I-Q345B enobubanzi obukhulu bepayipi lensimbi engenamthungo iwumkhiqizo wensimbi omude onengxenye engenalutho futhi engenayo imithungo, eyenziwe ngepayipi lensimbi elingenamthungo njengento eyisisekelo ngomdwebo ogoqayo noma obandayo. Uma kuqhathaniswa nezinto zensimbi eziqinile njengensimbi eyindilinga, amapayipi ensimbi yesikwele angenamthungo anobubanzi obukhulu alula ngesisindo lapho ukugoba namandla okugoqa kufana. Ziyinsimbi eyongayo futhi isetshenziswa kabanzi ekukhiqizeni izingxenye zesakhiwo nezingxenye zemishini.

Amapayipi ensimbi angenamthungo angu-Q345B anobubanzi obukhulu angahlukaniswa abe amapayipi ensimbi ayisikwele kanye namapayipi ensimbi anomumo okhethekile ngokuya ngobumo bendawo ehlukene. Uma ingxenye ephambanayo eyindilinga ingaphansi kwengcindezi ye-radial yangaphakathi noma yangaphandle, amandla ayafana. Ngakho-ke, iningi lamapayipi ensimbi angamapayipi ayindilinga. Kodwa-ke, amapayipi ayindilinga nawo anemikhawulo ethile. Isibonelo, ngaphansi kwesimo sokugoba indiza, ipayipi eliyindilinga ngeke Liqine njengamapayipi ensimbi angenamthungo wesikwele kanye namapayipi angama-rectangular emandleni okugoba. Amapayipi ayisikwele nawonxande avame ukusetshenziswa kweminye yemishini yezolimo, ifenisha yensimbi neyokhuni, njll. Amapayipi ensimbi anomumo okhethekile anamanye ama-cross-sectional shapes nawo ayadingeka ngokuya ngokusetshenziswa okuhlukene.

Yiziphi izinzuzo ze-Q345B ipayipi elikhulu lensimbi eliyisikwele?
1. Ingaphezulu le-Q345B lepayipi lensimbi eliyisikwele elinobubanzi obukhulu lihlala isikhathi eside futhi linempatho elwa nokugqwala kanye ne-anti-rust. Izinga le-oxidation ngeke lisheshe kakhulu futhi ukugqwala okumhlophe ngeke kwakheke epayipini lensimbi eliyisikwele.
2. Inezindawo ezilwa nokugqwala kanye nezindawo ezingagugi, okwenza ipayipi lensimbi elingenamthungo libe nempilo ende yesevisi.
3. Amapayipi ensimbi angenamthungo avikelekile. Ngemuva kokushisa, i-hot-dip galvanizing yenziwa endaweni ngayinye yepayipi yensimbi engenamthungo, futhi izikhundla ze-convex ne-concave zivikelekile.
4. Ngenxa yokuthi ipayipi yensimbi engenamthungo i-hot-dip galvanized ngaphandle, igcina isikhathi sokudweba noma ukuxubha, okwenza ukwakhiwa kube lula.
5. Amapayipi ensimbi afakwe emanzini ashisayo ngeke abe yiqhwa noma aphuke zingakapheli izinsuku ezingama-39, okuwenza afaneleke kakhulu ezifundeni ezisenyakatho.

Ngesikhathi sokwamukelwa kwephrojekthi ye-Q345B ipayipi yensimbi yesikwele esikhulu sobubanzi, kubalulekile ukunaka ukuhambisana kwamakhona amane, futhi ukuphambuka kwezinhlangothi ezine kungaphakathi kwesilinganiso sezinga likazwelonke. Izinga likazwelonke lokushintshwa kwamapayipi angenamthungo nesikwele nawonxande ngokuvamile lithi: GB/T3094-2008, futhi lisangaphakathi kwaleli zinga. Iphutha lobukhulu be-engeli engu-R lilungisiwe. Ipayipi yensimbi yesikwele ekhanyayo inamandla kakhulu kunepayipi yensimbi yesikwele se-seam eqondile ngokuphathelene nokucindezela kokuthwala. Intengo yepayipi yensimbi yesikwele ekhanyayo okungenani iphakeme kakhulu. Ipayipi yensimbi yesikwele ekhanyayo izoba neziphetho zamapayipi ngesikhathi sokucubungula. Endabeni yomsila oyisicaba, ukukhetha umsila kuyisinyathelo esengeziwe.

Kungani i-Q345B idinga ukuthunyelwa amapayipi ensimbi yesikwele anobubanzi obukhulu? Isizathu esiyinhloko siwukuba ngcono izinga Q345B square ububanzi amapayipi ensimbi square, kuhlanganise:
(1) Mayelana ne-carbon steel high kanye ne-high alloy steel, ukucisha kungathuthukisa amandla ako ukuze kuthuthukiswe ukubhola.
(2) Mayelana nensimbi enekhabhoni ephansi, ukucisha kungathatha indawo yokwelashwa kokushisa ukuze kulungiselelwe ukucishwa kwe-induction kunganciphisa ukuwohloka kwamapayipi angenamthungo futhi kunciphise izindleko zokukhiqiza.
(3) Ngokuphathelene nensimbi enekhabhoni ephezulu, ukucisha kungasusa uhlaka lwenethiwekhi lokusatshalaliswa kukasimende, okuzuzisayo ekwenzeni i-spheroidizing annealing.
(4) Emapayipini amakhulu naphakathi nendawo angenamthungo noma ama-castings ensimbi anezigaba eziguquguqukayo kakhulu, ukucisha kungasetshenziswa esikhundleni sokwelashwa kokushisa ukuze kuncishiswe ukuthambekela kokuguqulwa nokuqhekeka noma ukulungiselela ukwelashwa kokushisa.
(5) Izingxenye zamapayipi angenamthungo ezilwa nokulungisa eziphethwe ukushisa zingacinywa ukuze kuqedwe umonakalo ongaphezu kwezinga lokushisa ukuze zikwazi ukuphinda ziphathwe ukushisa.
(6) Isetshenziswa ku-aluminium die castings ukwandisa okuqukethwe kwe-ferrite evamile futhi ithuthukise amandla nokumelana nokugqokwa kokusakazwa.