Cov khoom siv raj ncaj qha txiav txim siab cov khoom siv cua txias los tiv thaiv- muaj peev xwm corrosion thiab tag nrho cov khoom siv tau ntev, ua rau kev xaiv ntawm cov hlau tsis muaj steel thiab carbon hlau yog cov peev nyiaj tseem ceeb thiab kev txiav txim siab ntev rau cov neeg yuav khoom.Cov pa roj carbon steel dominates tus qauv loj- cov khoom tsim rau nws cov khoom siv qis qis, thaum stainless hlau tseem yog tus nqi hloov kho rau qhov chaw ua haujlwm hnyav. Misjudging qhov chaw corrosion feem ntau ua rau ntxov ntxov tube pob perforation thiab unplanned ntau lawm shutdowns, yog li ib tug meej kev sib piv ntawm lawv tiag tiag - ntiaj teb no kev ua tau zoo qhia cov khoom specification xaiv.
Cov pa roj carbon steel raj tsim tus nqi pib rau kev lag luam cua txias, ua ke nrog kub -dip galvanized nto kho kom xa cov xeb yooj yim rau cov chaw ua haujlwm huv hauv av.Tus nqi raw khoom qis txo qis tag nrho cov nqi yuav khoom loj, ua rau cov pa roj carbon steel yog qhov kev xaiv loj rau - ntim cov txheej txheem cov khoom xaj hauv cov tshuab sib dhos thiab cov chaw ua zaub mov yam tsis muaj tshuaj vapor raug. Galvanized txheej tsim ib qho kev tiv thaiv me me tiv thaiv cov av noo me ntsis, tab sis kev sib cuag nrog ntsev pos huab, acidic pa pa los yog siab - huab cua ntawm ntug dej hiav txwv sai sai hnav cov txheej. Thaum pom cov hlau liab qab oxidizes sai, tsim cov pinhole leaks hauv 2-3 xyoos nyob rau hauv nruab nrab corrosive aav, yuav tsum tau tag nrho cov raj pob hloov uas tshem tawm tag nrho cov nqi pib txuag ntawm koj.cua txias cua sov exchanger.
Stainless hlau raj (304 thiab 316L qib) muaj chromium thiab molybdenum alloys uas tsim nws tus kheej- kho passive anti-corrosion zaj duab xis ntawm cov hlau nto, tiv thaiv oxidation, chloride ion yaig thiab qaug zog acid vapor nkag mus ntev -.304 stainless haum rau cov ntug dej hiav txwv me me ntsev- huab cua ib puag ncig, thaum 316L ntxiv molybdenum ntxiv kom tiv taus cov tshuaj lom neeg muaj zog los ntawm refinery thiab electroplating rhiav emissions. Stainless tube bundles tuav tag nrho lub siab ncaj ncees thiab ruaj khov thaum tshav kub kub hloov efficiency rau 10-15 xyoo nrog tsawg txij nkawm, tshem tawm ib nrab-lifecycle tube hloov downtime. Qhov tsuas yog downside yog siab dua raw khoom thiab vuam cov nqi zog, nce upfront khoom peev los ntawm 30% mus rau 60% piv rau galvanized carbon steel lwm.
Txhawm rau sib npaug tus nqi thiab kav ntev, tier koj cov khoom xaiv los ntawm qhov chaw muaj kev pheej hmoo corrosion.Qhuav hauv av dav dav kev cob qhia tuaj yeem ua tau zoo siv galvanized carbon steel raj los tswj kev siv nyiaj txiag. Cov chaw hauv ntug dej hiav txwv, cov chaw ua tshuaj lom neeg thiab cov chaw lag luam tawm sab nrauv yuav tsum xaiv cov tubing stainless hlau kom tsis txhob rov ua dua lub raj ntim cov khoom siv thiab kev cuam tshuam ntau lawm, ua kom ntev ntev - cov cuab yeej siv kev ntseeg tau ntau xyoo ntawm kev ua haujlwm tas mus li.
