Cov yeeb nkab zoo yuav tsum tsis yog tsuas yog muaj kev lag luam zoo xwb, tab sis kuj muaj cov txiaj ntsig zoo xws li ruaj khov thiab txhim khu kev qha, cov khoom siv cuam tshuam, tawg tsis kam, kev laus tsis kam, corrosion kuj, thiab lwm yam ib: Series zoo:
1. Txhim khu kev sib txuas: Cov kav dej polyethylene txuas nrog electrothermal fusion, thiab lub zog ntawm kev sib koom ua ke yog siab dua li ntawm cov yeeb nkab lub cev.
2. Muaj kev cuam tshuam zoo ntawm qhov kub thiab txias: qhov kub tsis tshua muaj embrittlement kub ntawm polyethylene yog qhov tsis tshua muaj siab, thiab nws tuaj yeem siv rau qhov kub thiab txias ntawm -60-60 degree. Thaum lub sij hawm tsim kho nyob rau hauv lub caij ntuj no, vim muaj kev cuam tshuam zoo ntawm cov khoom, cov yeeb nkab yuav tsis nkig.
3. Zoo kev ntxhov siab tawg tsis kam: HDPE muaj qhov tsis tshua muaj siab, siab shear zog thiab zoo heev khawb tsis kam, thiab nws ib puag ncig kev ntxhov siab tawg kuj tseem zoo heev.
4. Cov tshuaj tiv thaiv corrosion zoo: HDPE kav dej tiv taus corrosion los ntawm ntau yam tshuaj lom neeg, thiab cov tshuaj muaj nyob hauv cov av yuav tsis ua rau muaj kev puas tsuaj rau cov kav dej. Polyethylene yog ib qho hluav taws xob insulator, yog li nws tsis rot, xeb lossis electrochemically corrode; nws kuj tsis txhawb algae, kab mob los yog fungal loj hlob.
5. Kev tiv thaiv kev laus thiab kev ua haujlwm ntev: cov kav dej polyethylene uas muaj 2-2.5 feem pua ntawm cov pa roj carbon dub nrog cov khoom siv sib xws tuaj yeem khaws cia lossis siv sab nraum zoov rau 50 xyoo yam tsis muaj kev puas tsuaj los ntawm hluav taws xob ultraviolet.
6. Zoo hnav tsis kam: Kev sib piv ntawm kev hnav tsis kam ntawm HDPE yeeb nkab thiab steel yeeb nkab qhia tau hais tias hnav tsis kam ntawm HDPE yeeb nkab yog 4 npaug ntawm cov yeeb nkab steel. Hauv kev thauj mus los ntawm av nkos, piv nrog cov kav hlau, HDPE kav dej muaj qhov hnav zoo dua, uas txhais tau hais tias cov kav dej HDPE muaj kev pabcuam ntev dua thiab kev lag luam zoo dua.
7. Kev ua tau zoo: Kev hloov pauv ntawm HDPE yeeb nkab ua rau nws yooj yim rau khoov. Nyob rau hauv engineering, obstacles yuav bypassed los ntawm kev hloov cov kev taw qhia ntawm cov yeeb nkab. Muaj ntau zaus, qhov hloov pauv ntawm cov yeeb nkab tuaj yeem txo cov yeeb nkab fittings thiab cov nqi installation.
8. Kev tiv thaiv me me rau cov dej ntws: HDPE cov kav dej muaj qhov zoo nkauj sab hauv thiab lawv cov Manning coefficient yog 0.009. Qhov kev ua tau zoo thiab cov khoom tsis muaj nplaum ua kom ntseeg tau tias HDPE yeeb nkab muaj peev xwm ntau dua li cov kav dej ib txwm muaj, thiab tseem txo qis kev poob siab ntawm cov kav dej thiab lub zog siv dej xa khoom.
9. Ib qho yooj yim los tuav: HDPE kav yog sib dua li cov kav dej ua vaj tse, cov kav dej galvanized thiab cov kav hlau steel, nws yooj yim los tuav thiab txhim kho, thiab cov neeg ua haujlwm qis thiab cov khoom yuav tsum tau txhais hais tias tus nqi installation ntawm qhov project yog txo qis heev.
10. Ntau yam kev tsim kho tshiab: HDPE kav dej muaj ntau yam kev tsim kho. Ntxiv nrog rau cov txheej txheem excavation, ntau yam tshiab trenchless cov tswv yim xws li yeeb nkab jacking, directional drilling, hauv ob sab phlu yeeb nkab kuj siv tau. Qhov no yog tib txoj kev xaiv rau qee qhov chaw uas tsis muaj kev khawb av, yog li cov kav dej HDPE tau siv ntau dua.
