1. Puas yog ERW steel kav rov ua dua tshiab?
Yog lawm, ERW steel kav yog cov khoom siv rov ua dua tshiab. Hlau yog cov khoom siv rov ua dua tshiab, thiab ERW cov kav dej yog ua los ntawm cov hlau strips, uas tuaj yeem siv dua thiab rov siv dua tom qab muab pov tseg. Cov txheej txheem rov ua dua ntawm ERW cov kav dej yog qhov yooj yim: cov kav dej pov tseg tau sau, txheeb, thiab tom qab ntawd yaj thiab rov ua dua rau hauv cov hlau tshiab lossis lwm yam khoom siv hlau. Recycling ERW kav dej tsis yog tsuas yog txuag cov peev txheej xwb tab sis kuj txo cov pa phem ib puag ncig, uas yog raws li lub tswv yim ntawm ntsuab thiab kev txhim kho kom ruaj khov.
2. Dab tsi yog qhov txawv ntawm cov kav dej dub ERW thiab galvanized ERW kav?
Qhov sib txawv tseem ceeb ntawm cov kav dej dub ERW thiab cov kav dej galvanized ERW yog nyob rau hauv kev kho deg thiab corrosion kuj: dub ERW kav yog uncoated, nrog ib tug dub oxide txheej nyob rau saum npoo, uas muaj tsis zoo corrosion kuj thiab yog haum rau sab hauv tsev, qhuav, thiab tsis yog - corrosive ib puag ncig (xws li cov dej hauv tsev, siv scaffolding); galvanized ERW kav dej yog kho nrog kub-dip galvanizing lossis electro-galvanizing, nrog zinc txheej rau ntawm qhov chaw, uas muaj corrosion kuj zoo heev thiab haum rau sab nraum zoov, hauv av, los yog corrosive ib puag ncig (xws li cov dej sab nraum zoov, kev ua liaj ua teb, dej hiav txwv). Tsis tas li ntawd, tus nqi ntawm cov kav dej galvanized ERW yog me ntsis siab dua li cov kav dej dub ERW vim yog qhov ntxiv los tiv thaiv- tus nqi kho corrosion.
3. Cov kav dej ERW puas tuaj yeem siv rau kev thauj dej haus?
Yog lawm, ERW steel kav siv tau rau kev thauj dej haus, tab sis lawv yuav tsum ua kom tau raws li cov qauv kev noj qab haus huv uas cuam tshuam thiab raug coj los tiv thaiv sab hauv - kev kho corrosion. Sab hauv phab ntsa ntawm cov yeeb nkab yuav tsum tau coated nrog cov zaub mov- qib tiv thaiv- cov khoom siv corrosion (xws li epoxy resin txheej uas ua tau raws li GB 5749-2022 cov qauv kev huv dej haus) kom tiv thaiv cov yeeb nkab steel los ntawm xeb thiab ua paug rau cov dej haus. Tsis tas li ntawd, cov khoom siv raw ntawm cov yeeb nkab yuav tsum tsis muaj tshuaj lom thiab tsis muaj teeb meem, thiab kev tshuaj xyuas nruj yuav tsum tau ua kom ntseeg tau tias cov yeeb nkab tsis tso cov khoom tsis zoo rau hauv cov dej haus.
4. Qhov ntev ntawm ERW steel yeeb nkab yog dab tsi?
Qhov ntev ntev ntawm ERW steel kav yog siv raws li cov qauv tsim (xws li GB / T 3091, API 5L). Rau sab nraud txoj kab uas hla: rau cov kav dej uas muaj txoj kab uas hla sab nraud Tsawg dua lossis sib npaug li 108mm, qhov kam rau ua yog ± 0.5mm; rau cov kav dej nrog txoj kab uas hla sab nraud> 108mm, qhov kam rau ua yog ± 1% ntawm cov kab sab nraud. Rau phab ntsa thickness kam rau ua: qhov dav dav yog ± 10% ntawm phab ntsa thickness, thiab qhov tsawg kawg nkaus phab ntsa thickness yuav tsum tsis pub tsawg tshaj 90% ntawm nominal phab ntsa thickness. Rau qhov ntev ntev: qhov ntev ntev ntawm qhov ruaj khov- ntev kav yog ± 50mm. Peb kuj tseem tuaj yeem muab cov kav dej nrog kev ua siab ntev ntev raws li cov neeg siv khoom xav tau, tab sis nws yuav ua rau tus nqi ntau lawm.
5. Puas yog ERW steel kav dej tiv taus siab corrosion tawg?
ERW steel kav muaj ib qho kev tiv thaiv rau siab corrosion cracking, tab sis nws nyob ntawm cov khoom qib thiab siv ib puag ncig. Tsawg-cov pa roj carbon steel thiab qis- alloy steel ERW kav dej muaj qhov ua haujlwm zoo rau lub siab corrosion cracking nyob rau hauv dav dej thiab nruab nrab ib puag ncig; Txawm li cas los xij, nyob rau hauv ib puag ncig corrosive uas muaj chloride ions (xws li dej hiav txwv, dej ntsev) los yog acidic / alkaline xov xwm, qhov kev pheej hmoo ntawm kev kub siab corrosion yuav nce. Txhawm rau txhim kho qhov ua haujlwm siab corrosion cracking, peb tuaj yeem xaiv cov khoom siv qib siab -qib alloy steel, ua haujlwm zoo los tiv thaiv- kev kho corrosion (xws li 3PE txheej), thiab tswj kev ua haujlwm siab thiab kub ntawm cov yeeb nkab.
