1. Txheeb xyuas qhov zoo ntawm cov kav dej PPR: cov kav dej PPR tiag tiag yuav tsum ua raws li tus qauv ISO / DIS 15874.2-1999<>< plastic="" piping="" system="" for="" cold="" and="" hot="" water="" -="" ppr="" part="" ii="" pipes=""> >Cov yeeb nkab fittings yuav tsum ua raws li tus qauv ISO / DIS 15874.2-1999<>< plastic="" piping="" system="" for="" cold="" and="" hot="" water="" -="" ppr="" part="" iii="" pipe="" fittings=""> >; Kev ua tau zoo ntawm pseudo PPR kav thiab fittings tsis tuaj yeem dhau cov qauv saum toj no. Nws yuav tsum tau muab sau tseg tias lub neej kev pab cuam ntawm pseudo PPR hlab tsuas yog 1-5 xyoo, thaum lub neej kev pab cuam ntawm tiag tiag PPR hlab yog ntau tshaj 50 xyoo.
2. Ua tib zoo saib xyuas qhov kev txiav txim siab ntawm tag nrho cov kev pabcuam C (piv txwv li kev nyab xeeb) ntawm PPR pipeline:
For general occasions, and keep the temperature ＜ 70 degree for a long time, C = 1.25 can be selected; In important occasions, with long-term continuous service temperature Greater than or equal to 70 degree , and it is possible to operate at higher temperature for a long time, optional C = 1.5;
3. Rau cov dej txias (tsawg dua lossis sib npaug ntawm 40 degree), p.n1 yog xaiv 0 1.6Mpa kav thiab fittings;
Rau cov dej kub, xaiv ntau dua lossis sib npaug rau pN2 0mpa kav thiab fittings.
