Line Pipes Steels
Iingenelo: Amandla aphezulu, ubunzima, nobuchule bokugcina izinto eziphathekayo
Ukusetyenziswa okuqhelekileyo: imibhobho emikhulu yokuhambisa ioli kunye negesi
Impembelelo ye-molybdenum: ikhusela ukubunjwa kwe-perlite emva kokuqengqeleka kokugqibela, ukukhuthaza indibaniselwano elungileyo yamandla kunye nokuqina okuphantsi kobushushu.
Ngaphezulu kweminyaka engamashumi amahlanu, eyona ndlela inoqoqosho nesebenzayo yokuthutha irhasi yendalo kunye ne-oyile ekrwada kwimigama emide ngemibhobho eyenziwe ngentsimbi enobubanzi obukhulu. Le mibhobho mikhulu ububanzi ukusuka kwi-20″ ukuya ku-56″ (51 cm ukuya kwi-142 cm), kodwa ngokuqhelekileyo iyahluka ukusuka kwi-24″ ukuya kwi-48″ (61 cm ukuya kwi-122 cm).
Njengoko imfuno yamandla ehlabathi isanda kwaye amasimi amatsha erhasi afunyanwa kwiindawo eziya zisiba nzima nakwiindawo ezikude, imfuno yomthamo omkhulu wezothutho kunye nokhuseleko lombhobho olwandisiweyo luqhuba ukucaciswa koyilo lokugqibela kunye neendleko. Uqoqosho olukhula ngokukhawuleza olufana neTshayina, iBrazil kunye neIndiya ziye zandisa ngakumbi imfuno yemibhobho.
Imfuno yemibhobho yobubanzi obukhulu igqithise unikezelo olufumanekayo kwiindlela zokuvelisa eziqhelekileyo ezisebenzisa iiplate ezinzima kwi-UOE (U-forming O-forming E-expansion) imibhobho, ekhokelela kwiibhotile ngexesha lenkqubo. Ke ngoko, ukufaneleka kweetyhubhu ezinobubanzi obukhulu kunye ne-caliber-caliber spiral eveliswa kwimicu eshushu kuye kwanda kakhulu.
Ukusetyenziswa kwe-high-high-high-low-alloy steel (HSLA) yasungulwa kwi-1970 kunye nokuqaliswa kwenkqubo ye-thermomechanical rolling, edibanisa i-micro-alloying ne-niobium (Nb), i-vanadium (V). kunye / okanye i-titanium (Ti), evumela ukusebenza kwamandla aphezulu. intsimbi ephezulu inokuveliswa ngaphandle kwesidingo seendleko ezongezelelweyo zonyango lweenkqubo zonyango. Ngokuqhelekileyo, ezi zixhobo zokuqala ze-HSLA ze-tubular zazisekelwe kwi-pearlite-ferrite microstructures ukuvelisa iintsimbi ze-tubular ukuya kwi-X65 (ubuncinane bamandla okuvelisa i-65 ksi).
Ngokuhamba kwexesha, imfuno yemibhobho ephezulu-yamandla yakhokelela kuphando olubanzi kwiminyaka yee-1970 nakwiminyaka yokuqala yee-1980 ukuphuhlisa amandla e-X70 okanye ngaphezulu kusetyenziswa uyilo lwentsimbi ephantsi, uninzi lwazo zisebenzisa i-molybdenum-niobium alloy concept. Nangona kunjalo, ngokwaziswa kwetekhnoloji entsha yenkqubo efana nokupholisa okukhawulezileyo, kuye kwenzeka ukuba kuphuhliswe amandla aphezulu ngoyilo lwealloy oluthambileyo.
Nangona kunjalo, nanini na xa izingqusho eziqengqelekayo zingenakho ukusebenzisa amaxabiso okupholisa afunekayo kwitafile yokubaleka, okanye zingenazo nezixhobo zokupholisa ezikhawulezileyo, ekuphela kwesisombululo esisebenzayo kukusebenzisa izongezo ezikhethiweyo zezinto zokudibanisa ukuphuhlisa iipropati zentsimbi ezifunwayo. . Njengoko i-X70 iye yaba lihashe lomsebenzi weeprojekthi zemibhobho yangoku kunye nokwanda kokuthandwa kombhobho welayini ejikelezayo, imfuno yeepleyiti zegeyiji enzima neendleko ezisebenzayo kunye neekhoyili eziqengqelekayo eziveliswe kuzo zombini ii-Steckel Mills kunye ne-hot-strip mill yesiqhelo ikhule ngokumandla kwixesha elidlulileyo. iminyaka.
Kutshanje, iiprojekthi zokuqala ezinkulu ezisebenzisa i-X80-grade material kumgama omde wombhobho wobubanzi obukhulu zaye zafunyanwa e-China. Uninzi lwezixhobo zokusila ezibonelela ngezi projekthi zisebenzisa iikhonsepthi zengxubevange ezibandakanya ukongezwa kwemolybdenum esekwe kuphuhliso lwesinyithi olwenziwe ngeminyaka yoo-1970. Uyilo lwe-alloy esekwe kwi-Molybdenum lubonakalise ukubaluleka kwabo kwityhubhu ekhaphukhaphu yobude obuphakathi. Amandla okuqhuba apha kufakelo olusebenzayo lombhobho kunye nokuthembeka okuphezulu kokusebenza.
Ukususela ekuthengiseni, uxinzelelo lokusebenza lwemibhobho yegesi luye lwanda ukusuka kwi-10 ukuya kwi-120 bar. Ngokuphuhliswa kohlobo lwe-X120, uxinzelelo lokusebenza lunokwandiswa ngakumbi kwi-bar ye-150. Ukunyuka kweengcinezelo kufuna ukusetyenziswa kweepayipi zentsimbi kunye neendonga ezinzulu kunye / okanye amandla aphezulu. Ekubeni iindleko ezipheleleyo zezinto eziphathekayo zinokubalelwa ngaphezu kwe-30% yeendleko zepayipi ezipheleleyo zeprojekthi ye-onshore, ukunciphisa inani lensimbi esetyenziswa ngamandla aphezulu kunokubangela ukonga okukhulu.