大(da)(da)(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)技術(shu)日趨成(cheng)(cheng)熟。雙相(xiang)組(zu)織管(guan)(guan)(guan)(guan)(guan)(guan)線(xian)(xian)(xian)鋼(gang)(gang)(gang)(gang)(gang)(gang)的(de)(de)成(cheng)(cheng)功(gong)開發提高(gao)了(le)(le)(le)(le)高(gao)鋼(gang)(gang)(gang)(gang)(gang)(gang)級(ji)管(guan)(guan)(guan)(guan)(guan)(guan)線(xian)(xian)(xian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)塑性變(bian)形能力(li)(li)，降低了(le)(le)(le)(le)應(ying)(ying)(ying)(ying)(ying)變(bian)時效性能，X80大(da)(da)(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)均(jun)已(yi)成(cheng)(cheng)功(gong)開發，通過了(le)(le)(le)(le)新(xin)產(chan)(chan)品鑒(jian)定(ding)。我國(guo)(guo)西氣(qi)(qi)東(dong)輸(shu)二線(xian)(xian)(xian)在特殊(shu)地段成(cheng)(cheng)功(gong)采(cai)(cai)用了(le)(le)(le)(le)基(ji)于(yu)(yu)應(ying)(ying)(ying)(ying)(ying)變(bian)的(de)(de)設計，并(bing)(bing)批量應(ying)(ying)(ying)(ying)(ying)用了(le)(le)(le)(le)X80大(da)(da)(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)；在西氣(qi)(qi)東(dong)輸(shu)二線(xian)(xian)(xian)工(gong)(gong)程開始前中(zhong)(zhong)(zhong)(zhong)石油集(ji)(ji)團公(gong)(gong)司(si)(si)(si)(si)(si)為滿足(zu)工(gong)(gong)程需要，組(zu)織國(guo)(guo)內多(duo)個鋼(gang)(gang)(gang)(gang)(gang)(gang)廠(chang)和(he)(he)(he)制管(guan)(guan)(guan)(guan)(guan)(guan)廠(chang)開展(zhan)(zhan)了(le)(le)(le)(le)《西氣(qi)(qi)東(dong)輸(shu)二線(xian)(xian)(xian)工(gong)(gong)程關鍵技術(shu)研(yan)(yan)究(jiu)(jiu)》重(zhong)大(da)(da)(da)專項一(yi)(yi)期研(yan)(yan)究(jiu)(jiu)，先后完成(cheng)(cheng)了(le)(le)(le)(le)直(zhi)縫、螺(luo)旋和(he)(he)(he)彎管(guan)(guan)(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)(guan)(guan)件等(deng)產(chan)(chan)品研(yan)(yan)究(jiu)(jiu)，并(bing)(bing)實(shi)現了(le)(le)(le)(le)全(quan)部(bu)國(guo)(guo)產(chan)(chan)化。但西氣(qi)(qi)東(dong)輸(shu)二線(xian)(xian)(xian)基(ji)于(yu)(yu)應(ying)(ying)(ying)(ying)(ying)變(bian)設計的(de)(de)X80大(da)(da)(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)沒有(you)實(shi)現國(guo)(guo)產(chan)(chan)化，全(quan)部(bu)采(cai)(cai)用的(de)(de)日本進口X80大(da)(da)(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)。為了(le)(le)(le)(le)解決這(zhe)一(yi)(yi)難題(ti)，在《西氣(qi)(qi)東(dong)輸(shu)二線(xian)(xian)(xian)工(gong)(gong)程關鍵技術(shu)研(yan)(yan)究(jiu)(jiu)》重(zhong)大(da)(da)(da)專項二期研(yan)(yan)究(jiu)(jiu)中(zhong)(zhong)(zhong)(zhong)，把大(da)(da)(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)作為研(yan)(yan)究(jiu)(jiu)重(zhong)點進一(yi)(yi)步開展(zhan)(zhan)研(yan)(yan)究(jiu)(jiu)。經過重(zhong)大(da)(da)(da)專項參(can)加的(de)(de)各鋼(gang)(gang)(gang)(gang)(gang)(gang)廠(chang)和(he)(he)(he)制管(guan)(guan)(guan)(guan)(guan)(guan)廠(chang)的(de)(de)通力(li)(li)合(he)作，X70、X80大(da)(da)(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)研(yan)(yan)究(jiu)(jiu)成(cheng)(cheng)功(gong)。X70大(da)(da)(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)于(yu)(yu)2011年(nian)(nian)9月(yue)通過了(le)(le)(le)(le)中(zhong)(zhong)(zhong)(zhong)國(guo)(guo)石油天然氣(qi)(qi)集(ji)(ji)團公(gong)(gong)司(si)(si)(si)(si)(si)和(he)(he)(he)中(zhong)(zhong)(zhong)(zhong)國(guo)(guo)鋼(gang)(gang)(gang)(gang)(gang)(gang)鐵工(gong)(gong)業協會在北京(jing)組(zu)織的(de)(de)鑒(jian)定(ding)。X70大(da)(da)(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)成(cheng)(cheng)功(gong)應(ying)(ying)(ying)(ying)(ying)用于(yu)(yu)中(zhong)(zhong)(zhong)(zhong)緬管(guan)(guan)(guan)(guan)(guan)(guan)道，由(you)渤海裝備所屬巨龍鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)公(gong)(gong)司(si)(si)(si)(si)(si)、寶鋼(gang)(gang)(gang)(gang)(gang)(gang)股份有(you)限公(gong)(gong)司(si)(si)(si)(si)(si)和(he)(he)(he)寶雞鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)所屬中(zhong)(zhong)(zhong)(zhong)油寶世(shi)順(shun)（秦(qin)皇(huang)島）鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)有(you)限公(gong)(gong)司(si)(si)(si)(si)(si)供(gong)應(ying)(ying)(ying)(ying)(ying)X70大(da)(da)(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)共計4萬(wan)多(duo)噸，實(shi)現了(le)(le)(le)(le)全(quan)面(mian)國(guo)(guo)產(chan)(chan)化，填(tian)(tian)補(bu)了(le)(le)(le)(le)中(zhong)(zhong)(zhong)(zhong)國(guo)(guo)X70大(da)(da)(da)變(bian)形焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)制造空(kong)白。由(you)鞍鋼(gang)(gang)(gang)(gang)(gang)(gang)、沙鋼(gang)(gang)(gang)(gang)(gang)(gang)供(gong)應(ying)(ying)(ying)(ying)(ying)鋼(gang)(gang)(gang)(gang)(gang)(gang)板，巨龍鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)公(gong)(gong)司(si)(si)(si)(si)(si)和(he)(he)(he)寶世(shi)順(shun)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)公(gong)(gong)司(si)(si)(si)(si)(si)研(yan)(yan)制的(de)(de)X80完成(cheng)(cheng)了(le)(le)(le)(le)千噸級(ji)試生(sheng)產(chan)(chan)，并(bing)(bing)于(yu)(yu)2012年(nian)(nian)11月(yue)通過了(le)(le)(le)(le)中(zhong)(zhong)(zhong)(zhong)國(guo)(guo)石油天然氣(qi)(qi)集(ji)(ji)團公(gong)(gong)司(si)(si)(si)(si)(si)在北京(jing)組(zu)織的(de)(de)鑒(jian)定(ding)。標志著中(zhong)(zhong)(zhong)(zhong)國(guo)(guo)X80大(da)(da)(da)應(ying)(ying)(ying)(ying)(ying)變(bian)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)具備了(le)(le)(le)(le)批量生(sheng)產(chan)(chan)能力(li)(li)。2012年(nian)(nian)，中(zhong)(zhong)(zhong)(zhong)油寶世(shi)順(shun)（秦(qin)皇(huang)島）鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)有(you)限公(gong)(gong)司(si)(si)(si)(si)(si)和(he)(he)(he)巨龍鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)公(gong)(gong)司(si)(si)(si)(si)(si)為西氣(qi)(qi)東(dong)輸(shu)三線(xian)(xian)(xian)供(gong)應(ying)(ying)(ying)(ying)(ying)X80鋼(gang)(gang)(gang)(gang)(gang)(gang)級(ji)ф1219mm×26.4mm大(da)(da)(da)應(ying)(ying)(ying)(ying)(ying)變(bian)焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)，填(tian)(tian)補(bu)了(le)(le)(le)(le)中(zhong)(zhong)(zhong)(zhong)國(guo)(guo)X80大(da)(da)(da)應(ying)(ying)(ying)(ying)(ying)變(bian)焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)制造空(kong)白。

  我國(guo)鋼管(guan)(guan)(guan)(guan)廠家也在開(kai)(kai)發(fa)高寒地(di)區(qu)K60和K65（X80）用(yong)管(guan)(guan)(guan)(guan)線鋼管(guan)(guan)(guan)(guan)，并且取得(de)了(le)(le)重(zhong)大進(jin)(jin)展。鋼管(guan)(guan)(guan)(guan)的(de)(de)(de)低溫韌(ren)性和應變性能均比(bi)較(jiao)理想。正在進(jin)(jin)行進(jin)(jin)一步(bu)的(de)(de)(de)開(kai)(kai)發(fa)。2006年原華北石油第一機械(xie)廠巨龍鋼管(guan)(guan)(guan)(guan)首次開(kai)(kai)發(fa)符合俄羅斯標準的(de)(de)(de)輸送鋼管(guan)(guan)(guan)(guan)K60材質直(zhi)縫埋弧(hu)(hu)焊(han)鋼管(guan)(guan)(guan)(guan)φ1220mmx19／22／24mm，2011年，渤海裝備所屬巨龍鋼管(guan)(guan)(guan)(guan)公司研制成(cheng)功了(le)(le)耐低溫K60直(zhi)縫焊(han)管(guan)(guan)(guan)(guan)、彎管(guan)(guan)(guan)(guan)和管(guan)(guan)(guan)(guan)件，并為(wei)中俄原油管(guan)(guan)(guan)(guan)道（二期(qi)）供貨彎管(guan)(guan)(guan)(guan)Φ1220mm×33mm（36根）、φ1220mm×26.4mm（2根）。巨龍鋼管(guan)(guan)(guan)(guan)公司研制生產(chan)的(de)(de)(de)站(zhan)場低溫環(huan)(huan)(huan)境(jing)(jing)（-45℃）用(yong)φ1422mm×30.8mm X80直(zhi)縫埋弧(hu)(hu)焊(han)鋼管(guan)(guan)(guan)(guan)、站(zhan)場低溫環(huan)(huan)(huan)境(jing)(jing)（-45℃）用(yong)φ1422mm×33.8mm X80感(gan)應加熱彎管(guan)(guan)(guan)(guan)、站(zhan)場低溫環(huan)(huan)(huan)境(jing)(jing)（-45℃）用(yong)φ1422mm×1219×80三(san)通于2018年11月，在集團公司進(jin)(jin)行鑒定，目前(qian)具備批量(liang)生產(chan)能力。該系列(lie)產(chan)品可(ke)實現-45℃環(huan)(huan)(huan)境(jing)(jing)下的(de)(de)(de)裸露服役，從(cong)而節省大量(liang)因(yin)保溫伴(ban)熱措施導致的(de)(de)(de)建(jian)設(she)與維(wei)護(hu)費用(yong)。該系列(lie)產(chan)品代表著當前(qian)國(guo)內油氣輸送鋼管(guan)(guan)(guan)(guan)最高水平，填補了(le)(le)國(guo)內空白。

  國(guo)內(nei)酸(suan)性服役環境用(yong)(yong)高等(deng)(deng)級(ji)焊(han)(han)(han)(han)管(guan)(guan)(guan)起(qi)步(bu)晚(wan)，但(dan)進步(bu)很快。耐腐蝕(shi)管(guan)(guan)(guan)線(xian)鋼(gang)(gang)(gang)是(shi)(shi)輸(shu)送酸(suan)性天然(ran)氣管(guan)(guan)(guan)線(xian)的(de)(de)(de)重要(yao)(yao)用(yong)(yong)鋼(gang)(gang)(gang)，是(shi)(shi)目(mu)(mu)前(qian)管(guan)(guan)(guan)線(xian)鋼(gang)(gang)(gang)中(zhong)要(yao)(yao)求(qiu)最(zui)為(wei)嚴格、技術(shu)水平要(yao)(yao)求(qiu)最(zui)高的(de)(de)(de)鋼(gang)(gang)(gang)種，是(shi)(shi)管(guan)(guan)(guan)道(dao)用(yong)(yong)鋼(gang)(gang)(gang)系(xi)列的(de)(de)(de)一個重要(yao)(yao)組成部(bu)分，是(shi)(shi)當代冶(ye)(ye)金技術(shu)和(he)裝備水平完美結(jie)合的(de)(de)(de)典型產品。國(guo)內(nei)焊(han)(han)(han)(han)管(guan)(guan)(guan)企(qi)(qi)業(ye)(ye)和(he)冶(ye)(ye)金企(qi)(qi)業(ye)(ye)聯合攻關(guan)，在(zai)冶(ye)(ye)煉(lian)純凈(jing)化、連鑄低倍控制(zhi)、板材(cai)TMCP控制(zhi)及(ji)耐酸(suan)焊(han)(han)(han)(han)材(cai)開發(fa)(fa)等(deng)(deng)方(fang)面(mian)取(qu)得巨(ju)大(da)(da)成就(jiu)。從(cong)鋼(gang)(gang)(gang)級(ji)來看，從(cong)主要(yao)(yao)供應集(ji)輸(shu)的(de)(de)(de)小(xiao)直(zhi)(zhi)(zhi)徑(jing)X52MS逐漸發(fa)(fa)展(zhan)到(dao)大(da)(da)直(zhi)(zhi)(zhi)徑(jing)長距離(li)外(wai)輸(shu)用(yong)(yong)X65MS，X70MS也(ye)(ye)有研發(fa)(fa)業(ye)(ye)績；從(cong)管(guan)(guan)(guan)型來看，從(cong)小(xiao)口徑(jing)無縫、HFW焊(han)(han)(han)(han)管(guan)(guan)(guan)發(fa)(fa)展(zhan)到(dao)大(da)(da)口徑(jing)埋弧焊(han)(han)(han)(han)管(guan)(guan)(guan)；從(cong)制(zhi)管(guan)(guan)(guan)采用(yong)(yong)的(de)(de)(de)原材(cai)料看，不(bu)僅(jin)有螺(luo)旋管(guan)(guan)(guan)和(he)HFW焊(han)(han)(han)(han)管(guan)(guan)(guan)需(xu)要(yao)(yao)的(de)(de)(de)熱軋卷板，也(ye)(ye)有滿足大(da)(da)口徑(jing)直(zhi)(zhi)(zhi)縫焊(han)(han)(han)(han)管(guan)(guan)(guan)的(de)(de)(de)寬厚板；從(cong)供應市(shi)場來看，不(bu)僅(jin)滿足國(guo)內(nei)中(zhong)石油(you)(you)、中(zhong)石化、中(zhong)海油(you)(you)等(deng)(deng)需(xu)求(qiu)發(fa)(fa)展(zhan)，高等(deng)(deng)級(ji)酸(suan)性環境用(yong)(yong)焊(han)(han)(han)(han)管(guan)(guan)(guan)還批(pi)量出(chu)口到(dao)中(zhong)東、中(zhong)亞和(he)北(bei)美等(deng)(deng)國(guo)家和(he)地(di)區；典型管(guan)(guan)(guan)廠(chang)有寶(bao)鋼(gang)(gang)(gang)焊(han)(han)(han)(han)管(guan)(guan)(guan)部(bu)、渤海裝備、寶(bao)雞鋼(gang)(gang)(gang)管(guan)(guan)(guan)、珠(zhu)江(jiang)鋼(gang)(gang)(gang)管(guan)(guan)(guan)等(deng)(deng)企(qi)(qi)業(ye)(ye)，典型工(gong)(gong)程如2004年(nian)全部(bu)采用(yong)(yong)國(guo)產X65MS直(zhi)(zhi)(zhi)縫埋弧焊(han)(han)(han)(han)管(guan)(guan)(guan)的(de)(de)(de)忠-武(wu)輸(shu)氣管(guan)(guan)(guan)線(xian)工(gong)(gong)程，2015年(nian)寶(bao)鋼(gang)(gang)(gang)獨家供應2.68萬(wan)噸X65MS直(zhi)(zhi)(zhi)縫埋弧焊(han)(han)(han)(han)管(guan)(guan)(guan)的(de)(de)(de) BP KHAZZAN 1期項目(mu)(mu)等(deng)(deng)。寶(bao)鋼(gang)(gang)(gang)股份(fen)有限公(gong)司截至(zhi)目(mu)(mu)前(qian)耐酸(suan)焊(han)(han)(han)(han)管(guan)(guan)(guan)共計生產55萬(wan)噸，其中(zhong)埋弧焊(han)(han)(han)(han)管(guan)(guan)(guan)約50萬(wan)噸，HFW焊(han)(han)(han)(han)管(guan)(guan)(guan)約5萬(wan)噸；珠(zhu)江(jiang)鋼(gang)(gang)(gang)管(guan)(guan)(guan)生產的(de)(de)(de)耐酸(suan)焊(han)(han)(han)(han)管(guan)(guan)(guan)累(lei)計超(chao)過了10萬(wan)噸；巨(ju)龍鋼(gang)(gang)(gang)管(guan)(guan)(guan)公(gong)司為(wei)土庫曼、長慶油(you)(you)田等(deng)(deng)供貨共計3.4萬(wan)噸。