1. Lub siab ntsuas ntawm cov kav dej carbon steel yog dab tsi, thiab nws txiav txim siab li cas?
Kev ntsuas siab (tseem hu ua cov chav kawm siab) ntawm cov pa roj carbon steel kav hais txog qhov siab tshaj plaws uas lawv tuaj yeem tiv taus nyob rau hauv qhov kub thiab txias. Nws yog txiav txim siab los ntawm cov khoom tso cai rau kev ntxhov siab, yeeb nkab phab ntsa thickness, thiab kev pabcuam kub. Cov kev ntsuas siab rau cov pa roj carbon steel muaj xws li ASME B16.5 cov chav kawm siab (xws li 150 #, 300 #, 600 #, thiab lwm yam) thiab API 5L qib siab (xws li X42, X52, X65, thiab lwm yam). Piv txwv li, ASTM A106 Qib B seamless yeeb nkab nrog lub nominal txoj kab uas hla ntawm 2 ntiv tes thiab phab ntsa tuab ntawm SCH 40 muaj qhov ntsuas siab ntawm 150 # ntawm 200 degree, uas txhais tau tias nws tuaj yeem tiv taus qhov siab tshaj plaws ua haujlwm ntawm 1.93 MPa (280 psi). Kev ntsuas siab txo qis thaum qhov kev pabcuam kub nce ntxiv vim tias qhov kev cia siab ntawm carbon steel txo qis ntawm qhov kub thiab txias.
2. Dab tsi yog qhov nominal diameters thiab phab ntsa thicknesses ntawm carbon steel kav?
Lub nominal txoj kab uas hla (DN) ntawm cov pa roj carbon steel kav yog tus qauv loj siv los sawv cev rau cov yeeb nkab txoj kab uas hla, uas tsis yog qhov tseeb sab hauv los yog sab nraud txoj kab uas hla. Cov kab nominal feem ntau yog los ntawm DN10 (0.39 ntiv tes) mus rau DN2000 (78.74 nti), npog me me - txoj kab uas hla rau cov dej hauv tsev thiab loj - cov kav dej loj rau kev lag luam engineering. Cov phab ntsa tuab feem ntau yog qhia los ntawm lub sijhawm (SCH), xws li SCH10, SCH20, SCH40, SCH80, SCH160, thiab XXS. SCH40 yog feem ntau siv phab ntsa tuab rau kev siv dav dav. Piv txwv li, DN100 (4-nti) carbon steel yeeb nkab nrog SCH40 muaj ib txoj kab uas hla ntawm 114.3 hli thiab phab ntsa thickness ntawm 6.02 hli. Cov phab ntsa tuab kuj tuaj yeem kho raws li cov neeg siv khoom xav tau rau qhov tshwj xeeb siab lossis kub kub.
3. Dab tsi yog qhov txawv ntawm cov kav dej carbon steel thiab cov kav hlau stainless?
Qhov sib txawv tseem ceeb ntawm carbon steel kav thiab stainless hlau kav yog nyob rau hauv cov khoom muaj pes tsawg leeg, corrosion kuj, nqi, thiab daim ntawv thov: (1) cov khoom muaj pes tsawg leeg: carbon steel kav yog tsim los ntawm hlau thiab carbon, hos stainless hlau kav muaj tsawg kawg yog 10.5% chromium, uas tsim ib tug passive oxide zaj duab xis rau saum npoo. (2) Corrosion resistance: Stainless hlau kav dej muaj kev tiv thaiv zoo heev rau cov dej, tshuaj lom neeg, thiab huab cua ib puag ncig, thaum cov pa roj carbon steel kav yuav ua rau xeb thiab xeb hauv qhov chaw ntub lossis corrosive thiab xav tau kev kho corrosion (xws li pleev xim, galvanizing). (3) Tus nqi: Carbon steel kav yog pheej yig dua li cov kav hlau tsis muaj steel, ua rau lawv tus nqi ntau dua - siv tau rau cov ntawv loj -. (4) Daim Ntawv Thov: Cov kav dej carbon steel tau siv dav hauv cov roj, roj, dej, thiab kev tsim kho kev lag luam uas yuav tsum muaj kev tiv thaiv corrosion tsis tshua muaj siab; stainless hlau kav yog siv nyob rau hauv cov khoom noj, tshuaj, tshuaj, thiab marine industries uas corrosion kuj tseem ceeb heev.
4. Yuav ua li cas tiv thaiv carbon steel kav los ntawm corrosion?
Muaj ntau ntau txoj hauv kev los tiv thaiv -corrosion rau cov pa roj carbon steel kav, nyob ntawm qhov chaw muab kev pab: (1) Painting: Siv cov tshuaj tiv thaiv - cov xim pleev xim (xws li cov xim epoxy, polyurethane xim) rau ntawm cov yeeb nkab los tsim cov yeeb yaj kiab tiv thaiv uas cais cov yeeb nkab los ntawm huab cua, dej, thiab corrosive media. Txoj kev no haum rau sab hauv tsev thiab sab nraum zoov uas tsis yog- ib puag ncig submerged. (2) Galvanizing: Kub-dip galvanizing lossis electro-galvanizing cov yeeb nkab nto, qhov twg zinc tsim cov txheej tiv thaiv uas txi nws tus kheej kom tiv thaiv cov hlau los ntawm corroding. Galvanized carbon steel kav yog siv dav hauv cov kav dej thiab sab nraum zoov. (3) Txheej: Siv cov txheej txheem corrosion{12}}cov khoom siv tiv taus (xws li polyethylene, polypropylene) rau sab hauv lossis sab nrauv ntawm cov yeeb nkab, uas tsim nyog rau cov kav dej tshuaj thiab cov kav dej phwj tuaj. (4) Kev tiv thaiv Cathodic: Siv kev tiv thaiv kev tiv thaiv anode cathodic (xws li zinc anodes) los yog kev tiv thaiv cathodic tam sim no rau cov kav dej hauv av lossis cov kav dej hauv dej kom qeeb corrosion. (5) Kev saib xyuas tsis tu ncua: Kev tshuaj xyuas lub sijhawm ntev ntawm cov yeeb nkab saum npoo, tshem tawm xeb, thiab rov- siv cov tshuaj tiv thaiv -corrosion coatings kom ntev kev pab cuam lub neej.
5. Dab tsi yog cov kev siv ntawm cov pa roj carbon steel kav?
Cov pa roj carbon steel kav muaj ntau yam kev siv thoob plaws ntau yam kev lag luam: (1) Kev lag luam roj thiab roj: Siv rau kev tshawb nrhiav roj thiab roj, drilling, thiab xa cov kav dej, suav nrog cov kav dej hiav txwv thiab ntug dej hiav txwv (API 5L carbon steel kav feem ntau siv). (2) Kev siv dej thiab tso dej: Siv rau hauv lub nroog cov dej, cov khoom siv dej, thiab cov kav dej phwj tuaj, feem ntau yog siv cov welded carbon steel kav lossis galvanized carbon steel kav. (3) Kev tsim kho kev lag luam: Siv rau kev txhawb nqa cov qauv (xws li scaffolding), cov kav dej cua sov, thiab hluav taws kub - cov kav dej sib ntaus sib tua. (4) Kev lag luam tshuaj: Siv rau kev thauj cov khoom siv tshuaj lom neeg, xws li cov kua qaub, alkalis, thiab cov kuab tshuaj (feem ntau yuav tsum tau ua los tiv thaiv - kho corrosion). (5) Kev tsim khoom siv tshuab: Siv los ua cov khoom siv tshuab, xws li shafts, tes tsho, thiab hydraulic pipelines. (6) Kev lag luam fais fab: Siv rau boiler pipelines, chav pipelines, thiab tshav kub pauv pipelines hauv thermal fais fab nroj tsuag.
