Cov khoom siv raw ntawm PPH raj tsuas muaj cov pa roj carbon thiab hydrogen nkaus xwb, thiab tsis muaj lwm yam teeb meem lossis tshuaj lom, yog li nws muaj kev nyiam huv thiab txhim khu kev qha. Cov khoom siv tshwj xeeb ntawm cov yeeb nkab zoo li no, kev ua haujlwm siab ntawm cov yeeb nkab polyethylene, tau tsim sai heev nyob rau hauv xyoo tas los no, uas tau pom tseeb txhim kho nws qhov zoo hauv kev siv thiab nthuav nws cov nplais siv; Cov tsos ntawm cov khoom siv yuav tsum tau ua raws li cov hauv qab no: qhov kawg nto yog perpendicular mus rau axis ntawm cov yeeb nkab; cov yeeb nkab fittings tiav, Tsis muaj qhov tsis xws luag, tsis muaj deformation; cov phab ntsa sab hauv thiab sab nrauv ntawm cov kav dej thiab cov yeeb nkab fittings yog du thiab tiaj, tsis muaj npuas, tawg, tev, thiab pom tseeb cov cim thiab kev nyuaj siab, thiab cov xim yog qhov pib zoo ib yam.
PPH duct muaj qhov zoo analytical chemistry credibility, nws tuaj yeem corroded los ntawm sulfuric acid thiab concentrated sulfuric acid, thiab nws ruaj khov rau ntau yam tshuaj. Cov ntsiab lus qis ntawm aliphatic hydrocarbons, aliphatic hydrocarbons thiab isopropyl titanate hydrocarbons yuav loosen thiab yaj polypropylene. Raws li cov khoom siv lead ua loj zuj zus, nws cov chemistry analytical credibility kuj nce. Polypropylene yog tsim rau kev tsim khoom ntawm ntau yam chemical pipelines thiab qhov chaw, thiab qhov xav tau los tiv thaiv corrosion yog qhov zoo. Cov kav dej yas dav dav muaj qhov zoo ntawm lub teeb yuag, tiv thaiv corrosion, thiab tsis-scaling. PPH cov kav dej kuj muaj cov yam ntxwv tsis muaj tshuaj lom thiab tu cev.
