Xaiv cov qib carbon steel uas tsim nyog yog ib kauj ruam tseem ceeb hauv kev tsim thiab tsim cov kav dej ntuj. Ob qhov Longitudinal Submerged Arc Welded kav thiab High -Frequency Welded kav yog siv dav hauv cov tshuab xa hluav taws xob, tab sis lawv qhov kev ua tau zoo yog nyob ntawm cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, thiab cov qauv ua raws li cov qib steel xaiv. Cov qib sib txawv yog tsim los ua kom tau raws li qhov sib txawv ntawm qhov siab, ib puag ncig, thiab cov kev xav tau kev pabcuam, ua rau kev xaiv qib yog qhov tseem ceeb hauv kev ua kom muaj kev nyab xeeb thiab ua haujlwm zoo.
Common Carbon Steel Qib rau Gas Pipelines
API 5L Qib thiab lawv daim ntawv thov
API 5L yog tus qauv siv dav tshaj plaws rau cov kav dej hauv cov roj thiab cov pa xa mus. Nws txhais tau ntau yam ntawm cov qib steel, los ntawm qis dua - cov ntaub ntawv muaj zog xws li Qib B mus rau siab - qib zog xws li X70 thiab siab dua. Cov qib no tsim nyog rau ob qho tib si LSAW thiab HFW kav dej, nyob ntawm seb cov kav dej tsim thiab kev ua haujlwm.
Cov qib qis xws li API 5L Qib B thiab X42 feem ntau yog siv rau hauv cov ntawv thov siab qis mus rau nruab nrab, suav nrog kev faib hluav taws xob hauv nroog thiab luv luv - cov kav dej nyob deb. Raws li qib nce, lub zog tawm los yog li ntawd, tso cai rau cov qib siab dua xws li X60, X65, thiab X70 siv nyob rau hauv ntev - nrug thiab siab - cov tshuab xa hluav taws xob. Cov qib siab dua no kuj muaj kev txhim kho toughness, uas yog qhov tseem ceeb rau kev tiv thaiv kev tawg tawm thiab ua kom muaj kev nyab xeeb ntawm kev ua haujlwm nyob rau hauv cov khoom hnyav.
ASTM thiab EN cov qhab nia sib npaug
Ntxiv rau API cov qauv, lwm cov qauv thoob ntiaj teb xws li ASTM thiab EN kuj txhais cov ntaub ntawv tsim nyog rau cov kav dej. ASTM A53 thiab ASTM A106 feem ntau yog siv rau kev dav dav - lub hom phiaj piping thiab tuaj yeem siv rau hauv qee lub tshuab roj nrog cov kev xav tau nruab nrab. EN cov qauv xws li EN 10219 thiab EN 10217 muab cov lus qhia tshwj xeeb rau cov qauv thiab cov kav dej siv hauv cov khw European.
Txawm hais tias cov qauv no yuav txawv ntawm kev faib thiab npe, lawv feem ntau muab cov qib sib npaug ntawm cov tshuab ua haujlwm. Kev xaiv ntawm lawv feem ntau yog nyob ntawm qhov project qhov chaw, kev cai tswj hwm, thiab cov neeg siv khoom tshwj xeeb.
| Txuj | Qib | Yield Strength Range (MPa) | Daim ntawv thov |
|---|---|---|---|
| API 5L | Qib B | Ntau dua lossis sib npaug li 245 | Tsawg- cov kav dej siab |
| API 5L | X52 | Ntau dua lossis sib npaug rau 360 | Nruab nrab -siab kis |
| API 5L | X65 | Ntau dua lossis sib npaug li 450 | Ntev -kab kav dej |
| ASTM | A53 Gr.B | Ntau dua lossis sib npaug li 240 | General gas thiab kua thauj |
| EN | S355 | Ntau dua lossis sib npaug rau 355 | Kev siv cov qauv thiab cov kav dej |
Cov Khoom Siv Khoom Siv rau LSAW thiab HFW Pipes
Chemical Composition thiab Weldability
Rau ob qho tib si LSAW thiab HFW kav dej, cov tshuaj muaj pes tsawg leeg ntawm cov hlau yuav tsum xyuas kom meej weldability zoo thiab ua haujlwm zoo ib yam. Cov ntsiab lus carbon tau ua tib zoo tswj kom tsis txhob muaj qhov tawv tawv ntau dhau hauv tshav kub- thaj tsam cuam tshuam, uas tuaj yeem ua rau tawg. Tsis tshua muaj leej faj thiab phosphorus qib kuj tseem ceeb los txhim kho ductility thiab txo txoj kev pheej hmoo ntawm nkig tawg.
Cov ntsiab lus microalloying xws li niobium, vanadium, thiab titanium feem ntau tau ntxiv los txhim kho cov nplej kom zoo dua qub thiab txhim kho lub zog yam tsis muaj kev cuam tshuam weldability. Cov ntsiab lus no ua lub luag haujlwm tseem ceeb hauv kev ua tiav cov khoom siv kho tshuab uas xav tau rau qib siab - qib pipeline steels.
Lub zog thiab Toughness Balance
Hauv kev siv roj pipeline, lub zog ib leeg tsis txaus. Cov khoom siv kuj tseem tuaj yeem ua kom muaj zog txaus, tshwj xeeb tshaj yog nyob rau qhov kub thiab txias, txhawm rau tiv thaiv kev ua tsis tiav. Qhov no tseem ceeb tshwj xeeb tshaj yog nyob rau hauv cheeb tsam uas muaj huab cua txias los yog qhov kub thiab txias hloov pauv.
High-qib steels xws li API 5L X65 thiab X70 yog tsim los muab qhov zoo sib npaug ntawm lub zog thiab tawv. Qhov no tso cai rau cov kav dej ua haujlwm kom nyab xeeb nyob rau hauv qhov siab siab thaum tswj kev tiv thaiv kev tawg pib thiab nthuav tawm.
Qhov sib txawv ntawm Qib Xaiv rau LSAW thiab HFW Pipes
Haum rau LSAW Pipes
LSAW cov kav dej feem ntau yog siv rau hauv loj - txoj kab uas hla thiab siab - cov ntawv siv siab, uas xav tau cov phab ntsa tuab thiab cov ntaub ntawv muaj zog dua. Yog li ntawd, siab dua -qib steels xws li X60, X65, thiab X70 feem ntau xaiv rau LSAW kav. Cov qib no muab cov khoom tsim nyog rau kev ua haujlwm kom tiv taus siab sab hauv thiab sab nraud loads.
Cov txheej txheem submerged arc vuam siv hauv LSAW ntau lawm tso cai rau kev nkag mus tob thiab muaj zog weld seams, ua rau nws haum rau cov ntaub ntawv tuab thiab siab dua - qib zog.
Haum rauHFW Pipes
HFW kav dej feem ntau yog tsim los ntawm steel coils thiab feem ntau yog siv nyob rau hauv nruab nrab - txoj kab uas hla pipelines thiab hauv nroog tis systems. Cov qib xws li API 5L Qib B, X42, thiab X52 feem ntau siv hauv HFW yeeb nkab ntau lawm vim lawv qhov zoo formability thiab weldability.
Txawm li cas los xij, nrog kev nce qib hauv siab - zaus vuam thev naus laus zis, qib siab dua xws li X60 thiab txawm tias X65 tuaj yeem siv rau hauv HFW kav dej raws li kev tswj hwm kev tsim khoom. Qhov no nthuav lawv daim ntawv thov ntau yam rau hauv cov kav dej uas xav tau ntau dua.
| Hom yeeb nkab | Cov Qib Siab | Txoj kab uas hla | Daim ntawv thov Scenario |
|---|---|---|---|
| LSAW | X60, X65, X70 | Loj txoj kab uas hla | Ntev - kis tau tus mob |
| HFW | Gr.B, X42, X52 | Nruab nrab txoj kab uas hla | Kev faib tawm hauv nroog thiab cheeb tsam |
| HFW | X60, X65 | Nruab nrab mus rau loj | Txhim kho cov kab ke sib kis |
Kev xaiv qhov kev txiav txim siab rau Gas Pipeline Projects
Sib piv qib rau kev ua haujlwm
Xaiv cov qib steel uas tsim nyog yuav tsum muaj kev ntsuam xyuas dav dav ntawm kev ua haujlwm, suav nrog kev kub siab, kub, thiab ib puag ncig yam. Kev siab dua thiab kev sib kis ntev dua feem ntau xav tau ntau dua - cov ntaub ntawv qib kom muaj kev nyab xeeb thiab ua haujlwm tau zoo.
Tsis tas li ntawd, ib puag ncig tej yam kev mob xws li av muaj pes tsawg leeg, muaj peev xwm corrosion, thiab kev nyab xeeb yuav tsum tau xav txog. Nyob rau hauv ib puag ncig corrosive, kev tiv thaiv ntxiv xws li txheej txheej lossis cathodic tiv thaiv tej zaum yuav xav tau tsis hais qib steel.
Ua raws li Cov Qauv thiab Kev Tswj Xyuas Zoo
Xyuas kom ua raws li cov qauv thoob ntiaj teb yog qhov tseem ceeb rau kev nyab xeeb thiab kev ua haujlwm ntawm cov kav dej. Cov neeg tsim khoom yuav tsum siv cov txheej txheem tswj xyuas kom zoo, suav nrog kev tshuaj xyuas tshuaj lom neeg muaj pes tsawg leeg, kev sim tshuab, thiab tsis yog - tshuaj xyuas kev puas tsuaj.
Traceability thiab ntawv pov thawj kuj tseem ceeb heev, vim lawv muab kev ntseeg siab tias cov ntaub ntawv ua tau raws li qhov yuav tsum tau ua thiab tuaj yeem siv tau rau hauv cov phiaj xwm tseem ceeb.
Xaus
Kev xaiv qib carbon steel yog qhov tseem ceeb hauv kev txiav txim siab kev ua haujlwm thiab kev nyab xeeb ntawm LSAW thiab HFW roj kav. Los ntawm API 5L Qib B mus rau qib siab - qib zog xws li X70, txhua yam khoom muaj qhov tshwj xeeb zoo nyob ntawm daim ntawv thov. Los ntawm kev nkag siab txog kev sib raug zoo ntawm cov khoom siv, cov txheej txheem tsim khoom, thiab kev ua haujlwm, cov kws ua haujlwm tuaj yeem xaiv cov qib tsim nyog tshaj plaws rau lawv cov kav dej. Rau cov tuam txhab xws li Huayang Steel Pipe, kev tswj xyuas nruj raws li cov qauv thoob ntiaj teb thiab xa cov khoom zoo ib yam yog qhov tseem ceeb rau kev txhawb nqa kev lag luam txhim khu kev qha ntawm lub ntiaj teb natural gas infrastructure.
