Loj Diameter Longitudinal Submerged Arc Welded yeeb nkab, feem ntau hu ua LSAW carbon steel yeeb nkab, occupies ib qho tseem ceeb txoj hauj lwm nyob rau hauv niaj hnub zog kis infrastructure. Tsis zoo li cov khoom me me -inch welded welded cov khoom, LSAW kav yog tsim los rau siab -load, siab- siab, thiab ntev- daim ntawv thov nyob deb qhov kev ntseeg tau ntawm cov qauv thiab qhov ntev ntawm qhov kev ruaj ntseg tsis yog - sib tham. Los ntawm cov khoom siv roj av rau cov khoom siv sab nrauv, cov logic engineering tom qab LSAW carbon steel yeeb nkab nyob rau hauv nws cov txheej txheem tswj kev tsim, weld kev ncaj ncees, thiab hloov tau mus rau qib siab - qib carbon steel cov ntaub ntawv.
Manufacturing Fundamentals ntawmLSAW Carbon Steel Yeeb Nkab
Phaj xaiv thiab Carbon Steel yam ntxwv
LSAW yeeb nkab ntau lawm pib nrog siab- zoo carbon steel phaj, feem ntau tsim los ntawm kev tswj dov los yog thermomechanical tswj kev ua. Cov pa roj carbon steel siv rau cov ntawv thov LSAW tsis yog txhais los ntawm cov ntsiab lus carbon, tab sis los ntawm kev sib npaug ntawm cov pa roj carbon, manganese, thiab microalloying cov ntsiab lus uas muab lub zog, toughness, thiab weldability.
Lub phaj thickness feem ntau yog li ntawm 6 hli mus rau ntau tshaj 40 hli, ua rau cov khoom loj - txoj kab uas hla nrog cov phab ntsa tuab heev. Muab piv rau coil- raws li cov txheej txheem, phaj pub pub ntau dua kev tswj xyuas cov tshuaj muaj pes tsawg leeg thiab cov khoom siv sib xws thoob plaws qhov dav.
Hauv qab no yog cov lus siv rau cov qib carbon steel siv hauv LSAW yeeb nkab tsim.
| Txuj | Qib | Yield zog MPa | Tensile zog MPa | Daim ntawv thov |
|---|---|---|---|---|
| API 5L | X42 | Ntau dua lossis sib npaug li 290 | 415–655 | Dej, qis - roj siab |
| API 5L | X52 | Ntau dua lossis sib npaug rau 360 | 460–760 | Roj thiab roj pipelines |
| API 5L | X60 | Ntau dua lossis sib npaug li 415 | 520–760 | High -siab kis |
| API 5L | X70 | Ntau dua lossis sib npaug rau 485 | 570–760 | Ntev - kab hauv kab |
| ASTM A252, ASTM A252 | Gr.3 | Ntau dua lossis sib npaug rau 310 | Ntau dua lossis sib npaug rau 455 | Cov txheej txheem piling |
Cov qib no qhia tau hais tias carbon steel kev ua tau zoo li cas tuaj yeem tsim kho kom tau raws li qhov xav tau ntawm kev sib kis.
Tsim thiab Submerged Arc Vuam txheej txheem
Cov txheej txheem LSAW feem ntau siv UOE lossis JCOE txoj hauv kev. Nyob rau hauv ob qho tib si, cov hlau phaj yog maj mam nias rau hauv ib lub cylindrical zoo ua ntej longitudinal vuam yog ua los ntawm submerged arc vuam. Cov txheej txheem submerged arc siv granular flux los tiv thaiv lub pas dej ua ke, kom ntseeg tau tias muaj kev nkag mus tob thiab ruaj khov txhua yam khoom.
Qhov tseem ceeb engineering kom zoo dua ntawm LSAW yog nyob rau hauv weld seam tswj. Vim hais tias cov seam yog ncaj thiab longitudinal, kev ntxhov siab faib nyob rau hauv lub siab sab hauv tseem kwv yees. Lub vuam tuaj yeem raug tua los ntawm ob qho tib si sab hauv thiab sab nraud, ua tiav kev nkag mus rau tag nrho thiab txo qis qhov tshwm sim tsis zoo.
Tom qab vuam, cov kav dej tau nthuav dav, kuaj ultrasonic, kuaj hluav taws xob, kuaj hydrostatic, thiab ntsuas qhov ntev kom ua raws li API lossis ASTM cov qauv.
Structure Performance thiab Mechanical Behavior
Lub zog, Toughness thiab siab Resistance
Cov pa roj carbon steel LSAW cov kav dej tau siv dav hauv siab -siab kis tau tus mob vim tias lawv cov qauv muaj peev xwm ntsuas tau zoo nrog cov phab ntsa tuab. Hoop stress resistance yog ncaj qha proportional rau thickness thiab yield zog, tso cai rau engineers tsim cov kav dej uas tiv thaiv sab hauv siab tshaj 10 MPa nyob rau hauv ntev - roj thiab roj systems.
Cov pa roj carbon steel lub cev muaj zog ua kom ntseeg tau tias txawm tias nyob rau qib siab zog xws li X70, kev cuam tshuam txaus tuaj yeem tswj tau, tshwj xeeb tshaj yog nyob rau hauv qis - qhov kev pabcuam kub. Charpy V-kev ntsuas qhov ntsuas feem ntau yog ua los xyuas kom meej qhov ua tau zoo ntawm kev puas tsuaj.
Dimensional Stability thiab Loj Diameter Advantage
Ib qho ntawm cov yam ntxwv ntawm LSAW carbon steel yeeb nkab yog nws lub peev xwm ua kom tiav cov kab uas hla loj heev thaum tuav nruj qhov ntev ntev. Txoj kab uas hla feem ntau yog los ntawm 406 hli mus rau 1422 hli, nrog rau qee qhov kev cai ntau tshaj qhov no rau cov ntug dej hiav txwv lossis cov haujlwm ua haujlwm.
Cov lus hauv qab no qhia txog qhov sib txawv ntawm qhov sib txawv thiab cov khoom siv hluav taws xob rau LSAW carbon steel kav.
| Parameter | Hom kab mob |
|---|---|
| Sab nraud | 406–1422 mm |
| Phab ntsa Thickness | 6-40 mm los yog siab dua |
| Ntev | 6-12 m txheem |
| Weld Hom | Longitudinal SAW |
| Txoj Kev Xeem | UT, RT, Hydrostatic |
Qhov muaj peev xwm zoo li no ua rau LSAW tshwj xeeb yog tsim rau cov kav dej hauv lub cev, hla -lub teb chaws kis kab mob, thiab cov hauv paus hauv kev tawm ntug dej hiav txwv.
Corrosion Control thiab Surface Engineering
Carbon steel, thaum mechanically muaj zog, yuav tsum muaj kev tiv thaiv corrosion nyob rau hauv feem ntau kis tau tus mob ib puag ncig. LSAW cov kav dej feem ntau yog muab nrog cov khoom siv tiv thaiv sab nraud xws li 3LPE, 3LPP, lossis fusion bonded epoxy. Cov txheej sab hauv kuj tseem siv tau los txo cov kev sib txhuam hauv cov dej thauj.
Rau cov kav dej faus, cov txheej txheem tiv thaiv cathodic feem ntau ua ke nrog cov txheej txheem sab nraud kom ntev kev pab cuam lub neej dhau 20 txog 30 xyoo. Nyob rau hauv ib puag ncig marine, cov nyiaj pub dawb ntxiv yog qee zaum muab tso rau hauv kev tsim los them nyiaj rau ntev -cov nqi corrosion.
Kev hloov pauv ntawm cov pa roj carbon steel rau txheej txheej txheej txheem txhim kho nws txoj kev ua neej nyob thiab txo tag nrho cov nqi txij nkawm.
Engineering Applications Beyond Transmission
Thaum cov roj thiab cov kav dej tseem siv tau zoo tshaj plaws, LSAW carbon steel kav kuj tseem ua haujlwm hauv cov qauv thiab dej engineering sectors. Nyob rau hauv daim ntaub ntawv piling, txoj kab uas hla loj thiab siab phab ntsa thickness muab zoo heev axial thiab lateral load peev xwm. Hauv kev xa dej, cov pa roj carbon steel qhov kev ncaj ncees tso cai rau nws ua haujlwm nyob rau hauv ob qho tib si siab thiab av load.
Tsis tas li ntawd, LSAW carbon steel kav tau siv ntau dua hauv cov haujlwm txuas ntxiv hluav taws xob xws li cua turbine monopiles, qhov kev ntseeg tau ntawm cov qauv thiab loj - txoj kab uas hla yog qhov tseem ceeb.
Xaus
LSAW carbon steel yeeb nkab sawv cev rau kev sib koom ua ke ntawm cov khoom siv science thiab vuam engineering. Los ntawm kev siv siab - zoo carbon steel phaj thiab tswj submerged arc vuam cov tswv yim, cov tuam ntxhab tuaj yeem xa cov kav loj - txoj kab uas hla muaj peev xwm tiv taus huab cua siab thiab cov khoom thauj.
Nws qhov kev ua tau zoo ntawm kev ua haujlwm vuam, qhov ntev, thiab kev sib raug zoo nrog kev tiv thaiv siab tshaj -corrosion systems ua rau LSAW carbon steel yeeb nkab yog cov khoom siv hauv ntiaj teb kev tsim kho vaj tse. Raws li kev xav tau ntawm lub zog thiab kev tsim vaj tsev tsis yooj yim txuas ntxiv mus, qhov kev nkag siab tob thiab kev ntseeg tau ntawm LSAW carbon steel yeeb nkab kom ntseeg tau tias nws txuas ntxiv qhov tseem ceeb hauv kev siv engineering niaj hnub.
