IFAN PPR cov kav dej yog nyob rau hauv kev tsim khoom thiab tab tom mus txog rau thaum xaus ntawm lub xyoo, thiab lawv tau thauj khoom hauv lub Hoobkas txhua hnub.
Ntxiv nrog rau cov yam ntxwv ntawm cov kav dej yas xws li lub teeb yuag, kev tiv thaiv corrosion, tsis muaj qhov ntsuas, thiab lub neej ua haujlwm ntev, PP-R kav kuj muaj cov yam ntxwv tseem ceeb hauv qab no:
1. Tsis muaj tshuaj lom thiab tu cev. Cov khoom siv raw khoom molecules ntawm PP-R tsuas yog cov pa roj carbon thiab hydrogen, thiab tsis muaj teeb meem thiab tshuaj lom. Nws yog huv thiab nyab xeeb. Nws tuaj yeem siv tsis tau tsuas yog rau cov kav dej txias thiab dej kub xwb, tab sis kuj tseem siv rau cov dej ntshiab huv.
2, txuag hluav taws xob thiab txuag hluav taws xob. Lub thermal conductivity ntawm PP-R yeeb nkab yog 0.21w/mk, uas tsuas yog 1/200 ntawm cov yeeb nkab steel.
3. Zoo tiv thaiv tshav kub. Vicat softening point ntawm PP-R yeeb nkab yog 131.5 degree. Qhov siab tshaj plaws ua haujlwm kub tuaj yeem ncav cuag 95 degree, uas tuaj yeem ua tau raws li qhov yuav tsum tau muaj ntawm cov dej kub hauv lub tsev dej thiab cov kav dej.
4. Lub neej ua haujlwm ntev. Kev pabcuam lub neej ntawm PP-R yeeb nkab tuaj yeem ncav cuag ntau dua 50 xyoo nyob rau hauv cov xwm txheej ntawm kev ua haujlwm kub 70 degree thiab ua haujlwm siab (PN) 1.0MPa; Kev pabcuam lub neej tuaj yeem ncav cuag ntau dua 100 xyoo hauv qhov kub thiab txias (20 degree).
5. Yooj yim rau nruab thiab txuas tau *. PP-R muaj kev vuam zoo. Cov kav dej thiab fittings tuaj yeem txuas nrog kub yaj thiab electrofusion. Nws yog ib qho yooj yim rau nruab, thiab cov pob qij txha muaj kev nyab xeeb. Lub zog ntawm qhov sib txuas yog ntau dua li lub zog ntawm cov yeeb nkab nws tus kheej.
6. Cov ntaub ntawv tuaj yeem siv dua. PP-R pov tseg yog ntxuav, tawg, thiab rov ua dua tshiab rau kev tsim cov kav dej thiab fittings. Tus nqi ntawm cov khoom siv rov ua dua tsis pub dhau 10 feem pua ntawm tag nrho cov nyiaj thiab tsis cuam tshuam rau cov khoom zoo.