大(da)(da)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)技(ji)術日趨成熟。雙相組(zu)(zu)織(zhi)(zhi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)線(xian)鋼(gang)(gang)(gang)(gang)的(de)成功開(kai)(kai)(kai)發提(ti)高了(le)(le)(le)(le)高鋼(gang)(gang)(gang)(gang)級管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)線(xian)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)塑性變(bian)(bian)形(xing)能力，降低(di)了(le)(le)(le)(le)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)時效(xiao)性能，X80大(da)(da)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)均已成功開(kai)(kai)(kai)發，通(tong)過了(le)(le)(le)(le)新產(chan)品鑒定。我國(guo)西(xi)(xi)(xi)(xi)氣(qi)(qi)東(dong)輸(shu)二(er)(er)線(xian)在特(te)殊(shu)地(di)段(duan)成功采用(yong)了(le)(le)(le)(le)基于(yu)(yu)(yu)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)的(de)設計，并批量應(ying)(ying)(ying)(ying)(ying)(ying)(ying)用(yong)了(le)(le)(le)(le)X80大(da)(da)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)；在西(xi)(xi)(xi)(xi)氣(qi)(qi)東(dong)輸(shu)二(er)(er)線(xian)工(gong)程開(kai)(kai)(kai)始(shi)前中(zhong)(zhong)(zhong)石(shi)油(you)(you)集(ji)團公(gong)司為(wei)滿足工(gong)程需要，組(zu)(zu)織(zhi)(zhi)國(guo)內多(duo)個鋼(gang)(gang)(gang)(gang)廠和(he)(he)制管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)廠開(kai)(kai)(kai)展了(le)(le)(le)(le)《西(xi)(xi)(xi)(xi)氣(qi)(qi)東(dong)輸(shu)二(er)(er)線(xian)工(gong)程關鍵(jian)技(ji)術研(yan)究》重大(da)(da)專(zhuan)項一期(qi)研(yan)究，先后完成了(le)(le)(le)(le)直(zhi)縫、螺旋和(he)(he)彎(wan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)件(jian)等產(chan)品研(yan)究，并實現了(le)(le)(le)(le)全(quan)(quan)部(bu)國(guo)產(chan)化(hua)(hua)。但西(xi)(xi)(xi)(xi)氣(qi)(qi)東(dong)輸(shu)二(er)(er)線(xian)基于(yu)(yu)(yu)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)設計的(de)X80大(da)(da)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)沒(mei)有(you)實現國(guo)產(chan)化(hua)(hua)，全(quan)(quan)部(bu)采用(yong)的(de)日本進口X80大(da)(da)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。為(wei)了(le)(le)(le)(le)解決這(zhe)一難題(ti)，在《西(xi)(xi)(xi)(xi)氣(qi)(qi)東(dong)輸(shu)二(er)(er)線(xian)工(gong)程關鍵(jian)技(ji)術研(yan)究》重大(da)(da)專(zhuan)項二(er)(er)期(qi)研(yan)究中(zhong)(zhong)(zhong)，把大(da)(da)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)作為(wei)研(yan)究重點進一步開(kai)(kai)(kai)展研(yan)究。經過重大(da)(da)專(zhuan)項參加的(de)各鋼(gang)(gang)(gang)(gang)廠和(he)(he)制管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)廠的(de)通(tong)力合作，X70、X80大(da)(da)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)研(yan)究成功。X70大(da)(da)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)于(yu)(yu)(yu)2011年9月通(tong)過了(le)(le)(le)(le)中(zhong)(zhong)(zhong)國(guo)石(shi)油(you)(you)天然氣(qi)(qi)集(ji)團公(gong)司和(he)(he)中(zhong)(zhong)(zhong)國(guo)鋼(gang)(gang)(gang)(gang)鐵工(gong)業協會在北(bei)(bei)京組(zu)(zu)織(zhi)(zhi)的(de)鑒定。X70大(da)(da)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)成功應(ying)(ying)(ying)(ying)(ying)(ying)(ying)用(yong)于(yu)(yu)(yu)中(zhong)(zhong)(zhong)緬管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)道，由渤(bo)海裝(zhuang)備(bei)所(suo)屬(shu)巨(ju)(ju)龍(long)(long)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)公(gong)司、寶(bao)(bao)鋼(gang)(gang)(gang)(gang)股份(fen)有(you)限公(gong)司和(he)(he)寶(bao)(bao)雞(ji)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)所(suo)屬(shu)中(zhong)(zhong)(zhong)油(you)(you)寶(bao)(bao)世順（秦皇(huang)(huang)島）鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)有(you)限公(gong)司供(gong)(gong)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)X70大(da)(da)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)共(gong)計4萬(wan)多(duo)噸，實現了(le)(le)(le)(le)全(quan)(quan)面國(guo)產(chan)化(hua)(hua)，填(tian)補了(le)(le)(le)(le)中(zhong)(zhong)(zhong)國(guo)X70大(da)(da)變(bian)(bian)形(xing)焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)制造(zao)空(kong)白。由鞍(an)鋼(gang)(gang)(gang)(gang)、沙(sha)鋼(gang)(gang)(gang)(gang)供(gong)(gong)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)鋼(gang)(gang)(gang)(gang)板，巨(ju)(ju)龍(long)(long)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)公(gong)司和(he)(he)寶(bao)(bao)世順鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)公(gong)司研(yan)制的(de)X80完成了(le)(le)(le)(le)千(qian)噸級試生(sheng)產(chan)，并于(yu)(yu)(yu)2012年11月通(tong)過了(le)(le)(le)(le)中(zhong)(zhong)(zhong)國(guo)石(shi)油(you)(you)天然氣(qi)(qi)集(ji)團公(gong)司在北(bei)(bei)京組(zu)(zu)織(zhi)(zhi)的(de)鑒定。標志(zhi)著中(zhong)(zhong)(zhong)國(guo)X80大(da)(da)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)具(ju)備(bei)了(le)(le)(le)(le)批量生(sheng)產(chan)能力。2012年，中(zhong)(zhong)(zhong)油(you)(you)寶(bao)(bao)世順（秦皇(huang)(huang)島）鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)有(you)限公(gong)司和(he)(he)巨(ju)(ju)龍(long)(long)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)公(gong)司為(wei)西(xi)(xi)(xi)(xi)氣(qi)(qi)東(dong)輸(shu)三線(xian)供(gong)(gong)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)X80鋼(gang)(gang)(gang)(gang)級ф1219mm×26.4mm大(da)(da)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，填(tian)補了(le)(le)(le)(le)中(zhong)(zhong)(zhong)國(guo)X80大(da)(da)應(ying)(ying)(ying)(ying)(ying)(ying)(ying)變(bian)(bian)焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)制造(zao)空(kong)白。

  我國鋼管(guan)(guan)(guan)(guan)(guan)(guan)廠(chang)家也(ye)在(zai)開(kai)發(fa)高寒(han)地區K60和K65（X80）用管(guan)(guan)(guan)(guan)(guan)(guan)線(xian)鋼管(guan)(guan)(guan)(guan)(guan)(guan)，并且取(qu)得了(le)重(zhong)大(da)進(jin)(jin)展(zhan)。鋼管(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)低溫韌性和應(ying)(ying)變性能均比較理想。正在(zai)進(jin)(jin)行(xing)進(jin)(jin)一步的(de)(de)開(kai)發(fa)。2006年(nian)原華北(bei)石(shi)油(you)第一機械廠(chang)巨(ju)(ju)龍(long)鋼管(guan)(guan)(guan)(guan)(guan)(guan)首次開(kai)發(fa)符合俄(e)(e)羅斯標準的(de)(de)輸(shu)送鋼管(guan)(guan)(guan)(guan)(guan)(guan)K60材質直縫埋弧焊鋼管(guan)(guan)(guan)(guan)(guan)(guan)φ1220mmx19／22／24mm，2011年(nian)，渤(bo)海裝備所屬巨(ju)(ju)龍(long)鋼管(guan)(guan)(guan)(guan)(guan)(guan)公(gong)司(si)研制(zhi)成功了(le)耐低溫K60直縫焊管(guan)(guan)(guan)(guan)(guan)(guan)、彎(wan)(wan)管(guan)(guan)(guan)(guan)(guan)(guan)和管(guan)(guan)(guan)(guan)(guan)(guan)件，并為(wei)中俄(e)(e)原油(you)管(guan)(guan)(guan)(guan)(guan)(guan)道（二(er)期）供(gong)貨彎(wan)(wan)管(guan)(guan)(guan)(guan)(guan)(guan)Φ1220mm×33mm（36根(gen)）、φ1220mm×26.4mm（2根(gen)）。巨(ju)(ju)龍(long)鋼管(guan)(guan)(guan)(guan)(guan)(guan)公(gong)司(si)研制(zhi)生產(chan)的(de)(de)站場低溫環境(jing)(jing)（-45℃）用φ1422mm×30.8mm X80直縫埋弧焊鋼管(guan)(guan)(guan)(guan)(guan)(guan)、站場低溫環境(jing)(jing)（-45℃）用φ1422mm×33.8mm X80感應(ying)(ying)加熱(re)彎(wan)(wan)管(guan)(guan)(guan)(guan)(guan)(guan)、站場低溫環境(jing)(jing)（-45℃）用φ1422mm×1219×80三通于2018年(nian)11月，在(zai)集(ji)團(tuan)公(gong)司(si)進(jin)(jin)行(xing)鑒定，目前(qian)具備批(pi)量生產(chan)能力。該系(xi)(xi)列(lie)產(chan)品可實現-45℃環境(jing)(jing)下(xia)的(de)(de)裸露服役，從而(er)節省大(da)量因保溫伴熱(re)措(cuo)施導致(zhi)的(de)(de)建設與維護費(fei)用。該系(xi)(xi)列(lie)產(chan)品代表(biao)著當前(qian)國內油(you)氣輸(shu)送鋼管(guan)(guan)(guan)(guan)(guan)(guan)最高水平，填補(bu)了(le)國內空白。

  國(guo)(guo)內(nei)酸(suan)(suan)性服役環境(jing)用(yong)(yong)(yong)高等(deng)(deng)級焊(han)管(guan)(guan)(guan)(guan)起步晚，但進步很快(kuai)。耐腐蝕管(guan)(guan)(guan)(guan)線(xian)鋼(gang)(gang)(gang)是輸(shu)送酸(suan)(suan)性天然氣管(guan)(guan)(guan)(guan)線(xian)的(de)(de)重(zhong)要(yao)用(yong)(yong)(yong)鋼(gang)(gang)(gang)，是目(mu)前管(guan)(guan)(guan)(guan)線(xian)鋼(gang)(gang)(gang)中(zhong)要(yao)求最為嚴格、技術(shu)水(shui)平要(yao)求最高的(de)(de)鋼(gang)(gang)(gang)種，是管(guan)(guan)(guan)(guan)道用(yong)(yong)(yong)鋼(gang)(gang)(gang)系列(lie)的(de)(de)一個重(zhong)要(yao)組成部分(fen)，是當代冶金(jin)技術(shu)和裝備(bei)(bei)水(shui)平完美(mei)結(jie)合(he)的(de)(de)典(dian)型(xing)產(chan)(chan)品。國(guo)(guo)內(nei)焊(han)管(guan)(guan)(guan)(guan)企(qi)業和冶金(jin)企(qi)業聯(lian)合(he)攻關，在冶煉純凈(jing)化、連鑄低倍控制(zhi)、板(ban)材TMCP控制(zhi)及耐酸(suan)(suan)焊(han)材開(kai)發(fa)等(deng)(deng)方面取得巨大成就。從鋼(gang)(gang)(gang)級來看(kan)(kan)，從主要(yao)供(gong)應集輸(shu)的(de)(de)小直徑X52MS逐(zhu)漸發(fa)展到大直徑長(chang)距離外輸(shu)用(yong)(yong)(yong)X65MS，X70MS也有(you)研(yan)發(fa)業績(ji)；從管(guan)(guan)(guan)(guan)型(xing)來看(kan)(kan)，從小口(kou)徑無(wu)縫(feng)、HFW焊(han)管(guan)(guan)(guan)(guan)發(fa)展到大口(kou)徑埋弧(hu)焊(han)管(guan)(guan)(guan)(guan)；從制(zhi)管(guan)(guan)(guan)(guan)采用(yong)(yong)(yong)的(de)(de)原(yuan)材料(liao)看(kan)(kan)，不僅有(you)螺旋管(guan)(guan)(guan)(guan)和HFW焊(han)管(guan)(guan)(guan)(guan)需(xu)要(yao)的(de)(de)熱軋卷(juan)板(ban)，也有(you)滿(man)足(zu)大口(kou)徑直縫(feng)焊(han)管(guan)(guan)(guan)(guan)的(de)(de)寬厚(hou)板(ban)；從供(gong)應市場來看(kan)(kan)，不僅滿(man)足(zu)國(guo)(guo)內(nei)中(zhong)石油(you)、中(zhong)石化、中(zhong)海(hai)油(you)等(deng)(deng)需(xu)求發(fa)展，高等(deng)(deng)級酸(suan)(suan)性環境(jing)用(yong)(yong)(yong)焊(han)管(guan)(guan)(guan)(guan)還批量出口(kou)到中(zhong)東、中(zhong)亞和北美(mei)等(deng)(deng)國(guo)(guo)家和地區；典(dian)型(xing)管(guan)(guan)(guan)(guan)廠有(you)寶(bao)鋼(gang)(gang)(gang)焊(han)管(guan)(guan)(guan)(guan)部、渤海(hai)裝備(bei)(bei)、寶(bao)雞鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)、珠江鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)等(deng)(deng)企(qi)業，典(dian)型(xing)工程(cheng)如(ru)2004年全部采用(yong)(yong)(yong)國(guo)(guo)產(chan)(chan)X65MS直縫(feng)埋弧(hu)焊(han)管(guan)(guan)(guan)(guan)的(de)(de)忠-武輸(shu)氣管(guan)(guan)(guan)(guan)線(xian)工程(cheng)，2015年寶(bao)鋼(gang)(gang)(gang)獨家供(gong)應2.68萬(wan)噸(dun)(dun)X65MS直縫(feng)埋弧(hu)焊(han)管(guan)(guan)(guan)(guan)的(de)(de) BP KHAZZAN 1期(qi)項(xiang)目(mu)等(deng)(deng)。寶(bao)鋼(gang)(gang)(gang)股份(fen)有(you)限公司截至目(mu)前耐酸(suan)(suan)焊(han)管(guan)(guan)(guan)(guan)共計生產(chan)(chan)55萬(wan)噸(dun)(dun)，其中(zhong)埋弧(hu)焊(han)管(guan)(guan)(guan)(guan)約(yue)50萬(wan)噸(dun)(dun)，HFW焊(han)管(guan)(guan)(guan)(guan)約(yue)5萬(wan)噸(dun)(dun)；珠江鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)生產(chan)(chan)的(de)(de)耐酸(suan)(suan)焊(han)管(guan)(guan)(guan)(guan)累計超過了10萬(wan)噸(dun)(dun)；巨龍鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)公司為土庫曼、長(chang)慶油(you)田等(deng)(deng)供(gong)貨共計3.4萬(wan)噸(dun)(dun)。