Kev hnav zoo: Kev sib piv ntawm kev hnav tsis kam ntawm HDPE cov yeeb nkab thiab cov yeeb nkab steel qhia tau hais tias qhov hnav tsis kam ntawm HDPE cov yeeb nkab yog 4 npaug ntawm cov yeeb nkab steel. Nyob rau hauv lub tshav pob ntawm cov av nkos, HDPE cov kav dej muaj qhov hnav zoo dua li cov kav dej steel, uas txhais tau hais tias HDPE cov kav dej muaj kev pabcuam ntev dua thiab kev lag luam zoo dua; Kev yooj yim zoo: Kev hloov pauv ntawm HDPE cov kav dej ua rau nws yooj yim rau khoov. Hauv engineering, obstacles tuaj yeem hla dhau los ntawm kev hloov cov kev taw qhia ntawm cov yeeb nkab. Feem ntau, qhov hloov pauv ntawm cov kav dej tuaj yeem txo tus naj npawb ntawm cov fittings thiab txo cov nqi installation.
