API 5L PSL1 Qib B yog cov khoom siv dav dav thiab dav siv rau kev tsim Longitudinal Submerged Arc Welded (LSAW) kav[npe: 1, citation: 2, citation: 3, citation: 6, citation: 9]. Qhov kev sib xyaw ua ke no yog cov khoom lag luam uas muab los ntawm ntau lub tuam txhab thoob ntiaj teb rau kev thauj mus los hauv cov kav dej thiab kev siv engineering dav dav [citation: 1, citation: 2, citation: 5].
Nws yog ib qho tseem ceeb kom nkag siab tias "API 5L PSL1 Qib B" yog hais txog ob qho tib siqib khoom sivthiab covcov khoom specification qibntawm cov hlau. Cov khoom tiav LSAW yeeb nkab yog tsim los ua kom tau raws li cov kev xav tau no thiab muaj dav los ntawm cov neeg muag khoom uas teev cov qib API 5L hauv lawv cov ntau lawm [citation: 1, citation: 2, citation: 5, citation: 8].
Ntawm no yog cov ncauj lus kom ntxaws ntxaws rau API 5L PSL1 Qib B LSAW yeeb nkab:
Cov ntsiab lus tseem ceeb
| Yam ntxwv | Kev piav qhia |
|---|---|
| Txuj | API 5L: Specification rau Kab Yeeb (tam sim no ib tsab ua raws li ISO 3183) [citation:7, citation:8]. |
| Khoom Specification Level | PSL1: Cov txheej txheem zoo rau cov kab yeeb nkab, nrog cov kev cai nruj dua piv rau PSL2 (xws li, tsis muaj qhov yuav tsum tau kuaj xyuas, kev txwv tsis pub siv tshuaj tsis nruj, thiab lub zog siab tshaj plaws tsis tau teev tseg) [citation: 2, citation: 7]. |
| Qib Steel | Qib B (L245): Cov qib carbon steel ntau tshaj plaws nyob rau hauv API 5L specification, sawv cev rau lub hauv paus rau kev pabcuam kav dej dav dav [citation: 7, citation: 8]. |
| Hom kev tsim khoom | Seamless, ERW,LSAW, SSAW/HSAW [citation:1, citation:9]. |
| Txheej txheem | LSAW (Longitudinal Submerged Arc Vuam): Cov kav dej yog tsim los ntawm kev tsim cov hlau phaj rau hauv lub tog raj kheej (siv JCOE, UOE, los yog cov txheej txheem zoo sib xws) thiab welding lub longitudinal seam ob sab hauv thiab sab nraud siv cov txheej txheem submerged arc. Cov txheej txheem no yog qhov zoo- haum rau kev tsim cov kav loj - txoj kab uas hla nrog cov phab ntsa tuab [citation: 1, citation: 5, citation: 8]. |
| Chemical Composition (max %) [citation: 2, citation: 4, citation: 7, citation: 8] | |
| Cov pa roj carbon (C): 0.26-0.28 | |
| Manganese (Mn): 1.20 | |
| Phosphorus (P): 0.030 | |
| Sulfur (S): 0.030 | |
| Mechanical Properties (min) [citation: 1, citation: 2, citation: 4, citation: 7, citation: 8, citation: 9] | |
| Yield zog:241-245 MPa (35,000 psi) | |
| Tensile zog:414-415 MPa (60,000 psi) | |
| Elongation:Feem ntau 27% (nws txawv ntawm phab ntsa thickness) | |
| Hom Loj Ntau Yam [citation: 2, citation: 3, citation: 6, citation: 8, citation: 10] | |
| Sab nraud txoj kab uas hla:323.9mm txog 2134mm (kwv yees . 12" rau 84") | |
| Phab ntsa Thickness:5 hli txog 75 hli (txog 120 hli muaj los ntawm qee lub tuam txhab) [citation: 8, citation: 10] | |
| Ntev:3 m txog 18.3 m (customizable, mus txog 32 m muaj rau cov kev siv tshwj xeeb) [citation: 6, citation: 8] | |
| Cov kauj ruam tsim khoom | 1. steel phaj xaiv thiab ntug milling. 2. Ntug crimping thiab tsim siv cov txheej txheem JCOE lossis UOE. 3. Sab hauv thiab sab nraud submerged arc vuam (ntau-wire SAW). 4. Mechanical expanding (rau UOE/JCOE). 5. Tsis yog- kuaj kev puas tsuaj (Ultrasonic, X-ray). 6. Kev ntsuas hydrostatic. 7. Xaus ntsej muag thiab beveling. |
| Common Applications [citation: 5, citation: 7, citation: 8] | Kev thauj mus los ntawm cov kav dej dav dav ntawm cov roj, roj, thiab dej ntawm qhov siab nruab nrab; sib sau ua ke thiab ntws kab hauv cov dej ntws; kev xa dej mains; kev siv cov qauv; engineering thiab offshore tej yaam num uas qhov kev txhim kho cov khoom ntawm PSL2 tsis tas yuav tsum tau. |
| Daim ntawv pov thawj | Mill Test Certificate feem ntau muab raws li API 5L cov cai. |
🔍 Cov ntsiab lus tseem ceeb kom nkag siab
"Qib B" txhais li cas: Hauv API 5L, Qib B (tseem hu uaL245nyob rau hauv ISO cim) muaj qhov tsawg kawg nkaus yield zog ntawm241-245 MPa (35,000 psi)thiab qhov tsawg kawg nkaus tensile lub zog ntawm414-415 MPa (60,000 psi)[npe: 1, citation: 2, citation: 4, citation: 7, citation: 8, citation: 9]. Nws yog cov qib hauv qab tshaj plaws, haum rau ntau yam kev siv cov raj xa dej uas siab dua - qib zog (X42, X52, thiab lwm yam) tsis tas yuav tsum muaj.
PSL1 vs PSL2: Kev xaiv ntawm PSL1 thiab PSL2 yog qhov tseem ceeb. PSL1 yog tus qauv zoo nrog cov kev cai yooj yim. Qhov sib txawv tseem ceeb rau PSL1 [citation: 2, citation: 4, citation: 7]:
Chemistry: Txheem txwv (raws li qhia saum toj no).
Lub zog: Tsuas yog qhov tsawg kawg nkaus tawm los thiab lub zog tensile tau teev tseg.
Kev ntsuam xyuas cuam tshuam: Tsis xav tau.
Tsis yog -Kev Ntsuas Kev Puas Tsuaj (NDT): Cov qauv yuav tsum muaj.
Kev siv yam: Haum rau cov kev pabcuam dav dav dav dav, cov kab sib sau ua ke, thiab cov tshuab xa tawm.
PSL2: Yuav tsum muaj kev tswj xyuas cov tshuaj lom neeg nruj dua (qis C, P, S), qhia txog qhov siab tshaj plaws nrog rau qhov tsawg kawg nkaus lub zog txwv, mandates Charpy V-notch impact testing (feem ntau 27 J ntawm 0 degree), thiab muaj cov kev cai NDT nruj dua [citation: 2, citation: 4, citation: 7, citation: 8]. PSL2 feem ntau xav tau rau cov kev pabcuam tseem ceeb, kev pabcuam qaub, qis- daim ntawv thov kub, thiab cov kav dej tswj hwm lub cev xws li FERC lossis DOT.
LSAW Manufacturing rau Qib B: Thaum Qib B feem ntau tsim los ua cov yeeb nkab seamless rau cov kab me me, cov txheej txheem LSAW tau zoo - haum rau kev tsimloj - txoj kab uas hla, tuab - phab ntsaCov kav dej hauv Qib B rau kev siv xws li kev xa dej, cov khoom siv hauv tsev, thiab qis dua - cov kab hluav taws xob hydrocarbon [citation: 1, citation: 2, citation: 3, citation: 5, citation: 8, citation: 10]. Cov txheej txheem welding ob chav -sided welding ua kom ntseeg tau siab - seams zoo txawm tias tus qauv no - cov khoom siv zog.
Qib Nomenclature: Hauv API 5L, qib tuaj yeem raug xa mus rau ob qho tib siQib B(siv lub npe qub txeeg qub teg) los yogL245(siv lub npe ISO 3183-raws li niaj hnub no) [citation: 3, citation: 7].
Chemical Composition Variation: Cov peev txheej sib txawv qhia qhov txawv me ntsis ntawm cov ntsiab lus carbon rau PSL1 Qib B, xws li 0.26% mus rau 0.28% max, tag nrho nyob rau hauv qhov kev txwv rau qhov kev qhia [citation: 2, citation: 4, citation: 7, citation: 8].
📊 PSL1 Qib B Property Summary
| Khoom | Tus nqi |
|---|---|
| Txuj | API 5L PSL1 |
| Qib | B (L245) |
| Yield zog (min) | 241-245 MPa (35,000 psi) |
| Tensile zog (min) | 414-415 MPa (60,000 psi) |
| Cov pa roj carbon (max) | 0.26-0.28% |
| Kev ntsuam xyuas cuam tshuam | Tsis xav tau |
| Max Phab Ntsa Thickness (LSAW) | Txog li 75-120 mm |
Cov ntsiab lus
Hauv kev xaus,API 5L PSL1 Qib B LSAW yeeb nkabyog ib qho zoo- tsim, qauv khoom uas sib txuas cov khoom txhim khu kev qha ntawm Qib B steel nrog cov txheej txheem tsim khoom LSAW muaj zog [citation: 1, citation: 2, citation: 5]. Nws yog cov qib hauv qab tshaj plaws rau qhov loj - txoj kab uas hla ntawm cov kav dej thiab cov qauv siv uas lub zog siab dua thiab kev ntsuas nruj dua ntawm PSL2 (xws li, rau X42, X52, thiab lwm yam) tsis tsim nyog [citation: 1, citation: 4, citation: 7]. Cov txheej txheem LSAW tso cai rau kev tsim cov kav dej nrog cov kab loj (txog 84 "+), cov phab ntsa tuab (txog 75-120 mm), thiab zoo heev weld kev ncaj ncees, ua rau nws tsim nyog rau ntau yam kev tsim kho vaj tse xws li roj, roj, thiab dej xa xov kab [citation: 2, citation: 3, citation: 5, citation: 8, citation: 10].API 5L PSL1 Qib B LSAW yeeb nkabnrog rau qhov yuav tsum tau muaj (OD, phab ntsa thickness, ntev) thiab cov kev xav tau ntxiv.
