Cov yam ntxwv tseem ceeb ntawm API 5L X42 PSL1
1. Mechanical Properties
Yield zog (min):42,000 psi (290 MPa)
Tensile zog (min):60,000 psi (414 MPa)
Elongation:Nws txawv nrog qhov loj ntawm cov yeeb nkab tab sis feem ntau yog nyob rau hauv thaj tsam ntawm 22-25%, qhia tau hais tias zoo ductility.
2. Chemical Composition (PSL1 tsis tshua muaj kev txwv)
Cov tshuaj muaj pes tsawg leeg rau PSL1 tsis yog tswj nruj raws li rau PSL2. Feem ntau cov feem pua ntawm cov ntsiab lus feem ntau yog:
Cov pa roj carbon (C):Tsawg dua lossis sib npaug li 0.28%
Manganese (Mn):Tsawg dua lossis sib npaug li 1.20%
Phosphorus (P):Tsawg dua lossis sib npaug li 0.030%
Sulfur (S):Tsawg dua lossis sib npaug li 0.030%
Qhov no yooj yim chemistry ua rau nws raug nqi -zoo los tsim.
3. Cov txheej txheem tsim khoom
API 5L X42 PSL1 yeeb nkab tuaj yeem tsim nyob rau hauv ob txoj hauv kev:
Seamless (SMLS):Ua los ntawm piercing ib tug khoom billet ntawm steel. Nws tsis muaj seam thiab feem ntau muaj zog thiab siv rau siab dua - cov ntawv thov siab.
Welded (ERW - Electric Resistance Welded):Ua los ntawm dov lub steel kauj rau hauv lub tog raj kheej thiab vuam cov seam. Qhov no yog cov txheej txheem kev lag luam ntau dua thiab tsim nyog rau ntau daim ntawv thov siab.
4. Kev kuaj thiab tshuaj xyuas
Raws li PSL1 cov khoom lag luam, qhov kev sim xav tau yog qhov tseem ceeb:
Hydrostatic Test:Txhua qhov ntev ntawm cov yeeb nkab raug sim rau lub siab uas ua rau muaj kev ntxhov siab nyob rau hauv qhov kev taw qhia ntawm hoop ntawm ib feem pua ntawm cov khoom muaj zog. Qhov no ua kom lub siab ncaj ncees.
Tsis yog-Kev kuaj kev puas tsuaj (rau Welded Pipe):Lub weld seam ntawm ERW kav yog tshuaj xyuas siv ultrasonic lossis electromagnetic txoj kev los xyuas kom meej tias tsis muaj qhov tsis xws luag.
*(Ceeb Toom: PSL2 yuav tsum muaj kev sim ntau yam ntxiv, suav nrog Charpy V-Kev ntsuas qhov cuam tshuam rau qhov hnyav, nruj dua tsis yog- kuaj kev puas tsuaj, thiab ntau qhov sib txawv ntawm cov tshuab ntsuas ntau zaus.)*
Tej kev siv
API 5L X42 yog ntau yam haujlwm ua haujlwm qib siv hauv:
Onshore thiab Offshore Roj & Gas Sib Sau Kab:Kev thauj cov roj av thiab cov nkev ntuj los ntawm lub qhov dej mus rau qhov chaw ua haujlwm.
Tsawg mus rau nruab nrab- Cov kav xa hluav taws xob siab:Rau kev faib cov pa roj carbon monoxide mus ntev.
Dej Txhaj Kab:Siv nyob rau hauv cov roj teb los tswj lub reservoir siab.
Kev siv tus qauv:Qee lub sij hawm siv rau piling, casing, los yog lwm yam structural lub hom phiaj uas nws txhua yam khoom txaus, tab sis nws tsis yog tsim los rau qhov no.
Qhov zoo thiab qhov txwv
| Qhov zoo | Kev txwv |
|---|---|
| Tus nqi -zoo:Yooj yim chemistry thiab PSL1 cov kev cai ua rau nws tsis tshua kim dua cov qib siab lossis PSL2. | Lub zog qis:Tsis haum rau siab -siab (piv txwv li, dej tob, siab -siab kis) daim ntawv thov qhov twg X52, X65, lossis qib siab dua yuav tsum tau. |
| Zoo Weldability thiab Ductility:Cov ntsiab lus qis carbon tsawg ua rau nws yooj yim rau vuam thiab tsim hauv daim teb. | Lower Toughness:PSL1 tsis muaj qhov yuav tsum tau ua kom muaj zog (kev cuam tshuam), ua rau nws muaj peev xwm ua rau tawg tawg hauv qhov chaw txias. |
| Pov thawj Reliability:Lub sijhawm ntev - sawv, zoo- nkag siab qib rau nws cov ntawv thov. | Tsawg Stringent Quality Control:Piv rau PSL2, cov khoom siv tshuaj lom neeg thiab cov cuab yeej tswj tau yooj yim dua. |
Sib piv: PSL1 vs PSL2 (rau X42)
| Feature | PSL1 | PSL2 |
|---|---|---|
| Yield / Tensile zog | Txhais | Txhais, nrog rau cov cai ntxiv (piv txwv li, max. yield zog, max. Y / T ratio) |
| Toughness (Impact Test) | Tsis xav tau | Yuav tsum tau(Charpy V-Ntxoov ntxoo) |
| Tshuaj muaj pes tsawg leeg | Kev txwv dav dav, Carbon Equivalent (CE) tsis tas yuav tsum tau ua | Tighter txwv,CE yog qhov yuav tsum tau uarau weldability tswj |
| Tsis yog -Kev kuaj kev puas tsuaj | Nyob rau hauv weld seam ntawm welded yeeb nkab xwb | NDT ntau dua ntawm cov vuam seam thiab rau SMLS yeeb nkab |
| Kos npe | Txuj | Cov ncauj lus kom ntxaws ntxiv, suav nrog tus lej xov tooj cua sov thiab PSL2 tus qauv |
Xaus
API 5L X42 PSL1yog ib qho tseem ceeb, kev lag luam, thiab siv dav siv carbon steel yeeb nkab qib. Nws yog ib qho kev xaiv zoo tshaj plaws rau qis- mus rau- cov ntawv thov kev thauj mus los ntawm cov dej siab nruab nrab uas qhov siab tawv tsis yog qhov yuav tsum tau ua. Nws qhov yooj yim, zoo weldability, thiab tus nqi-kev ua tau zoo tau ua rau nws yog ib qho tseem ceeb hauv lub zog thiab kev lag luam rau ntau xyoo lawm. Rau cov kev pabcuam uas xav tau ntau dua (piv txwv li, Arctic ib puag ncig, siab- cov pa xa hluav taws xob), qib siab dua li X65 lossis PSL2 cov khoom yuav raug teev tseg.
