無縫鋼管生產工藝：

　　①熱軋無縫鋼管主要(yao)生產工(gong)序(△主要(yao)檢驗工(gong)序)：

　　管坯準備及檢查△→管坯加熱→穿(chuan)孔→軋管→鋼管再加熱→定(減)徑→熱處理(li)△→成(cheng)品管矯(jiao)直→精整→檢驗△(無(wu)損(sun)、理(li)化、臺檢) →入庫

　　②冷軋(拔)無縫鋼管主要生產工序：

　　坯料(liao)準備(bei)→酸(suan)洗(xi)潤滑→冷軋(拔)→熱(re)處(chu)理→矯(jiao)直→精整→檢(jian)驗

　　一(yi)般(ban)的(de)(de)無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)的(de)(de)生(sheng)(sheng)產(chan)工(gong)藝可以分為冷(leng)(leng)拔與熱(re)軋(ya)兩種，冷(leng)(leng)軋(ya)無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)的(de)(de)生(sheng)(sheng)產(chan)流程(cheng)一(yi)般(ban)要(yao)(yao)比熱(re)軋(ya)要(yao)(yao)復雜，管(guan)(guan)(guan)(guan)坯首先要(yao)(yao)進(jin)(jin)行三輥連軋(ya)，擠壓后(hou)要(yao)(yao)進(jin)(jin)行定(ding)徑測試，如(ru)果表(biao)(biao)(biao)面(mian)沒(mei)有(you)(you)響應(ying)裂(lie)紋后(hou)圓管(guan)(guan)(guan)(guan)要(yao)(yao)經過割(ge)機進(jin)(jin)行切割(ge)，切割(ge)成(cheng)長(chang)度約一(yi)米的(de)(de)坯料。然(ran)后(hou)進(jin)(jin)入退(tui)火(huo)流程(cheng)，退(tui)火(huo)要(yao)(yao)用酸性(xing)液體(ti)進(jin)(jin)行酸洗，酸洗時(shi)要(yao)(yao)注意表(biao)(biao)(biao)面(mian)是否有(you)(you)大(da)量(liang)的(de)(de)起泡產(chan)生(sheng)(sheng)，如(ru)果有(you)(you)大(da)量(liang)的(de)(de)起泡產(chan)生(sheng)(sheng)說明(ming)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)的(de)(de)質(zhi)量(liang)達不到相應(ying)的(de)(de)標準(zhun)。外(wai)觀上冷(leng)(leng)軋(ya)無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)要(yao)(yao)短(duan)于熱(re)軋(ya)無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)，冷(leng)(leng)軋(ya)無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)的(de)(de)壁厚一(yi)般(ban)比熱(re)軋(ya)無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)要(yao)(yao)小，但是表(biao)(biao)(biao)面(mian)看起來比厚壁無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)更加明(ming)亮，表(biao)(biao)(biao)面(mian)沒(mei)有(you)(you)太多(duo)(duo)的(de)(de)粗糙(cao)，口徑也(ye)沒(mei)有(you)(you)太多(duo)(duo)的(de)(de)毛刺。

　　無縫鋼管分類

　　沿其橫(heng)截面(mian)的周邊(bian)上無接縫的鋼(gang)(gang)(gang)管(guan)。根據生產方法不(bu)同分為熱軋管(guan)、冷軋管(guan)、冷拔(ba)管(guan)、擠壓管(guan)、頂管(guan)等(deng)，均有各(ge)自工藝規定(ding)。材質有普通(tong)和優質碳素結構(gou)鋼(gang)(gang)(gang)(Q215-A～Q275-A和10～50號鋼(gang)(gang)(gang))、低合金鋼(gang)(gang)(gang)(09MnV、16Mn等(deng))、合金鋼(gang)(gang)(gang)、不(bu)銹(xiu)耐(nai)酸鋼(gang)(gang)(gang)等(deng)。按用(yong)途分為一(yi)般用(yong)途的(用(yong)于(yu)輸水、氣管(guan)道和結構(gou)件、機械零件)和專用(yong)的(用(yong)于(yu)鍋爐(lu)、地質勘探、軸承、耐(nai)酸等(deng))兩類。