Submerged Arc Welded (SAW) steel kav yog ib qho tseem ceeb ntawm cov yeeb nkab khoom siv dav hauv cov roj, cov pa roj, dej thiab dej, hluav taws xob, hluav taws xob engineering, thiab lwm yam. Vim lawv qhov zoo ntawm lub siab muaj zog-cov kabmob muaj peev xwm, ruaj khov weld zoo, thiab tsim nyog rau cov haujlwm loj - txoj kab uas hla, lawv tuav txoj haujlwm tseem ceeb hauv qhov ntev -ntaus pipeline engineering. Ib qho tseem ceeb hauv kev txiav txim siab qhov kev ua tau zoo ntawm SAW steel kav yog cov khoom siv hlau siv.
Tsab ntawv xov xwm no yuav txheeb xyuas cov khoom siv sib xws, cov yam ntxwv ntawm kev ua haujlwm, cov xwm txheej ntawm daim ntawv thov, thiab cov ntsiab lus xaiv ntawm SAW steel kav, pab cov neeg nyeem kom nkag siab txog "cov ntaub ntawv logic" tom qab SAW steel kav.
I. Cov Khoom Siv ntawm SAW Steel Pipes yog dab tsi?
SAW steel kav feem ntau yog tsim los ntawm steel phaj lossis steel coils ua raw khoom los ntawm kev sib sau, vuam, nthuav dav, tshuaj xyuas, thiab lwm yam txheej txheem. Lawv cov khoom tseem ceeb yog hais txog qib steel thiab tshuaj lom neeg muaj pes tsawg leeg tau txais los ntawm steel phaj nws tus kheej.
Feem ntau SAW steel kav muaj xws li longitudinal submerged arc welded steel kav thiab kauv submerged arc welded steel kav. Txawm hais tias lawv txawv ntawm txoj kev tsim, lawv cov ntaub ntawv xaiv cov logic yog qhov zoo ib yam. Lub hom phiaj tseem ceeb yog kom ua tiav qhov sib npaug ntawm lub zog, toughness, weldability, thiab corrosion kuj.
Qhov zoo ntawm cov khoom siv steel yeeb nkab ncaj qha txiav txim siab txog kev nyab xeeb, kev pabcuam lub neej, thiab kev ua haujlwm ruaj khov ntawm tag nrho cov kav dej.
II. Common Steel Qib rau SAW Steel Pipes
Hauv kev siv engineering, cov ntaub ntawv ntawm SAW steel kav feem ntau raug xaiv raws li cov qauv thoob ntiaj teb lossis cov qauv hauv tebchaws. Cov qauv zoo xws li API 5L, GB / T 9711, ASTM, EN, thiab lwm yam.
Common Carbon Steel thiab Tsawg-Cov Khoom Siv Hlau
Hauv cov roj thiab roj kis tau tus mob, feem ntau siv yog API 5L series pipeline steels, suav nrog:
- API 5L Gr.B
- API 5L X42, X52, X60, X65, X70
- API 5L PSL1 thiab PSL2 qib
Cov qib steel no muaj nyob rau hauv qis -carbon micro- alloy steel system. Los ntawm kev ntxiv me me ntawm cov ntsiab lus alloying xws li manganese, niobium, vanadium, thiab titanium, lawv txhim kho lub zog thiab tawv ntawm cov hlau thaum ua kom zoo weldability.
Nyob rau hauv domestic engineering tej yaam num, cov ntaub ntawv hauv qab no kuj muaj xws li:
- Q235B, Q345B
- L245, L290, L360, L415, L450
Cov kav dej hauv tsev steel qib sib xws rau X52, X60, X65, X70
III. Core Performance Requirements rau SAW Steel Pipe Materials
SAW steel kav feem ntau yog siv nyob rau hauv siab - siab, loj - txoj kab uas hla, thiab ntev - kis tau tus mob tej yaam num, yuav tsum tau nruj heev steel kev ua tau zoo:
1. Lub zog ua haujlwm
Cov kav dej yuav tsum tiv taus cov dej hauv lub siab thiab cov av sab nraud, yog li cov hlau yuav tsum muaj lub zog siab thiab tensile zog. Nrog rau kev txhim kho cov qib pipeline, siab -lub zog pipeline steels xws li X60, X65, thiab X70 tau maj mam dhau los ua qhov kev xaiv loj.
2. Toughness Performance
Cov kav xa hluav taws xob feem ntau tau muab tso rau hauv qhov chaw geological complex. Kev ua haujlwm xws li qhov kub thiab txias, permafrost, thaj chaw roob, thiab thaj chaw seismic muab cov kev xav tau siab dua ntawm cov kav hlau steel. Siab- cov ntaub ntawv zoo SAW steel yeeb nkab feem ntau yuav tsum tau dhau qis- qhov ntsuas kub ntawm qhov ntsuas kub kom ntseeg tau tias muaj kev sib tsoo zoo hauv qhov chaw huab cua.
3. Weldability
SAW steel kav lawv tus kheej yog tsim los ntawm vuam, yog li lub hauv paus hlau yuav tsum muaj weldability zoo kom tsis txhob vuam tsis xws luag xws li cov kab nrib pleb thiab kub tawg. Tsawg carbon sib npaug tsim yog ib qho tseem ceeb ntawm cov yeeb nkab steel.
4. Corrosion Resistance
Txawm hais tias cov yeeb nkab steel nws tus kheej tsis muaj kev tiv thaiv corrosion, siab - cov hlau zoo tuaj yeem hloov kho kom zoo dua los tiv thaiv -corrosion systems xws li 3PE thiab FBE, tswj kev ruaj ntseg hauv lub sijhawm ntev - kev pabcuam.
IV. Xaiv Logic ntawm cov ntaub ntawv rau txawv daim ntawv thov scenarios
Cov haujlwm engineering sib txawv muaj qhov sib txawv hauv qhov yuav tsum tau ua rau SAW steel yeeb nkab cov ntaub ntawv. Kev xaiv cov khoom siv yuav tsum ua raws li cov kev ua haujlwm tiag tiag.
Roj thiab Gas Transmission Pipelines
Tej yaam num zoo li no feem ntau muaj kev kub siab thiab kev sib kis ntev, nrog rau kev ruaj ntseg siab heev. Feem ntau, API 5L X52 thiab qib siab dua cov hlau raug xaiv, thiab qee qhov siab - cov kab siab siab txawm siv X70 qib kav hlau.
Nroog Gas Pipe Networks
Cov kav xa hluav taws xob hauv nroog kuj muaj cov kev cai nruj rau kev nyab xeeb thiab kev ruaj ntseg, tab sis lawv cov qib siab kuj qis dua cov kav dej ntev -. L360, X52, thiab lwm yam ntaub ntawv feem ntau raug xaiv, ua ke nrog cov txheej txheem tiv thaiv kev tiv thaiv -corrosion.
Kev Siv Dej, Dej Dej, thiab Dej Txuas Hluav Taws Xob Engineering
Cov dej num zoo li no tau them nyiaj ntau dua rau kev tiv thaiv corrosion thiab kev pab cuam lub neej, thiab feem ntau txais yuav Q235B, Q345B, lossis L245 cov ntaub ntawv, ua ke nrog cov khoom siv sab hauv thiab sab nraud los tiv thaiv -corrosion coatings.
Txuas hniav, Pile Foundations, thiab Structure Engineering
Hauv cov qauv steel thiab hauv paus engineering, SAW steel kav feem ntau yog siv los ua cov khoom thauj -cov kabmob, xav tau lub zog siab thiab weldability. Feem ntau, cov txheej txheem steel xws li Q345B thiab Q355B raug xaiv.
V. Kev cuam tshuam ntawm cov ntaub ntawv ntawm kev pab cuam lub neej ntawm SAW Steel Pipes
Kev tsim lub neej ntawm cov kav xa dej hauv av feem ntau yog ntau tshaj 30 xyoo, thiab siab - cov ntaub ntawv zoo yog qhov tseem ceeb rau kev ua tiav ntev - lub sijhawm ua haujlwm ruaj khov.
High-cov kav xa dej zoo, ua ke nrog cov txheej txheem vuam paub tab thiab tiv thaiv- cov kab ke corrosion, tuaj yeem tiv taus qhov siab sab hauv, ib puag ncig corrosion, thiab av kev ntxhov siab, txo qhov kev pheej hmoo ntawm cov kav dej xau thiab tsis ua haujlwm. Los ntawm tag nrho - lub neej voj voog txoj kev xav, xaiv cov hlau tsim nyog tsis yog ib qho teeb meem nkaus xwb tab sis kuj yog ib qho kev xav txog kev lag luam engineering.
Xaus
Raws li ib feem tseem ceeb ntawm kev siv hluav taws xob niaj hnub thiab kev tsim kho vaj tse, kev xaiv cov khoom siv ntawm SAW steel kav yog ib txoj haujlwm ua haujlwm uas muaj ntau qhov ntev xws li cov khoom siv kho tshuab, vuam txheej txheem, kev pabcuam ib puag ncig, thiab kev tsim qauv engineering. High-cov hlau zoo tsis yog lub hauv paus ntawm siab- cov kav hlau zoo nkaus xwb tab sis kuj tseem yog lub hauv paus lav rau lub sijhawm ntev -kev nyab xeeb ntawm cov kav dej.
Hauv kev siv engineering, tsuas yog los ntawm kev sib txuas cov khoom tsim nyog nrog cov txheej txheem tsim khoom thiab kev soj ntsuam nruj zoo tuaj yeem muaj txiaj ntsig zoo ntawm SAW steel kav hauv cov dej loj -scale tej yaam num yuav tsum tau siv tiag tiag, muab kev txhawb zog rau kev xa mus thiab kev tsim kho hauv nroog.
