Hluav taws xob Resistance Welded kav yog dav siv nyob rau hauv cov roj thiab roj kis tau tus mob, structural engineering, dej tsheb thauj mus los, thiab lub nroog infrastructure tej yaam num. Ib qho ntawm cov yam ntxwv ntawm ERW kev tsim cov yeeb nkab yog tias cov kav dej yog tsim los ntawm kub -rolled steel coils es tsis yog cov phaj tuab lossis cov ntawv hlau. Qhov zoo, qhov tseeb qhov tseeb, thiab cov yam ntxwv ntawm cov khoom siv hlau ntawm cov kub -rolled coil ncaj qha cuam tshuam rau kev ruaj ntseg, vuam kev ncaj ncees, thiab kev ua haujlwm kawg ntawm cov yeeb nkab. Vim li no, kev xaiv kub- dov steel kauj yog suav tias yog ib qho tseem ceeb tshaj plaws hauv ERW carbon steel yeeb nkab ntau lawm.
Kub- dov steel coils yog tsim los ntawm cov txheej txheem dov tsis tu ncua nyob rau hauv uas cov hlau slabs tau rhuab mus rau qhov kub thiab txias thiab dhau los ntawm dov mills los ua cov hlau ntev. Cov strips no ces coiled rau kev thauj mus los thiab ua ntxiv. Nyob rau hauv ERW yeeb nkab mills, cov coils yog uncoiled thiab pub rau hauv ib txoj kab uas cov sawb maj mam zoo li tus cylindrical yeeb nkab ua ntej cov npoo yog welded siv high - zaus kuj welding. Vim tias tag nrho cov txheej txheem tsim nyob rau ntawm tus cwj pwm ntawm cov khoom siv sawb, cov yam ntxwv ntawm lub cev kub -rolled coil yuav tsum ua raws li cov kev cai nruj heev.
Dimensional Yam ntxwv ntawm Kub-Rolled Steel Coils
Coil Width thiab Pipe Diameter Relationship
Ib qho tseem ceeb tshaj plaws ntawm kub- dov steel coil siv hauv ERW yeeb nkab ntau lawm yog qhov dav strip. Qhov dav ntawm steel sawb txiav txim siab qhov ncig ntawm cov yeeb nkab tom qab tsim, uas thaum kawg txhais cov yeeb nkab sab nraud txoj kab uas hla. Thaum lub sij hawm npaj ntau lawm, manufacturers xam qhov yuav tsum tau coil dav raws li lub hom phiaj yeeb nkab txoj kab uas hla thiab vuam nyiaj pub.
Yog hais tias lub sawb dav tsis raug tswj kom raug, cov yeeb nkab uas tshwm sim tuaj yeem pom qhov sib txawv ntawm qhov sib txawv los yog vuam tsis xws luag. Ib txoj hlua uas nqaim dhau tuaj yeem tsim qhov sib txawv thaum lub sijhawm tsim, thaum lub sawb dav dav tuaj yeem tsim kev sib tshooj lossis tsis sib xws. Yog li ntawd, steel mills feem ntau muab coils nrog nruj dav tolerances los xyuas kom meej compatibility nrog ERW tsim cov cuab yeej.
Thickness Range thiab Phab Ntsa Thickness Control
Lub thickness ntawm kub - dov steel kauj ncaj qha txiav txim siab phab ntsa thickness ntawm cov yeeb nkab tiav. Hauv ERW yeeb nkab tsim, cov coil thicknesses feem ntau yog los ntawm ob peb millimeters mus rau ntau tshaj nees nkaum millimeters nyob ntawm seb cov yeeb nkab loj thiab daim ntawv thov. Kev tswj cov tuab tuab yog qhov tseem ceeb rau kev tswj xyuas cov yeeb nkab kom zoo ib yam thiab ua kom tau raws li cov qauv tsim qauv.
Thicker coils feem ntau yog siv rau cov kav dej uas yuav tsum tiv taus siab dua los yog cov khoom siv thauj khoom, xws li cov roj thiab cov kav xa hluav taws xob lossis cov kav dej. Thinner coils feem ntau yog siv rau cov kav dej, cov kav dej scaffolding, thiab cov khoom siv lub teeb. Uniform thickness thoob plaws tag nrho cov kauj ua kom ruaj khov tsim cov xwm txheej thiab txo qhov kev pheej hmoo ntawm vuam inconsistencies.
Cov lus hauv qab no qhia txog qhov sib txawv ntawm qhov kub ntawm -rolled coils siv hauv ERW yeeb nkab ntau lawm.
| Parameter | Hom kab mob | Kev piav qhia |
|---|---|---|
| Coil Dav | 600-2000 hli | Txiav cov yeeb nkab ncig thiab txoj kab uas hla |
| Coil Thickness | 1.5-25 hli | Txiav cov yeeb nkab phab ntsa thickness |
| Coil Nyhav | 15-35 tons | Influences ntau lawm efficiency |
| Dav Tolerance | ± 1-2 hli | Ua kom muaj qhov tseeb |
Cov kev ntsuas qhov ntev no tso cai rau ERW cov yeeb nkab mills los tsim cov yeeb nkab ntau qhov ntau thiab tsawg haum rau cov ntawv thov sib txawv.
Kev cuam tshuam ntawm Coil Quality on Pipe Forming
Formability thiab yas deformation
Txoj kev tsim theem ntawm ERW yeeb nkab raug tsim yuav maj mam khoov lub tiaj tus steel sawb mus rau hauv ib lub voj voog los ntawm ib ntu ntawm kev sib sau cov menyuam. Cov txheej txheem no yuav tsum tau cov khoom siv hlau kom tau txais cov yas deformation tseem ceeb thaum tswj kev ua haujlwm zoo. Kub- dov coils siv rau ERW kav dej yuav tsum yog li ntawd muaj cov qauv zoo heev.
Formability feem ntau nyob ntawm microstructure thiab tshuaj muaj pes tsawg leeg ntawm cov hlau. Tsawg- carbon steels thiab microalloyed steels feem ntau yog siv vim lawv muab ductility zoo thiab muaj peev xwm zam tau rov khoov dua thaum lub sij hawm tsim. Yog hais tias cov hlau tsis muaj ductility tsis txaus, cov kab nrib pleb tuaj yeem txhim kho raws cov npoo thaum lub sij hawm shaping, uas tuaj yeem nthuav tawm mus rau hauv lub vuam seam.
Uniform mechanical zog raws qhov ntev ntawm lub kauj kuj ua rau muaj kev ruaj khov tsim. Variations ntawm lub zog los yog hardness nyob rau hauv lub sawb yuav ua rau uneven deformation, ua rau ovality los yog dimensional distortion nyob rau hauv cov yeeb nkab tiav.
Surface Quality thiab Edge Condition
Nto zoo yog lwm qhov tseem ceeb ntawm kub- dov coil kev ua tau zoo hauv ERW yeeb nkab ntau lawm. Vim hais tias cov npoo ntawm cov hlau sawb yog rhuab thiab nias ua ke thaum lub sij hawm siab - vuam zaus, kev huv thiab geometry ntawm cov npoo npoo muaj zog cuam tshuam rau qhov zoo ntawm vuam.
Cov coils nrog cov nplai ntau dhau, qhov tsis xws luag, lossis ntug waviness tuaj yeem ua rau cov vuam tsis ruaj khov. Txhawm rau tiv thaiv cov teeb meem zoo li no, ntau lub tuam txhab ERW yeeb nkab ua cov ntug trimming ua ntej tsim. Cov txheej txheem no tshem tawm cov npoo tsis sib xws thiab ua kom zoo ib yam ntawm cov sawb thaum vuam.
Smooth thiab tsis xws luag-dawb qhov chaw kuj txhim kho txoj kev ruaj ntseg los ntawm kev txo cov kev sib txhuam ntawm cov sawb thiab cov txheej txheem. Yog li ntawd, siab - kub zoo- dov coils pab ncaj qha rau ob qho tib si kev tsim khoom thiab cov yeeb nkab kawg.
Kev sib raug zoo ntawm Coil Properties thiab Pipe Performance
Mechanical Properties of Coil Materials
Kub- dov steel coils siv hauv ERW yeeb nkab tsim feem ntau yog tsim raws li cov khoom siv thoob ntiaj teb xws li ASTM, API, lossis EN specifications. Cov qauv no txhais cov khoom siv kho tshuab nrog rau lub zog tawm los, lub zog tensile, thiab elongation kom ntseeg tau tias cov kav dej tiav tuaj yeem tiv taus kev ua haujlwm nyuaj.
Cov khoom siv hluav taws xob ntawm lub kauj yuav tsum tau ua tib zoo sib xyaw ua ke rau kev npaj siv cov yeeb nkab. Piv txwv li, pipeline steels siv rau cov roj thiab roj tsheb thauj mus los yuav tsum muaj zog ntau dua piv nrog cov kav dej dav dav. Nyob rau tib lub sijhawm, cov khoom siv yuav tsum tswj kom muaj zog txaus los tiv thaiv kev puas tsuaj nyob rau hauv qis - kub lossis dynamic loading tej yam kev mob.
Cov lus hauv qab no qhia txog cov khoom siv kho tshuab zoo rau cov qib steel uas siv hauv ERW yeeb nkab coils.
| Qib Steel | Yield zog (MPa) | Tensile zog (MPa) | Elongation (%) | Daim ntawv thov |
|---|---|---|---|---|
| ASTM A53 Gr.B | Ntau dua lossis sib npaug li 240 | Ntau dua lossis sib npaug rau 415 | Ntau dua lossis sib npaug li 21 | General pipeline systems |
| API 5L Gr.B | Ntau dua lossis sib npaug li 245 | Ntau dua lossis sib npaug rau 415 | Ntau dua lossis sib npaug 22 | Roj thiab roj kis tau tus mob |
| API 5L X52 | Ntau dua lossis sib npaug rau 360 | Ntau dua lossis sib npaug rau 460 | Ntau tshaj los yog sib npaug rau 20 | Siab - cov kav dej siab |
| EN S355J2H | Ntau dua lossis sib npaug rau 355 | 470–630 | Ntau tshaj los yog sib npaug rau 20 | Structure engineering |
Cov yam ntxwv ntawm cov khoom siv no ua kom ntseeg tau tias ERW cov kav dej uas tsim los ntawm kub -rolled coils tuaj yeem ua tiav kev ua tau zoo raws li ntau yam kev pabcuam.
Kev cuam tshuam rau Vuam Stability
Cov khoom ntawm cov hlau kauj kuj cuam tshuam rau tus cwj pwm ntawm cov khoom thaum lub sij hawm siab - zaus kuj vuam. Thaum lub sij hawm tus txheej txheem no, hluav taws xob tam sim no heats lub strip npoo sai heev ua ntej lawv yuav nias ua ke los tsim cov weld seam. Hlau nrog cov muaj pes tsawg leeg zoo ib yam thiab microstructure teb ntau dua qhov kev kwv yees rau lub voj voog cua sov no, ua rau cov pob qij txha muaj zog dua.
Yog tias cov khoom siv raw muaj cov impurities ntau dhau los yog cov khoom tsis sib xws, cov cua sov- cuam tshuam ib puag ncig ntawm cov vuam yuav tsim cov microstructures uas tsis xav tau. Qhov no tuaj yeem txo qhov toughness lossis qaug zog ua haujlwm ntawm cov yeeb nkab. Yog li ntawd, niaj hnub ERW yeeb nkab ntau lawm cia siab rau siab - kub zoo- dov coils nrog ua tib zoo tswj cov khoom siv hlau.
Xaus
Kub- dov steel coils ua cov khoom siv tseem ceeb rau ERW carbon steel yeeb nkab tsim, thiab lawv cov yam ntxwv ntawm qhov ntev, cov khoom siv kho tshuab, thiab qhov zoo ntawm qhov chaw cuam tshuam ncaj qha rau kev ua haujlwm ntawm cov khoom kawg. Cov tsis xws li coil dav thiab thickness txiav txim siab cov yeeb nkab txoj kab uas hla thiab phab ntsa thickness, thaum cov khoom formability thiab weldability cuam tshuam rau stability ntawm lub forming thiab vuam txheej txheem.
Los ntawm kev siv siab -zoo kub- dov coils nrog qhov tseeb qhov ntev thiab cov khoom siv hlau zoo ib yam, ERW yeeb nkab tuam ntxhab muaj peev xwm tsim cov kav dej uas ua tau raws li cov qauv thoob ntiaj teb nruj. Raws li kev lag luam xav tau kev txhim khu kev qha cov pa roj carbon steel kav txuas ntxiv zuj zus, qhov tseem ceeb ntawm kev xaiv cov khoom siv kub zoo -rolled coil tseem yog ib qho tseem ceeb hauv kev ua kom cov khoom siv tau zoo thiab ntev ntev - cov kav xa dej.
