷機(ji)(或(huo)壓力試驗)開展(zhan)內部(bu)探傷檢(jian)測(ce)。若(ruo)20G無(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)內部(bu)有裂痕，汽泡等難題(ti)，將(jiang)被(bei)檢(jian)測(ce)出。

　　20G無縫鋼管質量檢(jian)驗后也要根(gen)據嚴苛的(de)手工制作選擇。20G無縫鋼管質量檢(jian)驗后，用漆料噴(pen)完序(xu)號、規格(ge)型號、生產批號等。并(bing)由起重機吊入(ru)庫房中。