Cov kav dej yas feem ntau yog tsim los ntawm cov khoom siv hluavtaws, tshwj xeeb yog polyester, nrog rau kev sib ntxiv ntawm stabilizers, lubricants, thiab plasticizers, los ntawm extrusion processing hauv cov yeeb nkab- ua tshuab siv "yas" txoj kev.
Nrog nce kev ua neej nyob, nce kev paub txog ib puag ncig, thiab kev tsom mus rau kev noj qab haus huv ntau dua, kev hloov pauv ntsuab tau cuam tshuam los ntawm kev lag luam khoom siv hauv tsev, tshwj xeeb tshaj yog hauv cov dej thiab cov dej ntws. Cov ntaub ntawv soj ntsuam xyuas dej dav dav qhia tau tias cov kav dej txias -galvanized steel feem ntau xeb nyob rau hauv tsib xyoos, pom muaj cov ntxhiab tsw zoo heev. Qhov no tau ua rau ntau qhov kev tsis txaus siab los ntawm cov neeg nyob hauv mus rau tsoomfwv cov chaw haujlwm, tsim teeb meem kev sib raug zoo. Muab piv rau cov kav hlau ib txwm siv, cov kav dej yas muaj qhov zoo xws li qhov hnyav dua, kev tiv thaiv corrosion, kev kub siab ua haujlwm, kev tu cev thiab kev nyab xeeb, tsis tshua muaj dej tsis kam, kev txuag hluav taws xob, kev txuag hlau, txhim kho kev nyob ib puag ncig, kev pab lub neej ntev, thiab kev txhim kho yooj yim dua. Cov txiaj ntsig zoo no tau ua rau lawv nrov hauv kev lag luam pipeline engineering, ua kom muaj txoj haujlwm tseem ceeb thiab tsim kom muaj kev txhim kho tsis tu ncua.
