09CrCuSb Welded Steel Pipes yog dab tsi?
09CrCuSb Welded Hlau Yeeb Nkabyog ib qho qis- alloy steel tshwj xeeb tsim los tiv thaiv qis- kub sulfuric acid dew point corrosion hauv lub zog tsim hluav taws xob, petrochemical, thiab metallurgical industries. Cov alloy muaj tsawg dua los yog sib npaug ntawm 0.09% carbon thiab yog alloyed nrog chromium (Cr), tooj liab (Cu), thiab antimony (Sb) los tsim ib qho corrosion-resistant microstructure.
Nyob rau hauv lub chaw kuaj mob (70% H₂SO₄ ntawm 70℃rau 24 teev), nws tus nqi corrosion tsawg dua los yog sib npaug rau 14 mg / (cm²·h), muab ntau tshaj peb npaug ntawm corrosion kuj ntawm 20G carbon steel.
Tsim los ua seamless los yog welded hlab nrog meej qhov ntev tswj, 09CrCuSb yog dav siv hauv flue gas desulfurization (FGD) systems, cua preheaters, economizers, thiab tshav kub exchangers, qhov chaw ua hauj lwm kub yog feem ntau nyob rau hauv lub sulfuric acid dew point corrosion ntawm 60-150 degree.
Qhov tseem ceeb engineering tus nqi ntawm 09CrCuSb nyob rau hauv nws tailored tsis kam mus rau txias - kawg sulfuric acid condensation. Thaum lub sij hawm combustion ntawm leej faj- nplua nuj fuels, sulfur dioxide (SO) gas reacts nrog ya raws nyob rau hauv qis - qhov kub thiab txias zones - xws li stacks thiab preheater ciam teb - ua ib tug heev corrosive sulfuric acid dew uas sai degrades txheem carbon steels.
Kev ntsuam xyuas enchmarking qhia tau hais tias nyob rau hauv 50% sulfuric acid tov ntawm 60 degree, tus nqi corrosion ntawm 09CrCuSb tsuas yog txwv tsis pub.1/5 txog 1/8ntawm tus qauv Q235 carbon steel, zoo txuas ntxiv ua haujlwm lifespan ntau dua 3 zaug.
Kev Tswj Xyuas Zoo ntawm 09CrCuSb Welded Steel Pipes
Kev tsim cov khoom ncaj nraim -seam welded 09CrCuSb piping yuav tsum muaj kev tswj nruj ntawm kev txiav, sib sau, vuam, thiab kev ua haujlwm loj. Txhawm rau ua kom muaj kev ncaj ncees ntawm cov khoom siv, cov kev tswj hwm hauv qab no raug tswj hwm:
Slab & Rolling Metallurgy:Thermomechanical Controlled Processing (TMCP) yog qhov yuav tsum tau ua kom tshem tawm cov tshuaj cais tawm thiab lav qhov tsis sib xws ntawm Cu thiab Sb. Kub-rolled coil inputs yuav tsum muaj ib tug nruj gauge kam rau ua nyob rau hauv± 0.2 hlikom stabilize tom qab seam welding.
Seam welding raws tu qauv:High -Frequency Resistance Vuam (HFW) los yog Submerged Arc Vuam (SAW) yog siv. Thaum tshav kub kub- thaj tsam cuam tshuam (HAZ) yuav tsum tau tswj nruj me ntsis ntawm900℃thiab 1100 degreelos tiv thaiv oxidation alloy. Tam sim ntawd online induction annealing yog siv tom qab-weld los txo cov thermal stresses seem.
Tsis yog -Kev Ntsuas Kev Puas Tsuaj (NDT):Yuav tsum ua khub ntawm100% Eddy Current Testing (ECT)thiabKev kuaj ultrasonic (UT)yog siv thoob plaws tag nrho cov yeeb nkab lub cev, nrog xoom- cov txheej txheem kam rau ua rau cov kab nrib pleb, suav nrog, lossis tsis muaj fusion ntawm qhov vuam seam.
Daim ntawv thov ntawm 09CrCuSb ncaj- seam piping
09CrCuSb ncaj- seam steel kav yog dav siv nyob rau hauv thermal fais fab nroj tsuag, tshwj xeeb tshaj yog nyob rau hauv Gas-Gas Heaters (GGH), flue ducts, expansion pob qij txha, cua preheaters, thiab flue gas desulfurization (FGD) systems. Lawv tsis kam mus rau sulfuric acid dew point corrosion ua rau lawv haum rau ntev - kev pab cuam nyob rau hauv qis - kub flue gas ib puag ncig.
Nyob rau hauv refinery sulfur rov qab units thiab petrochemical nroj tsuag, 09CrCuSb kav feem ntau yog siv los lis ntub flue gases uas muaj H₂S thiab SO₂ ntawm kev khiav hauj lwm kub txog li 150 degree. Qhov no yuav pab txo qis corrosion- cuam tshuam txog kev ua tsis tiav thiab txuas ntxiv lub neej kev pabcuam khoom siv.
Hauv 600 MW thermal fais fab nroj tsuag retrofit, hloov cov pa hlau nrog 8 hli -tick 09CrCuSb kav dej tau nce lub neej kev pab cuam ntawm lub tshuab hluav taws xob los ntawm 2 xyoo mus rau 6 xyoo thaum txo tus nqi kho cov qauv kwv yees li 40%.
Rau cov chaw tsim hluav taws xob hauv hiav txwv lossis cov ntug dej hiav txwv, qhov twg cov tshuaj chloride raug hnyav dua, kev siv tshuaj tiv thaiv ntxiv -corrosion coatings raug pom zoo vim 09CrCuSb tsuas yog muaj kev cuam tshuam rau cov tshuaj chloride -induced pitting corrosion.
Cov lus pom zoo rau kev siv 09CrCuSb Steel Tubes
1. Kev xaiv cov khoom siv
Xaiv cov phab ntsa uas tsim nyog raws li qhov kub ntawm cov pa roj, ntws nrawm, thiab cov kab mob corrosion. Rau cov ntawv thov uas muaj qhov siab - cov pa hluav taws xob nrawm lossis ya tshauv yaig, tuab dua - cov phab ntsa phab ntsa raug pom zoo los txhim kho lub neej kev pabcuam.
2. Vuam thiab kev teeb tsa
Siv cov ntaub ntawv muab tub lim tau sib xws nrog 09CrCuSb steel thiab ua raws li cov txheej txheem vuam tsim nyog kom muaj kev tiv thaiv corrosion hauv tshav kub- thaj tsam cuam tshuam. Cov yeeb nkab txhawb nqa thiab kev ua kom zoo yuav tsum tau muab los txo qis kev vibration thiab mechanical stress thaum lub sijhawm ua haujlwm.
3. Kev tshuaj xyuas thiab kev tu
Ua tsis tu ncua kev tshuaj xyuas thaum lub sijhawm teem sijhawm kaw, ua tib zoo saib xyuas cov phab ntsa tuab, welds, thiab thaj chaw raug sulfuric acid dew point corrosion. Yog tias pom muaj qhov tseem ceeb ntawm cov phab ntsa thinning los yog hauv zos corrosion, kho lossis hloov qhov cuam tshuam tam sim kom ua haujlwm zoo.
Hu rau tam sim no kom tau txais 09CrCuSb seamless steel kav cov npe Tshuag
