PPR kav thiab fittings muaj qis hardness thiab rigidity piv rau cov kav hlau; Yog li ntawd, lawv yuav tsum tau tiv thaiv thaum tuav thiab kev teeb tsa kom tsis txhob muaj kev puas tsuaj los ntawm cov khoom siv sab nraud. Tom qab zais kev teeb tsa, qhov tseeb qhov chaw ntawm cov kav dej yuav tsum tau kos kom meej meej kom tsis txhob muaj kev puas tsuaj thaum lub sij hawm tom qab kho dua tshiab.
PPR cov kav dej thiab fittings pom muaj qee qhov qis - qhov kub thiab txias ntawm qhov kub hauv qab 5℃; yog li ntawd, yuav tsum tau ceev faj ntxiv thaum lub caij ntuj no tsim. Thaum txiav cov kav dej, cov cuab yeej ntse yuav tsum tau siv los ua kom qeeb, tsis tu ncua. Cov kav dej txuas yuav tsum tsis txhob raug hnyav los yog cuam tshuam; Thaum tsim nyog, kev tiv thaiv npog yuav tsum tau siv rau cov ntu ntawm cov yeeb nkab uas tsis muaj zog rau sab nraud.
PPR cov kav dej thiab fittings yog qhov yooj yim rau kev laus thiab degradation thaum raug ultraviolet (UV) hluav taws xob dhau lub sijhawm ntev. Yog li ntawd, thaum ntsia sab nraum zoov lossis hauv qhov chaw raug tshav ntuj ncaj qha, lawv yuav tsum tau muab qhwv rau hauv qhov tsaus ntuj - cov xim tiv thaiv.
Tsuas yog kev sib txuas rau cov kav hlau lossis dej - siv cov khoom siv- uas siv cov txheej txheem xws li threaded inserts los yog flanges -tag nrho lwm yam kev sib txuas nrog PPR kav thiab fittings yuav tsum tau ua los ntawm thermal fusion bonding. Cov txheej txheem no ua kom cov kav dej tsim ib qho seamless, ib chav tsev, yog li tshem tawm cov ntsiab lus xau.
PPR kav thiab fittings muaj ib tug coefficient ntawm linear thermal expansion (0.15 hli / m· degree). Yog li ntawd, thaum txhim kho cov kav dej los ntawm kev nthuav tawm los yog zais routing uas tsis ncaj qha faus (xws li, hauv cov phab ntsa lossis qab nthab), cov kev ntsuas tshwj xeeb yuav tsum tau ua los tiv thaiv cov yeeb nkab nthuav dav thiab deformation.
Tom qab kev teeb tsa ntawm PPR kav thiab fittings, kev ntsuas siab yuav tsum tau ua ua ntej rov qab ua dua (rau kev faus ncaj qha) lossis siv cov khoom siv dai kom zoo nkauj (rau kev zais, tsis yog - faus kev teeb tsa). Rau cov kav dej txias, qhov ntsuas siab yuav tsum yog 1.5 npaug ntawm qhov system ua haujlwm siab, tab sis tsis muaj tsawg dua 1.0 MPa. Rau cov kav dej kub, qhov ntsuas siab yuav tsum yog 2.0 npaug ntawm kev ua haujlwm siab, tab sis tsis muaj tsawg dua 1.5 MPa. Lub sijhawm tshwj xeeb thiab cov txheej txheem rau cov kev ntsuas siab no yuav tsum ua raws li cov cai tswjfwm ntsig txog.