Raws li thaum ntxov nyob rau hauv lub xyoo pua xeem, cov yeeb nkab yas tau dav siv nyob rau hauv lub ntiaj teb no lub zej lub zos, tshwj xeeb tshaj yog nyob rau hauv lub nineties ntawm lub xyoo pua xeem, kev loj hlob sai ntawm cov yas yeeb nkab lag luam. Cov yeeb nkab yas yog nyiam los ntawm nws tus kheej zoo, feem ntau, cov yeeb nkab yas tshiab muaj qhov zoo hauv qab no.
Ua ntej, cov yeeb nkab yas tshiab dej tsis kam yog me me, cov yeeb nkab yas tshiab dua li lwm cov kav dej, cov phab ntsa sab hauv yog du, tsis yooj yim rau scale, yog li kev sib txhuam ntawm cov dej ntws thiab cov yeeb nkab yog me me, yog li cov dej tsis kam. ntws yog me me, tsim nyog rau cov dej thiab cov dej ntws. Qhov thib ob, cov yeeb nkab yas tshiab yog sib zog dua lwm cov kav dej, thiab kev sib txuas yog yooj yim rau nruab rau hauv ntau txoj kev, uas tuaj yeem txais lub zog ntau dua ntawm cov dej ntws. Thib peb, cov yeeb nkab yas tshiab yog pheej yig dua li lwm cov kav dej, uas tuaj yeem txuag tau nqi ntau dua. Plaub, cov yeeb nkab yas tshiab yog ib puag ncig zoo, muaj zog corrosion kuj. Cov khoom siv hlau ntev nyob rau hauv qhov kev txiav txim ntawm cov dej ntws yuav raug oxidised los ntawm cov oxides hauv dej, cov dej zoo feem ntau yuav kis tau, cov kav dej yuav maj mam corroded thiab ua xoob, thiab thaum kawg poob kev ua tau zoo. Cov yeeb nkab yas tsis yooj yim rau corrode, yog li nws yuav tsis ua rau dej paug.
Daim ntawv thov ntawm ntau cov kav dej yas yog raws li hauv qab no: (1) rigid polyvinyl chloride yeeb nkab (UPVC) yog cov kav dej yas siv ntau tshaj plaws hauv cov kav dej thiab cov kav dej, UPVC corrosion kuj, zoo yoog raws, huv si thiab tsis muaj tshuaj lom, feem ntau yog siv rau hauv nroog. cov kav dej thiab cov kav dej thiab lwm cov kav dej hauv tsev thiab cov kav dej; (2) aluminium-yas composite yeeb nkab (PAP) yog cov yeeb nkab sib xyaw, nyob rau hauv nruab nrab ntawm cov yeeb nkab txhuas ua lub luag haujlwm ua lub cev pob txha, sab hauv thiab sab nraud ntawm polyethylene (PE) yas, PAP, PAP, PAP yog cov yeeb nkab sib xyaw, nyob rau hauv nruab nrab ntawm cov yeeb nkab aluminium, sab hauv thiab sab nraud ntawm polyethylene (PE) yas, PAP, PAP, PAP, PAP. PE yas, PAP muaj qhov zoo ntawm kev txuag hluav taws xob, txhim kho lub tsev ib puag ncig, txo qhov hnyav ntawm lub tsev, kev tsim kho yooj yim, thiab lwm yam, feem ntau yog siv hauv cov kav dej kub thiab dej txias hauv tsev; (3) iav fiber reinforced yas nrog xuab zeb yeeb nkab (RPM) yog ib tug saj zawg zog uas tsis yog-metallic composite yeeb nkab, feem ntau yog ua los ntawm cob, iav fibers, quartz xuab zeb curing thiab ua, muaj qhov zoo ntawm lub teeb yuag, siab zog, corrosion kuj, thiab lwm yam. , feem ntau yog siv nyob rau hauv loj-calibre cov dej hauv nroog thiab cov kav dej thiab cov kav dej phwj tuaj; (4) polyethylene (PE) yeeb nkab yuav muab faib ua high, nruab nrab thiab tsawg ntom polyethylene yeeb nkab raws li qhov ceev, tsawg-density PE saj zawg zog, cuam tshuam tsis kam yog superior, feem ntau yog siv rau kev ua liaj ua teb dej thiab irrigation, siab thiab nruab nrab-density PE. Feem ntau yog siv rau cov kav dej hauv tsev thiab sab nraum zoov; (5) crosslinked polyethylene yeeb nkab (PE-X) me me calibre, feem ntau yog siv rau sab hauv tsev dej kub thiab dej txias; (6) acrylonitrile-butadiene-styrene (ABS) Yas yeeb nkab corrosion kuj, kub tsis kam, thiab ntau yam kub, tus nqi siab, feem ntau yog siv los tiv thaiv corrosion pipeline; (7) steel-yas composite yeeb nkab (SP) ob qho tib si lub zog ntawm cov yeeb nkab hlau thiab yas yeeb nkab corrosion kuj, feem ntau yog siv hauv cov kav dej.
