1. Kev ua haujlwm zoo huv. Cov khoom siv raw ntawm cov yeeb nkab yog polyolefin, thiab nws cov lwg me tsuas yog muaj C thiab H cov ntsiab lus. Cov ntaub ntawv nyoos thiab ntu ua kom tau raws li tus qauv kev tu huv, thiab muaj kev tiv thaiv zoo corrosion. Lawv tsis muaj tshuaj lom rau txhua ions hauv dej thiab yuav tsis xeb.
2. Qhov raj dej tsis kam yog qhov me me. Lub puab sab hauv ntawm cov raj xa ncaj yog du thiab yuav tsis ntsuas. Kev txhuam kev txhuam ntawm txoj hau kev ua yog me dua qhov ntawm lub thawv hom yeeb nkab, qhov chaw sib tshooj ntawm cov yeeb nkab fittings tsis hloov thaum nws txuas, thiab hauv zos tiv thaiv cov coefficient me me rau cov yeeb nkab hlau.
3. Cov khib nyiab ntawm cov kav dej thiab qhov fittings tuaj yeem rov ua dua. Tom qab raug ntxuav thiab tawg, cov pov tseg tuaj yeem siv ncaj qha rau kev tsim cov kav dej thiab fittings; tsis muaj kev ua qias tuaj rau ib puag ncig thaum lub sij hawm tsim khoom thiab tsim cov txheej txheem. Nws yog rau cov xim tsev cov ntaub ntawv.
4. Kev txuag tshav kub thiab txuag hluav taws xob. Lub thermal conductivity ntawm PPR yeeb nkab cov khoom siv yog 0.21 W / (mK), uas tsuas yog 1/200 ntawm qhov ntawm cov kav hlau. Feem ntau, thaum kev tiv thaiv tshav kub xav tau rau cov kav dej kub, cov nyhuv ntawm txeej tshaj kev txuag thiab txuag lub zog yog pom tseeb; lub zog quab yuam tsim tawm thaum qhov kev hloov siab ntawm lub siab tseem me me, Haum rau kev faus ncaj qha thiab kev zais hauv cov phab ntsa thiab hauv pem teb.
5. Ua tsis tiav ntawm PPR cov kav dej: a. Qhov tsis yeem thiab qhov cuam tshuam tsis zoo yog qhov phem tshaj li cov kav hlau, yog li lawv tau yooj yim thaum lub sijhawm khaws cia, kev thauj mus los thiab kev tsim kho. b. Qhov coefficient ntawm linear nthuav dav ntawm PPR kav dej yog qhov loj, xws li ntawm 0.14 hli / (mK) txog 0.16 (mK). Cov xim dub yuav tsum siv. Cov kev ntsuas yuav tsum raug ntsuas los tiv thaiv kev txhim kho qhov raj xa dej thiab deformation thaum raug lossis tsis ncaj qha muab faus rau qhov txheej txheem tsaus ntuj.
6. Zoo tshav kub tsis kam thiab kev pab lub neej ntev. Kev ua haujlwm siab kub ntawm PPR cov khoom siv yeeb nkab tuaj yeem ncav cuag 95 ℃, thiab kev siv mus sij hawm ntev kub yog 70 ℃ qis dua 1.0MPa siab. Nws tuaj yeem ua tau raws li qhov siab siab siab tshaj ntawm cov dej kub. Raws li kev ua haujlwm ntawm PN1.0MPa, qhov kev pabcuam lub neej tuaj yeem ncav ntau dua 50 xyoo: kev pabcuam lub neej tuaj yeem ncav ntau dua 100 xyoo ntawm qhov kub tsis zoo.
7. Kev txhim kho yooj yim thiab txhim khu kev qha zoo. Cov khoom siv yeeb nkab tsis yog tsuas yog yooj yim hauv cov txheej txheem ntau lawm, cov khoom siv tsawg dua peev txheej, tab sis kuj pom kev hnyav. Qhov nyhav tsuas yog 1/9 ntawm cov yeeb nkab steel thiab 1/10 ntawm cov yeeb nkab steel ntshav, uas yuav txo tau kev tsim kho ntawm cov neeg ua haujlwm; vim tias cov khoom siv yeeb nkab yog ua los ntawm ntau cov ntaub ntawv raw. Nws muaj qhov ua haujlwm kub-yaj kom yooj yim, txhim kho yooj yim thiab txhim khu kev qha, thiab lub zog ntawm qhov kev sib txuas feem ntau dua li cov yeeb nkab ntoo lub cev.