Tom ntej: L360 PSL2 Pipe yog dab tsi?
L360:Qib npe. "L" sawv cev rau Kab Yeeb. "360" qhia lubYam tsawg kawg nkaus Yield Strengthyog 360 MPa (los yog ~ 52,200 psi). Qhov no yog theem kev ntxhov siab txog qhov uas cov hlau yuav deform elastically thiab rov qab mus rau nws cov duab qub. Tshaj qhov no ua rau deformation mus tas li.
PSL2:Yam khoom Specification Level. PSL2 yog cov txheej txheem nruj dua li PSL1, suav nrog kev tswj nruj dua ntawm cov tshuaj lom neeg muaj pes tsawg leeg, cov khoom siv kho tshuab, thiab yuav tsum tsis yog - kuaj kev puas tsuaj. Nws yog tsim los rau kev thov ntau dua.
Hauv luv luv,L360 PSL2 yog lub siab - lub zog, siab - zoo steel yeeb nkab tsim los thauj roj, roj, thiab lwm yam hydrocarbons nyob rau hauv siab.
Cov yam ntxwv tseem ceeb thiab kev xav tau (PSL2 vs. PSL1)
Lub npe PSL2 yog qhov teeb tsa cov yeeb nkab no sib nrug. Nov yog yuav ua li cas nws txawv ntawm qhov yooj yim PSL1 yeeb nkab:
| Feature | L360 PSL1 | L360 PSL2 | Vim Li Cas Nws Tseem Ceeb rau PSL2 |
|---|---|---|---|
| Yield zog | 360 MPa (min) | 360 MPa (min) | Tib lub hauv paus yuav tsum tau, tab sis PSL2 muaj kev tswj nruj dua. |
| Tensile zog | 460-760 MPa | 460-760 MPa | Tib yam, tab sis PSL2 muaj kev ntsuas nruj dua. |
| Tshuaj muaj pes tsawg leeg | Tsawg nruj tswj. | Kev tswj nrujnyob rau hauv carbon, manganese, sulfur, thiab phosphorus. Feem ntau tau ntxiv micro- alloying ntsiab xws li Niobium (Nb), Vanadium (V), lossis Titanium (Ti). | Txhim khoweldability, tawv, thiab tiv tausHydrogen Induced Cracking (HIC)thiabSulfide Stress Cracking (SSC). |
| Charpy Impact Test | Tsis yuam. | Yuav tsum tau.Yuav tsum ua kom tau raws li qhov tsawg kawg nkaus absorbed zog ntawm qhov ntsuas kub. | Xyuas kom cov hlau tuaj yeem tiv taus cov khoom thauj (piv txwv li, los ntawm kev tsim kho lossis cov khoom poob) yam tsis muaj pob txha tawg, tshwj xeeb tshaj yog nyob rau hauv qhov chaw txias. |
| Tsis yog -Kev Ntsuas Kev Puas Tsuaj (NDT) | Limited NDT ntawm lub vuam seam. | Yuav tsum tau 100% NDTntawm tag nrho cov yeeb nkab lub cev (feem ntau yog kuaj ultrasonic). | Ua kom muaj kev ncaj ncees ntawm tag nrho cov yeeb nkab, kuaj pom qhov tsis zoo sab hauv lossis sab nraud uas tuaj yeem ua rau tsis ua haujlwm. |
| Hydrostatic Test | Yuav tsum tau. | Yuav tsum tau, feem ntau ntawm kev ntsuas siab dua. | Txheeb xyuas qhov siab- muaj peev xwm ntawm txhua lub kav dej. |
Common Manufacturing Txheej txheem
L360 PSL2 yeeb nkab feem ntau yog tsim los siv ib qho ntawm ob txoj hauv kev:
Seamless (SMLS):Cov yeeb nkab yog tsim los ntawm cov khoom siv hluav taws xob uas tau tho thiab dov mus rau hauv ib qho hollow seem. Nws tsis muaj weld seam.
Qhov zoo:Uniform lub zog nyob ib ncig ntawm lub ncig, tsis muaj zog taw tes los ntawm ib tug weld.
Qhov tsis zoo:Feem ntau kim kim thiab txwv nyob rau hauv loj heev diameters.
Electric Resistance Welded (ERW) / Siab -Frequency Welded (HFW):Lub phaj hlau los yog kauj yog dov rau hauv lub tog raj kheej thiab cov seam yog welded siv cov hluav taws xob tam sim no.
Qhov zoo:Tus nqi - zoo rau siab - ntim ntau lawm thiab muaj nyob rau hauv cov kab uas loj dua.
Qhov tsis zoo:Lub tshav kub- cuam tshuam cheeb tsam (HAZ) ntawm cov vuam tuaj yeem yog thaj tsam ntawm qhov tsis muaj zog yog tias tsis tswj tau zoo (txawm tias cov txheej txheem ERW niaj hnub no zoo heev).
Daim ntawv thov
L360 PSL2 yeeb nkab yog cov neeg ua haujlwm ntawm lub zog, siv hauv:
Onshore thiab Offshore Gas Transmission Pipelines
Crude Roj Transmission Pipelines
Cov kav dej(piv txwv li, rau diesel, roj av)
Carbon Dioxide (CO2) Cov kav dej thauj mus los
Dej Txhaj Kabnyob rau hauv cov roj teb
Sib sau kabuas coj cov khoom los ntawm lub qhov dej mus rau cov chaw ua haujlwm
Cov qauv tsim nyog
Cov yeeb nkab no feem ntau yog tswj hwm los ntawm covAPI 5L specification(American Petroleum Institute).
Tus qauv txhais yog API 5L.Cov ntaub ntawv no qhia txog txhua yam uas yuav tsum tau muaj rau cov khoom siv tshuaj lom neeg, kev siv tshuab, thiab qhov loj me, nrog rau cov txheej txheem kuaj thiab tshuaj xyuas rau PSL1 thiab PSL2.
Nws feem ntau tau ntxiv los ntawm qhov project- cov kev cai tshwj xeeb los ntawm cov tuam txhab engineering.
Vim li cas thiaj xaiv L360 PSL2?
Koj yuav qhia L360 PSL2 tshaj qib qis lossis PSL1 rau ntau qhov laj thawj tseem ceeb:
Kev nyab xeeb thiab kev ncaj ncees:Qhov yuav tsum tau Charpy cuam tshuam kev kuaj thiab 100% NDT txo qhov kev pheej hmoo ntawm cov kav dej tsis ua haujlwm.
Sour Service Muaj peev xwm:Cov tshuaj chemistry tswj (tsawg leej faj) ua rau nws haum rau ib puag ncig uas muajH₂S (kua roj), raws li nws resists HIC thiab SSC.
Weldability:Kev tswj cov pa roj carbon sib npaug (CE) kom ntseeg tau tias cov yeeb nkab tuaj yeem welded nyob rau hauv lub tshav pob yam tsis muaj kev tsim microstructures nyob rau hauv vuam, uas yog ib qho tseem ceeb rau kev tsim kho.
Kev ua tau zoo hauv Harsh Environments:Qhov lav tau zoo yog qhov tseem ceeb rau cov kav dej ua haujlwm hauv cov huab cua txias (arctic lossis sub- daim ntawv thov dej hiav txwv).
Cov ntsiab lus
L360 PSL2 Carbon Steel Kab Yeebsawv cev rau qeb hwm ntawm cov raj xa dej uas sib npaug siab zog nrog zoo heev toughness, weldability, thiab tsis kam mus rau corrosive ib puag ncig. Nws cov qauv kev tsim khoom thiab kev sim nruj, uas tau txiav txim los ntawm qib PSL2, ua rau nws nyiam thiab feem ntau yuav tsum tau xaiv rau niaj hnub, siab -siab, thiab tseem ceeb roj thiab roj kis tau tus mob tej yaam num uas muaj kev ruaj ntseg thiab ntev - lub sij hawm kev cia siab yog qhov tseem ceeb.
