Tom ntej: L290 PSL1
"L": Sawv rau "Line Pipe" steel.
"290": Qhia covYam tsawg kawg nkaus Yield Strength (YS)ntawm cov hlau, uas yog 290 Megapascals (MPa) lossis kwv yees li 42,000 Pounds ib Square Inch (psi). Qhov no yog cov cuab yeej cuab tam tseem ceeb.
"PSL": Sawv rauKhoom Specification Level. PSL1 yog tus qauv, theem pib ntawm kev xav tau.
Hauv cov ntsiab lus yooj yim,L290 PSL1 yog ib qho dav dav - lub hom phiaj, siab - zog, carbon-manganese steel yeeb nkab siv los tsim cov kav dej.
Cov yam ntxwv tseem ceeb thiab Specifications
1. Mechanical Properties
Lub npe "L290" feem ntau txhais nws lub zog txhua yam.
Yam tsawg kawg nkaus Yield Strength (YS):290 MPa (42,000 psi)
Qhov no txhais li cas:Qhov no yog qhov siab tshaj plaws ntawm cov hlau tuaj yeem tiv taus yam tsis muaj deformation mus tas li. Nws yog ib qho tseem ceeb hauv kev txiav txim siab cov yeeb nkab siab - muaj peev xwm.
Yam tsawg kawg Tensile Strength (TS):415 MPa (60,200 psi)
Qhov no txhais li cas:Qhov no yog qhov siab tshaj plaws uas cov hlau tuaj yeem tiv taus thaum ncab lossis rub ua ntej caj dab thiab tawg.
Yield -rau-Tensile Ratio (Y/T):Tsis tau teev rau PSL1. Qhov no yog qhov sib txawv tseem ceeb los ntawm cov qib siab PSL2, qhov uas tswj qhov piv txwv no yog qhov yuav tsum tau ua kom ntseeg tau tias qhov deformability zoo dua.
2. Chemical Composition (PSL1 vs. PSL2)
Rau PSL1, cov tshuaj muaj pes tsawg leeg (cov Carbon, Manganese, thiab lwm yam) yogtsis nruj me ntsis raws li tus qauv. Cov chaw tsim khoom muaj qhov yooj yim dua kom ua tiav cov khoom siv kho tshuab uas xav tau (290 MPa YS) siv cov qauv carbon-manganese steel.
Ib yam PSL1 chemistry yuav zoo li:
Cov pa roj carbon (C):0.22% max
Manganese (Mn): ~0.90% - 1.25%
Lwm cov ntsiab lus:Silicon (Si), Sulfur (S), Phosphorus (P) yog tam sim no tab sis tsis nruj tswj.
Contrast nrog PSL2:PSL2 cov kav dej muaj qhov txwv siab tshaj plaws ntawm Carbon, Sulfur, Phosphorus, thiab tseem yuav tsum tau ntxiv cov micro-alloying ntsiab xws li Niobium (Nb), Vanadium (V), los yog Titanium (Ti) kom zoo zog thiab toughness.
3. Cov txheej txheem tsim khoom
L290 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. Tsis muaj longitudinal weld seam.
Welded (ERW - Electric Resistance Welded):Ua los ntawm dov steel phaj / skelp rau hauv lub tog raj kheej thiab vuam cov seam. Qhov no yog qhov ntau tshaj thiab tus nqi - hom zoo rau L290 PSL1.
4. Dimensional Standards
Lub cev qhov ntev (sab nraud txoj kab uas hla, phab ntsa thickness) yog tswj los ntawm cov qauv zoo liAPI 5LthiabTS EN ISO 3183. Common specifications muaj xws li:
Sab nraud txoj kab uas hla (OD):Ntau yam ntawm me me (piv txwv li, 2-3/8 ") mus rau loj heev (piv txwv li, 42" thiab siab dua).
Phab ntsa Thickness (WT):Tsim los ntawm lub sijhawm (piv txwv li, Teem sijhawm 40, 80) lossis los ntawm tus lej lej lossis millimeter tus nqi. Kev sib xyaw ua ke ntawm OD, WT, thiab YS txiav txim siab cov yeeb nkab siab.
Sib piv: PSL1 vs. PSL2
Qhov no yog qhov sib txawv tseem ceeb hauv pipeline engineering. L290 muaj nyob rau hauv ob qho tib si PSL1 thiab PSL2, tab sis lawv tsis hloov pauv.
| Feature | PSL1 (Standard Qib) | PSL2 (High-Test Qib) |
|---|---|---|
| Tshuaj Tswj | Looser, tsom rau kev sib ntsib cov khoom siv kho tshuab. | Kev nruj, nrog kev txwv siab tshaj plaws ntawm C, S, P. Yuav tsum muaj micro-alloying. |
| Toughness | Charpy Impact Test tsis tas yuav tsum tau. | Charpy Impact Testing yog TSEEM CEEB.Qhov no ua kom cov yeeb nkab tuaj yeem tiv taus tawg hauv qhov txias txias. |
| Y/T ratio | Tsis tau teev tseg. | Qhov siab tshaj plaws ntawm 0.93 rau qhov ntau thiab tsawg dua los yog sib npaug rau 14 "thiab 0.90 rau qhov ntau thiab tsawg> 14". |
| Lub zog muaj zog | Txheeb xyuas los ntawm kev sim transverse. | Kev tshuaj xyuas los ntawm kev soj ntsuam ntev ntev dua. |
| Hydrostatic Test | Yuav tsum tau. | Yuav tsum tau, feem ntau ntawm kev ntsuas siab dua. |
| Nqi & Daim Ntawv Thov | Tus nqi qis dua.Siv rau cov ntawv thov tseem ceeb tsawg, tsis yog-kev pabcuam qaub, qis- kab siab, lossis qhov kub tsis tshua muaj kev txhawj xeeb. | Tus nqi siab dua.Siv rau qhov tseem ceeb, siab -siab, offshore, lossis arctic daim ntawv thov thiab hauv kev pabcuam qaub (H₂S ib puag ncig). |
Cov ntawv thov siv
L290 PSL1 yog qib workhorse siv nyob rau hauv ntau yam kev siv uas siab toughness tsis yog ib qho kev txhawj xeeb tseem ceeb:
Onshore Gathering Lines:Sau cov roj thiab roj los ntawm lub qhov dej.
Dej Txhaj Kab:Rau cov roj theem nrab rov qab.
Tsawg- Cov kav xa hluav taws xob siab:Kev thauj cov roj, roj, lossis cov khoom ua kom zoo dua hauv av.
Industrial Piping:Rau kev siv cov nroj tsuag, kev siv vaj tse, thiab piling.
Slurry thiab Effluent Lines.
Kev tswj hwm tus qauv
Thawj tus qauv thoob ntiaj teb rau cov yeeb nkab no yogAPI 5L / ISO 3183 Cov Ntawv Pov Thawj(American Petroleum Institute / International Organization for Standardization). Cov specification feem ntau yog sau liAPI 5L Qib B(lub npe qub) los yogAPI 5L Gr IB, uas ua haujlwm sib npaug li L290 PSL1.
Cov ntsiab lus
L290 PSL1 Carbon Steel Kab Yeebyog cov yeeb nkab uas muaj zog, kev lag luam, thiab dav siv dav siv rau ntau yam dav dav - lub hom phiaj kev siv cov kav dej. Nws qhov kev txwv tseem ceeb yog qhov tsis muaj kev lav phib xaub toughness (tsis muaj Charpy qhov yuav tsum tau muaj), uas ua rau nws tsis tsim nyog rau qhov tseem ceeb, siab -siab, qis- kub, los yog qaub qhov chaw ua haujlwm qhov chaw nruj dua.PSL2qib yuav raug teev tseg.
