Vim li cas PPR yeeb nkab fittings thiaj kub?
PPR dab tsi yog qee yam ntawm cov yeeb yam hauv cov kav dej hauv ntxiv rau kev ua kom huv, tsis muaj kev tiv thaiv thiab tsis muaj kev tiv thaiv? PPR dej dej xa cov dej tshiab rau lub tsev tsim dej tshiab cov yeeb nkab yeeb nkab, cov yeeb nkab tsis ua haujlwm me me thiab yuav tsis ntsuas; qhov kub ib puag ncig yog 20 degree, qhov ceev yog 0.89g / cm3 ~ 0.91g / cm3, qhov nyhav tsuas yog 1/9 ntawm cov yeeb nkab, tooj liab tooj ntawm 1/10, vim yog lub teeb yuag, tuaj yeem txo lub zog ntawm cov neeg ua haujlwm tsim; thiab kub thooj siab ntawm PPR cov yeeb nkab zoo: thaum kub siab kub hnyiab tau txog 95 degrees, siv ntev, thaum lub siab ua hauj lwm siab tshaj 1.0MPa, qhov dej kub tuaj yeem ncav 70 degrees, tuaj yeem ua tau raws li kev xav tau ntawm lub neej thiab kev tsim khoom ntawm cov dej kub, cov dej kub xa dej yog ib hom kev zoo tagnrho.
Dab tsi lwm cov nta koj xav tias PPR, yeeb nkab, fittings muaj?
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