IFANHoobkas 30+ xyoo tsim kev paub txog kev txhawb nqa xim / qhov loj me kev txhawb nqa dawb qauv.Zoo siab txais tos los tham rau catalog thiab kuaj dawb.Qhov no yog peb lub vev xaib Facebook:www.facebook.com, Nyem rau saib IFAN cov khoom lag luam video.Piv nrog cov khoom Tomex, peb cov khoom IFAN los ntawm qhov zoo rau tus nqi yog qhov koj xaiv zoo tshaj plaws, txais tos mus yuav!
Thaum nws los txog rau cov kav dej, kev xaiv cov kav dej yog qhov kev txiav txim siab tseem ceeb. PPR kav thiab PVC kav yog ob qho kev xaiv, tab sis qhov twg yog qhov zoo dua? Hauv blog no, peb yuav sib piv thiab txheeb xyuas cov kav dej PPR thiab cov kav dej PVC los pab koj txiav txim siab.
PPR (polypropylene random) cov kav dej yog tsim los ntawm cov khoom siv yas uas paub txog kev ruaj khov thiab kav ntev. Lawv tiv taus corrosion thiab tshuaj lom neeg, ua rau lawv zoo tagnrho rau kev thauj cov dej kub thiab txias. PPR cov kav dej kuj tseem muaj qhov zoo nkauj sab hauv, uas ua rau muaj kev sib txhuam tsawg dua thiab siv zog qis dua.
Ntawm qhov tod tes, PVC (polyvinyl chloride) cov kav dej yog tsim los ntawm cov khoom siv hluavtaws uas nrov hauv kev tsim kho kev lag luam. Lawv yog cov hnyav, yooj yim rau nruab, thiab raug nqi. PVC cov kav dej kuj tseem tsis muaj dej tsis zoo thiab tiv taus cov tshuaj, ua rau lawv xaiv rau cov kua dej thiab cov pov tseg pov tseg.
Thaum nws los txog rau qhov kub thiab txias, cov kav dej PPR tuaj yeem tiv taus qhov kub siab dua li cov kav dej PVC. PPR kav dej tuaj yeem tswj tau qhov kub txog li 95 degree, thaum PVC kav tsuas tuaj yeem tswj qhov kub txog li 60 degree. PPR cov kav dej kuj tseem tiv taus qhov cuam tshuam thiab siab, ua rau lawv zoo tagnrho rau kev lag luam thiab kev siv hnyav.
Txawm li cas los xij, cov kav dej PVC yog hloov tau ntau dua li cov kav dej PPR thiab yog li yooj yim rau nruab rau hauv qhov chaw kaw. PVC kav kuj muaj lub zog tensile ntau dua, uas txhais tau tias lawv tuaj yeem tiv taus ntau dua rub tawm yam tsis muaj kev tawg.
Hais txog kev ua haujlwm ntev, PPR kav dej muaj lub neej ntev dua li cov kav dej PVC. Cov kav dej PPR tuaj yeem kav ntev txog 50 xyoo, thaum cov kav dej PVC muaj lub neej ntev ntawm 25 txog 40 xyoo. PPR cov kav dej kuj tseem muaj kev pheej hmoo tsawg dua ntawm kev tawg lossis tawg, uas tuaj yeem ua rau cov dej puas tsuaj thiab raug nqi kho.
Hauv kev xaus, ob qho tib si PPR kav thiab PVC kav muaj lawv tus kheej zoo thiab qhov tsis zoo. PPR cov kav dej muaj qhov ruaj khov dua, tiv taus qhov kub thiab txias thiab tshuaj lom neeg, thiab muaj qhov zoo nkauj sab hauv uas ua rau muaj kev sib txhuam tsawg thiab kev siv hluav taws xob tsawg. PVC kav yog lub teeb yuag, yooj yim rau nruab, raug nqi, thiab muaj zog tensile ntau dua. Thaum kawg, kev xaiv ntawm cov kav dej PPR thiab cov kav dej PVC nyob ntawm koj qhov kev xav tau tshwj xeeb thiab cov peev nyiaj.