Hauv kev lag luam xws li kev tsim cov yeeb nkab, kev tsim kho vaj tsev, kho kom zoo nkauj sab hauv, thiab kev thauj mus los ntawm cov dej tshuaj, cov kav hlau tsis muaj steel, nrog rau lawv qhov zoo ntawm kev tiv thaiv corrosion, siab zog, kev pab lub neej ntev, thiab zoo nkauj tsos, tau dhau los ua ib qho ntawm cov kav dej siv ntau tshaj plaws. Ntau tus neeg yuav khoom, engineers, thiab distributors feem ntau pom lawv tus kheej puzzled los ntawm ntau yam stainless hlau qib thaum xaiv cov ntaub ntawv: 201, 304, 316L, 430… Qhov sib txawv ntawm cov qib sib txawv no yog dab tsi? Yuav ua li cas yuav tsum xaiv raws li qhov kev siv scenario? Niaj hnub no, peb yuav ua tib zoo tshuaj xyuas cov ntaub ntawv tseem ceeb ntawm cov yeeb nkab steel hlau hauv kev ua lag luam, piav qhia cov yam ntxwv, qhov sib txawv, thiab cov kev siv tsim nyog ntawm txhua hom, thiab pab txhua tus kom tsis txhob xaiv cov khoom yuam kev. Cov kav hlau tsis huv hauv kev lag luam feem ntau muab faib ua plaub pawg: 200 series, 300 series, 400 series, thiab duplex stainless hlau. Cov khoom sib txawv sib txawv ntawm cov hlau muaj pes tsawg leeg, kev tiv thaiv corrosion, hlau nplaum, siab -kub tsis kam, kev ua haujlwm, thiab tus nqi, uas kuj yog cov txheej txheem tseem ceeb rau kev sib txawv ntawm qib.
一. 200 Series Stainless Steel Pipes: High Manganese, Tsawg Nickel, Tus Nqi -Kev Xaiv Zoo
Cov ntaub ntawv sawv cev: 201, 202
Series 200 belongs rau austenitic stainless hlau. Txhawm rau txo cov nqi, manganese yog siv los hloov ib feem ntawm cov npib tsib xee, ua rau nws tam sim no cov yeeb nkab stainless hlau pheej yig tshaj plaws nyob rau hauv kev ua lag luam.Tom qab ua haujlwm txias, hom yeeb nkab no nthuav tawm cov hlau nplaum me ntsis. Nws qhov yooj yim xeb kuj yog nruab nrab thiab tsuas yog haum rau qhuav, tsis yog -corrosive nyob rau hauv ib puag ncig. Cov railings sab hauv tsev, cov kav dej rooj tog, cov khoom siv hauv tsev zoo tib yam, thiab cov kav dej yooj yim ib ntus feem ntau siv 201 stainless hlau kav.
Nws qhov tsis zoo yog qhov pom tseeb heev: tsis zoo tiv thaiv ntsev thiab kua qaub thiab alkalis. Yog hais tias sab nraum zoov, nyob rau hauv ntug dej hiav txwv, los yog nyob rau hauv cov chaw ntub dej rau lub sij hawm ntev, nws yooj yim heev rau xeb thiab txhim kho qhov chaw. Yog li ntawd, nws tsis pom zoo kiag li rau kev siv dej thiab kev tso dej, tshuaj lom neeg, kev tsim vaj tsev sab nraum zoov, lossis cov phiaj xwm ntug dej hiav txwv. Yog hais tias ib tug dig muag xaiv 201 es tsis txhob siab - cov ntaub ntawv kawg tsuas yog mus nrhiav tus nqi qis, tom qab kev kho thiab hloov cov nqi yuav nce ntxiv.
2. 300 Series Stainless Hlau Yeeb Nkab: Kev Ua Tau Zoo Tshaj Plaws, Kev Lag Luam Loj
Lub 300 series tseem yog austenitic stainless hlau thiab tam sim no yog cov khoom siv dav tshaj plaws nrog lub koob npe ruaj khov tshaj plaws. Nws tsis yog tag nrho - sib nqus, nrog kev sib npaug ntawm kev tiv thaiv corrosion, toughness, thiab vuam kev ua tau zoo, thiab nws cov qib tshwj xeeb yog tsom rau siab heev.
1. 304 Stainless hlau yeeb nkab (General Benchmark)
Qhov no yog cov zaub mov classic tshaj plaws - qib stainless hlau nyob rau hauv pej xeem kev nkag siab, nrog rau kev sib npaug ntawm chromium thiab npib tsib xee piv, zoo- kev ua tau zoo tag nrho, zoo heev tiv thaiv dej tsis qab ntsev, thiab zoo oxidation tsis kam ntawm qhov kub thiab txias. Nws kuj yog yooj yim heev rau txheej txheem, khoov, thiab vuam.
Nrog nws cov yam ntxwv ntawm kev nyab xeeb, tsis yog - lom, thiab ruaj khov, 304 stainless hlau kav npog feem ntau ntawm cov neeg pej xeem thiab cov xwm txheej ntawm kev lag luam: cov kav dej haus, cov khoom siv ua zaub mov, cov dej hauv nroog thiab cov dej ntws, kev kho vaj tse, cov cuab yeej siv tshuab zoo tib yam kav dej, thiab lwm yam. Nws tuaj yeem siv sab hauv tsev thiab sab nraum zoov, cov khoom siv ua khoom noj, cov kav dej thiab cov kav dej, thiab lwm yam. engineering khoom.
2. 304L Stainless Hlau Yeeb (Low Carbon Upgraded Version)
Raws li 304, cov ntsiab lus carbon yog txo. Nws lub ntsiab kom zoo dua yog qhov muaj zog vuam kev ua tau zoo, ua rau nws tsis tshua muaj kev cuam tshuam rau intergranular corrosion tom qab vuam, thiab cov welds tsis yooj yim tawg lossis xeb.
Nws yog qhov tsim nyog rau cov kav dej loj, cov kav dej tso rau hauv lub tank, thiab ntev - cov kav dej nyob deb uas yuav tsum tau siv dav hauv - qhov chaw vuam, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev lag luam vuam scenarios.
3. 316 thiab 316L Stainless Steel Pipes (High Corrosion-Resistant Versions)
Ob qho khoom muaj xws li ntxiv molybdenum, uas yog qhov sib txawv tseem ceeb piv rau 304. Molybdenum zoo heev txhim kho cov yeeb nkab tiv thaiv chloride ions, ntsev tsuag, thiab kua qaub-puag corrosion, ua rau nws cov corrosion kuj zoo dua rau 304, thiab tus nqi sib raug siab dua.
Ntawm lawv, 316L yog qhov qis -carbon version, muab kev ruaj ntseg zoo dua tom qab vuam. Cov kav dej no tau tsim tshwj xeeb rau thaj chaw ntug dej hiav txwv, kev tsim kho dej hiav txwv, kev thauj dej hiav txwv, tshuaj, tshuaj zoo, kev kho dej khib nyiab, thiab lwm qhov chaw uas muaj corrosive heev, thiab kuj tseem siv rau hauv cov khoom siv kho mob thiab qib siab -cov khoom siv tu cev. Hauv cov xwm txheej uas muaj ntsev lossis tshuaj chlorine, qhov twg 304 siv tsis tau, 316L feem ntau yog qhov kev xaiv.
4. 321 Stainless hlau yeeb nkab (Tshwj xeeb tsim rau kub kub)
Titanium cov ntsiab lus tau ntxiv rau cov khoom siv, feem ntau kom ruaj khov rau cov qauv hlau. Nws tuaj yeem tswj tau qhov kev ua haujlwm ruaj khov nyob rau hauv siab - qhov kub thiab txias ib puag ncig ntawm 450℃txog 850 degree, nrog kev ua haujlwm zoo rau siab - kub oxidation thiab intergranular corrosion.
Nws tsis muaj zog tshwj xeeb hauv cov kua qaub thiab alkali tsis kam, tab sis tsom rau siab -kub tsis kam, thiab feem ntau yog siv hauv boiler pipelines, heat exchangers, thiab industrial high-temperature flue gas deliver pipelines, of other high-temperature applications.
3.400 Series Stainless Hlau Pipes: Ferritic / Martensitic, Ib txwm sib nqus
Tsis zoo li cov tsis yog -magnetic 300 series, 400 series stainless hlau yog cov hlau nplaum tag nrho, tsis muaj npib tsib xee, muaj tus nqi qis dua, thiab tau muab faib ua ob qho kev qhia tseem ceeb raws li kev ua haujlwm.
1. 430 Stainless Hlau Yeeb Nkab (Nyob rau kev kho kom zoo nkauj thiab siv txhua hnub)
Nws belongs rau ferritic stainless hlau, muaj ib tug zoo nto polishing nyhuv, nruab nrab xeb kuj, thiab yog tus nqi - zoo. Nws cov kev tiv thaiv corrosion tsis muaj zog dua 304 tab sis zoo dua 201. Nws yog feem ntau siv rau hauv cov khoom siv hauv chav ua noj, cov khoom siv, cov kav dej zoo tib yam, thiab cov khoom siv rau cov tshuaj nitric acid corrosion me ntsis. Haum rau cov xwm txheej uas tsis tas yuav muaj lub zog siab, tsom mus rau qhov pom thiab kev tiv thaiv xeb yooj yim.
2. 409, 410, 420 Stainless hlau kav (Tshav kub-resistant, Siab- zog Versions)
409 feem ntau hais txog kev tiv thaiv tshav kub thiab feem ntau yog siv hauv cov kav dej hauv tsheb thiab kev lag luam qis - kub flue gas pipelines; 410 thiab 420 yog martensitic stainless hlau nrog cov ntsiab lus carbon ntau dua, uas tuaj yeem ua rau muaj zog thiab lub zog los ntawm kev kho cua sov, tab sis lawv cov corrosion kuj yog nruab nrab. Cov kav dej no tsis yog siv los tiv thaiv - cov kav dej xeb thiab feem ntau siv los tsim cov li qub, shafts, cov khoom siv kho tshuab, riam, thiab lwm yam khoom uas yuav tsum tau muaj zog thiab hnav tsis kam.
5. Kev txheeb xyuas cov khoom ceev thiab cov ntsiab lus ntawm kev yuav khoom
Ua ke cov yam ntxwv saum toj no, peb npaj cov kev yuav khoom hauv txoj hauv kev yooj yim tshaj plaws los pab txhua tus neeg sai sai raws li lawv cov kev xav tau:
1.Limited pob nyiaj, purely sab hauv tsev qhuav ib puag ncig:xaiv 201, tsuas yog rau kev kho kom zoo nkauj thiab cov qauv yooj yim, tsis sib cuag nrog dej lossis corrosive media;
Cov xwm txheej dav dav, dej haus, khoom noj khoom haus, kev tsim vaj tsev tsis tu ncua, ib puag ncig sab hauv tsev thiab sab nraum zoov: thawj qhov kev xaiv 304, raws li nws muaj cov nqi sib npaug tshaj plaws -kev ua tau zoo thiab kev ua haujlwm;
2.Pipeline tej yaam num nrog dav vuam:ua ntej 304L;
3.High-corrosion ib puag ncig xws li thaj chaw ntug dej hiav txwv, ntug hiav txwv dej, dej hiav txwv, tshuaj, tshuaj:mus rau 316/316L;
4.High-cov kav dej kub, boilers, khoom siv hluav taws xob hloov pauv:siv 321;.
5.Cov khoom siv hauv tsev, kho kom zoo nkauj zoo nkauj, me me corrosion kuj:xaiv 430;
6.Mechanical qhov chaw, siab - kub tso tawm, siab - hardness Cheebtsam:siv 409, 410, 420.
Hauv kev yuav khoom ntawm cov kav hlau stainless, tsis muaj cov khoom siv zoo tshaj plaws, tsuas yog cov khoom tsim nyog tshaj plaws. Ntau tus neeg yuav khoom yooj yim poob rau hauv qhov ntxiab ntawm 'tseem ceeb ntawm tus nqi,' hloov siab -xov cov kav dej nrog cov khoom siv qis dua -, uas thaum kawg ua rau muaj teeb meem xws li xeb, xau, thiab qhov project rework. Nkag siab txog qhov sib txawv ntawm cov ntaub ntawv, thiab txiav txim siab txog yam xws li kev siv ib puag ncig, kev tiv thaiv corrosion, qhov kub thiab txias, thiab kev siv nyiaj txiag, yog tib txoj hauv kev los xaiv cov khoom siv ruaj khov, tsis muaj teeb meem -dawb, thiab tus nqi- cov kav dej stainless hlau zoo, txo qis kev taug kev hauv kev yuav khoom thiab siv.