大(da)(da)(da)應(ying)(ying)(ying)變鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)技術(shu)日趨成熟。雙相組(zu)織(zhi)管(guan)(guan)(guan)(guan)(guan)線(xian)(xian)(xian)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)的(de)成功(gong)開(kai)發提高了(le)高鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)級管(guan)(guan)(guan)(guan)(guan)線(xian)(xian)(xian)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)的(de)塑性(xing)變形能力(li)，降(jiang)低(di)了(le)應(ying)(ying)(ying)變時效(xiao)性(xing)能，X80大(da)(da)(da)應(ying)(ying)(ying)變鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)均已成功(gong)開(kai)發，通(tong)過(guo)(guo)了(le)新產(chan)品鑒(jian)定(ding)(ding)。我國(guo)(guo)(guo)(guo)(guo)西(xi)(xi)(xi)氣東(dong)輸(shu)(shu)二線(xian)(xian)(xian)在特(te)殊地段成功(gong)采用了(le)基(ji)于(yu)(yu)應(ying)(ying)(ying)變的(de)設計(ji)(ji)，并(bing)批量(liang)應(ying)(ying)(ying)用了(le)X80大(da)(da)(da)應(ying)(ying)(ying)變鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)；在西(xi)(xi)(xi)氣東(dong)輸(shu)(shu)二線(xian)(xian)(xian)工(gong)程開(kai)始前中(zhong)石油集團(tuan)(tuan)公(gong)(gong)司(si)(si)(si)為滿足工(gong)程需要，組(zu)織(zhi)國(guo)(guo)(guo)(guo)(guo)內多個鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)廠(chang)和(he)(he)制管(guan)(guan)(guan)(guan)(guan)廠(chang)開(kai)展了(le)《西(xi)(xi)(xi)氣東(dong)輸(shu)(shu)二線(xian)(xian)(xian)工(gong)程關鍵(jian)技術(shu)研(yan)(yan)究》重大(da)(da)(da)專項(xiang)一(yi)期研(yan)(yan)究，先后(hou)完(wan)成了(le)直縫、螺旋和(he)(he)彎管(guan)(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)(guan)件等產(chan)品研(yan)(yan)究，并(bing)實(shi)現了(le)全部國(guo)(guo)(guo)(guo)(guo)產(chan)化。但西(xi)(xi)(xi)氣東(dong)輸(shu)(shu)二線(xian)(xian)(xian)基(ji)于(yu)(yu)應(ying)(ying)(ying)變設計(ji)(ji)的(de)X80大(da)(da)(da)應(ying)(ying)(ying)變鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)沒有(you)(you)實(shi)現國(guo)(guo)(guo)(guo)(guo)產(chan)化，全部采用的(de)日本(ben)進(jin)口(kou)X80大(da)(da)(da)應(ying)(ying)(ying)變鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)。為了(le)解決這一(yi)難題，在《西(xi)(xi)(xi)氣東(dong)輸(shu)(shu)二線(xian)(xian)(xian)工(gong)程關鍵(jian)技術(shu)研(yan)(yan)究》重大(da)(da)(da)專項(xiang)二期研(yan)(yan)究中(zhong)，把(ba)大(da)(da)(da)應(ying)(ying)(ying)變鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)作為研(yan)(yan)究重點進(jin)一(yi)步開(kai)展研(yan)(yan)究。經過(guo)(guo)重大(da)(da)(da)專項(xiang)參加的(de)各(ge)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)廠(chang)和(he)(he)制管(guan)(guan)(guan)(guan)(guan)廠(chang)的(de)通(tong)力(li)合作，X70、X80大(da)(da)(da)應(ying)(ying)(ying)變鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)研(yan)(yan)究成功(gong)。X70大(da)(da)(da)應(ying)(ying)(ying)變鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)于(yu)(yu)2011年9月通(tong)過(guo)(guo)了(le)中(zhong)國(guo)(guo)(guo)(guo)(guo)石油天然氣集團(tuan)(tuan)公(gong)(gong)司(si)(si)(si)和(he)(he)中(zhong)國(guo)(guo)(guo)(guo)(guo)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)鐵工(gong)業(ye)協會(hui)在北京(jing)組(zu)織(zhi)的(de)鑒(jian)定(ding)(ding)。X70大(da)(da)(da)應(ying)(ying)(ying)變鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)成功(gong)應(ying)(ying)(ying)用于(yu)(yu)中(zhong)緬管(guan)(guan)(guan)(guan)(guan)道，由渤(bo)海裝備所(suo)屬巨(ju)龍(long)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)公(gong)(gong)司(si)(si)(si)、寶(bao)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)股份(fen)有(you)(you)限(xian)(xian)公(gong)(gong)司(si)(si)(si)和(he)(he)寶(bao)雞鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)所(suo)屬中(zhong)油寶(bao)世順（秦皇島）鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)有(you)(you)限(xian)(xian)公(gong)(gong)司(si)(si)(si)供應(ying)(ying)(ying)X70大(da)(da)(da)應(ying)(ying)(ying)變鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)共計(ji)(ji)4萬(wan)多噸(dun)，實(shi)現了(le)全面國(guo)(guo)(guo)(guo)(guo)產(chan)化，填補(bu)了(le)中(zhong)國(guo)(guo)(guo)(guo)(guo)X70大(da)(da)(da)變形焊(han)管(guan)(guan)(guan)(guan)(guan)制造空(kong)白(bai)。由鞍鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)、沙鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)供應(ying)(ying)(ying)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)板，巨(ju)龍(long)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)公(gong)(gong)司(si)(si)(si)和(he)(he)寶(bao)世順鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)公(gong)(gong)司(si)(si)(si)研(yan)(yan)制的(de)X80完(wan)成了(le)千噸(dun)級試生(sheng)產(chan)，并(bing)于(yu)(yu)2012年11月通(tong)過(guo)(guo)了(le)中(zhong)國(guo)(guo)(guo)(guo)(guo)石油天然氣集團(tuan)(tuan)公(gong)(gong)司(si)(si)(si)在北京(jing)組(zu)織(zhi)的(de)鑒(jian)定(ding)(ding)。標志著中(zhong)國(guo)(guo)(guo)(guo)(guo)X80大(da)(da)(da)應(ying)(ying)(ying)變鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)具備了(le)批量(liang)生(sheng)產(chan)能力(li)。2012年，中(zhong)油寶(bao)世順（秦皇島）鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)有(you)(you)限(xian)(xian)公(gong)(gong)司(si)(si)(si)和(he)(he)巨(ju)龍(long)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)公(gong)(gong)司(si)(si)(si)為西(xi)(xi)(xi)氣東(dong)輸(shu)(shu)三線(xian)(xian)(xian)供應(ying)(ying)(ying)X80鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)級ф1219mm×26.4mm大(da)(da)(da)應(ying)(ying)(ying)變焊(han)管(guan)(guan)(guan)(guan)(guan)，填補(bu)了(le)中(zhong)國(guo)(guo)(guo)(guo)(guo)X80大(da)(da)(da)應(ying)(ying)(ying)變焊(han)管(guan)(guan)(guan)(guan)(guan)制造空(kong)白(bai)。

  我國(guo)(guo)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)廠家也在開(kai)發高(gao)寒地區K60和(he)K65（X80）用(yong)(yong)管(guan)(guan)(guan)(guan)(guan)線鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)，并且取得了(le)重大(da)(da)進展。鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)低(di)溫(wen)(wen)(wen)(wen)韌性和(he)應變性能均比較理想(xiang)。正(zheng)在進行進一(yi)步的(de)(de)(de)開(kai)發。2006年原(yuan)華北石(shi)油(you)第一(yi)機(ji)械廠巨(ju)龍鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)首次開(kai)發符合(he)俄(e)羅斯標(biao)準(zhun)的(de)(de)(de)輸(shu)送鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)K60材(cai)質直縫(feng)(feng)埋弧焊鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)φ1220mmx19／22／24mm，2011年，渤海(hai)裝備所(suo)屬巨(ju)龍鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)公(gong)司(si)研(yan)制成功了(le)耐低(di)溫(wen)(wen)(wen)(wen)K60直縫(feng)(feng)焊管(guan)(guan)(guan)(guan)(guan)、彎管(guan)(guan)(guan)(guan)(guan)和(he)管(guan)(guan)(guan)(guan)(guan)件，并為中(zhong)俄(e)原(yuan)油(you)管(guan)(guan)(guan)(guan)(guan)道（二(er)期）供貨彎管(guan)(guan)(guan)(guan)(guan)Φ1220mm×33mm（36根）、φ1220mm×26.4mm（2根）。巨(ju)龍鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)公(gong)司(si)研(yan)制生產(chan)(chan)的(de)(de)(de)站場低(di)溫(wen)(wen)(wen)(wen)環(huan)(huan)(huan)境(jing)（-45℃）用(yong)(yong)φ1422mm×30.8mm X80直縫(feng)(feng)埋弧焊鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、站場低(di)溫(wen)(wen)(wen)(wen)環(huan)(huan)(huan)境(jing)（-45℃）用(yong)(yong)φ1422mm×33.8mm X80感應加(jia)熱彎管(guan)(guan)(guan)(guan)(guan)、站場低(di)溫(wen)(wen)(wen)(wen)環(huan)(huan)(huan)境(jing)（-45℃）用(yong)(yong)φ1422mm×1219×80三通于2018年11月，在集團(tuan)公(gong)司(si)進行鑒定，目前具備批(pi)量生產(chan)(chan)能力。該系列產(chan)(chan)品可實(shi)現-45℃環(huan)(huan)(huan)境(jing)下的(de)(de)(de)裸露服役(yi)，從而節省(sheng)大(da)(da)量因(yin)保溫(wen)(wen)(wen)(wen)伴熱措施導致的(de)(de)(de)建設與維護費用(yong)(yong)。該系列產(chan)(chan)品代表著當(dang)前國(guo)(guo)內油(you)氣輸(shu)送鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)最高(gao)水平(ping)，填(tian)補了(le)國(guo)(guo)內空白。

  國(guo)內(nei)酸(suan)性服(fu)役(yi)環境(jing)用(yong)高(gao)等(deng)級(ji)焊(han)(han)管(guan)(guan)(guan)起(qi)步晚，但(dan)進步很快。耐(nai)腐(fu)蝕管(guan)(guan)(guan)線(xian)鋼(gang)(gang)(gang)(gang)是輸送酸(suan)性天然氣管(guan)(guan)(guan)線(xian)的(de)(de)(de)(de)重要(yao)(yao)(yao)用(yong)鋼(gang)(gang)(gang)(gang)，是目(mu)前(qian)管(guan)(guan)(guan)線(xian)鋼(gang)(gang)(gang)(gang)中要(yao)(yao)(yao)求最(zui)為嚴格(ge)、技術(shu)水平要(yao)(yao)(yao)求最(zui)高(gao)的(de)(de)(de)(de)鋼(gang)(gang)(gang)(gang)種(zhong)，是管(guan)(guan)(guan)道用(yong)鋼(gang)(gang)(gang)(gang)系列的(de)(de)(de)(de)一(yi)個重要(yao)(yao)(yao)組成(cheng)部分(fen)，是當代冶金(jin)技術(shu)和裝備水平完美(mei)結合的(de)(de)(de)(de)典(dian)型產品。國(guo)內(nei)焊(han)(han)管(guan)(guan)(guan)企業(ye)和冶金(jin)企業(ye)聯合攻(gong)關(guan)，在冶煉純凈化、連鑄(zhu)低(di)倍控制、板材TMCP控制及耐(nai)酸(suan)焊(han)(han)材開發等(deng)方(fang)面取得巨大成(cheng)就。從鋼(gang)(gang)(gang)(gang)級(ji)來看，從主(zhu)要(yao)(yao)(yao)供(gong)(gong)應集輸的(de)(de)(de)(de)小直徑(jing)X52MS逐(zhu)漸發展到大直徑(jing)長距離外輸用(yong)X65MS，X70MS也有研發業(ye)績；從管(guan)(guan)(guan)型來看，從小口徑(jing)無縫、HFW焊(han)(han)管(guan)(guan)(guan)發展到大口徑(jing)埋(mai)弧焊(han)(han)管(guan)(guan)(guan)；從制管(guan)(guan)(guan)采用(yong)的(de)(de)(de)(de)原(yuan)材料看，不(bu)僅有螺旋管(guan)(guan)(guan)和HFW焊(han)(han)管(guan)(guan)(guan)需要(yao)(yao)(yao)的(de)(de)(de)(de)熱軋卷板，也有滿足(zu)大口徑(jing)直縫焊(han)(han)管(guan)(guan)(guan)的(de)(de)(de)(de)寬厚板；從供(gong)(gong)應市場來看，不(bu)僅滿足(zu)國(guo)內(nei)中石(shi)油(you)、中石(shi)化、中海(hai)油(you)等(deng)需求發展，高(gao)等(deng)級(ji)酸(suan)性環境(jing)用(yong)焊(han)(han)管(guan)(guan)(guan)還批量出口到中東、中亞和北美(mei)等(deng)國(guo)家(jia)和地區；典(dian)型管(guan)(guan)(guan)廠有寶鋼(gang)(gang)(gang)(gang)焊(han)(han)管(guan)(guan)(guan)部、渤(bo)海(hai)裝備、寶雞鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)、珠(zhu)江鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)等(deng)企業(ye)，典(dian)型工(gong)程如2004年(nian)全部采用(yong)國(guo)產X65MS直縫埋(mai)弧焊(han)(han)管(guan)(guan)(guan)的(de)(de)(de)(de)忠-武(wu)輸氣管(guan)(guan)(guan)線(xian)工(gong)程，2015年(nian)寶鋼(gang)(gang)(gang)(gang)獨家(jia)供(gong)(gong)應2.68萬(wan)噸(dun)(dun)(dun)X65MS直縫埋(mai)弧焊(han)(han)管(guan)(guan)(guan)的(de)(de)(de)(de) BP KHAZZAN 1期項目(mu)等(deng)。寶鋼(gang)(gang)(gang)(gang)股份(fen)有限公司截至目(mu)前(qian)耐(nai)酸(suan)焊(han)(han)管(guan)(guan)(guan)共(gong)計(ji)生(sheng)產55萬(wan)噸(dun)(dun)(dun)，其中埋(mai)弧焊(han)(han)管(guan)(guan)(guan)約(yue)50萬(wan)噸(dun)(dun)(dun)，HFW焊(han)(han)管(guan)(guan)(guan)約(yue)5萬(wan)噸(dun)(dun)(dun)；珠(zhu)江鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)生(sheng)產的(de)(de)(de)(de)耐(nai)酸(suan)焊(han)(han)管(guan)(guan)(guan)累計(ji)超(chao)過(guo)了10萬(wan)噸(dun)(dun)(dun)；巨龍(long)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)公司為土庫曼、長慶油(you)田等(deng)供(gong)(gong)貨共(gong)計(ji)3.4萬(wan)噸(dun)(dun)(dun)。