Kodi "Pipeline Steel" ndi chiyani?

Kugwiritsa ntchito chitsulo chapaipi

Chitsulo cha bombamafomu opangira mankhwala akuphatikizapo mapaipi achitsulo osasunthika ndi mapaipi achitsulo otsekemera, omwe amatha kugawidwa m'magulu atatu: mapiri a alpine, madera a sulfure ndi malo omwe ali ndi nyanja.

Mavuto ambiri omwe amakumana nawo ndi zitsulo zamapaipi akuphatikizapo: madera ambiri a mafuta ndi gasi ali m'madera a polar, madzi oundana, zipululu, ndi nyanja, ndipo zachilengedwe zimakhala zovuta kwambiri; kapena pofuna kupititsa patsogolo kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe kake, kukula kwa payipi kumakulitsidwa nthawi zonse, ndipo mphamvu yobweretsera ikuwonjezeka nthawi zonse.

Mtengo wa Pipeline Steel Properties

Kuchokera pakuwunika kwachitukuko cha mapaipi amafuta ndi gasi, kuyika mapaipi, njira zazikulu zolephereka komanso zolephera, zitsulo zamapayipi ziyenera kukhala ndi zida zabwino zamakina (khoma wandiweyani, kulimba kwambiri, kulimba kwambiri, kukana kuvala), komanso kukhala ndi mainchesi akulu, kukhazikika, kuzizira komanso kutentha pang'ono, kukana kwa dzimbiri (CO2), kukana kukana kwamadzi (SSCC ndi HIC, etc.)

①Kulimba mtima

Chitsulo cha chitoliro sichimangofunika kulimba kwambiri komanso mphamvu zokolola, komanso zimafuna kuti chiŵerengero cha zokolola chikhale mumtundu wa 0,85 ~ 0,93.

② Kukhazikika kwakukulu

kulimba kwamphamvu kumatha kukwaniritsa zofunikira zopewera kusweka.

③Kutentha kotsika kwa ductile-brittle transition

Madera ovuta komanso nyengo zimafunikira chitsulo chapaipi kuti chikhale ndi kutentha kocheperako kocheperako. Dera lometa ubweya la DWTT (Drop Weight Tear Test) lakhala cholozera chachikulu choletsa kulephera kwa mapaipi.

④Kukana kwabwino kwa hydrogen-induced cracking (HIC) ndi sulfide stress corrosion cracking (SSCC)

⑤ Kuchita bwino kwa kuwotcherera

Weldability wabwino wa zitsulo n'kofunika kwambiri kuonetsetsa umphumphu ndi kuwotcherera khalidwe payipi.