Hauv kev teeb tsa kev lag luam-xws li cov chaw tsim hluav taws xob, chaw ua haujlwm petrochemical, lossis siab - thaj chaw txheej txheem kub-S335J2W Corten Steel tuaj yeem ntsib lub sijhawm ntev - qhov kub thiab txias los yog hluav taws kub ceev. Lub thickness ntawm cov hlau ncaj qha txiav txim siab ntev npaum li cas nws tuaj yeem khaws cov qauv kev ncaj ncees thiab kev ua haujlwm raws li cov xwm txheej hnyav, uas yog qhov tseem ceeb rau kev nyab xeeb ntawm qhov project. Txawm li cas los xij, cov neeg yuav khoom feem ntau tawm tsam los nrhiav cov lus qhia tseem ceeb: S335J2W tsis yog qib qauv hauv EN 10025-5, tus qauv tseem ceeb nyob sab Europe rau huab cua- cov hlau tsis muaj zog. Yog li, qhov tuab npaum li cas cuam tshuam nws qhov hluav taws kub thiab siab -kub kev ua haujlwm? Cov ntsiab lus xaus, muab los ntawm EN 10025-5 qhov kev ua tau zoo ntawm cov hlau zoo sib xws, yog qhov tseeb:Thickness zoo txhim kho ob lub zog los ntawm kev hloov pauv kom sov, tab sis kev txhim kho toj siab siab tshaj 25 hli; nyias- cov ntawv ntsuas (tsawg dua lossis sib npaug li 10mm) yog qhov ua rau muaj kev puas tsuaj sai. Hauv qab no yog cov ntsiab lus, pov thawj -raws li kev tawg.
Lub ntsiab lus tseem ceeb: Kev nthuav qhia ntawm S335J2W's Qib Xwm
Ua ntej txheeb xyuas qhov cuam tshuam thickness, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov: S335J2W tsis tau teev nyob rau hauv EN 10025-5. Raws li nws lub npe convention (nrog "J2" implying -20℃qis-kub toughness thiab "W" denoting huab cua tsis kam), nws yog inferred raws li ib tug nruab nrab- huab cua tsis muaj zog- resistant steel (yield zog ntawm 235-355MPa). Peb qhov kev soj ntsuam hauv qab no yog hais txog EN 10025-5 cov lus qhia rau cov qib zoo sib xws (xws li, S355J2W) thiab universal high-temperature kev ua tau zoo ntawm cov qauv hlau-ua kom ntseeg tau qhov tseeb thiab qhov tseeb.
1. Kev cuam tshuam rau siab -Kev Ua Haujlwm Kub: Thickness Boosts Thermal Stability
High -kub qhov kev ua haujlwm ntawm no yog hais txog lub peev xwm khaws cov khoom siv kho tshuab (lub zog, ductility) ntawm 200-600℃(ib txwm muaj qhov kub thiab txias). Thickness exerts nws cov nyhuv feem ntau los ntawmthermal inertia(tsis kam mus rau kub nce):
Kev tuav ruaj khov: Thicker S335J2W ua cua sov qeeb dua. Ntawm 500℃(ib qho kev lag luam siab kub), 15mm- daim ntawv tuab khaws cia ~ 45% ntawm nws chav- qhov kub thiab txias, thaum lub 6 hli - daim ntawv nyias tsuas khaws tau ~ 30%. Lub zog qis dua qhov kub nce qeeb qeeb lub zog poob, ua kom muaj peev xwm thauj khoom- ntev dua.
Thermal Deformation Resistance: Nyias-gauge S335J2W (tsawg dua lossis sib npaug li 10mm) muaj cov qauv nruj, ua rau nws yooj yim rau warping lossis tawg nyob rau hauv qhov kub thiab txias vim tsis sib xws thermal expansion. Cov ntawv tuab dua (Ntau dua lossis sib npaug li 12 hli) zoo dua tiv thaiv kev ntxhov siab los ntawm qhov kub thiab txias, tswj qhov ruaj khov nyob rau hauv ntev - lub sij hawm siab - qhov kub thiab txias (piv txwv li, nyob ze ntawm qhov cub lossis boiler peripherals).
Lus Cim Tseem Ceeb: Txawm hais tias qhov tuab, S335J2W lub zog poob qis dua 550℃(ib qho kev sib txawv ntawm qhov qis / nruab nrab- lub zog steels). Thickness txo qhov kev poob qis no tab sis tsis tuaj yeem thim rov qab.
2. Kev cuam tshuam rau hluav taws kub: Thickness Extends Fire Endurance Time
Kev tiv thaiv hluav taws yog ntsuas los ntawmhluav taws kub endurance lub sij hawm- lub sijhawm cov hlau tuav cov khoom thauj -cov kabmob muaj peev xwm raws li tus qauv hluav taws kub (raws li EN 13381 lossis ASTM E119). Rau S335J2W, thickness yog qhov txiav txim siab:
Txoj Cai Tseem Ceeb: Thicker=Ntev Ntev: Cov ntaub ntawv siv tau (siv los ntawm EN 10025-5 qib zoo sib xws) qhia: 8mm-Tick S335J2W muaj qhov hluav taws kub ntawm ~ 15 feeb; 15mm{11}}tuab=~ 35 feeb; 20mm{15}}tuab=~ 50 feeb. Cov ntoo khaub lig thicker-section yuav tsum tau siv sij hawm ntau dua rau hluav taws kub kom nkag mus rau hauv lub hauv paus, ncua qhov poob ntawm cov khoom muaj peev xwm.
Plateau Effect: Thaum thickness ntau tshaj 25 hli, qhov nce ntawm hluav taws kub endurance ua negligible. Ib daim ntawv tuab 25mm -cov ntawv tuab muaj qhov hluav taws kub ntawm ~ 55 feeb, thaum 30mm- ntawv tuab tsuas yog txuas mus rau ~ 60 feeb. Ntxiv rau qhov no, cov khoom tuab muaj cov txiaj ntsig ntxiv me ntsis tab sis nce nqi ntau.
Tswv yim xaiv cov lus pom zoo los ntawm Thickness
Txhawm rau sib npaug ntawm kev ua tau zoo thiab tus nqi, ntawm no yog lub hom phiaj xaiv cov lus qhia thickness raws li daim ntawv thov scenarios:
Tsawg-Tsuas Kub Tshaj Tawm (200-300 degree): Rau cov khoom uas tsis yog-load-cov kabmob (xws li, cov khoom siv kho kom zoo nkauj nyob ze rau siab- cov khoom siv kub), 6-10mm S335J2W txaus. Rau lub teeb-load txhawb nqa (piv txwv li, me platforms), xaiv 12-15mm los xyuas kom meej lub zog tuav.
Hluav taws kub- Ib puag ncig yooj yim: Yog tias cov lej hauv zos xav tau 30+ feeb ntawm kev tiv thaiv hluav taws (xws li, kev ua haujlwm rhiav kev lag luam-cov kab hluav taws xob), xaiv 15-20mm S335J2W. Rau 50+ feeb ntawm kev ua siab ntev, tsis txhob cia siab rau qhov tuab nkaus xwb-pair nrog cov hluav taws kub nyhiab- cov coatings resistant (dry film thickness 1.0-2.0mm), uas yog tus nqi ntau dua li thickening rau ntau dua los yog sib npaug li 25mm.
Thick-Gauge Applications (>20 hli): Tsuas yog siv 25mm + S335J2W rau qhov tseem ceeb ntawm kev thauj khoom -cov khoom siv hauv cov hluav taws kub txaus ntshai (xws li, cov khoom siv hluav taws xob txhawb nqa). Rau feem ntau cov xwm txheej, 20mm nrog cov txheej txheem hluav taws kub yog kev lag luam ntau dua.
Hauv cov ntsiab lus, S335J2W lub thickness zoo cuam tshuam rau hluav taws kub thiab siab - kub ua haujlwm los ntawm kev txhim kho thermal inertia. Txawm li cas los xij, kev txhim kho toj siab siab tshaj 25mm. Xaiv qhov tuab tuab raws li qhov ntsuas kub thiab qhov yuav tsum tau ua ntawm hluav taws xob hluav taws xob- nrog rau cov txheej txheem tiv thaiv hluav taws kub xaiv- ua kom muaj kev nyab xeeb ntawm cov qauv thiab cov nqi tsim nyog. Rau kev ntseeg siab, lees paub S335J2W cov khoom siv kho tshuab tiag tiag nrog cov neeg muag khoom, vim nws yog qib tsis yog{11}} tus qauv.
