Pipeline steel ke mofuta oa tšepe o sebelisetsoang ho etsa mekhoa ea ho tsamaisa lipeipi tsa oli le khase. Joalo ka sesebelisoa sa ho tsamaisa oli le khase ea tlhaho ka nako e telele, tsamaiso ea liphaephe e na le melemo ea moruo, polokeho le ho se sitisoe.
Tšebeliso ea tšepe ea pipeline
Pipeline tšepemefuta ea lihlahisoa e kenyelletsa liphaephe tsa tšepe tse se nang moeli le lipeipi tsa tšepe tse cheselitsoeng, tse ka aroloa ka mekhahlelo e meraro: libaka tsa alpine, libaka tse nang le sebabole se phahameng le ho behoa ha leoatle.
Liqholotso tse ngata tse tobaneng le tšepe ea liphaephe li kenyelletsa: boholo ba libaka tsa oli le khase li sebakeng sa polar, li-ice sheets, mahoatateng le libaka tsa maoatle, 'me maemo a tlhaho a batla a le boima; kapa e le ho ntlafatsa katleho ea lipalangoang, bophara ba pipeline bo lula bo atolosoa, 'me khatello ea ho fana e lula e eketseha.
Thepa ea tšepe ea Pipeline
Ho tsoa tlhahlobong e felletseng ea tsoelo-pele ea liphaephe tsa oli le khase, maemo a ho beoa ha liphaephe, mekhoa e ka sehloohong ea ho hloleha le lisosa tsa ho hloleha, tšepe ea liphaephe e lokela ho ba le thepa e ntle ea mochini (lerako le letenya, matla a phahameng, boima bo phahameng, ho hanyetsa ho roala), hape e lokela ho ba le bophara bo boholo, ho chesoa, serame le mocheso o tlase, ho hanyetsa kutu (SSCC) le ho hanyetsa metsi, joalo-joalo.
①Matla a holimo
Pipeline tšepe ha e hloke feela matla a phahameng a tensile le matla a tlhahiso, empa e boetse e hloka hore karolelano ea lihlahisoa e be sebakeng sa 0.85 ~ 0.93.
② Tšusumetso e matla
matla a phahameng a tšusumetso a ka finyella litlhoko tsa ho thibela ho phunyeha.
③Mocheso o tlase oa phetoho ea ductile-brittle
Libaka tse thata le maemo a leholimo a hloka tšepe ea liphaephe hore e be le mocheso o tlase o lekaneng oa ductile-brittle transition. The shear area ea DWTT (Drop Weight Tear Test) e fetohile index ea mantlha ea taolo ho thibela ho se sebetse hantle ha lipeipi.
④Ho hanyetsa ka mokhoa o babatsehang ho phunyeha ha hydrogen-induced cracking (HIC) le sulfide stress corrosion cracking (SSCC)
⑤ Ts'ebetso e ntle ea welding
Weldability e ntle ea tšepe e bohlokoa haholo ho netefatsa boleng ba tjheseletso ea phala.
Litekanyetso tsa tšepe tsa Pipeline
Hajoale, litekanyetso tsa mantlha tsa tekheniki tsa lipeipi tsa tšepe tsa phetisetso ea oli le khase tse sebelisoang naheng ea heso li kenyelletsaAPI 5L, DNV-OS-F101, ISO 3183, le GB/T 9711, joalo-joalo. Boemo bo akaretsang bo tjena:
① API 5L (litlhaloso tsa liphaephe tsa mohala) ke litlhaloso tse amoheloang hohle tse hlophisitsoeng ke Setsi sa Maine Petroleum.
② DNV-OS-F101 (tsamaiso ea liphaephe tse tsamaeang ka tlas'a metsi) ke tlhaloso e khethehileng e entsoeng ke Det Norske Veritas bakeng sa liphaephe tse tsamaeang ka tlas'a metsi.
③ ISO 3183 ke tekanyetso e hlophisitsoeng ke Mokhatlo oa Machabeng oa Boemo ba maemo mabapi le maemo a phano ea lipeipi tsa tšepe bakeng sa phetisetso ea oli le khase. Tekanyetso ena ha e kenyelle moralo le ho kenya lipeipi.
④ Phetolelo ea morao-rao ea GB/T 9711 ke mofuta oa 2017. Phetolelo ena e thehiloe ho ISO 3183:2012 le API Spec 5L 45th Edition. e ipapisitse le bobeli. Tumellanong le litekanyetso tse peli tse boletsoeng, maemo a mabeli a tlhahiso ea lihlahisoa a hlalositsoe: PSL1 le PSL2.PSL1 e fana ka boemo bo tloaelehileng ba phaephe ea mohala; PSL2 e eketsa litlhoko tse tlamang ho kenyelletsa sebopeho sa lik'hemik'hale, ho tiea ha li-notch, thepa ea matla le tlhahlobo ea tlatsetso e sa senyeheng (NDT).
API SPEC 5L le ISO 3183 ke litlhaloso tsa lipeipi tsa mela tse nang le tšusumetso lefatšeng ka bophara. Ka lehlakoreng le leng, lik'hamphani tse ngata tsa oli lefatšeng li tloaetse ho li sebelisaLitlhaloso tsa API SPEC 5L joalo ka lintlha tsa mantlha tsa ho reka lipeipi tsa tšepe.
Odara tlhahisoleseding
Konteraka ea taelo ea tšepe ea pipeline e lokela ho kenyelletsa lintlha tse latelang:
① Bongata (kakaretso ea boima kapa palo e felletseng ea lipeipi tsa tšepe);
② Boemo bo tloaelehileng (PSL1 kapa PSL2);
③Pipe ea tšepemofuta (o se nang seam kapapeipi e cheselitsoeng, ts'ebetso e khethehileng ea tjheseletsa, mofuta oa ho qetela oa pipe);
④Ho ipapisitsoe le maemo, joalo ka GB/T 9711-2017;
⑤ tšepe kereiti;
⑥Botenya ba kantle le botenya ba lebota;
⑦ Mofuta oa bolelele le bolelele (o sa sehiloeng kapa o sehiloeng);
⑧ Fumana tlhoko ea ho sebelisa sehlomathiso.
Limaraka tsa lipeipi tsa tšepe le limaraka tsa tšepe (GB/T 9711-2017)
| Normative levelsteel | sekhahla sa phala ea tšepe | tšepe kereiti |
| PSL1 | L175 | A25 |
| L175P | A25P | |
| L210 | A | |
| L245 | B | |
| L290 | X42 | |
| L320 | X46 | |
| L360 | X52 | |
| L390 | X56 | |
| L415 | X60 | |
| L450 | X65 | |
| L485 | X70 | |
| PSL2 | L245R | BR |
| L290R | X42R | |
| L245N | BN | |
| L290N | X42N | |
| L320N | X46N | |
| L360N | X52N | |
| L390N | X56N | |
| L415N | X60N | |
| L245Q | BQ | |
| L290Q | X42Q | |
| L320Q | X46Q | |
| L360Q | X52Q | |
| L390Q | X56Q | |
| L415Q | X60Q | |
| L450Q | X65Q | |
| L485Q | X70Q | |
| L555Q | X80Q | |
| L625Q | X90Q | |
| L690Q | X100M | |
| L245M | BM | |
| L290M | X42M | |
| L320M | X46M | |
| L360M | X52M | |
| L390M | X56M | |
| L415M | X60M | |
| L450M | X65M | |
| L485M | X70M | |
| L555M | X80M | |
| L625M | X90M | |
| L690M | X100M | |
| L830M | X120M |
Nako ea poso: Jan-30-2023