Kev Ua Txhaum Cai: L390 PSL1
1. "L390" - Qib Qib
"L": Sawv rauKab Yeeb. Qhov no tam sim ntawd qhia koj tias nws yog npaj rau cov kav dej.
"390": Tus lej no qhia txog qhovYam tsawg kawg nkaus Yield Strength (MYS)ntawm cov hlau. Unit yogMegapascals (MPa).
L390 txhais tau hais tias cov yeeb nkab muaj qhov tsawg kawg nkaus tawm lub zog ntawm 390 MPa(los yog kwv yees li56,500 psi).
Yield Strength yog ib qho cuab yeej cuab tam tseem ceeb. Nws yog qhov kev ntxhov siab uas cov khoom pib deform plastically (piv txwv li, nws yuav tsis rov qab mus rau nws cov duab qub thaum lub load raug tshem tawm). Rau cov kav dej, qhov no yog qhov tsim qauv tseem ceeb rau kev tiv thaiv sab hauv thiab cov khoom siv sab nraud.
2. "PSL1" - Cov Khoom Specification Level
Qhov no yog kev faib tawm hauv API 5L tus qauv uas txhais cov txheej txheem kev xa khoom thiab cov kev cai xeem.
PSL1 (Cov Khoom Qhia Tshwj Xeeb Qib 1)yog tus qauv, feem ntau theem. Nws muaj qhov sib npaug zoo ntawm lub zog thiab toughness rau ntau daim ntawv thov. Cov kav dej hauv PSL1 muaj:
Standard chemical muaj pes tsawg leeg yuav tsum tau.
Kev ntsuas cov cuab yeej cuab tam txheem (tensile thiab hardness).
Tsawg zog uas tsis yog -kev kuaj kev puas tsuaj (NDT) yuav tsum tau muab piv rau PSL2.
Tsis muaj qhov yuav tsum tau kuaj pob txha toughness (xws li Charpy V-Notch).
3. Txoj Cai Tswjfwm: API 5L
Thaum tsis nyob rau hauv lub npe, cov yeeb nkab no yog tsim raws li lubAmerican Petroleum Institute Specification 5L. Qhov no yog lub ntiaj teb no benchmark rau kab yeeb nkab, kom ntseeg tau zoo, kev ruaj ntseg, thiab interchangeability.
Cov yam ntxwv tseem ceeb ntawm L390 PSL1 Pipe
Khoom siv:Carbon Steel (tej zaum yuav muaj me me ntawm Manganese, Silicon, thiab lwm yam, rau lub zog thiab deoxidization).
Yam tsawg kawg nkaus Yield Strength:390 MPa (56,500 psi)
Yam tsawg kawg Tensile Strength:490 MPa (71,000 psi) - Qhov no yog qhov kev ntxhov siab uas cov khoom tawg.
Kev tsim khoom:Ua tauSeamless (S)los yogWelded (ERW, SAW).
Qhov ntau thiab tsawg:Muaj nyob rau hauv ntau yam ntawm Sab Nraud Diameters (OD) thiab Phab Ntsa Thicknesses (WT), teev los ntawm cov neeg siv khoom.
Sib piv: PSL1 vs. PSL2
Nws yog ib qho tseem ceeb kom nkag siab txog qhov sib txawv, vim tias PSL2 yuav tsum muaj rau kev xav tau ntau dua.
| Feature | PSL1 | PSL2 (Ntau zog) |
|---|---|---|
| Tshuaj muaj pes tsawg leeg | Txheem txwv. | Tighter tswj ntawm carbon sib npaug (CE) kom zoo weldability. Kev txwv ntawm Phosphorus & Sulfur rau kev txhim kho toughness. |
| Kev Xeem Toughness | Tsis yuam. | Yuav tsum tau.Charpy V-Kev ntsuas qhov cuam tshuam yuav tsum tau ua kom ntseeg tau tias cov yeeb nkab tuaj yeem tiv taus tawg hauv qhov txias txias. |
| Strength Variability | Kev hloov pauv muaj zog ntau dua raug tso cai. | Tighter tswj ntawm lub zog tawm los tiag (max{0}} MPa tshaj qhov min. tawm los). |
| Tsis yog -Kev kuaj kev puas tsuaj | Cov kev cai txheem. | NDT ntau dua (piv txwv li, ntawm tag nrho cov weld seam ntawm welded yeeb nkab). |
| Hydrostatic Test | Yuav tsum tau. | Yuav tsum tau. |
Tej kev siv
L390 PSL1 yog qib workhorse siv nyob rau hauv ntau yam ntawm onshore thiab offshore daim ntawv thov uas tsis tshua muaj siab - kub toughness tsis yog ib qho kev txhawj xeeb tseem ceeb:
Onshore Gathering Lines:Sau cov roj / roj los ntawm ntau lub qhov dej.
Dej Txhaj Kab:Rau cov roj theem nrab rov qab.
Tsawg-rau- Nruab Nrab Siab Hloov Cov kav dej.
Industrial Piping:Rau cov khoom siv cog qoob loo (dej, huab cua, thiab lwm yam).
Kev siv tus qauv:Qee zaum siv los ua piling lossis hauv cov txheej txheem ua haujlwm.
Vim Li Cas Koj Thiaj Xaiv L390 PSL1?
Tus nqi -Kev ua tau zoo:Nws feem ntau tsis tshua kim dua qib PSL2 vim tias tsis tshua muaj kev tsim khoom thiab kev sim cov cai.
Kev ua tau zoo txaus:Rau ntau yam uas tsis yog - tseem ceeb, nruab nrab - siab, thiab nruab nrab - qhov kub thiab txias, nws muab kev ua tau zoo thiab kev ntseeg tau zoo.
Muaj:Nws yog ib qib uas muaj ntau thiab dav tsim.
Thaum twg Koj Tsis Xaiv Nws? (Xaiv PSL2 Hloov)
Koj yuav qhia qib siab dua liL415 TSI 2los yogL450 PSL2thaum lub raj xa dej ua haujlwm nyob rau hauv ntau qhov kev xav tau, xws li:
Kev Pab Cuam:Muaj H₂S roj, uas tuaj yeem ua rau hydrogen-induced cracking (HIC) lossis sulfide stress cracking (SSC). PSL1 feem ntau tsis pom zoo rau kev pabcuam qaub.
Arctic los yog qis-Qhov chaw kub:Qhov twg fracture toughness yog ib qho tseem ceeb los tiv thaiv brittle fracture.
Siab -Npaj Siab, Siab -Volume Transmission Lines(piv txwv li, loj hla- lub teb chaws pipelines) qhov twg kev nyab xeeb thiab kev ncaj ncees yog qhov tseem ceeb.
Offshore Pipelines(tshwj xeeb tshaj yog subsea), qhov twg tsis ua hauj lwm yuav tshwm sim siab.
Cov ntsiab lus
L390 PSL1 Carbon Steel Kab Yeebyog ib qho kev txhim khu kev qha, tus nqi - zoo, thiab dav siv cov yeeb nkab qib uas txhais los ntawm API 5L tus qauv. Nws muaj qhov tsawg kawg nkaus tawm lub zog ntawm 390 MPa thiab ua tau raws li lub hauv paus (PSL1) cov cai rau cov khoom siv tshuaj thiab cov khoom siv kho tshuab. Nws yog ib qho kev xaiv tsim nyog rau ntau daim ntawv thov cov kav dej tab sis yuav tsum raug ntsuas tawm tsam PSL2 kev xaiv nruj dua rau qhov tseem ceeb, qis - qhov kub thiab txias, lossis qhov kev pabcuam qaub.
