大(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)技術日趨成(cheng)(cheng)熟。雙(shuang)相組(zu)織管(guan)(guan)(guan)(guan)線鋼(gang)(gang)(gang)(gang)(gang)(gang)的(de)成(cheng)(cheng)功開(kai)(kai)發提高(gao)了(le)(le)(le)高(gao)鋼(gang)(gang)(gang)(gang)(gang)(gang)級(ji)管(guan)(guan)(guan)(guan)線鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)的(de)塑(su)性變(bian)形能(neng)力，降低了(le)(le)(le)應(ying)(ying)(ying)(ying)(ying)變(bian)時(shi)效性能(neng)，X80大(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)均(jun)已(yi)成(cheng)(cheng)功開(kai)(kai)發，通(tong)(tong)過了(le)(le)(le)新(xin)產(chan)品(pin)鑒定。我國(guo)(guo)西氣(qi)(qi)(qi)東(dong)輸二(er)(er)線在(zai)特殊地(di)段成(cheng)(cheng)功采(cai)用了(le)(le)(le)基(ji)于應(ying)(ying)(ying)(ying)(ying)變(bian)的(de)設計，并批量(liang)應(ying)(ying)(ying)(ying)(ying)用了(le)(le)(le)X80大(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)；在(zai)西氣(qi)(qi)(qi)東(dong)輸二(er)(er)線工(gong)程(cheng)(cheng)開(kai)(kai)始前(qian)中(zhong)石(shi)油集團公(gong)(gong)司為(wei)滿足(zu)工(gong)程(cheng)(cheng)需要，組(zu)織國(guo)(guo)內多個鋼(gang)(gang)(gang)(gang)(gang)(gang)廠和制管(guan)(guan)(guan)(guan)廠開(kai)(kai)展(zhan)了(le)(le)(le)《西氣(qi)(qi)(qi)東(dong)輸二(er)(er)線工(gong)程(cheng)(cheng)關鍵技術研(yan)(yan)(yan)(yan)究(jiu)(jiu)(jiu)》重大(da)專(zhuan)(zhuan)項一(yi)期研(yan)(yan)(yan)(yan)究(jiu)(jiu)(jiu)，先后完成(cheng)(cheng)了(le)(le)(le)直縫(feng)、螺(luo)旋和彎管(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)件等(deng)產(chan)品(pin)研(yan)(yan)(yan)(yan)究(jiu)(jiu)(jiu)，并實(shi)(shi)現了(le)(le)(le)全部國(guo)(guo)產(chan)化(hua)(hua)。但(dan)西氣(qi)(qi)(qi)東(dong)輸二(er)(er)線基(ji)于應(ying)(ying)(ying)(ying)(ying)變(bian)設計的(de)X80大(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)沒有(you)實(shi)(shi)現國(guo)(guo)產(chan)化(hua)(hua)，全部采(cai)用的(de)日本進(jin)口(kou)X80大(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)。為(wei)了(le)(le)(le)解決這(zhe)一(yi)難題，在(zai)《西氣(qi)(qi)(qi)東(dong)輸二(er)(er)線工(gong)程(cheng)(cheng)關鍵技術研(yan)(yan)(yan)(yan)究(jiu)(jiu)(jiu)》重大(da)專(zhuan)(zhuan)項二(er)(er)期研(yan)(yan)(yan)(yan)究(jiu)(jiu)(jiu)中(zhong)，把大(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)作(zuo)為(wei)研(yan)(yan)(yan)(yan)究(jiu)(jiu)(jiu)重點(dian)進(jin)一(yi)步開(kai)(kai)展(zhan)研(yan)(yan)(yan)(yan)究(jiu)(jiu)(jiu)。經過重大(da)專(zhuan)(zhuan)項參(can)加的(de)各鋼(gang)(gang)(gang)(gang)(gang)(gang)廠和制管(guan)(guan)(guan)(guan)廠的(de)通(tong)(tong)力合(he)作(zuo)，X70、X80大(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)研(yan)(yan)(yan)(yan)究(jiu)(jiu)(jiu)成(cheng)(cheng)功。X70大(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)于2011年(nian)9月通(tong)(tong)過了(le)(le)(le)中(zhong)國(guo)(guo)石(shi)油天然(ran)(ran)氣(qi)(qi)(qi)集團公(gong)(gong)司和中(zhong)國(guo)(guo)鋼(gang)(gang)(gang)(gang)(gang)(gang)鐵工(gong)業協會在(zai)北(bei)(bei)京組(zu)織的(de)鑒定。X70大(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)成(cheng)(cheng)功應(ying)(ying)(ying)(ying)(ying)用于中(zhong)緬管(guan)(guan)(guan)(guan)道，由(you)渤(bo)海裝(zhuang)備所屬巨龍(long)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)公(gong)(gong)司、寶(bao)鋼(gang)(gang)(gang)(gang)(gang)(gang)股份(fen)有(you)限公(gong)(gong)司和寶(bao)雞鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)所屬中(zhong)油寶(bao)世(shi)順（秦皇島(dao)）鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)有(you)限公(gong)(gong)司供(gong)應(ying)(ying)(ying)(ying)(ying)X70大(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)共計4萬多噸，實(shi)(shi)現了(le)(le)(le)全面國(guo)(guo)產(chan)化(hua)(hua)，填補(bu)了(le)(le)(le)中(zhong)國(guo)(guo)X70大(da)變(bian)形焊(han)管(guan)(guan)(guan)(guan)制造空白。由(you)鞍鋼(gang)(gang)(gang)(gang)(gang)(gang)、沙(sha)鋼(gang)(gang)(gang)(gang)(gang)(gang)供(gong)應(ying)(ying)(ying)(ying)(ying)鋼(gang)(gang)(gang)(gang)(gang)(gang)板，巨龍(long)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)公(gong)(gong)司和寶(bao)世(shi)順鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)公(gong)(gong)司研(yan)(yan)(yan)(yan)制的(de)X80完成(cheng)(cheng)了(le)(le)(le)千噸級(ji)試生產(chan)，并于2012年(nian)11月通(tong)(tong)過了(le)(le)(le)中(zhong)國(guo)(guo)石(shi)油天然(ran)(ran)氣(qi)(qi)(qi)集團公(gong)(gong)司在(zai)北(bei)(bei)京組(zu)織的(de)鑒定。標志著中(zhong)國(guo)(guo)X80大(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)具備了(le)(le)(le)批量(liang)生產(chan)能(neng)力。2012年(nian)，中(zhong)油寶(bao)世(shi)順（秦皇島(dao)）鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)有(you)限公(gong)(gong)司和巨龍(long)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)公(gong)(gong)司為(wei)西氣(qi)(qi)(qi)東(dong)輸三線供(gong)應(ying)(ying)(ying)(ying)(ying)X80鋼(gang)(gang)(gang)(gang)(gang)(gang)級(ji)ф1219mm×26.4mm大(da)應(ying)(ying)(ying)(ying)(ying)變(bian)焊(han)管(guan)(guan)(guan)(guan)，填補(bu)了(le)(le)(le)中(zhong)國(guo)(guo)X80大(da)應(ying)(ying)(ying)(ying)(ying)變(bian)焊(han)管(guan)(guan)(guan)(guan)制造空白。

  我國(guo)鋼(gang)管(guan)(guan)廠(chang)家也在(zai)開(kai)發(fa)(fa)高寒(han)地(di)區K60和K65（X80）用管(guan)(guan)線鋼(gang)管(guan)(guan)，并且取得了(le)重大(da)(da)進(jin)展(zhan)。鋼(gang)管(guan)(guan)的低溫(wen)韌性和應變性能均比較(jiao)理想。正在(zai)進(jin)行進(jin)一(yi)(yi)步的開(kai)發(fa)(fa)。2006年(nian)(nian)原華(hua)北石油(you)(you)第一(yi)(yi)機械廠(chang)巨(ju)龍(long)鋼(gang)管(guan)(guan)首次開(kai)發(fa)(fa)符合俄羅斯(si)標準的輸送鋼(gang)管(guan)(guan)K60材質直縫埋弧焊(han)鋼(gang)管(guan)(guan)φ1220mmx19／22／24mm，2011年(nian)(nian)，渤海裝備所(suo)屬巨(ju)龍(long)鋼(gang)管(guan)(guan)公(gong)(gong)司研(yan)制成(cheng)功了(le)耐低溫(wen)K60直縫焊(han)管(guan)(guan)、彎管(guan)(guan)和管(guan)(guan)件(jian)，并為中俄原油(you)(you)管(guan)(guan)道（二(er)期）供貨(huo)彎管(guan)(guan)Φ1220mm×33mm（36根(gen)）、φ1220mm×26.4mm（2根(gen)）。巨(ju)龍(long)鋼(gang)管(guan)(guan)公(gong)(gong)司研(yan)制生產(chan)的站(zhan)(zhan)場低溫(wen)環(huan)境(jing)(jing)（-45℃）用φ1422mm×30.8mm X80直縫埋弧焊(han)鋼(gang)管(guan)(guan)、站(zhan)(zhan)場低溫(wen)環(huan)境(jing)(jing)（-45℃）用φ1422mm×33.8mm X80感(gan)應加熱(re)彎管(guan)(guan)、站(zhan)(zhan)場低溫(wen)環(huan)境(jing)(jing)（-45℃）用φ1422mm×1219×80三通于2018年(nian)(nian)11月，在(zai)集團公(gong)(gong)司進(jin)行鑒定，目(mu)前具(ju)備批量(liang)生產(chan)能力。該(gai)系列(lie)產(chan)品可實現-45℃環(huan)境(jing)(jing)下的裸(luo)露服役，從而節省大(da)(da)量(liang)因保溫(wen)伴熱(re)措(cuo)施(shi)導致的建設與維護(hu)費用。該(gai)系列(lie)產(chan)品代表著當前國(guo)內油(you)(you)氣輸送鋼(gang)管(guan)(guan)最高水平，填補了(le)國(guo)內空(kong)白。

  國內(nei)酸(suan)(suan)性(xing)服役環境(jing)用(yong)高等級焊(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)起步(bu)(bu)晚，但進步(bu)(bu)很快。耐腐蝕(shi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)線鋼(gang)(gang)(gang)是(shi)(shi)輸(shu)送(song)酸(suan)(suan)性(xing)天然(ran)氣管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)線的(de)(de)(de)(de)重要(yao)(yao)用(yong)鋼(gang)(gang)(gang)，是(shi)(shi)目前(qian)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)線鋼(gang)(gang)(gang)中(zhong)(zhong)要(yao)(yao)求最為嚴(yan)格、技(ji)術(shu)水平(ping)要(yao)(yao)求最高的(de)(de)(de)(de)鋼(gang)(gang)(gang)種，是(shi)(shi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)用(yong)鋼(gang)(gang)(gang)系列的(de)(de)(de)(de)一個(ge)重要(yao)(yao)組成部(bu)分，是(shi)(shi)當代冶金(jin)技(ji)術(shu)和裝(zhuang)備(bei)水平(ping)完美(mei)結合的(de)(de)(de)(de)典型產(chan)品(pin)。國內(nei)焊(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)企(qi)業和冶金(jin)企(qi)業聯合攻關，在冶煉純凈化、連鑄(zhu)低倍(bei)控(kong)(kong)制、板材TMCP控(kong)(kong)制及耐酸(suan)(suan)焊(han)(han)材開發(fa)(fa)等方(fang)面取得巨大(da)成就。從鋼(gang)(gang)(gang)級來(lai)看，從主(zhu)要(yao)(yao)供應集輸(shu)的(de)(de)(de)(de)小直徑(jing)X52MS逐漸發(fa)(fa)展到(dao)大(da)直徑(jing)長距(ju)離外輸(shu)用(yong)X65MS，X70MS也(ye)有研發(fa)(fa)業績；從管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)型來(lai)看，從小口徑(jing)無縫(feng)、HFW焊(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)發(fa)(fa)展到(dao)大(da)口徑(jing)埋(mai)弧焊(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)；從制管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)采用(yong)的(de)(de)(de)(de)原材料看，不僅有螺旋(xuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和HFW焊(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)需要(yao)(yao)的(de)(de)(de)(de)熱軋卷板，也(ye)有滿足大(da)口徑(jing)直縫(feng)焊(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)寬厚板；從供應市場來(lai)看，不僅滿足國內(nei)中(zhong)(zhong)石油、中(zhong)(zhong)石化、中(zhong)(zhong)海油等需求發(fa)(fa)展，高等級酸(suan)(suan)性(xing)環境(jing)用(yong)焊(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)還(huan)批(pi)量出口到(dao)中(zhong)(zhong)東、中(zhong)(zhong)亞和北美(mei)等國家和地區；典型管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)廠有寶(bao)鋼(gang)(gang)(gang)焊(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)部(bu)、渤海裝(zhuang)備(bei)、寶(bao)雞鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、珠江鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)等企(qi)業，典型工程如2004年(nian)全(quan)部(bu)采用(yong)國產(chan)X65MS直縫(feng)埋(mai)弧焊(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)忠-武輸(shu)氣管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)線工程，2015年(nian)寶(bao)鋼(gang)(gang)(gang)獨家供應2.68萬(wan)噸(dun)X65MS直縫(feng)埋(mai)弧焊(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de) BP KHAZZAN 1期項目等。寶(bao)鋼(gang)(gang)(gang)股(gu)份有限公(gong)司截至目前(qian)耐酸(suan)(suan)焊(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)共(gong)計生產(chan)55萬(wan)噸(dun)，其(qi)中(zhong)(zhong)埋(mai)弧焊(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)約50萬(wan)噸(dun)，HFW焊(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)約5萬(wan)噸(dun)；珠江鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)生產(chan)的(de)(de)(de)(de)耐酸(suan)(suan)焊(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)累計超(chao)過了10萬(wan)噸(dun)；巨龍鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)公(gong)司為土庫(ku)曼、長慶油田等供貨共(gong)計3.4萬(wan)噸(dun)。