1. Cov ntsiab lus ceev
ASTM A335 yog tus qauv tshwj xeeb rauSeamless Ferritic Alloy - Cov Yeeb Nkabnpaj rau high - kev pab kub. Cov "P22" yog hais txog cov qib hlau tshwj xeeb hauv cov qauv no, feem ntau hu ua2.25 chrome - 1 molybdenumHlau.
Hauv cov ntsiab lus yooj yim:ASTM A335 P22 yog ib hom yeeb nkab uas tsis yog los ntawm cov chromium- molybdenum alloy steel, tsim kom muaj kev kub siab thiab muaj cua sov siab ntev.
2. Cov yam ntxwv tseem ceeb & Cov Khoom Siv
Tshuaj Muaj Tshuaj
Cov tshuaj lom neeg muaj pes tsawg leeg yog qhov tseem ceeb ntawm cov qib P22. Nws muab cov corrosion tsis kam thiab lub zog ntawm kev kub siab.
| Lub ntsiab | Muaj pes tsawg leeg (%) |
|---|---|
| Carbon (c) | 0.05 - 0.15 |
| Manganese (mn) | 0.30 - 0.60 |
| Phosphorus (p) | 0.025 max |
| Sulphur (s) | 0.025 max |
| Silicon (si) | 0.50 max |
| Chromium (cr) | 1.90 - 2.60 |
| Molybdenum (mo) | 0.87 - 1.13 |
Chromium (CR):Muab cov oxidation txhim kho (ntsuas) thiab corrosion tsis kam ntawm qhov kub.
Molybdenum (MO):Txhim kho lub zog ntawm kev kub siab thiab txhim kho kev nkag mus rau hauv cov taub (qeeb deformation nyob rau hauv kev ntxhov siab thiab kub).
Cov Khoom Siv Neeg Kho Tshuab
Cov khoom no raug ntsuas ntawm chav tsev kub.
| Ntiag tug | Tus nqi |
|---|---|
| Lub zog tensile | 415 MPa (60 Ksi) min |
| Paib lub zog | 205 MPa (30 Ksi) min |
| Elongation | Sib txawv nrog phab ntsa tuab, tab sis feem ntau ntau dua lossis sib npaug rau 30% |
Siab - kub kev ua tau zoo
Qhov laj thawj tseem ceeb rau kev siv P22 yog nws cov kev ua tau zoo hauv kev nce qib ntsuas kub (feem ntau txog li 593℃/ 1100℃f). Nws muaj qhov zooCrep Lub Zog, txhais tau tias nws tiv taus deforming ntev ntev nyob rau hauv kev ntxhov siab ntau thiab kub.
3. Cov Ntawv Thov Tib Neeg
ASTM A335 P22 Cov kav dej yog siv hauv cov kev pabcuam tseem ceeb uas kub thiab siab tau tam sim no:
Lub hwj huam nroj tsuag:Superheaters, kev tu cev me nyuam, cov kab chav tsev, thiab headers hauv fossil - roj fais fab chaw nres tsheb.
Petrochemical Kev Ua Ntawv Ntxiv:Pipelines hauv cov txheej txheem txheej txheem refinery, xws li catalytic crackers thiab hydrocackers, uas kub heev.
Tub tshib Tube:Rau ob qho kev lag luam thiab dej fais fab.
Cov tshuab hluav taws kub:Hauv cov kev pab cuam uas xav tau los ua hauj lwm rau thermal cycling thiab siab siab.
4. Kev Tsim Kho Cov Txheej Txheem
Raws li atsis ntseYeeb nkab, nws yog tsim khoom tsis muaj welded seam. Tus txheej txheem thawj koom nrog:
Tho:Ib lub zog cylindrical cov hlau billet yog rhuab thiab chob los ntawm mandrel los tsim lub plhaub khoob.
Elongation:Lub Plhaub Hollow yog tom qab ntawd elongated thiab dov kom ua tiav qhov xav tau txoj kab uas xav tau thiab phab ntsa tuab.
Sizing & xov:Cov yeeb nkab ua tiav rau qhov ntev kawg, cua sov -}}} kho, thiab raug rau ntau yam kev ntsuas.
Lub seamless kev tsim kho muab cov qauv qauv ib puag ncig txhua qhov chaw, ua rau nws muaj zog dua thiab txhim khu kev txhim khu kev qha rau cov kav dej siab piv rau welded kav.
5. Kev kho cua sov
A335 P22 kav yogyuav xav tauyuav tsum tau muab rau hauvtag nrho anealed lossis normalized thiab temperedmob. Qhov kev kho cua sov no yog qhov tseem ceeb rau:
Txo sab hauv kev ntxhov siab los ntawm kev tsim khoom.
Ua kom ua kom ua kom ua cov qauv nplej.
Ua tiav qhov kev xav tau ntawm lub zog thiab ductility.
6. Kuaj thiab tshuaj xyuas
Txhawm rau kom muaj kev ncaj ncees thiab kev ncaj ncees, cov kav dej tau raug kuaj nruj, suav nrog:
Hydrostatic kev kuaj:Txhua cov yeeb nkab tau sim rau ib lub siab tsav tsheb tsis muaj kev txwv.
Tsis - Kev Ntsuas Hluav Taws Xob:Feem ntau ib qho kev kuaj mob Eddy tam sim no lossis ultrasonic kuaj kom kuaj xyuas qhov chaw saum npoo thiab cov khoom siv ntawm cov teeb meem.
Zaim hluavtaws, kev sim hardness, khoov xeem:Ua rau cov qauv los ntawm txhua qhov kub ntau.
Tshuaj lom neeg tshuaj thiab lub tensile kev kuaj:Ua kom paub tseeb muaj pes tsawg leeg thiab cov khoom siv neeg kho tshuab.
7. Piv nrog lwm cov qib
ASTM A335 P11 (1.25CO):Cov ntsiab lus tsawg dua thiab Molybdenum cov ntsiab lus tshaj P22, lub ntsiab lus qis dua siab- kub lub zog thiab oxidation tsis kam. Nws tau siv rau kev pabcuam hnyav.
ASTM A335 P91 (9CR {{{}} 1mo-v):Ib qho tshiab dua, kev ua tiav ntau nrog ntau dua lub zog ntawm kev nce siab kub. Tso cai rau cov yeeb nkab thinner phab ntsa ntawm tib lub siab ntaus nqi, tab sis yuav tsum muaj ntau cov txheej txheem vuam.
ASTM A106 Qib B (Carbon Hlau):Siv rau high - kub kev pab tab sis tsis muaj qhov tseem ceeb corrosion tsis kam. Nws yog tus lwm txoj kev xaiv tau pheej yig dua rau cov ntawv thov uas oxidation tsis yog thawj qhov kev txhawj xeeb.
Cov Lus Tseem Ceeb Ntawm Vuam
Vuam P22 siv cov txheej txheem tshwj xeeb, suav nrog preheating (feem ntau} 300 {{}}}}}}} Qhov no yog qhov tseem ceeb los tiv thaiv kev tawg thiab ua kom lub zog weldment muaj cov khoom sib txuam ntawm cov hlau. Vuam pas nrig lossis cov xov hlau nrog cov muaj pes tsawg leeg sib xyaw (piv txwv li, ER90S-B3, E9015-B3) tau siv.
Ntsiab lus xaus
| Yam zoo | Kev piav txog |
|---|---|
| Lub hom phiaj | ASTM A335 (seamless ferritic alloy - steel rau high- kub kev pab) |
| Teem nqi | P22 (sib npaug rau WP22 hauv Astm A335) |
| Lub Npe | 2.25cr-1mo steel |
| Tus yuam sij | Kev siv lub zog zoo tshaj plaws thiab oxidation tsis kam ntawm qhov kub |
| Puab | Seamless Yeeb Nkab |
| Thawj cov ntawv thov | Lub hwj chim nroj tsuag, ua kom zoo dua, high - kub cov hlab ntsha |
Hauv kev xaus,ASTM A335 P22 Seamless Hlau Yeeb Nkabis a workhorse alloy steel pipe chosen for its reliable performance in demanding high-temperature and high-pressure environments. Nws kev sib xyaw ntawm chromium thiab molybdenum ua rau nws ruaj khov thiab ntev-}} kav cov kev xaiv rau cov cuab yeej tseem ceeb.
