Boiler pipes yog cov hlau tshwj xeeb uas tsim los thauj dej, chav dej, thiab siab -kub dej hauv cov boilers, thermal fais fab nroj tsuag, thiab cov txheej txheem cua sov. Tsis zoo li cov kav dej zoo tib yam, cov kav dej boiler yuav tsum tiv taus qhov kub siab, siab sab hauv, thiab ntev - lub sij hawm thermal stress. Lawv txoj kev ntseeg tau ncaj qha cuam tshuam rau kev ua haujlwm ntawm lub cev, lub zog tso zis, thiab kev nyab xeeb ntawm kev ua haujlwm. Vim tias lawv ua haujlwm nyob rau hauv cov kev pabcuam hnyav, cov kav dej boiler yog tsim raws li cov qauv hlau thiab cov tshuab ua haujlwm kom muaj zog txaus, nkag siab, thiab tiv thaiv corrosion.
Lub luag haujlwm ntawm Boiler Pipes
Thaum tshav kub kub hloov thiab chav tsim
Nyob rau hauv lub boiler system, cov kav dej yog lub hauv paus nruab nrab rau kev sib pauv cua sov. Cov dej ntws mus rau hauv cov hlab uas raug rau cov roj combustion, absorbing tshav kub thiab hloov mus rau hauv saturated los yog superheated chav. Economizer tubes preheat feedwater, dej phab ntsa raj tsim lub cub tawg enclosure, thiab superheater tubes nce chav kub rau turbine efficiency. Txhua ntu xav tau cov khoom siv raws li nws qhov kev khiav hauj lwm kub thiab siab ntau yam.
Siab Containment thiab cov qauv kev ntseeg siab
Boiler kav yuav tsum tiv thaiv hoop stress generated los ntawm sab hauv siab. Qhov loj ntawm kev ntxhov siab nyob ntawm cov yeeb nkab txoj kab uas hla, phab ntsa thickness, thiab kev khiav hauj lwm siab. Rau siab - siab boilers, tuab - cov kav dej seamless feem ntau yog siv los muab lub zog zoo sib xws thiab tshem tawm cov vuam seam vulnerabilities. Hauv qis- ntu siab, cov kav dej welded yuav raug siv nrog kev tshuaj xyuas kom zoo thiab kev tswj xyuas kom zoo.
Cov khoom siv hauv Boiler Pipe Manufacturing
Boiler kav feem ntau yog tsim los ntawm carbon steel los yog hlau alloy. Kev xaiv cov khoom nyob ntawm chav kawm kub thiab qhov chaw pabcuam. Carbon steel kav yog tsim rau nruab nrab kub kev pab cuam, thaum chromium-molybdenum alloy steels muab kev txhim kho creep zog thiab oxidation tsis kam ntawm kub dua.
Cov lus hauv qab no qhia txog cov khoom siv sib xws thiab lawv cov kev siv ntau yam.
| Hom khoom | Hom Qib Piv Txwv | Kev Pab Cuam Kub Kub | Daim ntawv thov cheeb tsam |
|---|---|---|---|
| Carbon Steel | ASTM A106 Gr.B | Mus txog 450 degree | Phab ntsa dej, economizer |
| Tsawg-Alloy Steel | 12Cr1MoV | 450-580 degree | Superheater, reheater |
| Chromium{0}}Molybdenum Steel | ASTM A335 P22 | 500-600 degree | Siab - ntu siab |
| High Alloy hlau | ASTM A213 T91 | Tshaj 600 degree | Ultra-supercritical boilers |
Cov khoom muaj pes tsawg leeg yog tswj hwm nruj me ntsis kom ntseeg tau tias lub zog muaj zog, ductility, thiab ntev -lub sij hawm nkag mus. Cov khoom siv tshuaj xws li chromium txhim kho oxidation tsis kam, thaum molybdenum txhim kho siab - qhov kub thiab txias.
Kev tsim cov txheej txheem ntawm Boiler Pipes
Seamless yeeb nkab ntau lawm
Seamless boiler kav feem ntau yog tsim los ntawm kub dov los yog extrusion txheej txheem. Ib qho khoom siv steel hlau yog thawj zaug rhuab mus rau qhov kub thiab txias los tsim lub plhaub hollow. Lub plhaub yog ces elongated thiab dov mus cuag lub siab xav tau txoj kab uas hla thiab phab ntsa thickness. Kub dov refines grain qauv thiab txhim kho txhua yam khoom. Tom qab sib sau, cov kav dej tau txais qhov loj me, ncaj, thiab txiav mus rau qhov ntev.
Seamless manufacturing tshem tawm longitudinal weld seams, uas txo qhov kev pheej hmoo ntawm weld - cuam tshuam qhov tsis xws luag. Txoj kev no yog qhov zoo dua rau siab -siab thiab siab- cov ntawv thov kub uas qhov kev ncaj ncees yog qhov tseem ceeb.
Welded yeeb nkab ntau lawm
Welded boiler kav yog tsim los ntawm steel sawb los yog phaj tsim rau hauv ib tug cylindrical zoo thiab koom nrog hluav taws xob kuj welding los yog submerged arc vuam. Thaum cov kav dej welded feem ntau pheej yig dua thiab tsim nyog rau kev pab cuam qis dua, nruj tsis yog -kev ntsuas kev puas tsuaj yuav tsum tau ua kom ntseeg tau qhov zoo ntawm vuam. Tom qab-weld kev kho cua sov tuaj yeem siv los txo cov kev ntxhov siab uas seem thiab kho cov khoom siv kho tshuab.
Kev kho cua sov thiab ua kom tiav
Tom qab tsim, cov kav dej boiler tau txais cov txheej txheem kho cua sov xws li normalizing, quenching, lossis tempering nyob ntawm cov khoom siv qib. Kev kho cua sov refines lub microstructure, txhim khu lub zog tensile, thiab txhim kho toughness. Rau cov hlau alloy, kev tswj xyuas qhov kub thiab txias thaum kho cua sov yog qhov tseem ceeb kom ua tiav qhov kev xav tau nkag.
Cov txheej txheem saum npoo av muaj xws li pickling, tua blasting, thiab daim ntawv thov txheej. Cov kev kho no tshem tawm cov nplai, txhim kho qhov huv si, thiab muab kev tiv thaiv corrosion thaum khaws cia thiab kev thauj mus los.
Cov lus hauv qab no qhia txog cov theem tsim khoom loj thiab lawv lub hom phiaj kev lag luam.
| Kev tsim khoom theem | Lub Hom Phiaj | Kev Tswj Xyuas Zoo |
|---|---|---|
| Billet Cua sov thiab Piercing | Form hollow qauv | Kev ntsuas kub |
| Rolling los yog forming | Ua kom tiav qhov loj me | Dimensional soj ntsuam |
| Vuam (yog muaj) | Koom nrog cov npoo steel | Radiographic los yog ultrasonic kuaj |
| Kev kho cua sov | Txhim kho microstructure | Hardness thiab tensile xeem |
| Nto Finishing | Txhim kho corrosion kuj | Visual thiab txheej tshuaj xyuas |
Cov Qauv Zoo thiab Kev Xeem
Cov kav dej boiler yuav tsum ua raws li kev lees paub thoob ntiaj teb cov qauv xws li ASTM, ASME, lossis EN specifications. Cov txheej txheem kuaj muaj xws li kev ntsuam xyuas hydrostatic siab los xyuas qhov tsis kam tiv thaiv, kev ntsuas tensile kom paub meej tias lub zog ntawm lub zog, thiab kev ntsuam xyuas cuam tshuam los xyuas kom muaj zog nyob rau hauv dynamic load. Kev ntsuam xyuas ultrasonic feem ntau yog siv los txheeb xyuas cov teeb meem sab hauv, thaum eddy tam sim no ntsuas ntsuas qhov tsis xws luag.
Dimensional kam rau ua yog nruj tswj hwm vim hais tias phab ntsa thickness variation ncaj qha cuam tshuam rau tso cai rau kev nyuaj siab xam. Kev tshuaj xyuas cov tshuaj muaj pes tsawg leeg ua kom ua raws li cov kev xav tau ntawm alloy. Tsuas yog cov kav dej uas dhau qhov kev tshuaj ntsuam xyuas tau pom zoo rau siab - kev pabcuam siab.
Application Diversity
Cov kav dej boiler tsis txwv rau cov chaw tsim hluav taws xob. Lawv tau siv dav hauv petrochemical refining, pulp thiab ntawv tsim, tshuaj ua haujlwm, thiab hauv cheeb tsam cua sov. Txhua qhov kev lag luam xav tau cov yam ntxwv ua haujlwm tshwj xeeb, los ntawm kev tiv thaiv corrosion hauv cov nroj tsuag tshuaj mus rau siab creep zog hauv thermal zog tsim.
Nyob rau hauv niaj hnub ultra-supercritical fais fab nroj tsuag, kev khiav hauj lwm kub thiab siab tshaj li ib txwm tsim txwv, yuav tsum tau advanced alloy steel kav nrog superior siab - kub zog. Kev txhim kho txuas ntxiv hauv cov hlau metallurgy thiab kev tsim khoom siv thev naus laus zis txhawb kev ua haujlwm siab dua thiab txo qis emissions.
Xaus
Boiler kav dej yog cov khoom tseem ceeb uas tau tsim los tswj cov huab cua kub thiab siab nyob rau hauv lub tshuab tsim hluav taws xob. Lawv tsim thiab ntau lawm suav nrog kev xaiv cov khoom siv meej, cov txheej txheem tsim cov txheej txheem, kev kho cua sov, thiab kev tswj xyuas nruj. Cov kav dej seamless yeej muaj siab - cov ntawv thov siab vim lawv qhov kev ntseeg tau ntawm cov qauv, thaum cov kav dej welded muab tus nqi - cov kev daws teeb meem zoo rau qis dua - ntu siab. Los ntawm kev nruam nruam nyob rau hauv metallurgy thiab kev tsim cov txheej txheem, boiler yeeb nkab tshuab txuas ntxiv mus rau evolve, ua kom muaj kev nyab xeeb dua thiab muaj txiaj ntsig kev lag luam.
