Feem ntau, ppr cov kav dej txias tsis tuaj yeem siv los ua cov kav dej kub.
1. Cov khoom siv ntawm cov kav dej kub thiab dej txias yog tib yam, tab sis cov phab ntsa tuab ntawm cov kav dej kub thiab dej txias ntawm tib txoj kab uas hla yuav txawv ntau, uas cuam tshuam ncaj qha rau nws lub peev xwm siab. Kev siv hloov pauv ua rau muaj kev phom sij zais.
2. Yog tias cov yeeb nkab dej txias uas koj siv yog qhov zoo ntawm cov kabmob siab zoo, nws tseem tuaj yeem ua rau siab tshaj S4 (1.6 MPa) qib.
3. PPR cov kav dej yog nyob rau hauv tib theem, thiab qhov zoo thiab qhov ntsuas ntawm cov kav dej kub zoo dua li cov kav dej txias. Yog tias cov kav dej txias tsis txaus, nws tuaj yeem txhim kho cov kav dej kub hloov. Tab sis cov kav dej kub tsis tuaj yeem hloov tau los ntawm cov kav dej txias. Ib yam li cov yeeb nkab dej kub tuaj yeem tiv taus cov thermal expansion thiab contraction zog ntawm cov dej kub, tab sis cov yeeb nkab dej txias tsis xav txog qhov thermal expansion thiab contraction kev ua tau zoo ntawm cov dej kub thaum lub sij hawm tsim khoom, yog li cov kav dej kub tuaj yeem hloov cov dej txias. cov yeeb nkab, tab sis cov kav dej txias tsis tuaj yeem hloov cov dej kub. Tube.
PPR dej yeeb nkab hais txog kev taw qhia:
1. PPR yog cov ntawv luv ntawm lus Askiv random copolymer polypropylene (Polypropylene-Random). Feem ntau hu ua peb hom polypropylene.
2. PPR yeeb nkab yog cov khoom siv hloov khoom ntawm cov yeeb nkab galvanized, UPVC cov kav dej, cov yeeb nkab yas aluminium, PE yeeb nkab, PE-X yeeb nkab thiab PE-RT yeeb nkab. Vim tias nws siv thev naus laus zis thev naus laus zis thev naus laus zis, lub zog thiab kub tsis kam ntawm polypropylene tau lees paub zoo, yog li ua lub zog tseem ceeb ntawm cov khoom siv yeeb nkab dej.
3. PPR cov kav dej yog siv dav hauv kev tsim cov dej thiab cov dej ntws, cov dej hauv nroog thiab cov neeg nyob deb nroog thiab cov dej ntws, cov pa hauv nroog, hluav taws xob thiab kho qhov muag cable sheathing, kev thauj mus los hauv dej, kev ua liaj ua teb irrigation thiab lwm yam kev tsim kho, hauv nroog, kev lag luam thiab kev ua liaj ua teb.
