Hauv cov ntsiab lus ntawmAPI 5L(tus qauv rau kab yeeb nkab),PSLsawv rauKhoom Specification Level.
Qhov txawv ntawmPSL 1thiabPSL 2yog qhov tseem ceeb ntawm qhov sib txawv ntawm kev ua tau zoo thiab kev ua haujlwm. PSL 1 yog tus qauv zoo rau kev siv dav dav, thaum PSL 2 yog qib siab dua nrog cov kev cai nruj dua rau cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, thiab kev sim.
Tsis kam them rau qhov tsis tsim nyog siab -kawg specifications!Tiv tauj pebtxhawm rau tshawb xyuas tus nqi-kev lag luam zoo-tawm cov kev daws teeb meem rau PSL 1 thiab PSL 2, uas tuaj yeem txuag koj txog li 15% ntawm cov nqi khoom siv.
Core Differences (Table Summary)
| Feature | PSL 1 | PSL 2 |
| Kev Pabcuam Ib puag ncig | Cov kev pabcuam dav dav | Stricter / Critical Service (Offshore, HPHT) |
| Tshuaj muaj pes tsawg leeg | Kev txwv dav dua | Kev txwv nruj heev (Carbon, Phosphorus, Sulfur) |
| Mechanical Strength | Tsuas yog qhov tsawg kawg nkaus yuav tsum tau | Yam tsawg kawg nkaus thiabQhov siab tshaj plawsYield xav tau |
| Kev ntsuam xyuas cuam tshuam | Tsis xav tau (tshwj tsis yog tau teev tseg) | Yuav tsum tau(Charpy V-Tswj) |
| NDT (Tsis yog -Kev puas tsuaj) | Tsuas yog rau cov qib tshwj xeeb | Yuav tsum taurau tag nrho cov kav dej |
| Weld Kho | Tso cai rau lub cev yeeb nkab | Txwv tsis pubpe cev |
| Traceability | Traceable rau "Tshav Kub" (Batch) | Traceable rau tus kheej cov yeeb nkab |
Cov ncauj lus kom ntxaws
A. Tshuaj muaj pes tsawg leeg
PSL 1:Tso cai rau ntau yam ntawm cov ntsiab lus. Weldability feem ntau yog zoo tab sis tsis nruj me ntsis lav rau huab cua.
PSL 2:Txwv tsis pub carbon, phosphorus, thiab sulfur cov ntsiab lus. Nws tseem caps lubCarbon sib npaug (CE). Qhov no ua rau PSL 2 yooj yim dua rau vuam thiab tsis tshua muaj kev tawg thaum lub sijhawm tsim kho.
B. Mechanical Properties
PSL 1:Tsuas yog txhais qhov tsawg kawg nkaus yield zog.
PSL 2:Txhais aMaximum Yield Strength. Vim li cas? Yog hais tias ib tug yeeb nkab muaj zog heev, nws yuav nkig. Cov kws tsim khoom xav tau cov yeeb nkab kom poob rau hauv ib qho "qhov rais" ntawm lub zog kom ntseeg tau tias tus cwj pwm zoo thaum khoov lossis hauv qab siab. PSL 2 kuj txwv covYield-rau-Tensile piv(ua kom cov yeeb nkab stretches ua ntej nws tawg).
C. Toughness (Charpy V-Kev ntsuas qhov ntsuas)
PSL 1:Tsis tas yuav muaj kev cuam tshuam los ntawm kev sim.
PSL 2: Yuav tsum tau. Qhov kev ntsuas no ntsuas cov yeeb nkab lub peev xwm los tiv thaiv "pob txha propagation" (piv txwv li, yog tias pib tawg, nws puas nres lossis tshuab qhib tag nrho cov kav dej?). Qhov no yog ib qho tseem ceeb rau siab - cov kab roj cua siab thiab qhov chaw txias.
D. Tsis yog-Kev kuaj kev puas tsuaj (NDT)
PSL 1:Tsuas yog qee yam ntawm cov kav dej (xws li seamless) lossis qee qib xav tau NDT.
PSL 2:Txhua lub yeeb nkab yuav tsum tau kuaj xyuas ultrasonic lossis radiographic (lossis lwm qhov kev pom zoo NDT) kom ntseeg tau tias tsis muaj qhov tsis xws luag hauv cov hlau lossis cov vuam.
E. Kho los ntawm Vuam
PSL 1:Yog tias pom muaj teeb meem nyob rau hauv cov hlau ntawm cov yeeb nkab lub cev, cov chaw tsim tshuaj paus feem ntau tso cai rau grind nws tawm thiab kho nws los ntawm vuam.
PSL 2: Tsis pub kho lub cev.Yog tias pom muaj qhov tsis xws luag hauv cov hlau ntawm PSL 2 yeeb nkab, tag nrho cov yeeb nkab sib txuas yuav tsum raug tsis lees paub lossis ntu txiav tawm. (Kev kho rau lub vuam seam tseem raug tso cai nyob rau hauv cov xwm txheej nruj).
Traceability
PSL 1:Tom qab cov kav dej tau ntim, lawv feem ntau raug txheeb xyuas los ntawm lawv "Tswj Kub Kub" (cov khoom siv hlau).
PSL 2:Traceability yog khaws cia thoob plaws hauv tag nrho cov txheej txheem tsim khoom. Txhua qhov sib koom ua ke ntawm cov yeeb nkab muaj qhov cim tshwj xeeb, tso cai rau koj taug qab nws rov qab mus rau qhov kev sim tshwj xeeb ntawm cov hlau tiag tiag.
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FAQ
PSL 2 txhais li cas?
PSL2 (Product Specification Level 2) yog cov khoom lag luam qib siab tshwj xeeb hauv API 5L tus qauv. Piv nrog rau PSL1, nws tsim cov kev cai nruj dua hais txog cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, thiab tsis yog- kev kuaj kev puas tsuaj, ua rau nws tsim nyog rau qhov xav tau kev pabcuam ib puag ncig uas muaj kev kub siab, tsis tshua muaj kub, lossis muaj corrosive.
PSL cov qauv yog dab tsi?
PSL (Product Specification Level) yog hais txog cov khoom tshwj xeeb cov qib uas tau teev tseg hauv API 5L tus qauv, siv los txheeb xyuas qhov zoo thiab kev soj ntsuam ntawm cov yeeb nkab kab. Nws feem ntau muab faib ua ob theem: PSL1 thiab PSL2.
- PSL1 yog qib pib; nws ua tau raws li tus qauv tsim nyog hais txog cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab, thiab tsim nyog rau cov roj thiab cov kav xa hluav taws xob ua haujlwm raws li kev pabcuam dav dav.
- PSL2 yog qib nruj dua uas yuav tsum tau nruj dua ntawm kev tswj cov tshuaj lom neeg muaj pes tsawg leeg, cuam tshuam qhov hnyav, thiab tsis yog - kuaj kev puas tsuaj. Nws yog tsim rau siv nyob rau hauv ib puag ncig hnyav, xws li cov uas muaj kev kub siab, tsis tshua muaj kub, los yog corrosive tej yam kev mob.
