Polyethylene (PE) thiab polypropylene (PPR) cov kav dej yas yog ob txoj kev xaiv rau cov kav dej siv hauv tsev thiab cov tsev lag luam. Thaum lawv qhia qee qhov sib xws, lawv kuj muaj qhov sib txawv tseem ceeb thaum nws los txog rau lawv cov ntawv thov, cov khoom, thiab cov kev xav tau ntawm kev teeb tsa. Hauv tsab xov xwm no, peb yuav tham txog qhov sib txawv tseem ceeb ntawm PE yeeb nkab thiab PPR yeeb nkab thiab lawv qhov tsim nyog rau ntau yam kev siv kav dej.
PE yeeb nkab:
Cov kav dej PE yog tsim los ntawm txoj kev extrusion thiab yog ua los ntawm high-density polyethylene (HDPE). PE kav dej muaj kev cuam tshuam ntau dua li cov kav dej PPR thiab haum rau kev teeb tsa sab nraum zoov lossis hauv av, vim lawv tuaj yeem tiv taus huab cua hnyav thiab tiv thaiv kev puas tsuaj los ntawm av txav los yog dej siab.
Cov kav dej PE feem ntau yog siv rau kev siv dej, khoom siv roj, dej phwj tuaj, thiab cov kav dej. Lawv muaj nyob rau hauv ntau qhov ntau thiab tsawg thiab kev ntsuas siab, xws li PE32 txog PE100. PE kav dej muaj qhov chaw du uas txo cov kua dej sib txhuam thiab tiv taus qhov ntsuas thiab corrosion. Lawv kuj muaj qhov yooj yooj yim, cia lawv khoov yam tsis muaj kev tawg yooj yim.
PPR yeeb nkab:
PPR cov kav dej yog tsim los ntawm polypropylene thiab yog tsim los ntawm kev siv txoj kev vuam uas siv cov cua sov thiab siab los fuse cov yeeb nkab fittings. Cov kav dej PPR feem ntau yog siv rau cov dej txias thiab dej kub, cov cua sov hauv qab, thiab cov cua compressed thauj. Lawv muaj nyob rau hauv ntau qhov ntau thiab tsawg thiab kev ntsuas siab, feem ntau ntawm PN10 txog PN25.
PPR cov kav dej muaj qhov zoo nkauj sab hauv uas tiv thaiv kev scaling thiab yooj yim los ntxuav. Lawv muaj peev xwm tiv taus cua sov, tshuaj lom neeg corrosion, thiab siab, ua rau lawv zoo haum rau kev siv kub. PPR cov kav dej kuj hloov tau yooj yim, ua rau lawv yooj yim rau nruab rau hauv qhov chaw nruj.
Qhov sib txawv ntawm PE thiab PPR kav:
1. Qhov kub thiab txias:
PPR cov kav dej tuaj yeem tiv taus qhov kub txog li 100 degree, thaum PE kav dej tuaj yeem tuav txog 60 degree. Cov kav dej PPR yog, yog li ntawd, zoo dua rau cov dej kub, hos PE kav dej zoo dua rau cov dej txias.
2. Kev ntsuas siab:
PPR cov kav dej muaj qhov ntsuas siab dua li cov kav dej PE, uas txwv tsis pub lawv siv rau hauv cov ntawv thov siab xws li kev xa roj thiab cov kav dej.
3. Tshuaj tiv thaiv:
PPR cov kav dej muaj cov tshuaj tiv thaiv ntau dua li cov kav dej PE, uas ua rau lawv xaiv zoo dua rau kev siv tshuaj lom neeg thiab kev siv hauv kev lag luam.
4. Nqi:
Cov kav dej PE feem ntau pheej yig dua li cov kav dej PPR. Qhov no ua rau lawv muaj kev xaiv nrov rau kev siv qis qis xws li cov khoom siv dej.
Installation Requirements:
PE yeeb nkab:
PE yeeb nkab installation yuav tsum tau khawb ib lub trench thiab cov yeeb nkab yuav tsum tau muab tso rau hauv nws. Tom qab ntawd lub trench yog backfilled nrog av thiab compacted los npog cov yeeb nkab. Thaum tso cov kav dej PE, kev saib xyuas kom zoo yuav tsum tau ua kom ntseeg tau tias cov yeeb nkab tsis puas lossis kinked thaum lub sijhawm teeb tsa. PE kav yuav tsum tau tiv thaiv los ntawm raug UV teeb, uas yuav degrade cov khoom.
PPR yeeb nkab:
PPR yeeb nkab vuam yuav tsum muaj cov cuab yeej tshwj xeeb uas siv cov cua sov kom yaj cov yeeb nkab thiab fittings ua ke mus tas li. PPR cov kav dej yog ib qho yooj yim los txiav thiab tsis tas yuav muaj cov cuab yeej tshwj xeeb, uas ua rau lawv muaj kev xaiv nrov rau DIY installation. Txawm li cas los xij, kev txhim kho PPR cov kav dej yuav tsum muaj kev txawj tshwj xeeb thiab cov cuab yeej siv ntau dua, ua rau lawv raug nqi ntau dua rau cov kav dej PE.
Xaus:
Hauv kev xaus, ob qho tib si PE thiab PPR kav dej muaj lawv qhov tshwj xeeb zoo thiab qhov tsis zoo, uas ua rau lawv tsim nyog rau kev siv sib txawv. Cov kav dej PE yog qhov zoo dua rau cov ntawv thov uas tsis tshua muaj siab xws li cov kav dej, thaum PPR cov kav dej yog qhov tsim nyog rau cov ntawv thov uas yuav tsum muaj qhov kub thiab txias thiab kev ruaj ntseg tshuaj. Thaum txhim kho PE lossis PPR cov kav dej, nws yog ib qho tseem ceeb uas yuav tsum xav txog cov kev cai tshwj xeeb ntawm daim ntawv thov, qhov ntsuas siab, thiab ib puag ncig yam xws li UV raug, av txav, thiab kub hloov. Yog li ntawd, nws yog ib txwm pom zoo kom koj sab laj ib tus kws tshaj lij cov kav dej rau kev taw qhia ntawm hom yeeb nkab twg siv rau koj daim ntawv thov tshwj xeeb.
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