Tom ntej: API 5L X60 PSL2 yog dab tsi?
Qhov no yog qib tshwj xeeb thiab cov lus qhia tshwj xeeb rau cov yeeb nkab steel siv feem ntau los thauj cov roj, roj, thiab lwm yam hydrocarbons nyob rau qhov ntev ntawm cov kav dej.
API 5L:Cov txheej txheem tsim tawm los ntawm American Petroleum Institute (API) uas qhia txog cov kev cai rau kev tsim khoom ntawm ob theem kev qhia tshwj xeeb (PSL 1 thiab PSL 2) ntawm seamless thiab welded steel yeeb nkab rau siv hauv cov kav dej hauv kev thauj mus los hauv kev lag luam roj av thiab roj av.
X60:Qib npe. Tus "X" sawv cev rau kab yeeb nkab steel, thiab "60" qhia aYam tsawg kawg nkaus lub zog ntawm 60,000 psi(414 MPa). Yield zog yog qhov kev nyuaj siab uas cov khoom pib deform plastically.
PSL2: Khoom Specification Qib 2. Qhov no yog cov txheej txheem nruj dua li PSL1, ua kom muaj kev sim siab dua, kev tswj cov tshuaj lom neeg nruj dua, thiab txhim kho cov khoom muaj zog kom ntseeg tau tias muaj kev ntseeg siab hauv cov ntawv thov ntau dua.
Cov yam ntxwv tseem ceeb thiab kev xav tau ntawm PSL2
PSL2 lub npe yog dab tsi ua rau cov yeeb nkab no haum rau qhov tseem ceeb, siab -siab, los yog ib puag ncig nyuaj (xws li thaj chaw offshore lossis arctic). Ntawm no yog cov kev txiav txim siab:
1. Tshuaj muaj pes tsawg leeg:
PSL2 txwv nruj rau cov khoom siv tshuaj los xyuas kom meej weldability, toughness, thiab lub zog. Cov kev tswj hwm tseem ceeb suav nrog:
Carbon sib npaug (CE):Cov kev txwv tau muab tso rau ntawm CE (xws li cov qauv zoo li CE Pcm lossis CE IIW) kom ntseeg tau tias cov hlau tau yooj yim weldable yam tsis muaj kev tsim cov microstructures brittle nyob rau hauv tshav kub- cuam tshuam cheeb tsam (HAZ).
Phosphorus thiab Sulfur:Cov kev txwv tsawg kawg nkaus (piv txwv li, P Tsawg dua lossis sib npaug rau 0.025%, S Tsawg dua lossis sib npaug li 0.015%) txhawm rau txhim kho toughness thiab txo qhov kev pheej hmoo ntawm kev tawg.
Micro{0}} alloying:Cov ntsiab lus zoo li Niobium (Nb), Vanadium (V), thiab Titanium (Ti) feem ntau ntxiv rau cov nqi kom ua tiav lub zog siab thiab tawv los ntawm kev ua kom zoo ntawm cov nplej.
2. Mechanical Properties:
Yield zog:Yam tsawg kawg nkaus 60,000 psi (414 MPa).
Tensile zog:Feem ntau yog nyob ntawm 75,000 psi (517 MPa) txog 110,000 psi (758 MPa). Qhov piv ntawm lub zog tawm los rau lub zog tensile kuj feem ntau tau teev tseg.
Elongation:Qhov tsawg kawg nkaus feem pua ntawm cov yeeb nkab yuav tsum ncab ua ntej tawg, qhia tias ductility.
3. Toughness yuav tsum tau:
Qhov no yog qhov sib txawv loj rau PSL2. Cov yeeb nkab yuav tsum tau musCharpy V-Ntch (CVN) Impact Testingkom ntseeg tau tias nws tuaj yeem nqus tau lub zog thiab tiv thaiv kev tawg ntawm qhov kub thiab txias. Qhov tsawg kawg nkaus absorbed zog yog teev raws li cov yeeb nkab qib thiab qhov loj.
4. Tsis yog -Kev Ntsuas Kev Ua Phem (NDT):
Txhua lub kav dej ntev yuav tsum raug nruj NDT:
Seamless Yeeb Nkab:Ultrasonic kuaj (UT) lossis kuaj electromagnetic.
Welded Yeeb Nkab:Tag nrho cov weld seam yuav tsum yog 100% tshuaj xyuas siv ultrasonic kuaj (UT) lossis radiography. Lub cev yeeb nkab kuj yuav tsum tau kuaj ultrasonic.
5. Kev Ntsuas Hydrostatic:
Txhua cov yeeb nkab yuav tsum tiv taus qhov ntsuas hydrostatic siab uas ua rau muaj kev ntxhov siab hauv cov yeeb nkab phab ntsa sib npaug rau qhov feem pua tau teev (piv txwv li, 95%) ntawm nws qhov kev txwv qhov tsawg kawg nkaus yield zog (SMYS) yam tsis muaj rupturing los yog rupturing.
Cov txheej txheem tsim khoom
API 5L X60 PSL2 yeeb nkab tuaj yeem ua tau raws li:
Seamless (S):Ua los ntawm piercing ib tug khoom billet ntawm steel. Tsis muaj weld seam. Feem ntau yog siv rau cov kab me me lossis cov ntawv thov siab dua.
Welded (W):Ua los ntawm kev tsim steel phaj los yog skelp mus rau hauv ib tug cylindrical zoo thiab vuam seam.
Electric Resistance Welded (ERW):Feem ntau rau qhov dav ntawm txoj kab uas hla.
Submerged Arc Welded (SAW):
Longitudinal (LSAW):Lub seam khiav parallel mus rau qhov ntev ntawm cov yeeb nkab. Feem ntau rau cov diameters loj.
Helical (HSAW / Kauv):Lub seam yog ib tug kauv. Tsawg dua rau siab - cov kab hauv siab tab sis siv rau dej, piling, thiab lwm yam.
Tej kev siv
API 5L X60 PSL2 yog qib workhorse rau kev lag luam hluav taws xob, siv hauv:
Siab -Natural Gas Transmission Pipelines
Crude Roj Transmission Pipelines
Sib sau kab(Txuas txuas qhov dej mus rau cov chaw ua haujlwm)
Offshore Pipelines(qhov twg toughness yog qhov tseem ceeb)
Cov kav dej hauv thaj chaw nyuaj rau thaj chaw(eg, seismic zones, arctic ib puag ncig)
Sib piv: PSL1 vs. PSL2 rau X60
| Feature | API 5L X60 PSL1 | API 5L X60 PSL2 |
|---|---|---|
| Tshuaj Tswj | Kev txwv dav dua, tsis tas yuav tsum tau CE. | Kev txwv nruj ntawm cov pa roj carbon, sulfur, phosphorus, thiab yuav tsum tau tswj hwm Carbon Equivalent. |
| Kev Xeem Toughness | Tsis yuam. | Yuav tsum tauCharpy V-Kev ntsuas qhov cuam tshuam. |
| Kev Ntsuas Lub Zog | Ib qho kev xeem rau ib qho. | Kev sim ntau zaus. |
| NDT Requirements | Tsawg nruj. | 100% NDTntawm weld seam (rau welded yeeb nkab) thiab feem ntau cov yeeb nkab lub cev. |
| Hydrostatic Test | Yuav tsum tau, tab sis tej zaum yuav muaj lwm txoj kev lees txais. | Yuav tsum tau rau txhua lub yeeb nkab uas tsis muaj kev zam. |
| Daim ntawv thov | Tsawg qhov tseem ceeb, tsawg-siab, tsis yog- thaj chaw muaj kev pheej hmoo. | Kev thov, siab -siab, thiab kev pabcuam tseem ceebdaim ntawv thov. |
Cov ntsiab lus
API 5L X60 PSL2sawv cev rau siab - kev ncaj ncees, siab - kev ua tau zoo pipeline steel. Qib "X60" muab qhov sib npaug ntawm lub zog thiab ductility, thaum lubPSL2specifications xyuas kom meej lub zog no yog ua ke nrog zoo heev toughness, weldability, thiab xyuas kom meej zoo los ntawm nws kim heev kev ntsuam xyuas. Nws yog cov khoom ntawm kev xaiv rau kev tsim kom muaj kev nyab xeeb thiab txhim khu kev qha lub zog hauv kev xav tau thoob ntiaj teb.
