Yog vim li cas Thaum tshav kub kub Resistant Seamless Tubes xav tau
Kev kub siab boiler raj muaj rau tsev neeg seamless raj, tab sis lawv raug txiav txim nrog ntau nruj cov kev xav tau ntawm cov hlau nws tus kheej dua li cov yeeb nkab seamless zoo tib yam. Hauv kev pabcuam lawv raug nthuav tawm ib txhij rau kev siab sab hauv, siab hlau kub, oxidising flue gas thiab dej vapor. Nyob rau hauv cov xwm txheej no lub raj tuaj yeem poob ntu los ntawm oxidation thiab corrosion nyob rau sab nraud, nplai thiab overheat rau sab hauv, thiab nkag mus rau hauv siab, yog li cov khoom siv yuav tsum sib xyaw ua ke ntev zog, oxidation tsis kam, corrosion kuj thiab cov qauv ruaj khov.
Cov raj siv los tsim cov raj superheater, cov raj reheater, cov raj cua qhia, cov raj tseem ceeb thiab cov khoom siv hluav taws xob sib txuas rau kev kub siab thiab ultra- kub siab boilers, nrog rau cov txheej txheem kub exchangers nyob rau hauv refining, petrochemical, tshuaj thiab pov tseg thaum tshav kub kub kev pab cuam.
Qib rau Kev Kub Ntxhov Siab thiab Kev Pabcuam Siab
Cov tsev neeg austenitic stainless muab qhov kev xaiv dav tshaj plaws. Cov qib txheem muaj xws li 304, 304L, 304H, 304LN, 316L, 316H, 316Ti, 317, 317L, 321 thiab 321H; cov qib stabilized 321H thiab 347H yog siv qhov twg lub raj yuav ua hauj lwm nyob rau hauv lub sensitizing ntau yam rau lub sij hawm ntev; thiab qib siab chromium 309S thiab 310S raug xaiv qhov twg oxidation tsis kam ntawm cov hlau kub siab tshaj plaws yog qhov yuav tsum tau ua. Duplex qib S31803 yog xaiv qhov twg muaj zog dua thiab zoo dua cov tshuaj chloride kev nyuaj siab corrosion dua li cov qauv austenitic xav tau, thiab 904L ntawm UNS N08904 chav kawm yog siv rau cov txheej txheem corrosive hnyav.
Cov tsev neeg ferritic thiab martensitic npog 409, 409L, 410, 430, 436, 436L, 439, 439L thiab 444. Cov qib no yog siv qhov thermal expansion yuav tsum tau khaws cia qis, piv txwv li hauv qee qhov kev sib hloov cua sov thiab kev pab cuam tso pa, thiab qhov chaw muaj kev tiv thaiv corrosion txaus txaus.
| Tsev neeg | Cov qib sawv cev | Qhov laj thawj rau kev xaiv |
|---|---|---|
| Austenitic | 304H, 316H, 321H, 347H | Creep zog thiab cov qauv stability ntawm elevated hlau kub |
| Siab chromium austenitic | 309S, 310S | Oxidation tsis kam ntawm cov hlau kub siab tshaj plaws |
| Duplex | S31803 | Lub zog siab dua nrog kev txhim kho chloride kev nyuaj siab corrosion kuj |
| Ferritic thiab martensitic | 409, 430, 436, 439, 444, 410 | Tsawg thermal expansion thiab nruab nrab corrosion kuj |
Cov qauv rau Seamless thiab Welded Supply
Seamless heat resistant raj feem ntau muab rau GB 13296, GB / T 14976 thiab GB / T 14975, rau ASTM thiab ASME A213, A312, A269, A789 thiab A790, thiab rau EN 10216-5 thiab DIN 17458 tube muab rau tib lub luag haujlwm. 12770 thiab GB / T 12771, rau ASTM thiab ASME A249, A312, A554, A778 thiab A789, thiab rau EN 10217-7 thiab DIN 17457.
Tus qauv xaiv txiav txim seb qhov kev xeem twg yuav tsum tau ua. Specifications rau boiler thiab tshav kub exchanger tubing ib txwm yuav tsum tau tshuaj ntsuam xyuas, tensile xeem, hardness kuaj, flattening thiab flaring xeem, ib tug hydrostatic los yog pneumatic xeem, thiab ib tug eddy tam sim no los yog ib tug ultrasonic kuaj ntawm tag nrho ntev, nrog ib tug grain loj thiab intergranular corrosion xyuas rau cov qib stabilized austenitic.
Daim ntawv thov
Superheater thiab reheater tubing hauv kev siv hluav taws xob thiab kev lag luam boilers.
Cov raj cua qhia, cov raj tseem ceeb thiab cov kab kub reheat nyob rau hauv kev kub siab thiab ultra-siab siab units.
Thaum tshav kub kub exchanger raj thiab U- khoov pob hauv refining, petrochemical thiab tshuaj nroj tsuag.
Rauv thiab kiln internals, radiant tubes thiab kub txheej txheem piping.
Khib thaum tshav kub kub rov qab, incineration thiab tso pa system uas oxidation kuj tseem ceeb heev.
Kev Taw Qhia Kev Xaiv thiab Kev Ua Haujlwm
Kev xaiv pib los ntawm kev tsim cov hlau kub, cov roj flue lossis cov txheej txheem cua thiab corrosivity ntawm cov kwj deg. Hauv tsev neeg austenitic, xaiv cov qib qis tshaj plaws uas ua tau raws li qhov yuav tsum tau muaj kev nkag siab thiab oxidation, vim tias kev txav mus rau qib siab chromium lossis qib nickel ntau dua ua rau tus nqi thiab kev sib txuas rhiab heev. Qhov twg lub raj yuav raug rhiab heev hauv kev pabcuam, qhia cov qib ruaj khov xws li 321H lossis 347H, lossis qib qis carbon xws li 304L lossis 316L.
Rau fabrication, stainless tube yuav tsum huv si txiav thiab npaj, tsis tshua muaj cua sov input vuam, tswj interpass kub thiab, rau lub stabilized thiab duplex qib, nruj me ntsis saib xyuas rau consumable xaiv thiab mus rau lub tshav kub input ntau yam, vim hais tias kub input ntau dhau ua rau lub duplex theem tshuav nyiaj li cas. Kev daws annealing tom qab mob khaub thuas txias heev rov ua kom muaj kev tiv thaiv corrosion, thiab kev kho mob pickling thiab passivation tshem tawm cov oxide uas tsim rau ntawm thaj chaw tshav kub.
FAQ
Q: Dab tsi yog qhov txawv ntawm lub boiler raj thiab ib tug zoo tib yam seamless raj?
Txoj kev tsim khoom zoo ib yam, tab sis lub raj boiler tau txiav txim siab rau qhov kev qhia tshwj xeeb uas tswj cov hom steel ntau nruj dua thiab ua rau cov kev ntsuam xyuas ntxiv xws li cov khoom kub siab, flattening, flaring, grain loj thiab tsis yog - kuaj xyuas.
Q: Qib twg yog siv qhov twg oxidation tsis kam ntawm qhov kub siab tshaj plaws?
Lub siab chromium austenitic qib 309S thiab 310S raug xaiv rau lub siab tshaj plaws hlau ua hauj lwm kub, vim hais tias lawv cov ntsiab lus chromium muab qhov zoo tshaj plaws scale kuj nyob rau hauv oxidising atmospheres.
Q: Thaum twg yuav tsum tau qhia qib ruaj khov xws li 321H lossis 347H?
Thaum lub raj yuav nyob twj ywm nyob rau hauv qhov kub thiab txias ntau rau lub sij hawm ntev thaum lub sij hawm kev pab cuam, los yog thaum lub welded sib koom yuav raug mus rau ib tug corrosive ib puag ncig ntawm elevated kub.
Q: Dab tsi yog cov qauv sib npaug rau seamless mov?
Cov ntsiab lus tsis sib xws yog GB 13296, GB / T 14976, GB / T 14975, ASTM A213, A312, A269, A789 thiab A790, EN 10216-5 thiab DIN 17458.
Q: Cov ntawv xeem twg yuav tsum muaj daim ntawv pov thawj zeb npog?
Tshuaj ntsuam xyuas, tensile thiab hardness tshwm sim, flattening thiab flaring tshwm sim, ib tug kev ntsuam xyuas siab, thiab ib tug tag nrho ntev eddy tam sim no los yog kuaj ultrasonic, ntxiv grain loj thiab intergranular corrosion tshwm sim nyob rau hauv cov qib yog stabilized.
Q: Vim li cas cov hluav taws xob hluav taws xob tswj tau thaum vuam duplex raj?
Duplex stainless hlau nyob ntawm qhov sib npaug austenite thiab ferrite microstructure. Kev kub siab dhau los lossis qeeb qeeb ntawm qhov txias txias ua rau qhov sib npaug thiab txo ob qho tib si toughness thiab corrosion kuj nyob rau hauv qhov sib koom ua ke.
