Valve pob khoom xaiv yog ib qho kev txiav txim siab tseem ceeb tshaj plaws hauv kev tsim thiab kev yuav khoom. Cov khoom siv ncaj qha cuam tshuam rau kev tiv thaiv corrosion, hnav cov khoom, sealing kev ua tau zoo, thiab tag nrho cov kev pab cuam lub neej. Kev xaiv cov khoom tsis raug tuaj yeem ua rau ua tsis tiav ntxov, kev poob qis, thiab kev pheej hmoo ntawm kev nyab xeeb.
Phau ntawv qhia no muab txoj hauv kev rau kev xaiv cov khoom siv pob valve rau ntau yam kev siv hauv kev lag luam. Nws npog cov ntsiab lus tseem ceeb uas cuam tshuam rau kev xaiv cov khoom, sib piv cov khoom siv, thiab muab cov lus pom zoo rau kev ua haujlwm sib txawv.
Cov ntsiab lus
Cov ntsiab lus tseem ceeb rau kev xaiv cov khoom siv
Ntau yam cuam tshuam yuav tsum tau txiav txim siab thaum xaiv cov khoom siv pob valve. Txhua yam cuam tshuam rau cov khoom siv ua haujlwm thiab tsim nyog rau daim ntawv thov.
Kua Media
Cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov kua dej ua haujlwm yog qhov tseem ceeb tshaj plaws. Cov ntaub ntawv yuav tsum tiv thaiv corrosion los ntawm cov kua dej nws tus kheej, nrog rau tej yam kab mob los yog impurities. Kev txiav txim siab feem ntau suav nrog acids, bases, ntsev, hydrocarbons, thiab oxidizing agents.
Ua haujlwm kub
Kub muaj feem xyuam rau cov khoom siv xws li lub zog, ductility, thiab corrosion kuj. Cov kub kub tuaj yeem ua kom muaj zog corrosion thiab txo cov khoom hardness, thaum qhov kub thiab txias tuaj yeem ua rau embrittlement.
Kev ntsuas siab
Kev kub siab dua xav tau cov khoom siv nrog lub zog ntau dua thiab ua haujlwm rau deformation. Cov khoom siv yuav tsum tuav nws cov qauv kev ncaj ncees nyob rau hauv lub siab tshaj plaws kev khiav hauj lwm siab.
Hnav thiab Abrasion
Cov ntawv thov uas muaj cov khoom me me, slurries, lossis siab - nrawm nrawm xav tau cov khoom siv nrog kev hnav zoo heev. Kev kho saum npoo kuj tseem yuav tsim nyog los txuas ntxiv lub neej kev pabcuam.
Sealing Requirements
Cov ntaub ntawv saum npoo tiav thiab kev sib raug zoo nrog cov ntaub ntawv hauv lub rooj cuam tshuam rau kev sib khi. Mos- rooj zaum li qub feem ntau xav tau qhov chaw smoother, thaum hlau - rooj li qub xav tau cov ntaub ntawv uas tuaj yeem tiv taus qhov kub thiab txias.
Standards thiab Certifications
Cov qauv kev lag luam xws li NACE MR0175 rau kev pabcuam qaub lossis ASME BPVC rau cov cuab yeej siv siab tuaj yeem txiav txim siab cov khoom siv.
Common Valve Pob Khoom
Kev nkag siab txog cov khoom ntawm cov khoom siv pob valve pab hauv kev txiav txim siab xaiv kev paub.
| Khoom siv | Corrosion Resistance | Qhov kub thiab txias | Qhov Zoo Tshaj Plaws | Kev txwv |
|---|---|---|---|---|
| 304 Stainless hlau | Zoo | -200℃rau 870 degree | Tus nqi -zoo, zoo dav dav corrosion kuj | Txwv nyob rau hauv ib puag ncig chloride |
| 316 Stainless hlau | Zoo dua | -200℃rau 870 degree | Txhim kho chloride tsis kam nrog molybdenum | Tsis haum rau cov xov xwm corrosive heev |
| TIAB SA 2205 | Zoo heev | -50℃rau 315 degree | Siab zog, zoo corrosion kuj | Tsawg kub txwv |
| Super Duplex 2507 | Zoo heev | -50℃rau 315 degree | Kev tiv thaiv corrosion siab tshaj hauv tsev neeg duplex | Tus nqi siab dua, nyuaj rau tshuab |
| Ib 625 | Zoo heev | -200℃rau 1090 degree | Siab - kub lub zog, oxidation kuj | Tus nqi siab |
| Monel 400 | Zoo heev | -100℃rau 480 degree | Cov dej hiav txwv zoo thiab acid tsis kam | Txwv siab -kev ua haujlwm kub |
| Hastelloy C276 | Zoo heev | -200℃rau 1090 degree | Resistant tshuaj feem ntau suav nrog cov acids muaj zog | Tus nqi siab heev |
Daim ntawv thov -Cov lus qhia tshwj xeeb
Cov kev lag luam sib txawv muaj cov kev cai tshwj xeeb uas qhia kev xaiv cov khoom siv.
Roj & Roj Kev Lag Luam
Kev siv roj thiab roj xav tau cov ntaub ntawv uas tuaj yeem tiv taus qhov hnyav ib puag ncig xws li roj qaub (H2S), kev kub ntxhov siab, thiab tshuaj lom neeg hnyav.
- Standard Service:316 Stainless Hlau los yog Duplex 2205
- Kev Pab Cuam:NACE MR0175-ua raws cov ntaub ntawv xws li Duplex 2205 lossis Inconel
- Offshore / Subsea:Super Duplex 2507 rau seawater corrosion kuj
- Siab -Tsub:Inconel 625 rau kub tshaj 500 degree
Kev Lag Luam Kev Lag Luam
Cov nroj tsuag tshuaj siv ntau yam corrosive kua, xav tau cov ntaub ntawv uas muaj tshuaj tiv thaiv zoo heev.
- Acids (Sulfuric, Hydrochloric):Hastelloy C276 los yog Monel 400
- Chlorine / Chlorides:316 Stainless Hlau lossis Super Duplex 2507
- Organic Chemical:316 Stainless hlau los yog Inconel 625
- High -Purity Applications:Electropolished 316L Stainless hlau
Kev lag luam dej & dej khib nyiab
Cov dej hauv nroog thiab kev lag luam yuav tsum tau them nqi - cov ntaub ntawv zoo nrog corrosion kuj zoo.
- Cov dej haus:304 lossis 316 Stainless Hlau
- Cov dej khib nyiab:316 Stainless Hlau los yog Duplex 2205
- Dej hiav txwv:Super Duplex 2507 lossis Monel 400
- Desalination:Super Duplex 2507 rau siab chloride ib puag ncig
Kev lag luam tsim hluav taws xob
Cov chaw tsim hluav taws xob, suav nrog thermal, nuclear, thiab cov chaw tsim hluav taws xob tauj dua tshiab, xav tau cov khoom siv uas tuaj yeem tiv taus qhov kub thiab txias.
- Siab -Tub kub:Inconel 625 los yog Hastelloy
- Condensate Systems:316 Stainless hlau
- Flue Gas Desulfurization:Duplex 2205 los yog Hastelloy C276
- Nuclear Service:Cov alloys tshwj xeeb ua tau raws li cov qauv ntawm nuclear
Marine & Shipbuilding Kev Lag Luam
Cov ntawv thov dej hiav txwv ntsib qhov raug dej hiav txwv tsis tu ncua, tshuaj tsuag ntsev, thiab ib puag ncig hnyav.
- Seawater tuav:Monel 400 lossis Super Duplex 2507
- Ballast Systems:TIAB SA 2205
- Cooling Systems:316 Stainless hlau nrog ENP txheej
Txheej txheem xaiv khoom
Ib txoj hauv kev ua kom ntseeg tau tias cov khoom raug xaiv raug xaiv rau txhua daim ntawv thov.
Kauj Ruam 1: Txheeb xyuas cov xwm txheej ua haujlwm
Sau cov ncauj lus kom ntxaws txog daim ntawv thov, suav nrog cov kua dej muaj pes tsawg leeg, qhov kub thiab txias, ntsuas ntsuas, cov yam ntxwv ntws, thiab ib puag ncig.
Kauj Ruam 2: Txheeb xyuas cov ntaub ntawv xav tau
Raws li kev ua haujlwm, txiav txim siab txog cov khoom siv uas yuav tsum tau muaj: kev tiv thaiv corrosion, kub muaj peev xwm, lub zog, hnav tsis kam, thiab cov qauv kev lag luam uas yuav tsum tau ua.
Kauj Ruam 3: Ntsuas cov ntaub ntawv tus neeg sib tw
Sib piv cov khoom muaj peev xwm tiv thaiv cov kev xav tau. Xav txog ob qho tib si kev ua haujlwm thiab tus nqi. Tsim cov npe luv ntawm 2-3 cov ntaub ntawv uas ua tau raws li cov txheej txheem tseem ceeb.
Kauj Ruam 4: Xav txog Kev Kho Nto
Txawm tias muaj cov khoom siv zoo, kev kho saum npoo tuaj yeem txhim kho kev ua tau zoo. Cov kev xaiv uas muaj xws li:
- Electroless Nickel Plating (ENP):Txhim kho corrosion thiab hnav tsis kam
- Hard Chrome Plating:Txhim khu kev hnav tsis kam rau kev siv abrasive
- Tungsten Carbide Txheej:Maximum hnav tsis kam rau kev pabcuam hnyav
- Passivation:Txhim kho corrosion kuj ntawm stainless hlau
Kauj Ruam 5: Txheeb xyuas tus neeg muab khoom muaj peev xwm
Xyuas kom cov khoom xaiv tuaj yeem tsim tau raws li qhov xav tau tshwj xeeb. Txheeb xyuas tus neeg muag khoom qhov kev paub nrog cov khoom siv thiab lawv cov txheej txheem tswj kom zoo.
Xaus
Valve pob khoom xaiv yuav tsum tau ua tib zoo xav txog ntau yam, suav nrog cov khoom siv dej, kev ua haujlwm, thiab kev ua haujlwm. Los ntawm kev ua raws cov txheej txheem xaiv thiab nkag siab txog cov khoom sib txawv ntawm cov khoom sib txawv, cov kws tsim khoom thiab pab pawg yuav tuaj yeem xaiv cov khoom siv uas ua kom zoo dua qhov kev ua tau zoo, kev ntseeg siab, thiab tus nqi -kev ua tau zoo.
Thaum muaj kev tsis ntseeg, kev sab laj nrog cov kws paub txog cov khoom siv los yog cov tuam txhab valve tuaj yeem muab cov kev pom muaj txiaj ntsig thiab pab kom tsis txhob raug nqi ntau.
Xav tau kev pab tswv yim rau koj li Valve Ball Project?
Txhua daim ntawv thov muaj cov kev xav tau sib txawv rau kev xaiv cov khoom, kev ntsuas siab, sealing kev ua tau zoo, machining raug thiab kho qhov chaw.
Yog tias koj tab tom ntsuas qhov project tshiab lossis sib piv cov kev xaiv tsim khoom, sib tham txog koj cov kev xav tau nrog ib pab neeg ua haujlwm paub txog tuaj yeem pab txo qis kev pheej hmoo tsim khoom thiab txhim kho cov khoom ntseeg tau ua ntej pib tsim khoom.
Tham txog koj qhov projectCov lus nug nquag
Kuv puas tuaj yeem siv 304 stainless hlau rau kev siv dej hiav txwv?
304 stainless hlau tsis pom zoo rau cov ntawv thov dej hiav txwv vim nws qhov cuam tshuam rau chloride-induced pitting corrosion. Rau cov dej hiav txwv, xav txog 316 stainless hlau, Duplex 2205, Super Duplex 2507, los yog Monel 400, uas muaj kev tiv thaiv corrosion zoo dua hauv chloride ib puag ncig.
Cov ntaub ntawv twg yog qhov zoo tshaj plaws rau kev siv siab -kub?
Inconel 625 thiab Hastelloy C276 yog cov kev xaiv zoo tshaj plaws rau siab -kev siv kub. Lawv tuav lawv lub zog thiab kev tiv thaiv corrosion ntawm qhov kub txog li 1090 degree, ua rau lawv tsim nyog rau kev tsim hluav taws xob thiab siab -cov txheej txheem kub.
Kev kho saum npoo cuam tshuam li cas rau kev xaiv khoom?
Kev kho deg tuaj yeem txuas ntxiv lub neej kev pabcuam ntawm cov pob valve los ntawm kev txhim kho corrosion thiab hnav cov khoom. Piv txwv li, ENP txheej ntawm stainless hlau tuaj yeem txhim kho nws cov kev ua tau zoo nyob rau hauv ib puag ncig corrosive me me, tso cai rau siv cov khoom siv qis dua. Txawm li cas los xij, rau cov khoom siv hluav taws xob zoo heev lossis siab -kub siv, cov khoom siv hauv paus nws tus kheej yuav tsum yog corrosion- tiv taus.
Dab tsi yog qhov txawv ntawm 316 thiab 316L stainless hlau?
Qhov sib txawv tseem ceeb yog cov ntsiab lus carbon . 316L muaj cov ntsiab lus qis dua (max 0.03%) piv rau 316 (max 0.08%). Cov ntsiab lus qis dua no txo qhov kev pheej hmoo ntawm kev hnov mob thaum vuam, ua rau 316L nyiam rau cov ntawv thov welded thiab siab - purity ib puag ncig uas intergranular corrosion yuav muaj kev txhawj xeeb.
Puas yog Duplex stainless hlau zoo dua li cov hlau tsis huv?
Duplex stainless hlau muaj zog dua thiab zoo corrosion kuj dua li austenitic stainless hlau (304, 316) nyob rau hauv ntau qhov chaw, tshwj xeeb tshaj yog nyob rau hauv cov tshuaj chloride - muaj cov xov xwm. Txawm li cas los xij, lawv muaj qhov ntsuas kub qis dua thiab nyuaj rau tshuab, uas tuaj yeem cuam tshuam tus nqi thiab kev tsim khoom nyuaj. Qhov kev xaiv nyob ntawm qhov kev thov tshwj xeeb.
