API 5L Yeeb Nkab Qib: Lub zog ntaiv ntawm kab yeeb nkab
API 5L faib cov kab yeeb nkab los ntawm qhov tsawg kawg nkaus yield zog. X-tus lej yog lub zog tawm hauv ksi: X42 txhais tau tias 42 ksi (290 MPa), X52 txhais tau tias 52 ksi (360 MPa), thiab lwm yam. Cov qib sib txawv los ntawm qib qis A/B rau qis- kev pabcuam siab txog X80 (555 MPa) rau cov kab siab niaj hnub no -siab lub cev, nrog X90-X120 muaj nyob rau hauv cov ntawv tsis ntev los no rau ultra{17}}cov haujlwm siab.
1. Daim Ntawv Qhia Qib (PSL1 yam tsawg kawg nkaus)
| Qib | Yield zog (MPa / ksi) | Tensile zog (MPa / ksi) | Kev siv yam |
|---|---|---|---|
| Qib B | 245 / 35.5 | 415 / 60.2 | Tsawg- cov pa roj thiab cov kav dej |
| X42 | 290 / 42 | 415 / 60.2 | Nruab nrab - cov kav dej siab |
| X52 | 360 / 52.2 | 460 / 66.7 | Standard kis tau tus mob onshore |
| X60 | 415 / 60.2 | 520 / 75.4 | Siab -siab ntev- kab nrug |
| X65 | 450 / 65.3 | 535 / 77.6 | Offshore, siab -dhau cov roj kab |
| X70 | 485 / 70.3 | 570 / 82.7 | Niaj hnub nimno siab -pressure trunk pipelines |
| X80 | 555 / 80.5 | 625 / 90.6 | Ultra-siab-siab, loj- txoj kab uas hla |
2. Chemistry thiab ua raws qib
Cov qib siab ua tiav lub zog dhau losmicro-alloying (V, Nb, Ti)thiabThermomechanical tswj kev ua haujlwm (TMCP)ntau dua li cov pa roj carbon ntau. Carbon feem ntau capped ntawm 0.22-0.28% txawm rau X80, thaum manganese nce mus rau 1.7% thiab phosphorus thiab sulfur raug txwv rau 0.030% lossis nruj dua rau PSL2. Qhov kev tsim no ua kom cov qib siab dua weldable hauv thaj chaw - qhov ua ntej rau kev tsim cov kav dej ntev.
3. PSL1 vs PSL2
Txhua qib tuaj yeem txiav txim rau PSL1 lossis PSL2. PSL1 teeb tsa cov cuab yeej cuab tam yam tsawg kawg nkaus nrog kev sim yooj yim. PSL2 ntxiv cov txiaj ntsig siab tshaj plaws thiab lub kaus mom tensile, carbon- sib npaug qhov txwv, yuav tsum tau kuaj Charpy cuam tshuam, thiab 100% tsis yog- kuaj kev puas tsuaj - qib tshwj xeeb rau cov pa phom sij, offshore, thiab kev pabcuam qaub. PSL2 kuj tseem ua rau N, Q, thiab M xa cov xwm txheej uas lav kev puas ntsoog toughness.
4. Qib Xaiv Logic
Kev xaiv yog tsav los ntawm kev khiav hauj lwm siab, txoj kab uas hla, ib puag ncig, thiab txoj kev tsim kho: Qib B rau qis- kev siv hluav taws xob siab, X42-X52 rau nruab nrab- siab sib sau ua ke thiab kis tau tus mob, X60-X70 rau high-pressure ntev-ntev thiab offshore kev pab cuam, thiab X80 rau siab tshaj plaws throughput trunk kab. Tus nqi nce nrog qib, yog li qib qis tshaj plaws uas txaus siab rau cov qauv tsim thiab cov kev xav tau nruj yog feem ntau xaiv.
Cov lus nug nquag
Tus lej X txhais li cas hauv API 5L?
Tus lej X yog qhov tsawg kawg nkaus tawm lub zog hauv ksi - X52 txhais tau tias tsawg kawg yog 52 ksi (360 MPa) yield zog.
API 5L npog pes tsawg qib?
Cov ntsiab lus tseem ceeb yog Qib A, Qib B, X42, X46, X52, X56, X60, X65, X70 thiab X80, nrog cov qib siab dua hauv cov ntawv tsis ntev los no.
Qhov txawv ntawm PSL1 thiab PSL2 yog dab tsi?
PSL2 ntxiv lub kaus mom lub zog siab tshaj plaws, cov pa roj carbon- qhov sib npaug sib npaug, yuav tsum tau kuaj xyuas Charpy, thiab 100% NDT rau kev pabcuam tseem ceeb.
Puas yog qib siab dua ib txwm zoo dua?
Tsis muaj - qib siab dua tus nqi ntau dua thiab xav tau kev tswj kev vuam nruj dua; xaiv cov qib qis tshaj plaws uas ua tau raws li qhov xav tau ntawm kev tsim siab thiab toughness.
ISO 3183 sib npaug ntawm X52 yog dab tsi?
L360 - lub metric kev xaiv nrog tib yam 360 MPa yam tsawg kawg nkaus yield zog.
Cov qib siab dua puas yog weldable?
Yog - micro-alloying thiab TMCP kom cov pa roj carbon tsawg yog li qib mus txog X80 nyob twj ywm -weldable nrog cov txheej txheem tswj.
