Ua ke PSL2 Kev Ncaj Ncees nrog Kauv Vuam
Kauv submerged arc welded yeeb nkab yog tsim los ntawm steel kauj mus rau hauv lub helix thiab welded raws cov kauv seam ntawm ob sab. Thaum tsim los rau API 5L PSL2, txhua qhov ntev yuav tsum ua kom txaus siab qhov yuav tsum tau kuaj xyuas, nruj chemistry txwv thiab txhim kho traceability. Qhov tshwm sim yog qhov loj - kab kab yeeb nkab nrog cov ntaub ntawv toughness rau kev pabcuam tseem ceeb.
PSL2 SSAW yeeb nkab yog dav tsim nyob rau hauv qib X42 txog X80, nrog X60, X65 thiab X70 dominating lub ntsiab kis tau tus mob tej yaam num. Cov txheej txheem kauv tso cai rau txoj kab uas hla mus txog li 3,000 hli los ntawm cov coil nqaim, uas yog vim li cas nws yog qhov kev xaiv tus qauv rau ntev - kab hauv kab.
Mechanical Properties ntawm Common PSL2 Qib
| Qib | Yield zog, min MPa | Tensile zog, MPa | Yield rau Tensile Ratio, max |
|---|---|---|---|
| B | 245 | 415-655 | 0.93 |
| X42 | 290 | 415-655 | 0.93 |
| X52 | 360 | 460-760 | 0.93 |
| X60 | 415 | 520-760 | 0.93 |
| X65 | 450 | 535-760 | 0.93 |
| X70 | 485 | 570-760 | 0.93 |
Rau PSL2, qhov tawm los rau qhov sib piv tensile yog capped los lav kom txaus ductility, thiab Charpy V-notch impact testing yog ua nyob rau ntawm qhov ntsuas kub tsim rau txhua qhov kub thiab phab ntsa thickness ua ke.
Chemistry Control thiab Weld Integrity
| Element | X65 thiab X70 Hom Max | Lub hom phiaj |
|---|---|---|
| Cov pa roj carbon | 0.12% | Txwv hardness thiab txhim kho weldability |
| Manganese | 1.45-1.65% | Lub zog thiab toughness |
| Phosphorus | 0.025% | Tiv thaiv brittleness |
| Sulfur | 0.015% | Txhim kho HIC tsis kam |
| Carbon sib npaug CE | 0.43 max | Guarantees teb weldability |
Tag nrho cov kauv vuam ntev yog tshuaj xyuas los ntawm kev kuaj ultrasonic lossis radiographic kuaj. Tsis tas li ntawd, txhua cov yeeb nkab yog kuaj hydrostatically thiab lub hauv paus hlau thiab vuam raug txheeb xyuas los ntawm tensile, hardness thiab flattening tests. Rau kev pabcuam qaub, ntxiv HIC thiab SSC kuaj raws NACE cov qauv muaj.
Daim ntawv thov
PSL2 SSAW yeeb nkab yog siv nyob rau hauv siab - siab onshore gas kis kab, crude roj trunk kab, hla- lub teb chaws cov kav dej, piling rau marine lug thiab tej yaam num nrog puas ntsoog cov phiaj xwm. Nws kuj raug xaiv rau cov kev pabcuam arctic thaum qhov ntsuas kub Charpy tau teev tseg.
FAQ
Q1. Cov qib dab tsi muaj nyob hauv PSL2 SSAW yeeb nkab?
Cov qib feem ntau suav nrog X42, X46, X52, X56, X60, X65, X70 thiab X80, nrog X60 txog X70 feem ntau raug rau loj - txoj kab uas hla roj.
Q2. Vim li cas qhov weld seam kuaj 100 feem pua?
Kauv seam yog txoj hauv kev tseem ceeb rau kev siab ncaj ncees. Tag nrho -ntev ultrasonic lossis radiographic kuaj xyuas kom tsis muaj qhov cuam tshuam loj ntawm qhov kev khiav dim.
Q3. Dab tsi yog qhov yuav tsum tau muaj cov pa roj carbon sib npaug?
PSL2 txwv qhov sib npaug ntawm cov pa roj carbon monoxide, feem ntau yog 0.43 qhov siab tshaj plaws los ntawm IIW mis, kom ntseeg tau tias cov yeeb nkab tuaj yeem welded hauv thaj teb tsis muaj hydrogen tawg.
Q4. PSL2 SSAW yeeb nkab puas tuaj yeem siv rau hauv kev pabcuam qaub?
Yog lawm, thaum txiav txim nrog cov kev xav tau ntxiv nrog rau kev txwv hardness, HIC kuaj ib NACE TM0284 thiab chemistry tsim los rau ntub H2S ib puag ncig.
Q5. Qhov siab tshaj plaws ntawm PSL2 SSAW yeeb nkab yog dab tsi?
Kauv welded yeeb nkab muaj txog li ntawm 3,000 hli sab nraud txoj kab uas hla, nrog phab ntsa thicknesses feem ntau ntawm 6 hli mus rau 25 hli nyob ntawm qib thiab qhov project.
Q6. Yuav ua li cas toughness xyuas?
Cov tawv tawv tau txheeb xyuas los ntawm Charpy V- qhov ntsuas qhov cuam tshuam ntawm qhov ntsuas kub, feem ntau yog qhov ntsuas kub ntawm 0 txog -45 ° C, nrog cov txiaj ntsig tau sau rau ntawm daim ntawv pov thawj zeb.
