Daim ntawv thov ntawm stainless hlau tubing nyob rau hauv roj av thiab petrochemical kev lag luam

Daim ntawv thov ntawm stainless hlau tubing nyob rau hauv roj av thiab petrochemical kev lag luam

Stainless hlau raws li cov tshuaj muaj pes tsawg leeg yuav muab faib ua Cr stainless hlau, CR-Ni stainless hlau, CR-Ni-Mo stainless hlau, raws li daim ntawv thov teb yuav muab faib mus rau hauv kev kho mob stainless hlau, atmospheric corrosion resistant stainless hlau, anti- oxidation stainless hlau, Cl - corrosion resistant stainless hlau.Tab sis feem ntau siv kev faib tawm yog raws li cov qauv ntawm cov hlau los faib, feem ntau tuaj yeem muab faib ua ferritic stainless hlau, austenitic stainless hlau, martensitic stainless hlau, duplex stainless hlau thiab nag lossis daus hardening stainless hlau.Hauv kev siv roj av thiab petrochemical, austenitic stainless hlau, ferritic stainless hlau thiab duplex stainless hlau account rau ib feem loj.
Ferritic stainless hlau Cr cov ntsiab lus feem ntau ntawm 13% -30%, C cov ntsiab lus feem ntau tsawg dua 0.25%, los ntawm kev sib tsoo lossis kev laus, carbide nyob rau hauv ferritic grain ciam teb nag lossis daus, kom ua tiav corrosion kuj.Feem ntau hais lus, qhov corrosion kuj ntawm ferritic stainless hlau yog qis dua austenitic stainless hlau thiab duplex hlau, tab sis siab dua martensitic stainless hlau.Tab sis vim nws cov nqi qis qis dua piv nrog lwm cov hlau tsis muaj steel, yog li ntawd, nyob rau hauv cov tshuaj thiab petrochemical daim ntaub ntawv, rau corrosion resistant nruab nrab thiab lub zog yuav tsum tsis muaj siab nyob rau hauv daim ntawv thov Scope.Xws li nyob rau hauv cov roj sulfur, hydrogen sulfide, chav tsev kub nitric acid, carbonic acid, hydrogen ammonia niam cawv, urea zus tau tej cov ammonia kub, urea niam cawv thiab vinylon zus tau tej cov vinyl acetate, acrylonitrile thiab lwm yam ib puag ncig yog dav siv.

Cov ntsiab lus Cr dav dav ntawm martensitic stainless hlau yog nruab nrab ntawm 13% -17%, thiab C cov ntsiab lus siab dua, ntawm 0.1% thiab 0.7%.Nws muaj zog dua, hardness thiab hnav tsis kam, tab sis corrosion kuj yog qis dua.Nws yog tsuas yog siv nyob rau hauv cov roj av thiab petrochemical teb nyob rau hauv ib puag ncig uas corrosive nruab nrab tsis muaj zog, xws li siab toughness thiab cuam tshuam load Cheebtsam, xws li chav turbine hniav, bolts thiab lwm yam khoom thiab cov khoom.

Cov ntsiab lus ntawm Cr hauv austenitic stainless hlau yog nruab nrab ntawm 17% -20%, cov ntsiab lus ntawm Ni yog nruab nrab ntawm 8% -16%, thiab cov ntsiab lus ntawm C feem ntau qis dua 0.12%.Cov qauv austenitic tuaj yeem tau txais ntawm chav tsev kub los ntawm kev ntxiv Ni kom nthuav dav austenitic transformation cheeb tsam.Austenitic stainless hlau corrosion kuj, plasticity, toughness, kev ua tau zoo, vuam kev ua tau zoo, tsis tshua muaj kub kev ua tau zoo piv rau lwm yam stainless hlau yog zoo heev, yog li nws daim ntawv thov nyob rau hauv ntau yam teb kuj yog qhov dav tshaj plaws, nws siv li ntawm 70% ntawm tag nrho cov nyiaj. ntawm tag nrho cov stainless hlau.Nyob rau hauv kev lag luam roj av thiab petrochemical, muaj zog corrosive nruab nrab thiab qis kub nruab nrab, qhov zoo ntawm austenitic stainless hlau yog loj, xws li siab corrosion kuj, tshwj xeeb tshaj yog nyob rau hauv lub puab tivthaiv nyob rau hauv tsis kam mus rau intergranular corrosion ib puag ncig, xws li tshav kub exchanger / yeeb fittings, cryogenic Liquefied natural gas (LNG) pipeline, xws li urea, sulfur ammonia ntau lawm thawv, flue gas plua plav tshem tawm thiab desulfurization ntaus ntawv.

Duplex stainless hlau yog tsim los ntawm ib-theem stainless hlau, nws cov ntsiab lus Ni feem ntau yog ib nrab ntawm austenitic stainless hlau Ni cov ntsiab lus, txo cov nqi alloy.Austenitic stainless hlau muaj kev tiv thaiv corrosion zoo heev thiab kev ua haujlwm siab, nws daws qhov tsis muaj zog ntawm ferritic thiab martensitic stainless hlau corrosion kuj, austenitic stainless hlau lub zog thiab hnav tsis kam.Hauv kev lag luam roj av thiab petrochemical, nws tsuas yog siv rau hauv seawater corrosion resistant offshore roj platforms, acidic Cheebtsam thiab cov khoom siv, tshwj xeeb tshaj yog nyob rau hauv pitting corrosion resistant Cheebtsam.

Los nag ntxiv dag zog rau cov hlau tsis muaj zog yog feem ntau los ntawm nag lossis daus los txhim kho cov txheej txheem kom tau txais lub zog ua haujlwm siab, nws kuj txi nws tus kheej corrosion kuj, yog li nws tsis tshua siv hauv nruab nrab corrosive, feem ntau siv hauv petrochemical machinery mining thiab lwm yam lag luam.

Daim ntawv thov ntawm stainless hlau tubing nyob rau hauv roj av thiab petrochemical kev lag luam

Petroleum thiab petrochemical kev lag luam yog lub hauv paus kev lag luam ntawm lub teb chaws kev khwv nyiaj txiag, uas plays lub luag hauj lwm tseem ceeb nyob rau hauv lub teb chaws kev khwv nyiaj txiag.Nyob rau hauv 20 xyoo dhau los, stainless hlau yeeb nkab txawm seamless yeeb nkab los yog welded yeeb nkab nyob rau hauv ntau lawm technology tau zoo heev.Cov yeeb nkab steel hlau uas tsim los ntawm qee cov tuam txhab tsim khoom hauv tsev tau mus txog qib uas tuaj yeem hloov pauv cov khoom lag luam, paub txog thaj chaw ntawm cov yeeb nkab steel.

Hauv kev lag luam roj av thiab kev lag luam petrochemical, cov yeeb nkab steel hlau tsis yog tsuas yog siv hauv cov raj xa dej, suav nrog lub tshuab hluav taws xob siab, cov kav dej, cov roj av tawg, cov kav dej xa dej, cov raj xa hluav taws xob thiab lwm yam.Stainless hlau yuav tsum ua tau zoo nyob rau hauv ntub dej thiab acid kev pab.