Taw qhia
Cov kav hlau hlau tau siv rau ntau pua xyoo hauv ntau yam kev siv, xws li kev thauj mus los ntawm cov kua dej mus rau kev tsim kho vaj tse thiab infrastructures. Txawm li cas los xij, raws li thev naus laus zis thiab cov ntaub ntawv tshawb fawb tau nce siab, cov kav hlau steel pib hloov nrog cov ntaub ntawv niaj hnub. Qhov no tau ua rau cov lus nug, thaum twg lawv tsis siv cov kav hlau? Nyob rau hauv tsab xov xwm no, peb yuav tshawb txog keeb kwm ntawm cov yeeb nkab steel, lawv qhov zoo thiab qhov tsis zoo, thiab thaum twg lawv pib ua theem.
Keeb kwm ntawm cov yeeb nkab steel
Cov kav hlau tau siv txij li xyoo 1800s, thaum lawv thawj zaug siv los ua qhov nruab nrab ntawm kev thauj mus los rau cov nkev. Tau ntau xyoo, lawv siv tau nthuav dav ntxiv rau kev thauj mus los ntawm lwm cov kua dej, xws li roj thiab dej. Cov kav hlau hlau tau siv dav hauv kev tsim vaj tsev thiab kev tsim vaj tsev, nrog rau cov kav dej, cov kav dej, cov kav dej, thiab cov qhov.
Qhov nrov ntawm cov yeeb nkab steel stems los ntawm lawv cov durability, lub zog, thiab tsis kam mus corrosion. Lawv kuj yog ib qho yooj yim rau kev tsim khoom, uas ua rau lawv muaj txiaj ntsig zoo rau ntau daim ntawv thov. Txawm li cas los xij, raws li thev naus laus zis thiab cov ntaub ntawv tshawb fawb tau dhau los, cov ntaub ntawv tshiab tau pib tsim uas muaj cov kev daws teeb meem zoo dua li cov hlau.
Qhov zoo thiab qhov tsis zoo ntawm cov yeeb nkab steel
Txawm hais tias cov yeeb nkab steel muaj ntau qhov zoo, lawv kuj tuaj nrog lawv cov kev ncaj ncees ntawm qhov tsis zoo. Cia peb saib ib co ntawm lawv.
Qhov zoo:
- Durability: Cov kav hlau steel paub txog lawv lub zog thiab kav ntev. Lawv tuaj yeem tiv taus siab thiab tsis yooj yim puas.
- Kev tiv thaiv corrosion: Cov kav hlau kuj tseem tiv taus corrosion, uas ua rau lawv xaiv zoo rau kev thauj cov kua dej uas tuaj yeem ua rau corrosive.
- Nqi-zoo: Hlau yog pheej yig thiab yooj yim rau kev tsim khoom, uas ua rau nws muaj txiaj ntsig zoo rau ntau daim ntawv thov.
Qhov tsis zoo:
- Hnyav: Cov kav hlau steel yog hnyav, uas tuaj yeem ua rau lawv nyuaj rau kev thauj thiab nruab.
- Yooj yim rau xeb: Thaum cov kav hlau tsis muaj zog tiv thaiv corrosion, lawv tseem tuaj yeem xeb nyob rau lub sijhawm, tshwj xeeb tshaj yog tias lawv raug cov dej noo.
- Txwv tsis pub muaj sia nyob: Cov kav hlau steel muaj lub neej ntev thiab yuav tsum tau hloov tom qab qee lub xyoo.
Thaum twg lawv tsis siv cov kav hlau?
Cov kav hlau hlau tau pib ua ntu zus nyob rau hauv nruab nrab -20th caug xyoo, raws li cov ntaub ntawv tshiab thiab thev naus laus zis tau tshwm sim uas muab cov kev daws teeb meem zoo dua. Ib qho ntawm cov laj thawj tseem ceeb rau qhov no yog kev txhim kho cov kav dej siab polyethylene (HDPE), uas yog lub teeb yuag, corrosion-resistant, thiab muaj lub neej ntev dua li cov kav hlau.
HDPE kav dej yog tsim los ntawm cov khoom siv thermoplastic uas muaj zog, ruaj khov, thiab tiv taus ntau yam tshuaj thiab ib puag ncig. Lawv kuj hloov tau, uas ua rau lawv yooj yim rau nruab dua li cov kav dej steel. Lwm qhov zoo ntawm HDPE kav dej muaj xws li:
- Kev ua neej ntev dua: HDPE kav dej tuaj yeem kav ntev txog 100 xyoo, uas yog qhov ntev dua li lub neej ntawm cov kav hlau.
- Lub teeb yuag: HDPE cov kav dej yog qhov sib zog dua li cov kav hlau, uas ua rau lawv yooj yim rau kev thauj thiab nruab.
- Kev tiv thaiv corrosion: HDPE kav yog resistant rau feem ntau cov ntaub ntawv ntawm corrosion, uas txhais tau hais tias lawv yuav tsum tau tsawg dua txij nkawm dua steel kav.
- Tus nqi zoo: Thaum cov kav dej HDPE kim dua cov kav hlau, lawv muaj lub neej ntev dua thiab xav tau kev saib xyuas tsawg dua, uas ua rau lawv siv nyiaj ntau dua nyob rau lub sijhawm ntev.
Raws li qhov txiaj ntsig zoo no, cov kav dej HDPE tau dhau los ua qhov kev xaiv zoo tshaj plaws rau ntau daim ntawv thov, suav nrog kev thauj mus los roj thiab dej, cov kav dej phwj tuaj, thiab cov kav dej ua haujlwm. Thaum cov kav hlau tseem siv tau rau hauv qee yam kev siv, xws li kev thauj mus los roj thiab qee cov txheej txheem kev lag luam, lawv cov kev siv tau poob qis ntau xyoo.
Xaus
Cov kav hlau steel muaj keeb kwm ntev ntawm kev siv ntau yam kev siv, xws li kev thauj mus los ntawm cov kua dej mus rau kev tsim vaj tsev thiab kev tsim kho vaj tse. Txawm hais tias lawv muaj ntau qhov zoo, lawv kuj tuaj nrog lawv cov kev sib raug zoo ntawm qhov tsis zoo, nrog rau lawv qhov hnyav, tsis kam mus rau xeb, thiab kev ua neej tsawg. Raws li thev naus laus zis thiab cov ntaub ntawv tshawb fawb tau dhau los, cov ntaub ntawv tshiab, xws li cov kav dej HDPE, tau pib tsim uas muaj cov kev daws teeb meem zoo dua li cov hlau. Raws li qhov tshwm sim, cov kav hlau hlau tau pib ua haujlwm nyob rau hauv nruab nrab -20 xyoo pua, thiab lawv cov kev siv tau poob qis rau ntau xyoo.
