X42 pipeline steel yog cov khoom siv tseem ceeb hauv kev thauj mus los ntawm cov roj thiab roj, thiab nws cov txheej txheem tsim khoom thiab cov qauv kev qhia ncaj qha cuam tshuam rau kev nyab xeeb thiab kev lag luam ntawm kev thauj mus los ntawm lub zog. Raws li API 5L cov qauv, X42 belongs rau qhov nruab nrab - lub zog pipeline steel series, nrog qhov tsawg kawg nkaus yield zog ntawm 290 MPa (42 kb / sq inch), thiab yog dav siv nyob rau hauv onshore thiab subsea roj thiab roj tej yaam num thauj mus los. Qhov no welded yeeb nkab, uas tsim los siv seamless los yog ncaj seam kuj welding (ERW) / submerged arc vuam (SAW) cov txheej txheem, tau qhia tshwj xeeb zoo technology nyob rau hauv loj zog tej yaam num nyob rau hauv domestic thiab thoob ntiaj teb.
Chemical Composition rau X42 PSL 1 yeeb nkab
Chemical Composition rau X42 PSL 2 yeeb nkab
API 5L X42 Mechanical Property
Qhov txawv ntawm API 5L GR B thiab X42 yog dab tsi?
| Dimension | API 5L X42 | API 5L GRB |
|---|---|---|
| Lub zog | Yield Strength Ntau dua los yog sib npaug rau290 MPa rau | Yield Strength Ntau dua los yog sib npaug rau245 MPa rau |
| Toughness | Yuav tsum tauNtau tshaj lossis sib npaug rau 27J @ -20 degreecuam tshuam lub zog | Tsis tshua muaj -kub toughness yuav tsum tau |
| Kev tswj hwm kev sib xyaw | Yuav tsum tau ntxivNb/V microalloying ntsiab | Microalloying cov ntsiab lus xaiv tau |
| Siv Tau Siab | Nruab nrab -siab siab (>8 MPa) | Tsawg siab(tsawg dua lossis sib npaug li 6 MPa) |
| Tus nqi Lifecycle | Kev lag luam ntau duanyob rau hauv qaub roj / qis- qhov kub thiab txias | 5-8% txo tus nqi yuav khoomnyob rau hauv ambient/clean tej yam kev mob |
Vim li cas thiaj xaiv X42?
Siab - yuav tsum muaj siab: Tsim siab Ntau dua los yog sib npaug rau 7 MPa (piv txwv li, cov kab hluav taws xob lub cev)
Tsawg- qhov kub thiab txias: Yam tsawg kawg nkaus kub tsawg dua los yog sib npaug rau 0℃(permafrost / txias cheeb tsam tej yaam num)
Corrosion txaus ntshai: Media muaj H₂S/CO₂ (tseem ceeb rau hydrogen-induced cracking resistance)
Case Study: Ib txoj haujlwm xa hluav taws xob hauv Kazakhstan tau ntsib kev tawg ntawm -15℃thaum siv GR.B. Hloov mus rau X42 txo tus nqi kho txhua xyoo los ntawm 70%.
Vim li cas thiaj xaiv GR.B?
Tsawg-siab networks: Tsim siab Tsawg dua los yog sib npaug li 5 MPa (lub nroog cov pa xa hluav taws xob / cov kav dej txhaj tshuaj)
Cov cheeb tsam kub: Ambient temperature >5℃thiab tsis yog -corrosive media
Tus nqi -sensitive: Tight luv- lub sij hawm siv nyiaj thiab kev ua haujlwm me me
