Longitudinal Submerged Arc Welded kav, feem ntau hu ua LSAW kav, yog siv dav hauv kev xa hluav taws xob, kev tsim vaj tsev, thiab loj - cov phiaj xwm loj. Thaum cov yeeb nkab txoj kab uas hla thiab phab ntsa tuab feem ntau tau txais kev saib xyuas thaum lub sijhawm yuav khoom, cov khoom siv qib ntawm LSAW carbon steel yeeb nkab yog qhov sib npaug ntawm kev txiav txim siab nws qhov kev ua tau zoo, kev nyab xeeb, thiab kev pabcuam lub neej. Cov qib khoom sib txawv yog tsim los hais txog cov kev xav tau ntawm txhua yam, ib puag ncig, thiab kev tswj hwm, ua rau kev xaiv cov khoom siv rau kev txiav txim siab engineering es tsis yog kev xaiv lag luam yooj yim.
Kab lus no tshawb txog LSAW carbon steel kav los ntawm kev xaav ntawm cov khoom siv qib, piav qhia txog cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, thiab kev siv ib puag ncig cuam tshuam rau kev xaiv qib hauv tiag -cov haujlwm hauv ntiaj teb.
Lub luag haujlwm ntawm cov khoom qib hauv LSAW Yeeb Nkab Kev Ua Haujlwm
Tshaj Geometry thiab Vuam Txoj Kev
LSAW cov kav dej yog tsim los ntawm kev tsim cov hlau phaj rau hauv cov duab cylindrical thiab vuam lawv longitudinally siv submerged arc vuam. Thaum cov txheej txheem no ua kom zoo zoo weld zoo thiab tswj qhov ntev, qhov kev ua tau zoo ntawm cov yeeb nkab kawg yog nyob ntawm cov phaj steel siv. Cov ntaub ntawv qib txhais tsis yog tsuas yog qib zog xwb, tab sis kuj toughness, ductility, weldability, thiab tsis kam rau kev pab cuam - cuam tshuam txog kev pheej hmoo xws li tawg lossis qaug zog.
Hauv cov pa roj carbon steel LSAW kav, cov khoom siv feem ntau tau teev tseg raws li cov qauv thoob ntiaj teb xws li API 5L, EN 10208, EN 10219, lossis ASTM cov qauv. Txhua qib qhia txog qhov sib npaug ntawm lub zog thiab lub zog kom haum rau cov haujlwm tshwj xeeb.
Common Carbon Steel Qib Siv nyob rau hauvLSAW Pipes
API 5L Qib rau Kev Sib Txuas Hluav Taws Xob
Nyob rau hauv cov roj thiab roj kis tau tus mob, API 5L qib xws li X52, X60, X65, thiab X70 yog dav siv rau LSAW kav. Cov lej qib siab qhia tau hais tias muaj zog tsawg dua qhov ua tau zoo, tso cai rau cov phab ntsa nyias nyias ntawm tib lub zog ua haujlwm. Txawm li cas los xij, kev ua kom muaj zog kuj yuav tsum muaj kev tswj xyuas nruj dua thiab cov khoom siv vuam zoo kom muaj kev nyab xeeb.
Cov qib qis xws li X52 feem ntau raug xaiv rau nruab nrab - cov kav dej siab lossis thaj chaw uas muaj kev tsim kho nyuaj uas qhov kev xav tau siab dua. Cov qib siab dua xws li X65 lossis X70 muaj ntau dua nyob rau hauv ntev - cov kav dej xa mus rau qhov deb uas qhov ua tau zoo thiab qhov hnyav yog qhov tseem ceeb.
EN Standard Qib rau Cov Qauv thiab Kev Siv Siab
Hauv European- cov haujlwm ua qauv, qib xws li L360, L415, lossis qib qauv zoo li S355 feem ntau tau teev tseg rau LSAW carbon steel kav. Cov qib no hais txog kev sib npaug ntawm cov khoom siv dag zog thiab kev cuam tshuam zoo sib xws, ua rau lawv haum rau ob qho tib si siab - muaj cov kav dej thiab thauj khoom - cov kev siv cov txheej txheem.
Table 1: Hom LSAW Carbon Steel Qib thiab cov yam ntxwv ntawm cov tshuab
| Txuj | Qib | Yield zog Range MPa | Daim ntawv thov |
|---|---|---|---|
| API 5L | X52 | Ntau dua lossis sib npaug rau 360 | Nruab nrab - cov kav dej siab |
| API 5L | X65 | Ntau dua lossis sib npaug rau 448 | Ntev - kis tau tus mob |
| API 5L | X70 | Ntau dua lossis sib npaug rau 483 | Siab - cov kab hauv siab |
| TS EN 10208 | L360 | Ntau dua lossis sib npaug rau 360 | Onshore pipelines |
| TS EN 10219 | S355 | Ntau dua lossis sib npaug rau 355 | Cov yeeb nkab steel hlau |
Cov qhab nia no tsis tuaj yeem hloov pauv yam tsis muaj kev tshuaj xyuas engineering, vim tias txhua tus qauv txiav txim siab qhov kev xeem, cov qauv kev lees paub, thiab cov kev xav tau sib txawv.
Chemical Composition thiab nws cov kev cuam tshuam engineering
Lub zog, Toughness, thiab Weldability Balance
Cov tshuaj muaj pes tsawg leeg ntawm carbon steel siv rau LSAW kav yog ua tib zoo tswj kom ua tau raws li qhov xav tau cov khoom siv kho tshuab. Cov ntsiab lus carbon ncaj qha cuam tshuam lub zog tab sis kuj cuam tshuam rau weldability thiab toughness. Cov pa roj carbon ntau dhau tuaj yeem ua rau muaj kev nyuaj siab hauv tshav kub- thaj chaw cuam tshuam, ua rau muaj kev pheej hmoo ntawm kev tawg thaum vuam.
Cov ntaub ntawv LSAW niaj hnub no cia siab rau micro- alloying cov ntsiab lus xws li manganese, niobium, vanadium, lossis titanium los txhim kho lub zog yam tsis muaj kev cuam tshuam ductility. Txoj hauv kev no tso cai rau qib siab dua -qib steels kom muaj peev xwm weldability thiab qis- kub toughness, uas yog qhov tseem ceeb rau cov kav dej ua haujlwm hauv huab cua txias lossis hauv qab lub voj voog.
Cov khoom siv qib xaiv raws li kev pabcuam
Siab, Kub, thiab ib puag ncig
Kev xaiv cov khoom siv qib rau LSAW carbon steel kav yuav tsum ua raws li qhov kev pab cuam ib puag ncig. Kev kub siab sab hauv yuav tsum muaj cov txiaj ntsig txaus thiab lub zog tensile, thaum qis -kev ua haujlwm kub xav tau kev cuam tshuam zoo rau kev tiv thaiv kev puas tsuaj. Hauv kev pabcuam qaub lossis corrosive ib puag ncig, kev xav tau ntxiv ntawm cov tshuaj muaj pes tsawg leeg thiab kev huv yuav siv tau.
Hauv kev siv cov qauv, qhov twg LSAW cov kav dej siv los ua cov khoom thauj -cov tswv cuab, cov qib khoom raug xaiv raws li kev sib txuas ntawm cov khoom sib txuas, kev qaug zog, thiab kev sib raug zoo nrog cov txheej txheem fabrication xws li txiav, vuam, thiab txheej.
Table 2: Kev txiav txim siab qib khoom siv rau kev siv LSAW sib txawv
| Kev Pabcuam | Cov Khoom Siv Tseem Ceeb | Hom Qib Range |
|---|---|---|
| Siab - cov kav dej siab | High yield zog thiab toughness | API 5L X65-X70 |
| Tsawg-kev pabcuam kub | Enhanced cuam tshuam toughness | X52–X65 nrog CVN tswj |
| Cov kab ke tsim qauv | Balanced zog thiab ductility | S355 |
| Ntev - ncua qauv | Kev qaug zog | EN structural qib |
| Onshore zog thauj | Weldability thiab sib xws | L360 / X52 |
Qhov kev sib raug zoo ntawm cov khoom siv qib thiab cov kev pabcuam yog qhov tseem ceeb rau kev nyab xeeb thiab kev ua kom zoo dua tus nqi.
Kev xeem thiab kev lees paub txuas rau cov khoom qib
Mechanical thiab Impact Test
Txhua qib khoom siv tau teev tseg rau LSAW carbon steel kav nqa nws tus kheej cov cai ntsuas. Kev ntsuas tensile txheeb xyuas cov txiaj ntsig thiab lub zog tensile, thaum Charpy V- ntsuas qhov ntsuas qhov ntsuas ntsuas qhov hnyav ntawm qhov ntsuas kub. Cov qib siab dua feem ntau suav nrog cov kev xeem nruj dua thiab cov qauv kev lees paub los xyuas kom meej qhov ua tau zoo ntawm cov yeeb nkab ntev.
Hauv ntau qhov haujlwm, kev sim ntxiv xws li kev ntsuas qhov poob qis yuav xav tau rau qib siab - qib pipeline steels los ntsuas kev puas tsuaj ntawm kev tawg. Cov kev cai no raug khi ncaj qha rau cov khoom siv qib thiab tsis tuaj yeem raug cais tawm ntawm cov txheej txheem xaiv qib.
Kev yuav khoom thiab kev txiav txim rau tus tswv
Khoom Qib raws li Kev Tswj Xyuas Kev Nyab Xeeb
Los ntawm tus tswv lossis EPC txoj kev xav, xaiv cov khoom siv raug rau cov kav dej LSAW yog ib hom kev tswj hwm kev pheej hmoo. Tshaj -qib qhia txog qib yuav ua rau cov khoom siv thiab cov nqi tsim khoom ntau yam tsis muaj txiaj ntsig zoo, thaum nyob rau hauv -qib qhia txog qib yuav qhia txog kev pheej hmoo ntawm kev ncaj ncees mus sij hawm ntev.
Cov tuam txhab muaj kev paub dhau los xws li Huayang Steel Pipe txhawb cov neeg siv khoom los ntawm kev xaiv cov khoom siv qib nrog cov qauv tsim, cov qauv siv tau, thiab kev cia siab rau lub neej. Qhov no ua kom ntseeg tau tias cov LSAW carbon steel yeeb nkab tau xaiv tsis tsuas yog ua raws li kev xa khoom, tab sis kuj muaj kev ntseeg siab thoob plaws hauv nws lub neej kev pab.
Xaus: Cov Qib Cov Khoom Siv txhais tau tias tus nqi ntawmLSAW Carbon Steel Pipes
LSAW carbon steel kav tsis yog txhais los ntawm lawv qhov loj lossis cov txheej txheem tsim khoom. Lawv qhov kev ua tau zoo tiag tiag yog hauv paus hauv cov khoom siv qib, uas tswj hwm lub zog, tawv, weldability, thiab ntev - tus cwj pwm coj raws li kev pabcuam. Kev nkag siab txog qhov sib txawv ntawm cov qib khoom tso cai rau engineers, EPC cov neeg cog lus, thiab cov tswv los txiav txim siab paub qhov sib npaug ntawm kev nyab xeeb, kev tsim kho, thiab tus nqi.
Rau kev tsim kho vaj tse, lub zog, thiab kev tsim qauv thoob ntiaj teb, xaiv cov khoom tsim nyog qib hloov LSAW carbon steel kav los ntawm cov khoom lag luam rau hauv kev daws teeb meem engineering.
