Daim ntawv thov teb ntawm A387 Qib 12 Chav Kawm 1 yog dab tsi?
A387 Qib 12 Chav Kawm 1 yog siv rau hauv nruab nrab-kub thiab nruab nrab- qhov chaw siab uas nws tus nqi- kev ua tau zoo piv rau cov pa roj carbon steel lossis siab dua - qib alloys. Nws siv ntau lub niche thiab tau poob rau lub sijhawm, tab sis nws tseem cuam tshuam rau cov kev pabcuam tshwj xeeb, tsawg dua.
Thawj Daim Ntawv Thov Fields:
Fais fab Generation (Pauv & Industrial):
Tsawg mus rau Nruab Nrab-Cov Cheebtsam Boiler: Cov ntu ntawm cov boilers muaj, cov phab ntsa dej, chav nruas (rau qis dua -} qauv tsim), thiab cov khoom siv hluav taws xob ua haujlwm feem ntau qis dua 425℃(800℃F).
Kev Txhim Kho Cov Nroj Tsuag Laus & Retrofits: Zoo li -rau -xws li hloov cov khoom hauv cov cuab yeej hluav taws xob qub qub uas tsim los nrog qib no.
Petrochemical & Tshuaj Ua Haujlwm:
Nruab nrab-Cov Txheej Txheem Kub Kub: Cov kab, cov khoom sib cais, thiab cov reactors nyob rau hauv cov txheej txheem uas kub thiab corrosion nyob rau hauv nws cov kev txwv (xws li, ib co hydrocarbon ua units, ammonia nroj tsuag).
Thaum tshav kub kub Exchanger Shells thiab Channels rau cov kev pab cuam tsis cuam tshuam nrog hnyav hydrogen los yog siab sulfide corrosion.
General Industrial Pressure Vessels:
Cov nkoj rau compressed cua, chav, los yog cov txheej txheem gases qhov kev khiav hauj lwm tej yam kev mob tshaj qhov kev nyab xeeb kub txwv rau carbon steel (ib ASME Boiler thiab Pressure Vessel Code) tab sis tsis tas yuav tsum tau txhim kho cov khoom ntawm Qib 11 los yog 22.
Vim Li Cas Xaiv Qib 12 Chav Kawm 1? Qhov laj thawj:
1.Cov nqi txuag nyiaj ntau dua Alloys: Nws yog qhov qis dua - tus nqi hloov pauv rau Qib 11 (1.25Cr-0.5Mo) thaum qhov kev pabcuam ib puag ncig (kub, siab, corrosion) tau lees paub tias nws muaj peev xwm ntau dua.
2.Performance Upgrade dua Carbon Steel: Nws muab lub zog zoo dua ntawm qhov kub thiab txias thiab txhim kho oxidation tsis kam piv rau carbon steel daim hlau zoo li SA-516, ua rau nws haum rau "siab kub" ntau yam uas tau teev tseg los ntawm cov lej.
3.Fabrication Flexibility (Class 1): Muab nyob rau hauv qhov zoo li qub, nws yog qhov zoo - haum rau fabrications uas muaj feem xyuam rau vuam thiab sib sau, raws li zaum kawg Post- Weld Thaum tshav kub kub kho (PWHT) yuav txhim kho nws cov khoom zoo thiab txo kev ntxhov siab.
Cov kev txwv tseem ceeb & Cov ntsiab lus niaj hnub:
1.Narrower Performance Window:Nws muaj qis dua - qhov kub thiab txias zog, nkag siab, thiab corrosion / oxidation tsis kam tshaj Qib 11 thiab 22. Nws tsis tsim nyog rau kev pabcuam hydrogen ntawm Nelson Curve.
2.Kev siv tsawg tsawg: Hauv kev tsim qauv tshiab, cov kws tsim qauv feem ntau ua rau Qib 11 kom muaj kev nyab xeeb dav dua thiab muaj kev nyab xeeb dua, lossis siv cov pa roj carbon steel nrog kev tiv thaiv corrosion, ua rau Qib 12 tsis tshua muaj "hauv- nruab nrab" xaiv.
3.Driven los ntawm Legacy & Specific Design:Nws daim ntawv thov niaj hnub no feem ntau yog rau kev hloov pauv lossis hauv cov qauv tsim uas nws cov khoom tshwj xeeb tau tsim los ua kom zoo rau qhov paub, tsis yog - lub luag haujlwm hnyav.
Hauv cov ntsiab lus
A387 Qib 12 Chav Kawm 1 pom daim ntawv thov nyob rau hauv qis- rau- nruab nrab qhov hnyav nce siab cov cuab yeej kub siab, feem ntau qhov uas nws cov txiaj ntsig kev lag luam zoo dua cov alloys siab dua yog tsim nyog los ntawm qhov zoo-txhais tau, nruab nrab ntawm kev ua haujlwm, thiab qhov chaw ntawm txoj kev fabrication suav nrog tag nrho PWHT.
1. Dab tsi yog qhov zoo ntawm kev xaiv A387 Qib 12 Chav Kawm 1 tshaj carbon steel rau lub nkoj siab?
Cov lus nug no tsom mus rau kev lag luam thiab kev ua tau zoo rau kev kho dua tshiab ntawm cov hlau, feem ntau yog rau cov kev pabcuam kub nruab nrab uas Qib 12 muaj kev txhim kho lub zog thiab oxidation tsis kam ntawm tus nqi tsim nyog.
2. Vim li cas ib tug engineer yuav qhia Qib 12 es tsis yog qib 11 ntau dua?
Lo lus nug no tshawb txog kev lag luam tawm - tawm ntawm kev ua haujlwm ntawm cov khoom siv thiab cov phiaj xwm kev lag luam, raws li Qib 12 muaj tus nqi -txuag kev xaiv thaum cov kev pab cuam nyob rau hauv nws qhov kev txwv siab dua - kub thiab corrosion kuj muaj peev xwm.
3. Dab tsi yog qhov siab tshaj - qhov ntsuas kub ntawm A387 Qib 12 piv rau Qib 11 yog dab tsi?
Cov lus nug no hais txog cov kev ciam teb ntawm cov hlau, tsom mus rau nws cov ntsiab lus chromium thiab molybdenum uas ua rau txo qis oxidation tsis kam, creep zog, thiab hydrogen nres tsis kam ntawm qhov kub siab.
4. Kev kho cua sov thiab vuam txheej txheem rau Qib 12 Chav Kawm 1 piv rau cov pa roj carbon steel li cas?
Lo lus nug no qhia txog qhov kev cuam tshuam ntawm kev siv cov hlau tsis tshua muaj- alloy steel, sau tseg tias thaum zoo li cov pa roj carbon steel, nws feem ntau yuav tsum nruj dua preheat, tswj kom txias, thiab yuav tsum tau Post-Weld Heat Treatment (PWHT) kom ua tiav cov khoom zoo.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
