Longitudinal Submerged Arc Welded carbon steel yeeb nkab, feem ntau hu ua LSAW yeeb nkab, ua lub luag haujlwm tseem ceeb hauv cov tshuab hluav taws xob siab niaj hnub no. Nyob rau hauv lub dav ntawm cov pa roj carbon steel yeeb nkab, LSAW cov khoom yog tshwj xeeb engineered rau txoj kab uas hla loj, tuab phab ntsa, thiab structurally demanding daim ntaub ntawv. Tsis zoo li seamless yeeb nkab los yog me me txoj kab uas hla HFW yeeb nkab, LSAW yeeb nkab yog tsim los ntawm steel phaj tsim thiab welded raws ib tug longitudinal seam, uas tso cai rau meej tswj ntawm phab ntsa thickness thiab txhua yam khoom. Nyob rau hauv siab - roj, roj, dej, thiab slurry pipelines, txoj kev tsim khoom no muaj kev ntseeg tau ntawm cov qauv thiab qhov yooj yim.
Hauv kev sib kis engineering, cov yeeb nkab kev ua tau zoo yog txhais tsis yog los ntawm cov khoom siv qib tab sis kuj los ntawm kev ncaj ncees, qhov ntev ntev, kev tiv thaiv tawg, thiab ntev - lub sij hawm ruaj khov nyob rau hauv cyclic loading. LSAW carbon steel yeeb nkab hais txog cov kev cai no los ntawm kev tswj cov phaj xaiv, kev tsim cov txheej txheem siab heev xws li UOE lossis JCOE, thiab ntau- hla cov txheej txheem arc welding uas ua kom muaj kev nkag mus tob thiab qis qis.
Manufacturing Route thiab cov yam ntxwv ntawm tus yam ntxwv
Phaj xaiv thiab txoj kev tsim
Kev tsim cov LSAW carbon steel yeeb nkab pib nrog siab - zoo carbon steel phaj, feem ntau tsim los ntawm thermomechanical tswj kev ua. Lub phaj yog ntug-milled, ua ntej- khoov, thiab tsim rau hauv cov duab cylindrical siv UOE lossis JCOE thev naus laus zis. Cov txheej txheem tsim no txo qis cov kev ntxhov siab uas seem thiab txhim kho qhov sib npaug, uas yog qhov tseem ceeb rau kev ua haujlwm siab - qhov kev pabcuam kev ntxhov siab yog qhov tseem ceeb.
Tom qab tsim, sab hauv thiab sab nraud submerged arc vuam yog ua raws cov seam longitudinal. Submerged arc vuam yog qhov zoo dua vim tias nws muaj cov khoom siv hluav taws xob ruaj khov, sib sib zog nqus sib sib zog nqus, thiab cov nyiaj tso tawm siab. Lub weld seam yog tom qab ntawd raug kuaj xyuas ultrasonic thiab kuaj hluav taws xob kom paub tseeb tias muaj suab nrov.
Cov lus hauv qab no qhia txog cov peev txheej tseem ceeb feem ntau cuam tshuam nrog LSAW carbon steel yeeb nkab.
| Parameter | Hom kab mob |
|---|---|
| Sab nraud txoj kab uas hla | 406-1422 hli |
| Phab ntsa Thickness | 6mm-40 hli |
| Ntev | 6 m – 12 m |
| Manufacturing Standard | API 5L, EN 10219, EN 10208 |
| Qib Steel | X42 – X80 |
Lub peev xwm los tsim tuab- cov yeeb nkab phab ntsa hauv cov kab loj loj muabLSAW carbon steel yeeb nkabqhov zoo sib xws hauv cov kav dej hauv lub cev thiab hla - cov kab sib kis hauv lub tebchaws.
Mechanical Performance in High -Kev Pabcuam Siab
Lub zog, Toughness, thiab Fracture Control
Hauv kev siv siab - siab, carbon steel yeeb nkab yuav tsum tiv thaiv lub siab sab hauv, sab nraud loads, kub hloov pauv, thiab muaj peev xwm txav hauv av. LSAW yeeb nkab feem ntau yog tsim nyob rau hauv API 5L qib xws li X52, X60, X65, thiab X70. Cov qib no yog txhais los ntawm qhov tsawg kawg nkaus qhov yuav tsum tau muaj zog, uas ncaj qha cuam tshuam rau kev ua haujlwm siab nyob rau hauv cov kav dej tsim cov lej.
Mechanical zog yog tswj los ntawm phaj chemistry thiab dov txheej txheem. Cov ntsiab lus carbon tsawg ua ke nrog micro- alloying cov ntsiab lus xws li niobium thiab vanadium txhim kho lub zog thaum tswj kev weldability. Kev cuam tshuam qhov hnyav, tshwj xeeb tshaj yog nyob rau qhov kub thiab txias, yog qhov tseem ceeb rau kev tiv thaiv kev tawg tawg hauv qhov ntev - cov kav dej.
Cov lus hauv qab no nthuav tawm cov neeg sawv cev cov khoom siv rau cov qib API feem ntau siv hauv LSAW carbon steel yeeb nkab.
| Qib | Yam tsawg kawg yield zog MPa | Yam tsawg kawg Tensile Strength MPa | Lub zog cuam tshuam ntawm -20℃J |
|---|---|---|---|
| X52 | 360 | 460 | Ntau dua lossis sib npaug li 40 |
| X60 | 415 | 520 | Ntau tshaj los yog sib npaug rau 50 |
| X65 | 450 | 535 | Ntau tshaj los yog sib npaug rau 60 |
| X70 | 485 | 570 | Ntau dua lossis sib npaug li 70 |
Cov khoom no ua rau LSAW carbon steel yeeb nkab ua haujlwm kom nyab xeeb nyob rau hauv siab sab hauv thaum muab kev tiv thaiv kev tawg thiab kev nthuav tawm.
Welding Integrity thiab Tsis yog -Kev kuaj kev puas tsuaj
Lub ntsiab lus tseem ceeb ntawm LSAW yeeb nkab yog qhov ntev weld seam. Hauv siab - kev pabcuam siab, weld zoo yuav tsum sib npaug lossis tshaj qhov kev ua haujlwm hlau. Submerged arc welding tsim cov qauv vuam zoo nrog kev nkag mus zoo thiab qhov porosity tsawg kawg nkaus thaum tsis muaj kev tswj tau zoo. Thaum tshav kub kub input yog ua tib zoo sib npaug kom tsis txhob muaj ntau dhau ntawm grain loj hlob nyob rau hauv lub tshav kub- cuam tshuam cheeb tsam.
Tom qab vuam, txhua lub yeeb nkab feem ntau raug kuaj ultrasonic ntawm qhov ntev vuam, ntsuas hydrostatic siab, thiab ntsuas qhov ntev. Hydrostatic kuaj xyuas cov qauv kev ncaj ncees nyob rau hauv simulated sab hauv siab tej yam kev mob, feem ntau ntawm 1.25 mus rau 1.5 lub sij hawm lub siab tsim. Cov kauj ruam no yog qhov tseem ceeb rau kev lees paub cov yeeb nkab kom haum rau kev tsim cov kav dej.
Ntxiv nrog rau kev soj ntsuam vuam seam, lub cev ultrasonic kuaj tuaj yeem kuaj xyuas cov lamination lossis cov phaj sab hauv, kom ntseeg tau tias tag nrho cov qauv kev ntseeg tau.
Daim ntawv thov hauv Roj, Roj, thiab Kev xa dej
LSAW carbon steel yeeb nkab yog dav siv nyob rau hauv onshore thiab offshore roj thiab roj kis tau tus mob kab, dej hauv nroog, thiab loj -scale infrastructure tej yaam num. Hauv cross- lub teb chaws cov kav dej, txoj kab uas hla loj LSAW yeeb nkab txo cov naj npawb ntawm girth welds xav tau thaum lub sij hawm tsim kho, uas txhim kho kev tsim kho kom zoo thiab txo qis qhov tshwm sim ntawm kev teeb tsa tsis raug.
Rau cov roj thiab roj kis tau tus mob, carbon steel yeeb nkab yuav tsum tau sib xws nrog cov txheej txheem sab hauv thiab sab nraud. Sab nraud peb- txheej polyethylene txheej los yog fusion bonded epoxy txheej tiv thaiv cov av corrosion, thaum cov txheej sab hauv tuaj yeem txo cov dej tsis kam thiab txhim kho hydraulic efficiency.
Hauv kev xa dej, LSAW carbon steel yeeb nkab muab siab load-cov kabmob muaj peev xwm rau faus kev teeb tsa hauv qab txoj kev loj lossis kev tsheb ciav hlau. Cov phab ntsa tuab tsim ua kom muaj kev ruaj ntseg txawm tias nyob hauv thaj chaw uas muaj tsheb thauj mus los hnyav lossis cov av tsis ruaj khov.
Economic thiab Engineering Considerations
Los ntawm kev xav engineering, kev xaiv ntawm LSAW carbon steel yeeb nkab feem ntau yog qhov sib npaug ntawm cov qauv kev ua tau zoo thiab cov nqi ua haujlwm. Piv nrog seamless yeeb nkab nyob rau hauv loj diameters, LSAW yeeb nkab muaj qhov zoo ntawm kev lag luam vim phaj-raws li kev tsim khoom thiab scalable ntau lawm. Nyob rau tib lub sij hawm, nws muab superior dimension tswj piv rau kauv welded yeeb nkab thaum nruj roundness thiab alignment tolerances yuav tsum tau.
Pipeline tsim cov lej xws li ASME B31.4 thiab B31.8 vam khom lub zog, phab ntsa tuab, thiab cov qauv tsim los txiav txim siab ua haujlwm siab. LSAW carbon steel yeeb nkab, nrog rau nws cov qib siab yield thiab tswj cov phab ntsa tuab, tso cai rau cov neeg tsim khoom los txhim kho cov khoom siv thaum tswj kev nyab xeeb.
Xaus
LSAW carbon steel yeeb nkab sawv cev rau ib feem tseem ceeb ntawm cov pa roj carbon steel yeeb nkab kev lag luam, tshwj xeeb tshaj yog nyob rau hauv siab -siab transmission systems. Nws cov phaj-raws li txoj kev tsim khoom ua kom muaj txoj kab uas hla loj, tuab phab ntsa yeeb nkab nrog kev tswj cov khoom siv thiab kev ua haujlwm zoo heev. Los ntawm kev tsim cov txheej txheem siab, ntau- dhau qhov kev sib txuas arc welding, thiab kev sim tsis zoo -kev puas tsuaj, LSAW yeeb nkab ua tiav lub zog, toughness, thiab dimensional precision xav tau rau kev thov cov raj xa dej.
Hauv kev tsim kho vaj tse niaj hnub no, qhov ntev - kev thauj mus los ntawm lub zog thiab qhov loj - kev faib dej yog qhov tseem ceeb, LSAW carbon steel yeeb nkab txuas ntxiv muab cov kev daws teeb meem txhim khu kev qha thiab kev lag luam. Nws cov yam ntxwv ntawm kev ua tau zoo, ua ke nrog kev sib raug zoo nrog cov txheej txheem txheej txheej txheej txheem thiab cov txheej txheem thoob ntiaj teb nruj, ua rau nws yog cov khoom siv hauv ntiaj teb cov raj xa dej engineering.
