浙江金洲管(guan)道(dao)工業有(you)限(xian)公司φ508~1626mm預精焊(han)螺旋(xuan)縫埋弧焊(han)鋼(gang)管(guan)生(sheng)產(chan)線(xian)引(yin)進德國SMS MEER集團旗(qi)下(xia)PWS公司國際先進的預精焊(han)(二步法)螺旋(xuan)焊(han)管(guan)生(sheng)產(chan)技(ji)術(shu)和設備,于(yu)2015年(nian)(nian)1月(yue)正式投(tou)產(chan),年(nian)(nian)生(sheng)產(chan)能力20萬噸,生(sheng)產(chan)壁(bi)厚6.4mm~25.4mm,最高生(sheng)產(chan)鋼(gang)級 L690/X100。


  金州管道不(bu)銹鋼焊管生產線控制系統基于工業以太網技術,實現分布式自動化控制,是目前世界上裝備最先進、工藝最成熟、自動化程度最高的螺旋焊管生產線之一,在檢測設備方面生產線配備了112通道100%母材超聲波探傷、32通道焊縫超聲波探傷、數字平板X射線實時成像檢測系統、4000t水壓試驗機等。



一、生(sheng)產工藝流程


金洲科技管(guan)道有限公司(si)ф1626mm預(yu)精焊不銹鋼焊管(guan)機組工藝流程生產工藝流程如圖(tu)7-7所示。


7.jpg



二、主要技術(shu)特點


1. 高速成(cheng)型(xing)預焊機(ji)組(zu)技術


  穩(wen)(wen)定的(de)鋼帶工作(zuo)(zuo)寬度和穩(wen)(wen)定的(de)遞送狀(zhuang)態是(shi)實現(xian)穩(wen)(wen)定高速(su)成型(xing)的(de)前提,通(tong)過以下各系統的(de)協同工作(zuo)(zuo),使鋼帶以最穩(wen)(wen)的(de)狀(zhuang)態進入成型(xing)器,在(zai)高精度模型(xing)化的(de)成型(xing)系統中實現(xian)低應力穩(wen)(wen)定成型(xing),對外徑(jing)、圓度、直(zhi)度實現(xian)高精度控制,為(wei)預(yu)焊提供穩(wen)(wen)定的(de)焊接環境。


   a. 鋼(gang)帶矯(jiao)平(ping)(ping)(ping)裝置(zhi)配備七(qi)輥矯(jiao)平(ping)(ping)(ping)機,矯(jiao)平(ping)(ping)(ping)高度由電機調節,矯(jiao)平(ping)(ping)(ping)力(li)大(da)小由液壓缸提供,可對(dui)每個矯(jiao)平(ping)(ping)(ping)輥進行(xing)獨立控制,精確調整每個矯(jiao)平(ping)(ping)(ping)輥位置(zhi)的(de)壓力(li),使出口側鋼(gang)帶快速(su)達到理想的(de)矯(jiao)平(ping)(ping)(ping)狀態,其最大(da)矯(jiao)平(ping)(ping)(ping)力(li)600噸,滿足大(da)壁厚(hou)高鋼(gang)級的(de)高速(su)矯(jiao)平(ping)(ping)(ping)。


   b. 剪切對(dui)(dui)焊機(ji)配備伊薩等離子切割系統(tong)、板(ban)頭(tou)尾銑(xian)邊(bian)機(ji)、預焊系統(tong)、雙絲(si)自動埋弧焊系統(tong),通(tong)過先(xian)銑(xian)邊(bian)后焊接的工藝,有(you)效(xiao)避免(mian)因(yin)板(ban)頭(tou)尾對(dui)(dui)接人(ren)為地產生(sheng)鐮刀彎。采(cai)用Y型(xing)焊接坡口,配合(he)預焊+雙絲(si)自動埋弧焊工藝,使得對(dui)(dui)接接頭(tou)達到足夠(gou)的熔深和強度,確保對(dui)(dui)頭(tou)焊縫質(zhi)量(liang),實現鋼帶對(dui)(dui)接接頭(tou)在成型(xing)器快速穩定通(tong)過。


   c. 自(zi)適(shi)應銑(xian)(xian)(xian)(xian)(xian)邊(bian)(bian)機配(pei)備三(san)(san)組(zu)(zu)鋼帶寬(kuan)(kuan)(kuan)度(du)(du)(du)自(zi)適(shi)應銑(xian)(xian)(xian)(xian)(xian)邊(bian)(bian)機。第(di)一、二組(zu)(zu)銑(xian)(xian)(xian)(xian)(xian)邊(bian)(bian)機為粗銑(xian)(xian)(xian)(xian)(xian),寬(kuan)(kuan)(kuan)度(du)(du)(du)自(zi)適(shi)應系統通過實(shi)時檢測鋼帶銑(xian)(xian)(xian)(xian)(xian)邊(bian)(bian)前后寬(kuan)(kuan)(kuan)度(du)(du)(du),合理地(di)分(fen)配(pei)每組(zu)(zu)銑(xian)(xian)(xian)(xian)(xian)邊(bian)(bian)機切削深度(du)(du)(du),提(ti)高刀片的(de)(de)使用壽命,保(bao)證(zheng)銑(xian)(xian)(xian)(xian)(xian)邊(bian)(bian)質量;第(di)三(san)(san)組(zu)(zu)銑(xian)(xian)(xian)(xian)(xian)邊(bian)(bian)機為精銑(xian)(xian)(xian)(xian)(xian),根(gen)據壁厚和焊接工藝設定銑(xian)(xian)(xian)(xian)(xian)邊(bian)(bian)后工作寬(kuan)(kuan)(kuan)度(du)(du)(du)、坡(po)口角度(du)(du)(du),鈍(dun)(dun)邊(bian)(bian)厚度(du)(du)(du)、鈍(dun)(dun)邊(bian)(bian)位(wei)置,穩(wen)(wen)定的(de)(de)銑(xian)(xian)(xian)(xian)(xian)邊(bian)(bian)控制(zhi)為后續的(de)(de)焊接提(ti)供有(you)利條件(jian)。三(san)(san)組(zu)(zu)銑(xian)(xian)(xian)(xian)(xian)邊(bian)(bian)機刀盤(pan)在豎(shu)直(zhi)方(fang)向具有(you)仿(fang)形隨動功能(neng),有(you)效地(di)防止(zhi)由于帶鋼波動引(yin)起的(de)(de)坡(po)口不均勻,保(bao)證(zheng)邊(bian)(bian)部(bu)形狀良好穩(wen)(wen)定,從而確保(bao)成型(xing)過程穩(wen)(wen)定。同時銑(xian)(xian)(xian)(xian)(xian)邊(bian)(bian)機銑(xian)(xian)(xian)(xian)(xian)削速(su)度(du)(du)(du)在3~10m/min的(de)(de)遞送速(su)度(du)(du)(du)下(xia)自(zi)動進行自(zi)適(shi)應動態調節,滿(man)足高速(su)預焊的(de)(de)需求。


   d. 鋼(gang)帶(dai)(dai)(dai)自動對(dui)中系統(tong)配(pei)備多組鋼(gang)帶(dai)(dai)(dai)自動對(dui)中裝置,每組對(dui)中裝置均配(pei)備獨立(li)位置傳感器,實(shi)(shi)時監(jian)測鋼(gang)帶(dai)(dai)(dai)的(de)(de)位置信息(xi),系統(tong)自動判斷(duan)鋼(gang)帶(dai)(dai)(dai)位置狀態(tai)(tai)和變(bian)化趨勢,通過先進的(de)(de)PI閉(bi)環控制算法,實(shi)(shi)時動態(tai)(tai)分配(pei)各組對(dui)中輥推力,實(shi)(shi)現鋼(gang)帶(dai)(dai)(dai)自動對(dui)中,通過數據對(dui)比自動分析鋼(gang)帶(dai)(dai)(dai)鐮刀彎程(cheng)度,實(shi)(shi)時糾偏,保(bao)證成(cheng)型(xing)過程(cheng)穩定(ding)。


   e. 主驅動(dong)是整個成型預(yu)焊機組的(de)唯一動(dong)力,由兩(liang)臺210kW交流(liu)電機提供(gong)(gong),動(dong)力通過行星齒輪傳(chuan)輸到驅動(dong)輥,最(zui)大(da)驅動(dong)扭(niu)矩480kN·m,兩(liang)輥夾送壓力由液壓缸提供(gong)(gong),液壓回(hui)路中的(de)蓄能裝置可有效吸(xi)收焊縫通過輥子時的(de)壓力變化,提供(gong)(gong)穩定(ding)的(de)遞送速度。


   f. 高精度成(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)機(ji)主要(yao)由三輥(gun)彎曲系統和外控輥(gun)系統組成(cheng)(cheng)(cheng),最大成(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)力300t,各成(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)輥(gun)梁(liang)均配置伺服電機(ji)和絕對值編(bian)碼(ma)器,采(cai)用PWS先進的成(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)模型(xing)(xing)(xing)(xing)算法,通(tong)過精確(que)定位(wei)各成(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)輥(gun)位(wei)置,實現高速穩(wen)定成(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing),同時各位(wei)置信息通(tong)過PLC儲存,可重復調用,提高成(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)效率。


   g. 數(shu)字(zi)式預焊(han)系(xi)統(tong)采用CO2氣(qi)(qi)體保護(hu)焊(han),由兩臺1500A數(shu)字(zi)式焊(han)接(jie)電源串聯(lian)而成,內置專家級(ji)焊(han)接(jie)數(shu)據庫,根據壁厚和(he)焊(han)絲直徑不同,選(xuan)擇合(he)適(shi)的(de)(de)焊(han)接(jie)程(cheng)序(xu),程(cheng)序(xu)自動(dong)調用數(shu)據庫參(can)數(shu),并在焊(han)接(jie)過(guo)程(cheng)中對參(can)數(shu)進行PI閉(bi)環(huan)控(kong)制(zhi),其控(kong)制(zhi)了頻(pin)率達到(dao)5kHz,確保參(can)數(shu)輸出穩定。焊(han)接(jie)過(guo)程(cheng)采用潛弧式的(de)(de)過(guo)渡形(xing)式,配合(he)活(huo)性保護(hu)氣(qi)(qi)體,可(ke)(ke)在較高(gao)的(de)(de)焊(han)接(jie)速(su)度(du)下(xia)保持(chi)穩定的(de)(de)熔(rong)深,確保于焊(han)縫(feng)的(de)(de)強度(du),最高(gao)焊(han)接(jie)速(su)度(du)達10m/min。預焊(han)系(xi)統(tong)配備(bei)激光自動(dong)跟蹤(zong)系(xi)統(tong)和(he)視頻(pin)監控(kong)系(xi)統(tong),可(ke)(ke)對焊(han)點(dian)位置和(he)預焊(han)縫(feng)狀(zhuang)態實時監控(kong),實現自動(dong)化(hua)焊(han)接(jie)。


 2. 雙環(huan)噴水式(shi)等離子(zi)環(huan)切機


  配備雙環(huan)(huan)(huan)噴(pen)水式等離(li)子切(qie)(qie)割(ge)(ge)(ge)(ge)機。其(qi)雙環(huan)(huan)(huan)即夾持環(huan)(huan)(huan)和切(qie)(qie)割(ge)(ge)(ge)(ge)環(huan)(huan)(huan),夾持環(huan)(huan)(huan)包(bao)含3組抱(bao)夾裝置,同時環(huan)(huan)(huan)切(qie)(qie)機具備長度(du)測量系統(tong),控制精度(du)達(da)到(dao)1mm,當鋼(gang)(gang)(gang)管長度(du)達(da)到(dao)切(qie)(qie)割(ge)(ge)(ge)(ge)所設定的長度(du)時,夾持環(huan)(huan)(huan)夾緊鋼(gang)(gang)(gang)管,使切(qie)(qie)割(ge)(ge)(ge)(ge)系統(tong)與不銹鋼(gang)(gang)(gang)焊(han)管以同樣的速度(du)前(qian)進(jin),隨(sui)后切(qie)(qie)割(ge)(ge)(ge)(ge)環(huan)(huan)(huan)實施環(huan)(huan)(huan)切(qie)(qie)作(zuo)業。雙環(huan)(huan)(huan)等離(li)子切(qie)(qie)割(ge)(ge)(ge)(ge)系統(tong)使切(qie)(qie)割(ge)(ge)(ge)(ge)系統(tong)與鋼(gang)(gang)(gang)管形成一(yi)(yi)個相對速度(du)為0的狀態,提供穩定的切(qie)(qie)割(ge)(ge)(ge)(ge)環(huan)(huan)(huan)境,使得切(qie)(qie)口更(geng)加整齊;其(qi)噴(pen)水系統(tong)一(yi)(yi)方面對等離(li)子弧進(jin)行收弧聚(ju)能(neng)(neng),使切(qie)(qie)割(ge)(ge)(ge)(ge)能(neng)(neng)量更(geng)加集(ji)中,提高(gao)切(qie)(qie)割(ge)(ge)(ge)(ge)效(xiao)率(lv),另一(yi)(yi)方面對切(qie)(qie)割(ge)(ge)(ge)(ge)周圍進(jin)行冷卻,減(jian)少切(qie)(qie)割(ge)(ge)(ge)(ge)熱影響區,保證管端母材性能(neng)(neng)。


3. 精焊(han)機(FWM)


  配備3條(tiao)精焊(han)(han)(han)(han)線,每(mei)條(tiao)精焊(han)(han)(han)(han)線配置(zhi)(zhi)內(nei)(nei)焊(han)(han)(han)(han)三(san)絲和外(wai)焊(han)(han)(han)(han)雙絲的(de)(de)焊(han)(han)(han)(han)接(jie)系(xi)(xi)統,內(nei)(nei)焊(han)(han)(han)(han)和外(wai)焊(han)(han)(han)(han)均配置(zhi)(zhi)獨立的(de)(de)焊(han)(han)(han)(han)縫(feng)激光自(zi)(zi)動(dong)(dong)跟蹤系(xi)(xi)統、視(shi)(shi)頻監視(shi)(shi)系(xi)(xi)統、焊(han)(han)(han)(han)槍高度(du)跟蹤系(xi)(xi)統、焊(han)(han)(han)(han)接(jie)參數(shu)控(kong)制系(xi)(xi)統等(deng),通過(guo)(guo)各結(jie)構聯(lian)動(dong)(dong),實現自(zi)(zi)動(dong)(dong)的(de)(de)、實時的(de)(de)焊(han)(han)(han)(han)頭位(wei)置(zhi)(zhi)調節和校正(zheng),確(que)保每(mei)一條(tiao)焊(han)(han)(han)(han)縫(feng)的(de)(de)焊(han)(han)(han)(han)接(jie)質量,同時每(mei)支(zhi)不銹鋼焊(han)(han)(han)(han)管的(de)(de)焊(han)(han)(han)(han)接(jie)參數(shu)實時曲線可獨立存檔、回放,通過(guo)(guo)參數(shu)曲線可提前發現焊(han)(han)(han)(han)縫(feng)存在(zai)的(de)(de)隱患(huan)點,以(yi)進(jin)行針對性(xing)檢測(ce)。


4. PWS數字(zi)焊(han)接(jie)系統


  預焊和(he)精焊工(gong)(gong)藝均配(pei)備(bei)了PWS數字焊接系統,即焊接電源和(he)焊接工(gong)(gong)藝均通過微處理(li)器(qi)控制,從起弧到整(zheng)個焊接過程,微處理(li)器(qi)均以5kHz的頻率對焊接工(gong)(gong)藝進行分析和(he)優化。焊接工(gong)(gong)藝過程采取極高的頻率不斷進行分析和(he)優化,實(shi)現了對整(zheng)個焊接過程實(shi)時精確的PI閉環控制,其直接效果使得焊接過程十分穩定,減少了焊縫缺(que)陷(xian)和(he)管端焊接缺(que)陷(xian)。


5. 112通道(dao)在(zai)線鋼管超(chao)聲波(bo)檢測系(xi)統


  生(sheng)產線(xian)配備(bei)112通(tong)道在(zai)線(xian)鋼管(guan)超聲波檢(jian)測(ce)系統(tong),采用(yong)8×30mm雙晶組合(he)探頭(tou),共25組,100通(tong)道,探頭(tou)固定梳狀掃(sao)查(cha)方式對鋼板100%探傷(shang),用(yong)于(yu)檢(jian)測(ce)平行于(yu)軋(ya)制方向線(xian)性缺(que)(que)陷。同(tong)時鋼板兩邊(bian)200mm范(fan)圍(wei)內各(ge)(ge)(ge)有(you)5個(ge)橫(heng)(heng)波探頭(tou),用(yong)于(yu)檢(jian)測(ce)鋼板邊(bian)緣與軋(ya)制方向平行的缺(que)(que)陷。鋼板兩側各(ge)(ge)(ge)15mm范(fan)圍(wei)內各(ge)(ge)(ge)有(you)1個(ge)橫(heng)(heng)波探頭(tou),用(yong)于(yu)檢(jian)測(ce)鋼板邊(bian)緣與軋(ya)制方向垂直(zhi)的缺(que)(que)陷。設備(bei)具有(you)聲、光報(bao)警系統(tong),缺(que)(que)陷自動噴標系統(tong),以及各(ge)(ge)(ge)通(tong)道的耦合(he)監視(shi)系統(tong),缺(que)(que)陷檢(jian)出率100%。


6. 32通道(dao)焊縫超聲波檢(jian)測系統


  生產線配(pei)備32通道焊(han)縫超聲波檢測(ce)系統(tong),具有24個(ge)探傷通道和8個(ge)耦合監(jian)視通道,采(cai)用(yong)雙探架設計,配(pei)備激光圖像(xiang)自動(dong)跟(gen)蹤系統(tong),確保檢測(ce)過(guo)程穩(wen)定性。布局探頭有X型(xing)(xing)和串列型(xing)(xing),可檢測(ce)焊(han)縫內縱向、橫向、斜向、焊(han)縫中間缺(que)陷(xian)以及焊(han)縫兩側(ce)50mm范圍(wei)內的(de)熱影(ying)響區(qu)分層缺(que)陷(xian)。


7. X射線(xian)實時成像檢測系統


  生產線(xian)配備(bei)數字平板(ban)(ban)X射線(xian)實時成像檢(jian)測系(xi)統(tong),采(cai)用美(mei)國珀金埃爾默公司的(de)8in非晶數字平板(ban)(ban)系(xi)統(tong)XRD 0822 AP,空(kong)間分辨率優于(yu)3.0p/mm,具有全焊縫實時存(cun)圖及回放功能(neng),檢(jian)測靜(jing)態(tai)靈(ling)敏(min)度(du)1.0%~1.5%,動(dong)態(tai)靈(ling)敏(min)度(du)2.2%~2.5%。


8. 自動化鋼(gang)管輸送控制系統


  輸(shu)(shu)送(song)系(xi)統由(you)輸(shu)(shu)送(song)輥道(dao)、橫移(yi)(yi)小(xiao)車(che)、存管(guan)(guan)臺(tai)架(jia)構成,輸(shu)(shu)送(song)輥道(dao)每4個(ge)為(wei)一組,存管(guan)(guan)臺(tai)架(jia)采用V形臺(tai)架(jia),每組輥道(dao)、橫移(yi)(yi)小(xiao)車(che)和每個(ge)V形臺(tai)架(jia)均配置傳感(gan)器(qi),用于檢測(ce)鋼(gang)(gang)管(guan)(guan)位置,鋼(gang)(gang)管(guan)(guan)自(zi)(zi)動(dong)化輸(shu)(shu)送(song)控制(zhi)系(xi)統由(you)中央控制(zhi)室進行監控,并自(zi)(zi)動(dong)選擇(ze)最優程序實現整(zheng)個(ge)車(che)間(jian)鋼(gang)(gang)管(guan)(guan)的運輸(shu)(shu)和存放(fang),提高車(che)間(jian)作(zuo)業效率。


9. ERP信息(xi)化管理系統


  ERP系統包(bao)括(kuo)制(zhi)造數(shu)據(ju)管(guan)(guan)(guan)理(li)(li)、計(ji)劃排產(chan)(chan)管(guan)(guan)(guan)理(li)(li)、生(sheng)產(chan)(chan)調度管(guan)(guan)(guan)理(li)(li)、庫存管(guan)(guan)(guan)理(li)(li)、質(zhi)量管(guan)(guan)(guan)理(li)(li)、工藝過程管(guan)(guan)(guan)理(li)(li)、采購管(guan)(guan)(guan)理(li)(li)、成(cheng)本管(guan)(guan)(guan)理(li)(li)、生(sheng)產(chan)(chan)過程控制(zhi)、質(zhi)量數(shu)據(ju)集(ji)成(cheng)分(fen)析。實現從訂單下達到產(chan)(chan)品(pin)(pin)完成(cheng)的整個生(sheng)產(chan)(chan)過程的優化管(guan)(guan)(guan)理(li)(li),改善(shan)各個環節(jie)的銜接(jie)效率,對生(sheng)產(chan)(chan)進(jin)度、產(chan)(chan)品(pin)(pin)質(zhi)量數(shu)據(ju)實時反(fan)饋,從而保障產(chan)(chan)品(pin)(pin)質(zhi)量和(he)工廠及(ji)時交貨能(neng)力。


10. 機器人自(zi)動噴標系統


  生產線(xian)配備機(ji)(ji)器人自(zi)動噴(pen)標系統(tong),實(shi)現生產過(guo)程(cheng)鋼管信(xin)息的(de)自(zi)動讀取和收集,中控匯總(zong)鋼管的(de)過(guo)程(cheng)狀態信(xin)息,同時產品標識更加美觀、規范、準確。通過(guo)機(ji)(ji)器換(huan)人,降低工人勞(lao)動強度。


三、技術(shu)水平與業(ye)績


  自(zi)2015年投產(chan)以來,金(jin)洲管道以預精(jing)焊(han)(han)生產(chan)線為依托,成立了能(neng)源管道研究所(suo),焊(han)(han)接實驗室等研發部門(men),整(zheng)合公司優質(zhi)資源,通(tong)過(guo)自(zi)主創(chuang)新和產(chan)學(xue)研等方式,加快預精(jing)焊(han)(han)工藝(yi)技術消化吸收再創(chuang)新,先后(hou)試制進行了(le)(le)(le)φ1219mmx16.3mm、X90M,φ1219mmx22mm、X80M,ф1219m219mmx25.425.4mm、Q345B,φ508mmx6.4mm,X65M等(deng)(deng)規格,參與了(le)(le)(le)新粵(yue)浙管(guan)(guan)(guan)線φ1219x18.4,X80M管(guan)(guan)(guan)線的(de)單爐試制,在高(gao)鋼級大(da)壁厚的(de)螺旋不(bu)銹鋼焊(han)(han)管(guan)(guan)(guan)生產(chan)工(gong)藝上積累一定的(de)經(jing)驗。針對預(yu)焊(han)(han)飛(fei)濺、精焊(han)(han)質量(liang)、生產(chan)效(xiao)率等(deng)(deng)重點(dian)難點(dian)問題(ti),進行了(le)(le)(le)專(zhuan)項(xiang)技術(shu)攻(gong)關,通過多(duo)項(xiang)科研成果的(de)應用(yong),金洲管(guan)(guan)(guan)道(dao)(dao)預(yu)精焊(han)(han)工(gong)藝技術(shu)水平達(da)到國內(nei)領先水平。產(chan)品廣泛(fan)用(yong)于石油、天然(ran)氣(qi)(qi)輸送(song)、海(hai)底(di)管(guan)(guan)(guan)線、城市(shi)管(guan)(guan)(guan)網(wang)以及大(da)型鋼管(guan)(guan)(guan)樁管(guan)(guan)(guan)等(deng)(deng)領域。先后承(cheng)接(jie)了(le)(le)(le)惠州(zhou)海(hai)底(di)管(guan)(guan)(guan)道(dao)(dao)項(xiang)目、金麗溫(wen)省(sheng)級天然(ran)氣(qi)(qi)管(guan)(guan)(guan)道(dao)(dao)工(gong)程、海(hai)南環(huan)島(dao)管(guan)(guan)(guan)線工(gong)程、江陰燃(ran)氣(qi)(qi)管(guan)(guan)(guan)道(dao)(dao)工(gong)程、馬來西亞管(guan)(guan)(guan)網(wang)項(xiang)目、文萊管(guan)(guan)(guan)線項(xiang)目、伊(yi)朗管(guan)(guan)(guan)線項(xiang)目,以及港(gang)華燃(ran)氣(qi)(qi)、中燃(ran)燃(ran)氣(qi)(qi)、華潤燃(ran)氣(qi)(qi)等(deng)(deng)各(ge)大(da)城市(shi)管(guan)(guan)(guan)網(wang)工(gong)程。