Q1: Dab tsi yog qhov txhais cov yam ntxwv ntawm Hastelloy C-22 daim ntawv piv rau phaj, thiab thaum twg tus neeg tsim khoom yuav tsum xaiv daim ntawv hla lub phaj rau cov khoom siv tshuaj?
Teb:
Qhov sib txawv ntawm Hastelloy C-22 daim ntawv thiab phaj yog feem ntau raws li thickness, tab sis qhov sib txawv ntawm qhov sib txawv muaj qhov cuam tshuam loj rau kev muaj, formability, fabrication cov tswv yim, thiab tus nqi optimization hauv cov khoom siv tshuaj.
Txhais thiab Classification:
Raws li ASTM B575, kev tswj xyuas tshwj xeeb rau C-22 cov khoom tiaj tus:
Daim ntawv: Feem ntau txhais tau tias yog cov khoom < 3/16 "(4.76 mm) thickness. Sheet yog tsim los ntawm txias dov, uas ua rau superior nto tiav, tighter dimension tolerances, thiab zoo flatness piv rau phaj.
Phaj: Cov khoom loj dua lossis sib npaug li 3/16 "(4.76 hli) hauv thickness. Phaj feem ntau yog tsim los ntawm kub dov thiab tej zaum yuav muaj ib lub zeb nplai uas yuav tsum tau tshem tawm ua ntej fabrication.
Thaum xaiv Sheet Over Plate:
Vessel Linings thiab Cladding: Rau hauv ob sab phlu carbon steel hlab ntsha (qhov feem ntau daim ntawv thov rau C-22), cov ntawv nyias (feem ntau 1.6 mm txog 3.2 mm / 1/16 "mus rau 1/8") muab cov corrosion kuj ntawm cov khoom alloy ntawm ib feem ntawm tus nqi ntawm cov khoom siv phaj. Daim ntawv ua raws li kev tiv thaiv corrosion thaum cov pa roj carbon steel muab kev txhawb nqa.
Ductwork thiab Tsawg- Cov Cheebtsam Siab: Hauv cov tshuab hluav taws xob desulfurization (FGD), tshuaj fume tuav, thiab qhov cua, daim ntawv yog qhov kev xaiv zoo rau cov ducts, pawg, thiab cov tshuaj txhuam hniav uas muaj kev kub siab tab sis siab corrosivity.
Complex forming Operations: Sheet lub ductility ntau dua (vim qhov txias dov thiab nyias seem) tso cai rau nruj dua khoov radii thiab ntau cov duab tsis muaj cracking. Qhov no yog qhov tseem ceeb rau cov khoom xws li cov pob qij txha nthuav dav, baffles, thiab cov kav dej sib hloov.
Qhov hnyav- Cov ntawv thov rhiab heev: Hauv cov platforms offshore lossis cov cuab yeej raug tshem tawm, siv cov ntawv tsis siv phaj tuaj yeem txo qhov hnyav thaum tswj kev tiv thaiv corrosion.
Kev Txhim Kho Tus Nqi: Daim ntawv tsis tshua kim ib square feet dua li phaj. Los ntawm kev siv daim ntawv rau tsis yog- siab- muaj cov khoom siv thiab cov phaj tshwj xeeb rau siab- khaws cov khoom thiab siab - qhov siab, cov neeg tsim khoom tuaj yeem txhim kho cov nqi khoom.
Lub Caveat: Daim ntawv tsis tuaj yeem siv qhov twg tsim lub siab xav tau cov ntu tuab. Nco ntsoov xyuas tias cov thickness xaiv tau raws li qhov xav tau ntawm kev siv tshuab.
Q2: Vim li cas Hastelloy C-22 daim ntawv yog cov khoom siv tseem ceeb xaiv rau hauv ob sab phlu gas desulfurization (FGD) absorber towers thiab ductwork?
Teb:
Flue Gas Desulfurization (FGD) systems sawv cev rau ib qho ntawm feem ntau corrosive ib puag ncig nyob rau hauv kev lag luam kev pab cuam, thiab Hastelloy C-22 daim ntawv tau dhau los ua cov khoom ntawm kev xaiv rau hauv ob sab phlu cov qauv loj vim nws tshwj xeeb ua ke ntawm corrosion kuj, fabricability, thiab lifecycle economics.
FGD Corrosion Challenge:
FGD cov tshuab tshem tawm SO₂ los ntawm cov hluav taws xob cog hluav taws xob siv cov limestone slurry. Ib puag ncig muaj xws li:
Condensing Acids: Sulfuric thiab sulfurous acids tsim thaum flue gases txias hauv qab dej lwg taw tes.
High Chlorides: Coal muaj chlorides uas mloog zoo rau hauv slurry, feem ntau tshaj 100,000 ppm.
Fluorides: Tam sim no ua impurities hauv thee, tsim hydrofluoric acid.
Abrasion: Cov khoom siv (gypsum, ya tshauv) ua rau yaig -corrosion.
Thermal Cycling: Cov txheej txheem pib ua haujlwm tsis tu ncua -ups thiab kaw -downs.
Vim li cas C-22 Sheet Excels:
Superior Localized Corrosion Resistance: C-22's siab chromium (20-22.5%) thiab molybdenum (12.5-14.5%) muab tshwj xeeb rau pitting thiab crevice corrosion nyob rau hauv chloride-nplua nuj deposits-lub hom phiaj tsis ua hauj lwm rau tsawg alloys nyob rau hauv FGD kev pab cuam.
Oxidizing/Reduction Balance: FGD ib puag ncig viav vias ntawm kev txo qis (cov slurry) thiab oxidizing (condensing acids nrog oxygen). C-22's balanced chemistry tuav ob txoj cai tsis muaj kev tawm tsam hauv zos.
Fluoride kam rau ua: Txawm tias tsis zoo li fluoride-tiv taus li C-2000, C-22 ua tau zoo nyob rau hauv cov tshuaj fluoride ntau npaum li cas ntawm feem ntau cov thee hluav taws xob fais fab nroj tsuag.
Thermal Cycle Stability: C-22 tuav nws cov kev tiv thaiv corrosion los ntawm cov thermal voj voog uas muaj nyob rau hauv FGD kev ua haujlwm, tsis zoo li qee cov ntaub ntawv uas degrade nrog kub hloov pauv.
Qhov zoo ntawm Sheet Liner:
Siv cov ntawv nyias (feem ntau 1.6 mm lossis 2.0 mm / 1/16” lossis 5/64”) raws li cov ntaub ntawv muaj:
Tus nqi Efficiency: A 1.6 hli C-22 liner muab kev tiv thaiv corrosion ntawm cov khoom hlau ntawm ib feem ntawm tus nqi ntawm cov phaj tuab.
Weldability: Cov ntawv nyias nyias tau yooj yim welded rau lawv tus kheej thiab txuas cov hlua khi ntawm cov pa roj carbon steel siv cov txheej txheem automated lossis semi-automated GTAW txheej txheem.
Kev Kho Kom Zoo: Cov seem liner puas tuaj yeem raug txiav tawm thiab hloov pauv yam tsis muaj kev cuam tshuam rau kev ncaj ncees ntawm lub nkoj.
Kev Ua Tau Zoo: Cov kev paub dhau los nyob rau ntau xyoo tau pom tias C-22 cov ntaub ntawv tuaj yeem muab tau 20+ xyoo ntawm kev pabcuam hauv FGD ib puag ncig.
Q3: Dab tsi yog qhov tseem ceeb rau kev tsim cov ntawv Hastelloy C-22 rau hauv cov duab nyuaj xws li lub taub hau, cov pob qij txha, thiab baffles?
Teb:
Kev tsim Hastelloy C-22 daim ntawv rau hauv cov duab nyuaj yuav tsum muaj kev nkag siab ntawm cov hlau ua haujlwm hardening cov yam ntxwv, lub caij nplooj ntoos hlav-rov qab tus cwj pwm, thiab kev txwv ductility. Kev ua tiav zoo khaws cov khoom siv tiv thaiv corrosion thaum ua tiav qhov xav tau geometry.
Cov yam ntxwv ua haujlwm Hardening:
C-22 qhia txog kev ua haujlwm siab dua li austenitic stainless hlau. Qhov no txhais tau tias:
Ua kom muaj zog thaum lub sij hawm tsim: Cov khoom yuav muaj zog thiab nyuaj dua vim nws deformed, yuav tsum muaj ntau dua kev sib sau ua haujlwm rau kev ua tiav.
Kev txo qis qis qis: Kev mob khaub thuas hnyav tuaj yeem txo cov ductility thiab tej zaum yuav xav tau qhov nruab nrab annealing yog tias xav tau ntau yam txheej txheem.
Caij nplooj ntoos hlav-Kev them nyiaj rov qab:
Vim nws lub zog muaj zog thiab ua haujlwm hnyav, C-22 nthuav tawm lub caij nplooj ntoos hlav rov qab ntau dua li cov hlau tsis muaj steel. Cov khoom siv tuag thiab kev tsim khoom yuav tsum tau tsim nrog:
Tshaj - dabtsi yog khoov: Txhawb rau lub caij nplooj ntoos hlav- rov qab los ntawm kev khoov dhau lub kaum sab xis uas xav tau.
Ntau Tonnage: Xovxwm nres thiab cov cuab yeej tsim yuav tsum tau ntsuas rau cov zog ntau dua li qhov sib npaug ntawm cov pa roj carbon lossis cov hlau tsis muaj steel.
Khoov Radius Cov Lus Pom Zoo:
Rau C-22 daim ntawv, qhov tsawg kawg nkaus khoov radii feem ntau yog:
Transverse Bending: 1-2 zaug daim ntawv thickness (nyob ntawm thickness thiab℃ntawm kev sib sau).
Longitudinal Bending: 2-3 zaug daim ntawv tuab (vim cov khoom taw qhia los ntawm dov).
Tighter radii ua rau muaj kev pheej hmoo ntawm kev tawg thiab yuav tsum tau zam tshwj tsis yog cov khoom kub tsim los yog annealed tom qab tsim.
Kub txoj kev xav txog:
Rau cov contours loj (xws li tob-kos taub hau los yog complex expansion pob qij txha):
Kev Kub Kub: Kub sib sau feem ntau ua tau ntawm 927-1177℃(1700-2150℃F).
Tsis txhob hnov qab txog ntau yam: Tsis txhob cuam tshuam ntev mus rau 595-815℃(1100-1500℃F) thaum cua sov lossis txias, vim qhov no tuaj yeem ua rau muaj kev puas tsuaj rau theem nag lossis daus.
Tom qab-Kev Kho Mob Kub Kub: Tom qab kub sib sau, cov tshuaj annealing yuav tsum tau los kho qhov zoo tshaj plaws corrosion kuj.
Lubrication thiab Tooling:
Siv hnyav- lub luag haujlwm lubricants los tiv thaiv galling (ib qho teeb meem tshwm sim nrog nickel alloys).
Siv cov cuab yeej ua los ntawm lossis coated nrog cov ntaub ntawv uas tiv thaiv galling, xws li cov cuab yeej steel nrog titanium nitride txheej.
Xyuas kom cov cuab yeej nto du thiab tsis muaj qhov tsis xws luag uas tuaj yeem kos daim ntawv.
Q4: Cov txheej txheem vuam dab tsi yog qhov zoo tshaj plaws rau kev sib koom ua ke nyias Hastelloy C-22 daim ntawv (1.6 hli txog 3.2 hli) thaum tswj kev tiv thaiv corrosion thiab txo qis distortion?
Teb:
Vuam nyias C-22 daim ntawv nthuav tawm cov kev sib tw tshwj xeeb: qhov yuav tsum tau muaj kev tiv thaiv corrosion thaum tsis txhob hlawv-dhau, distortion, thiab oxidation. Cov txheej txheem ua haujlwm rau cov phaj tuab yuav tsum tau hloov kho rau cov thermal rhiab heev ntawm cov ntawv nyias.
Cov txheej txheem vuam nyiam:
GTAW (TIG) nrog Pulsed Tam Sim No: Qhov no yog cov txheej txheem ntau tshaj plaws thiab muaj txiaj ntsig zoo rau daim ntawv nyias C-22. Pulsed tam sim no tso cai rau tus welder los tswj cov cua sov input precisely, alternating ntawm ib tug siab ncov tam sim no rau nkag mus thiab ib tug tsawg keeb kwm yav dhau tam sim no rau txias. Cov txiaj ntsig muaj xws li:
Txo cov cua kub nkag thiab distortion.
Kev tswj zoo dua ntawm lub pas dej ua ke.
Txhim kho cov hlaws zoo li.
GMAW (MIG) nrog luv-Circuit Transfer: Rau cov vuam ntau lawm, luv-circuit hloov nrog cov kab me me (0.035" lossis 0.045") tuaj yeem ua tau zoo. Txawm li cas los xij, yuav tsum tau saib xyuas kom tsis txhob muaj fusion.
Plasma Arc Vuam (PAW): Rau kev siv lub tshuab vuam ntawm cov seams ntev, PAW muaj kev nkag mus tob thiab nrawm nrog qhov sib txawv me me.
Cov txheej txheem tseem ceeb rau daim ntawv nyias:
Ntug Kev Npaj: Rau cov ntawv nyias, cov pob qij txha pob tw feem ntau yog siv. Cov ntug yuav tsum huv si, ncaj, thiab ua kom zoo.
Backing Gas: Rov qab-purging nrog argon yog qhov tseem ceeb rau kev tiv thaiv hauv paus. Yog tsis muaj nws, sab nraub qaum ntawm lub vuam yuav oxidize, tsim kom muaj chromium -depleted txheej susceptible corrosion. Rau cov ntawv nyias, qhov no yog qhov tseem ceeb tshaj plaws vim tias cov hauv paus hniav yog feem pua ntawm tag nrho cov vuam.
Fixturing thiab Clamping: Cov ntawv nyias nyias tuaj yeem cuam tshuam. Kev kho kom zoo nrog cov tooj liab thim rov qab (uas ua raws li cov dab dej kub) pab tswj cov cua sov tsim thiab tswj kev sib tw.
Kev Ceev Ceev: Kev mus los sai dua kom txo tau cov cua sov nkag thiab qhov sib txawv tab sis yuav tsum muaj kev tswj xyuas kom muaj kev nkag mus.
Filler Hlau Xaiv: Siv ERNiCrMo-10 muab tub lim hlau, feem ntau 0.035" lossis 0.045" txoj kab uas hla rau cov ntawv nyias. Qee zaum, autogenous welding (tsis muaj qhov muab tub lim) yuav siv tau rau daim ntawv nyias nyias, tab sis qhov no yuav tsum tau nruj nruj nruj thiab tuaj yeem txo qhov kev tiv thaiv corrosion hauv thaj tsam weld.
Ncej -Kev kho Weld:
Tshem tawm cov cua sov los ntawm cov hlau txhuam hniav nrog cov txhuam stainless hlau tshwj xeeb rau C-22.
Rau cov kev pabcuam tseem ceeb, pickling hauv nitric -hydrofluoric acid tov tej zaum yuav tsum tau los kho lub passive nto tag nrho.
Q5: Yuav ua li cas lub nto tiav ntawm Hastelloy C-22 daim ntawv cuam tshuam nws cov kev ua tau zoo nyob rau hauv kev siv tshuaj thiab high-purity tshuaj, thiab dab tsi tiav yog feem ntau teev?
Teb:
Hauv kev siv tshuaj, biopharmaceutical, thiab siab - cov ntaub ntawv siv tshuaj purity, qhov ua tiav ntawm C-22 daim ntawv yog qhov tseem ceeb rau cov khoom zoo, huv si, thiab kev tiv thaiv corrosion mus ntev. Kev sib cuam tshuam ntawm qhov chaw topography thiab txheej txheem ib puag ncig cuam tshuam ncaj qha rau kev ua haujlwm.
Vim li cas Surface Finish Matters:
Cleanability: Cov kab mob microbes thiab cov txheej txheem residues tuaj yeem nkaum hauv qhov tsis sib xws. Qhov chaw du (qis Ra qhov tseem ceeb) muaj tsawg dua qhov kev sib kis uas muaj cov kab mob sib kis tau yooj yim dua thiab yooj yim los ntxuav - hauv - qhov chaw (CIP). Rau kev siv tshuaj, qhov ua tiav ntawm Ra Tsawg dua lossis sib npaug rau 0.4 μm (16 μin) feem ntau yuav tsum tau ua.
Corrosion Initiation: Cov chaw ntxhib muab ntau qhov chaw nucleation rau pitting thiab crevice corrosion. Nyob rau hauv siab -kev pabcuam tshuaj purity, txawm tias me me corrosion kuj tuaj yeem paug cov khoom.
Cov Khoom Tso Tawm: Hauv cov khoom siv polymerization reactors thiab kev ua zaub mov, qhov chaw du tiv thaiv cov khoom los ntawm kev ua raws thiab tsim cov phab ntsa ntawm cov hlab ntsha, ua kom cov khoom zoo sib xws thiab txo cov sijhawm tu.
Passivation Effectiveness: Lub ntsej muag du, huv si tso cai rau kev tsim cov yeeb yaj kiab tsis sib xws, ua kom muaj zog tiv thaiv corrosion.
Common Finish Designations rau C-22 Sheet:
Mill Finish (2B lossis No. 2B Finish): Tus qauv txias- dov, annealed, thiab pickled tiav. Haum rau kev siv dav hauv kev lag luam thiab rau qhov chaw uas yuav polished thaum fabrication. Hom Ra: 0.5-1.0 μm.
Mechanical Polish (Tsis yog. 4 Finish): Ib qho txhuam txhuam ua tiav los ntawm cov abrasives, feem ntau 150-180 grit. Feem ntau hauv kev ua zaub mov thiab kev siv tshuaj tsawg dua. Hom Ra: 0.4-0.8 μm.
Dull Buffed Finish (Tsis yog. 6 Finish): Ib ntu polishing luv luv nrog txoj siv grit ua raws li qhov sib xyaw buffing. Muab lub ntsej muag du dua No. 4. Hom Ra: 0.2-0.4 μm.
Daim iav tiav (Tsis yog. 8 Tiav): Ib qho kev xav zoo heev, tsis yog - kev taw qhia tiav ua tiav los ntawm kev sib txuas ua ke nrog cov khoom zoo ntxiv (feem ntau txog li 400 grit lossis siab dua) ua raws li buffing. Siv rau kev siv tshuaj thiab biopharmaceutical tseem ceeb. Hom Ra: Tsawg dua lossis sib npaug li 0.2 μm.
Kev txiav txim siab Specification:
Thaum qhia meej nto tiav rau C-22 daim ntawv:
Qhia Ra Tus Nqi: Qhia qhov siab tshaj plaws qhov nruab nrab roughness (piv txwv li, Ra Tsawg dua lossis sib npaug rau 0.4 μm) es tsis yog tus lej tiav, raws li Ra muab lub hom phiaj ntsuas tau, ntsuas tau.
Polish Direction: Rau cov hlab ntsha uas xav tau unidirectional polishing (xws li, rau cov kua dej), qhia cov kev taw qhia (feem ntau ntsug rau phab ntsa hlab ntsha).
Tom qab- Kev Tu Tiav: Qhia meej tias tom qab polishing, cov chaw yuav tsum tau muab ntxuav kom tshem tawm cov khoom seem thiab cov khoom sib xyaw ua ke, feem ntau ua raws li passivation.
Kev Tiv Thaiv Kev Tiv Thaiv Hlau: Yuav tsum tau ua kom polishing nrog abrasives thiab cov cuab yeej mob siab rau nickel alloys los tiv thaiv cov hlau tsis huv, uas tuaj yeem pib galvanic corrosion.
Kev Tshawb Fawb: Yuav tsum tau ntsuas qhov roughness ntawm qhov chaw nrog lub profileometer thiab cov ntaub ntawv ntawm cov txiaj ntsig.
Pharmaceutical Standard:
Rau kev siv tshuaj biopharmaceutical, yuav siv tau cov qauv ntxiv, xws li ASME BPE (Bioprocessing Equipment), uas muab cov ncauj lus kom ntxaws txog kev ua tiav, cov ntaub ntawv pov thawj, thiab kev tsim khoom tshwj xeeb rau cov khoom siv hauv kev tsim cov tshuaj biopharmaceuticals.
