1. Cov khoom siv sib txawv. Cov khoom siv ntawm cov yeeb nkab PVC yog ua los ntawm polyvinyl chloride, thiab PPR yog ua los ntawm copolymerized polypropylene, yog li cov tsos ntawm ob qhov sib txawv. PVC feem ntau yog mis nyuj dawb, thiab PPR tuaj yeem ntxiv lwm cov xim, yog li tig mus rau hauv cov yeeb yuj yeeb yuj kav.
2. phab ntsa thickness txawv. Yog hais tias lub cheeb ntawm PVC yog 6 hli, phab ntsa thickness feem ntau yog hais txog 2 hli. Yog hais tias txoj kab uas hla yog 8 ~ 10 hli, phab ntsa thickness feem ntau mus txog 2.5 hli. PPR yeeb nkab yog muab faib ua 4 kav thiab 6 kav, thiab phab ntsa thickness yog 2.3 hli thiab 3.5 hli, raws li. 3. Yog tias peb xav paub qhov txawv, nws tuaj yeem ua qhov txawv ntawm daim ntawv lo rau ntawm cov yeeb nkab, thiab nyob rau hauv tib txoj kab uas hla ntawm cov yeeb nkab, cov yeeb nkab phab ntsa ntawm cov yeeb nkab PPR yuav tsum tuab me ntsis.
3. tus nqi sib txawv. Qhov no yog vim tias lawv cov khoom siv thiab phab ntsa thickness sib txawv, yog li tus nqi tsim khoom thiab tus nqi kuj txawv. Hauv kev sib piv, tus nqi ntawm PPR yog siab dua.
4. Qhov sib txawv kawg yog qhov kev siv sib txawv vim qhov kev nyab xeeb thiab kev nyiam huv ntawm PVC tsis zoo li cov kav dej PPR. Kev txhim kho hauv tsev feem ntau xaiv PPR ua dej, thiab tseem tuaj yeem siv rau kev teeb tsa cov kav dej kub thiab txias. Cov kav dej PVC feem ntau yog siv los ua cov kav dej, thiab tsuas yog siv tau ua cov kav dej txias.
