PPR - Ntev ntev npaum li PP-R dej & fittings yog cov khoom siv feem xyuam nrog cov kav dej thiab cov khoom siv dej, vim tias lawv cov yeeb tshuaj thiab kev siv fusion vuam, uas ua kom lub kav dej kom muaj kev ruaj khov zoo. Nws tuaj yeem siv tau ob qho tib si raws li cov dej txias los yog cov kav dej kub.
CPVC - CPVC yog ib lub thermoplastic ua ntawm chlorination ntawm polyvinyl chloride cob. Nws tiv taus degradation thiab muab kev pab ua haujlwm ntev. Qhov tseeb, thawj kav tshuab siv CPVC tshwm sim hauv 1959, thiab lawv tseem ua haujlwm tsis muaj teeb meem.
Qhov loj ntawm qhov ob yog qhov kub txhua yam tuaj yeem ua tau. Thaum lub caij CPVC siv tau 200 ° Fahrenheit, PVC tuaj yeem tuav 140 ° Fahrenheit.
Lwm qhov txawv ntawm ob yog raws li nram no:
CPVC
PVC yog npau taws, xim grey, lossis daj.
Feem ntau haum rau kev siv kev lag luam, dej kub faib.
PPR
· PPR yog dawb, ntsuab thiab grey
· Tus nqi zoo thiab tus phooj ywg zoo
