Seam Vuam Tshuab: Tiv thaiv kom tsis txhob tawg

Stainless hlau bellows yog dav siv nyob rau hauv pipeline them nyiaj, sealing tshuab, khoom siv nqus tsev vacuum, petrochemical kab, cov khoom siv fais fab, thiab cov cuab yeej precision. Lawv muaj nuj nqis rau lawv cov kev tiv thaiv corrosion, yoog raws, qaug zog ua haujlwm, thiab muaj peev xwm nqus tau kev co thiab hloov chaw. Nyob rau tib lub sijhawm, lawv yog qhov nyuaj rau vuam.

Qhov laj thawj yog yooj yim: phab ntsa yog nyias, thiab lub cev yog corrugated. Thaum lub sij hawm welding, lub tshav kub input tsis tuaj yeem siab dhau, thiab lub vuam log tsis tuaj yeem siab dhau. Cov seam yuav tsum tsis tu ncua thiab xau- nruj, tab sis cov corrugation peaks, hav, thiab qhov chaw hloov pauv yuav tsum tsis txhob raug tsoo lossis tawg. Yog tias qhov tam sim no, vuam ceev, lub log siab, qhov chaw kho qhov chaw, lossis txoj kev ua kom txias tsis zoo, kub hnyiab tau - dhau, tawg, phab ntsa puas, lossis seam tsis ua haujlwm yuav tshwm sim. Hauv qhov xwm txheej hnyav, tag nrho ib feem yuav raug tsis lees paub.

IbMFDC seam vuam tshuabNws yog tsim rau circumferential seams, longitudinal seams, thiab cov pob qij txha ntawm bellows seem thiab kawg hlab, flanges, los yog fittings. Nws muab cov zis ruaj khov tam sim no, cov khoom siv hluav taws xob muaj zog, thiab muaj peev xwm txuas txuas txuas ntxiv. Txawm li cas los xij, lub tshuab tsim nyog tsis tuaj yeem lav cov txheej txheem ruaj khov. Qhov kev sib tw tiag tiag hauv stainless hlau bellows vuam yog ua kom cov cua sov nkag, lub log siab, kev txhawb nqa, thiab vuam atherosclerosis hauv qhov nqaim thiab rov ua dua.

Cov phab ntsa nyias nyias muaj kev zam me me rau qhov kub thiab txias ntau dhau

Cov raj txheej txheem feem ntau muaj cov phab ntsa tuab dua thiab ua haujlwm ntev dua. Stainless hlau hauv qab yog txawv. Lawv cov phab ntsa yog nyias, thiab cov qauv corrugated ua rau lub zog faib tsis sib npaug. Thaum lub vuam log nias tawm tsam lub raj phab ntsa, me ntsis siab dhau tuaj yeem ua rau cov corrugation peaks. Yog tias qhov siab qis dhau lawm, kev sib cuag ntawm lub log thiab lub raj phab ntsa yuav tsis ruaj khov, uas yuav ua rau muaj cua sov hauv zos lossis kub hnyiab los ntawm -.

Vim li no, lub hauv caug tawg tsis tshua muaj tshwm sim los ntawm "ntau dhau tam sim no" lossis "siab dhau lawm." Nws feem ntau tshwm sim thaum tshav kub input thiab mechanical force tsis tswj ua ke. Ruaj khov cua sov nkag thiab txawm lub log siab yog ob qho tib si xav tau los txo qhov kev pheej hmoo tawg.

Stainless hlau tsis dissipate tshav kub sai

Stainless hlau ua cua sov qeeb dua li carbon steel. Thaum welding, cua sov nyiam nyob ze ntawm lub seam. Rau nyias- phab ntsa hauv qab, qhov no tsim qhov teeb meem pom tseeb: qhov kub thiab txias hauv zos nce sai, cov phab ntsa phab ntsa poob qis, thiab kev ntxhov siab shrinkage tshwm sim thaum txias.

Yog tias qhov vuam tam sim no siab dhau lawm, qhov vuam ceev qeeb dhau, lossis qhov txias tsis txaus thaum lub sij hawm vuam txuas ntxiv, cua sov tuaj yeem tsim nyob ze ntawm lub seam. Thaum xub thawj, qhov no yuav tshwm sim tsuas yog discoloration. Raws li kev tsim khoom txuas ntxiv, nws yuav ua rau kub hnyiab tau - dhau ntawm, tawg, seam embrittlement, los yog tsis zoo xau- nruj.

Corrugation ncov thiab hav tau txais kev quab yuam sib txawv

Bellows tsis yog cov raj du. Corrugation peaks, hav, thiab kev hloov chaw muaj qhov sib txawv. Yog hais tias lub vuam log profile tsis phim lub workpiece, lub siab tuaj yeem mloog zoo rau hauv qhov chaw me me. Qhov chaw siab tshaj plaws tuaj yeem raug tsoo, thaum thaj tsam hav yuav muaj kev sib cuag tsis ruaj khov thiab hauv zos overheating.

Qhov no yog vim li cas stainless hlau bellows seam welding tsis tuaj yeem tsuas yog siv tsis tau los ntawm cov ntawv tiaj tus lossis cov qauv raj vuam. Tib qhov tam sim no thiab lub siab yuav ua haujlwm ntawm ib qho chaw tiaj tus tab sis tawg cov qauv corrugated nyias.

Cov kab nrib pleb zoo nyob ntawm ntug weld

Cov kab nrib pleb no tuaj yeem me me thiab yuav tsis pom tam sim tom qab vuam. Lawv tuaj yeem tshwm sim thaum kuaj xau, kuaj hydrostatic, kuaj khoov, lossis tom qab sib dhos. Cov laj thawj feem ntau suav nrog cov khoom siv hluav taws xob ntau dhau, tsis ua tiav fusion, txias shrinkage kev ntxhov siab, cov khoom siv tsis xws luag, lossis ua ntej- vuam tsis zoo.

Yog hais tias cov kab nrib pleb yog concentrated nyob rau hauv weld ntug, xyuas welding tam sim no, vuam ceev, lub log siab, weld tsim, thiab cov khoom nto.

Cracking ntawm corrugation peaks

Yog tias cov kab nrib pleb feem ntau tshwm sim ntawm cov corrugation peaks, lub vuam log siab, lub log profile, kev txhawb nqa sab hauv, thiab kev txhawb nqa yuav tsum tau kuaj xyuas ua ntej. Lub ncov yog qhov feem ntau nthuav tawm ntawm lub hauv siab, thiab lub log siab yog feem ntau yuav mloog zoo rau ntawd. Yog tias tsis muaj kev txhawb nqa sab hauv lossis daim ntawv- haum cov cuab yeej, qhov chaw ncov nyias tuaj yeem yooj yim crushed lossis tawg.

Qhov teeb meem no tsis tuaj yeem daws tau los ntawm kev txo qis tam sim no ib leeg vim tias lub hauv paus ua rau feem ntau yog cov khoom siv dag zog.

Kev kub hnyiab hauv zos- dhau los lossis nyias- phab ntsa qhib

Kev kub hnyiab hauv zos- los ntawm feem ntau yog cuam tshuam nrog ntau dhau tam sim no, kev sib tsoo qeeb qeeb, kev sib cuag lub log tsis ruaj khov, lossis tsis txaus siab. Thaum lub vuam log tsis tiv thaiv lub raj phab ntsa sib npaug, tam sim no yuav mloog zoo rau hauv thaj chaw me me, ua rau muaj cua sov hauv zos tam sim.

Hom kab mob no feem ntau pom. Qhov chaw vuam tej zaum yuav pom blackening, qhov, vaum npoo, los yog hlau spatter.

Local cracking tom qab circumferential seam welding

Thaum cov welded mus rau qhov kawg cov raj, flanges, los yog fittings, tsis zoo concentricity, sib dhos ntau dhau, clamping tsis ruaj khov, los yog kev sib hloov tsis sib xws tuaj yeem ua rau muaj kev ntxhov siab hauv zos tom qab vuam. Lub voj voog ncig tej zaum yuav zoo li tsis tu ncua, tab sis ib ntu tuaj yeem tawg thaum lub caij txias los yog kev sim siab.

Nyob rau hauv cov ntaub ntawv no, welding tsis yog ib yam uas yuav tau xyuas. Kev sib dhos qhov tseeb thiab kev sib hloov ruaj khov yog qhov tseem ceeb.

Ntau dhau tam sim no lossis qeeb vuam ceev tuaj yeem ua rau hlawv - dhau

MFDC seam welding tshuab muab cov zis ruaj khov tam sim no, tab sis nyias - phab ntsa hauv qab yog qhov nkag siab heev rau cov cua sov. Cov tam sim no ntau dhau, lub zog mem tes ntau dhau, lossis qeeb vuam ceev tuaj yeem ua rau thaj tsam ntawm qhov kub thiab txias ntev ntev.

Kev kub dhau tuaj yeem ua rau ntau tshaj li hlawv - dhau. Nws kuj tseem tuaj yeem ua rau muaj qhov sib txawv ntawm cov xim tsaus nti, cov phab ntsa ntawm lub raj muag, embrittlement nyob ze ntawm ntug vuam, thiab tawg thaum lub caij txias. Rau cov hauv qab uas xav tau kev sib khi, kev tiv thaiv siab, lossis lub neej qaug zog, cov teeb meem no yog qhov txaus ntshai rau lub sijhawm ntev -.

Thaum lub sijhawm teeb tsa, tsis txhob tsuas yog tsom rau qhov pom lossis tag nrho fused weld. Kuj saib rau lub raj phab ntsa deformation, overheating, txawv xim weld, thiab xau kuaj stability.

Tam sim no me ntsis los yog vuam ceev heev kuj tuaj yeem tsim kev pheej hmoo tawg

Qee tus neeg ua haujlwm txo qis tam sim no lossis nce nrawm kom tsis txhob hlawv - dhau. Qhov no tuaj yeem txo qhov pom kev kub hnyiab, tab sis yog tias cov seam tsis muaj fused tag nrho, qhov chaw uas tsis muaj qhov sib xyaw ua ke tuaj yeem dhau los ua qhov pib tawg thaum lub sij hawm kuaj xau, ntsuas siab, kev vibration, lossis qaug zog loading.

Tiv thaiv cov kab nrib pleb tsis yog tsuas yog txo cov cua sov. Lub seam yuav tsum tsis txhob overheating thaum tseem ua tau zoo fusion. Ib txoj hauv kev txhim khu kev qha yog siv cov qauv ntsuas kom pom cov txheej txheem ruaj khov uas ua tau raws li lub zog thiab cov kev xav tau sib khi nrog qis qis tshaj qhov tsis tsim nyog cov cua sov.

Thaum tshav kub kub accumulates thaum nruam vuam

Ib qho qauv ua tiav tsis tuaj yeem lav ruaj khov ntau lawm. Thaum nruam vuam, vuam log, electrodes, workpiece, thiab conductive Cheebtsam tag nrho cov cua sov. Yog tias qhov txias txias tsis tuaj yeem khaws cia, cov khoom tom qab yuav pom cov xim xim tsaus dua, tawg ntau dua, tawg ntau dua, lossis qhov sib txawv ntawm qhov sib txawv.

Vim li no, txheej txheem validation yuav tsum tsis yog raws li ib tug qauv xwb. Kev ntsuas luv luv txuas txuas txuas tau pom zoo kom muab piv rau thawj qhov chaw nrog cov khoom tom qab hauv cov ntsiab lus ntawm cov khoom siv vuam, cov txiaj ntsig kev kuaj pom, tawg, thiab qhov ruaj khov.

Kev siab dhau heev tuaj yeem ua rau nyias nyias - cov hlab ntsa

Cov phab ntsa hauv qab yog nyias, yog li lub siab hnyav yuav tsum tsis txhob siv yooj yim los yuam kev sib cuag. Yog tias lub siab siab dhau lawm, corrugation peaks, qhov kawg hloov, thiab cov seem tsis muaj zog yuav raug crushed los yog tawg. Rau nyias-wall stainless steel bellows, ruaj khov thiab txawm tias siab yog qhov tseem ceeb tshaj qhov siab dua.

Yog hais tias lub corrugation peaks yog flattened, log marks tob heev, los yog cov kab nrib pleb tshwm nyob rau hauv lub siab tiv tauj cov ntsiab lus, ua ntej xyuas seb lub siab yog siab dhau lawm, seb lub log sib tiv tauj cheeb tsam yog me me, thiab seb lub workpiece puas muaj txaus sab hauv.

Lub siab me me tuaj yeem ua rau muaj cua sov hauv zos

Yog tias lub siab qis dhau, kev sib cuag ntawm lub vuam log thiab lub raj phab ntsa yuav tsis ruaj khov. Tam sim no ces concentrates ntawm cov ntsiab lus me me. Lub siab yuav zoo li muaj kev nyab xeeb dua, tab sis qhov kub thiab txias hauv zos tuaj yeem siab dua, ua rau kub hnyiab - dhau, tawg, lossis tawg.

Nyob rau hauv seam welding, siab, tam sim no, thiab vuam ceev yuav tsum tau kho ua ke. Txo qhov tam sim no yam tsis tau kuaj xyuas lub siab, lossis nce siab yam tsis tau kuaj xyuas cov xwm txheej, tsis tshua muaj kev daws teeb meem tawg rau hauv txoj kev ruaj khov.

Ib qho tsis siv lub vuam log profile tuaj yeem ua rau muaj kev puas tsuaj hauv zos

Stainless hlau bellows muaj qhov tshwj xeeb geometry. Yog tias tus qauv tiaj tus- daim ntawv seam welding log yog siv, qhov kev sib cuag ntawm qhov dav yuav nqaim dhau, ua kom muaj zog hauv thaj chaw me me. Rau qhov sib txawv ntawm txoj kab uas hla, corrugation heights, thiab weld txoj hauj lwm, lub log profile yuav tsum tau sib phim rau lub workpiece.

Rau nyias-phab ntsa bellows, txoj cai vuam log thiab cov qauv kev txhawb nqa feem ntau txhim kho qhov txiaj ntsig zoo dua li qhov kev hloov pauv ib leeg. Lub log yuav tsum muab kev sib cuag ruaj khov thiab tsis txhob muaj lub zog hauv zos ntau dhau ntawm qhov siab tshaj plaws, ntug, lossis qhov chaw hloov pauv.

Lub log misalignment tsim rov qab hloov pauv siab

Thaum lub sij hawm circumferential seam welding, lub raj tig. Yog hais tias lub welding log thiab lub raj centerline tsis sib haum, lub siab hloov nyob rau hauv txhua qhov kev sib hloov. Qee ntu tuaj yeem ua kom sov, thaum lwm tus tuaj yeem raug crushed, ua rau hauv zos tawg lossis ib qho seam tsis sib haum.

Ua ntej vuam, xyuas lub log sib dhos, workpiece clamping concentricity, thiab rotational stability. Yog hais tias lub raj dhia los yog khiav eccentrically thaum lub sij hawm tig, weld zoo yuav nyuaj rau tswj.

Yog tias tsis muaj kev txhawb nqa sab hauv, nyias- cov hlab ntsa tuaj yeem tawg

Thaum vuam nyias- phab ntsa hauv qab, kev txhawb nqa sab hauv yog qhov tseem ceeb heev. Yog tsis muaj qhov tsim nyog mandrel lossis kev txhawb nqa sab hauv, lub log siab ua ncaj qha rau ntawm phab ntsa nyias nyias, uas tuaj yeem deform, flatten, los yog tawg ntawm ib feem.

Lub luag haujlwm ntawm kev txhawb nqa sab hauv tsis yog los tuav lub workpiece xwb. Nws pab tswj kom muaj kev sib tw thiab tso cai rau lub log siab ua kom sib npaug ntawm thaj chaw weld. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog qhov uas ntu ntu txuas mus rau qhov kawg tube, flange, lossis haum, vim tias qhov nruj hloov pauv hauv cov cheeb tsam ntawd.

Tsis ruaj khov clamping tuaj yeem ua rau lub tshuab ua haujlwm hloov thaum vuam

Yog hais tias lub hauv paus tsis clamped ruaj ntseg, lub workpiece yuav hloov, wobble, los yog khiav tawm thaum lub sij hawm vuam. Rau cov tuab tuab, qhov kev txav me me no yuav tsis muaj teeb meem ntau. Rau nyias- phab ntsa hauv qab, nws tuaj yeem ua rau vuam offset, lub log khawb, tawg hauv zos, lossis kev sib koom ua tsis zoo.

Lub fixture yuav tsum tuav qhov chaw ruaj khov yam tsis muaj dhau -clamping thiab tawm cov qhab nia sab nraum qhov chaw vuam. Rau cov seams circumferential, cov txheej txheem kev sib hloov yuav tsum tau ua haujlwm zoo yam tsis muaj dhia.

Ntau qhov sib txawv ntawm qhov kawg ntawm lub raj, flange, thiab lub tshuab nqus dej ua rau muaj kev pheej hmoo tawg

Thaum cov kab txuas txuas mus rau qhov kawg cov raj lossis flanges, qhov kawg tsis sib xws, tsis sib xws ntau dhau, lossis qhov sib txawv tsis sib xws tuaj yeem ua rau lub zog tsis sib xws thiab tsis sib xws thaum lub vuam vuam. Tom qab txias, cov chaw no tuaj yeem dhau los ua cov ntsiab lus tawg.

Kev sib dhos tsis zoo feem ntau tsis tuaj yeem kho los ntawm kev sib txuas vuam ib leeg. Ua ntej vuam, xyuas qhov kawg flatness, concentricity, haum -txoj kev mob, thiab clamping stability kom txo cov qauv sib txawv thaum vuam.

Cov khoom siv tsis xws luag tuaj yeem ua tawg tom qab vuam

Yog hais tias cov khoom siv stainless hlau bellows muaj inclusions, microcracks, lub thickness ntawm phab ntsa tsis sib xws, tsim kev puas tsuaj, los yog lub zos qaug zog tsis xws luag, lub vuam thermal voj voog yuav ua rau cov tsis xws luag. Yog tias qee qhov chaw tawg nyob rau hauv tib qhov tsis sib xws thaum lwm tus nyob ruaj khov, cov khoom tuaj yuav tsum tau kuaj nrog lub tshuab.

Rau nyias- phab ntsa hauv qab, cov khoom muaj cov npoo me me rau qhov tsis xws luag. Ua ntej vuam, nws yog ib qho tseem ceeb los xyuas cov phab ntsa thickness, corrugation tsim zoo, nto khawb, kawg zoo, thiab batch sib xws.

Roj, noo noo, lossis oxide nyob rau hauv qhov chaw vuam cuam tshuam rau kev tsim cov vuam

Roj, noo noo, oxides, plua plav, thiab machining residue tuaj yeem cuam tshuam rau lub log thiab kev tsim vuam. Vuam nyob rau hauv ib qho chaw ntub dej kuj tuaj yeem qhia qhov pores, kev sib kis, thiab qhov chaw tsis xws luag.

Ua ntej- vuam vuam tej zaum yuav zoo li yooj yim, tab sis nws yog ib qho tseem ceeb rau kev sib khi thiab qhov chaw siab. Qhov chaw vuam yuav tsum qhuav thiab huv si, thiab qhov kawg yuav tsum tsis pub pom cov roj, oxide, dej, thiab khib nyiab.

Cov khoom nplaum ntawm lub vuam log tuaj yeem rhuav tshem lub raj phab ntsa

Yog hais tias lub vuam log nto tau ua hlau, khawb, hnav, lossis burrs, nws tuaj yeem rub tawm ntawm phab ntsa nyias lub raj thaum vuam. Vim tias cov phab ntsa hauv qab yog nyias heev, txawm tias rub me ntsis tuaj yeem tsim kua muag me me.

Lub vuam log yuav tsum tau ntxuav, hnav khaub ncaws, thiab hloov tsis tu ncua kom lub ntsej muag du, qhov profile ruaj khov, thiab ua kom txias zoo. Tsis txhob tos kom txog thaum weld tsis xws luag los yog lub raj phab ntsa puas tshwm sim ua ntej tuav lub log.

Ua lub qhov rais txheej txheem ruaj khov ua ntej

Thaum teeb tsa, tsis txhob kho qhov tam sim no xwb. Cov ntaub ntawv tam sim no, vuam ceev, hom mem tes, lub log siab, nyem lub sij hawm, txias txias, thiab tom qab-weld tau ua ke.

Ib qho kev ntsuas zoo yuav tsum ua tau raws li peb yam xwm txheej: tsis muaj qhov kub hnyiab- dhau los, kev sib txuas zoo, thiab ruaj khov los yog kev ntsuas kev ua haujlwm siab. Kev txiav txim tsuas yog los ntawm qhov tsos tuaj yeem yooj yim ua rau cov lus xaus tsis raug.

Siv cov welding log thiab kev txhawb nqa cov qauv tsim los rau hauv qab

Bellows welding yuav tsum siv vuam log sib phim rau lub raj txoj kab uas hla, corrugation qhov siab, thiab weld txoj hauj lwm. Thaum xav tau, siv lub mandrel sab hauv, kev txhawb nqa lub log, lossis daim ntawv -fitting fixture kom lub siab sib npaug sib npaug hauv qhov chaw vuam.

Tsis txhob siv tus qauv tiaj tus- daim ntawv seam vuam log rau txhua qhov kev qhia tshwj xeeb. Cov phab ntsa sib txawv, qhov siab corrugation, thiab cov qauv sib koom ua ke yuav xav tau cov log sib txawv thiab kev txhawb nqa.

Tswj kom haum- nce qhov khoob thiab qhov sib npaug

Ua ntej vuam, xyuas qhov kawg flatness, mismatch, concentricity, thiab clamping stability. Rau cov seams ncig, lub workpiece yuav tsum tig smoothly tsis dhia lossis eccentric txav.

Qhov ruaj khov dua qhov sib dhos, qhov yooj yim dua nws yog ua kom cov vuam tsis sib xws. Yog tias qhov haum- nws tus kheej muaj qhov sib txawv loj, qhov vuam ruaj khov yog qhov nyuaj txawm tias qhov ntsuas tsis raug kho li cas.

Tswj vuam sib dhos kom tsis txhob muaj cua sov

Thaum lub sij hawm tas mus li ntau lawm, saib xyuas vuam log kub, workpiece kub, thiab weld xim hloov. Yog tias cov kab nrib pleb nce ntxiv tom qab, qhov teeb meem yuav tsis yog qhov hloov pauv tam sim ntawd. Tej zaum nws yuav yog cua sov buildup los yog tsis txaus cua txias.

Qhov no tuaj yeem txhim kho los ntawm kev ua kom lub sijhawm voj voog zoo, ntxiv dag zog rau qhov txias txias, thiab tshuaj xyuas lub vuam lub log tsis tu ncua. Rau batch ntau lawm, sau cov weld hloov thaum lub sij hawm ua hauj lwm tas mus li, tsis yog thawj - cov txiaj ntsig.

Ntxuav ua ntej vuam thiab txias hauv qab tswj tom qab vuam

Tshem cov roj, noo noo, thiab oxides ua ntej vuam. Tom qab vuam, tsis txhob cia txias txias thiab thaum ntxov txav ntawm qhov. Rau siab - cov khoom yuav tsum tau ua, ua cov pa xau, siab, lossis tsis yog - kev ntsuas kev puas tsuaj raws li tus neeg siv khoom tus qauv.

Cov kauj ruam no yuav zoo li yooj yim, tab sis rau nyias - phab ntsa stainless hlau bellows, lawv feem ntau muaj kev cuam tshuam ncaj qha rau kev tawm los.

Xaus

Tube phab ntsa tawg nyob rau hauv stainless hlau bellows seam welding feem ntau tsis tshwm sim los ntawm ib qho parameter ib leeg. Cov yam ntxwv tiag tiag los tswj yog cov khoom siv hluav taws xob, vuam lub log siab, kev txhawb nqa fixture, kev sib dhos raug, cov khoom siv, thiab tom qab- vuam txias.

Kev txo qis tam sim no ib leeg tsis txaus, thiab tsuas yog nce siab tuaj yeem tsim teeb meem tshiab. Ib txoj hauv kev txhim khu kev qha ntau dua yog tsim kom muaj qhov ruaj khov vuam txheej txheem qhov rais, tom qab ntawd siv cov vuam log, kev txhawb nqa sab hauv, kev sib txuas, thiab kev tswj cov cua txias uas phim cov qauv hauv qab. Rau kev sib khi, siab, lossis siab - daim ntawv thov kev ntseeg siab, kev sim xau, kev sim hydrostatic, lossis tsis yog- kev ntsuas kev puas tsuaj yuav tsum tau siv los xyuas kom meej qhov zoo ntawm vuam.

Yog tias koj tab tom cuam tshuam nrog stainless hlau bellows cracking, hlawv-los ntawm, tsis zoo leak-tightness, los yog seam tsis ua hauj lwm, koj tuaj yeem xa Haifei koj cov khoom siv hauv plab, phab ntsa thickness, corrugation qhov ntev, weld txoj hauj lwm, kev sib koom ua ke, cov kev xav tau, thiab cov hom phiaj ntau lawm. Peb tuaj yeem pab ntsuam xyuas qhov tsim nyog MFDC seam vuam tshuab, vuam lub cuab yeej, thiab kev siv lub tshuab vuam vuam siv raws li koj qhov ua haujlwm tiag tiag.

Hu rau tam sim no