Feem ntau siv cov kav dej tua hluav taws tua hluav taws feem ntau suav nrog cov kav dej hlau, cov kav hlau txuas, cov kav hlau tsis sib haum, cov kav tooj liab, cov kav hlau tsis muaj steel, cov kav hlau thiab cov kav dej sib txuas. Cov kav dej yas kuj tseem siv tau los ua cov kav dej tua hluav taws. Kev txwv nruj.
1. Cov kav dej yeeb nkab yog siv rau hauv cov kav dej faus rau hauv pem hauv ntej ntawm lub tswb valve ntawm cov tshuab tsis siv neeg sprinkler thiab faus cov kav dej ntawm cov hluav taws kub hydrant systems. Cov kev qhia tshwj xeeb ntawm cov kav hlau kav uas feem ntau siv hauv kev tsim hluav taws xob yog DN40 ~ DN250.
2. Welded steel kav rau qhov hluav taws kub dej system tuaj yeem muab faib ua cov kav dej zoo tib yam welded steel kav thiab kub-dip galvanized welded steel kav.
(1) Ordinary welded steel kav yog tsim rau faus pipelines ntawm hluav taws kub hydrant dej system; cov kav dej nyob rau hauv pem hauv ntej ntawm lub tswb valve ntawm lub tshuab tsis siv neeg lub tshuab nqus dej thiab cov dej tua hluav taws tua hluav taws yuav tsum tau lim dej ntxiv ua ntej lub tswb nrov li qub. Thaum cov welded steel yeeb nkab siv rau hauv av, kev kho corrosion yuav tsum tau nqa tawm raws li qhov yuav tsum tau ua, txwv tsis pub nws yooj yim rau xeb thiab cuam tshuam rau lub neej kev pab cuam.
(2) Kub-dip galvanized welded steel yeeb nkab yog tsim rau faus thiab nyiaj siv ua haujlwm kav dej ntawm hluav taws kub hydrant dej system, tsis siv neeg lub tshuab tua hluav taws tua hluav taws thiab cov dej tua hluav taws tua hluav taws. Thaum nws siv hauv av, kev tiv thaiv corrosion kuj yuav tsum tau xav txog.
3. Raws li nws cov txheej txheem ntau lawm, seamless steel kav feem ntau muab faib ua ob hom: kub dov thiab txias kos duab. Raws li cov khoom siv, nws tuaj yeem muab faib ua cov pa roj carbon zoo tib yam, cov pa roj carbon zoo, cov hlau tsis tshua muaj hlau thiab cov hlau alloy steel.
Seamless steel kav muaj peev xwm ua tau zoo. Hauv cov dej tua hluav taws, lawv feem ntau siv los ua cov kav dej loj lossis cov kav dej hauv qhov qis ntawm qhov system uas qhov kev ua haujlwm siab dua.
