1. Muab piv nrog cov kav hlau hlau, PPR kav dej muaj qhov hardness qis dua thiab tsis zoo rigidity. Lawv yuav tsum tau tiv thaiv thaum tuav thiab kev tsim kho kom tsis txhob muaj kev puas tsuaj los ntawm kev siv dag zog sab nraud. Qhov chaw ntawm lub raj xa dej yuav tsum raug cim tom qab daim ntawv thov tsaus, kom tsis txhob muaj kev puas tsuaj rau cov kav dej vim qhov kev kho kom zoo nkauj thib ob.
2. PPR yeeb nkab muaj qee qhov kub thiab txias brittleness hauv qab 5 degree. Ceev faj thaum lub caij ntuj no kev tsim kho. Thaum txiav cov yeeb nkab, siv rab riam ntse los txiav nws maj mam. Tsis txhob nias lossis khob lub raj xa dej, thiab npog cov khoom uas raug rau sab nraud nrog cov khoom siv tiv thaiv yog tias tsim nyog.
3. PPR raj yog yooj yim rau hnub nyoog thiab degrade thaum raug ultraviolet rays ntev. Nws yuav tsum tau muab qhwv nrog ib txheej tiv thaiv tsaus ntuj thaum nws ntsia sab nraum zoov lossis hauv tshav ntuj ncaj qha.
4. PPR yeeb nkab yuav tsum tau txuas nrog kub-melt kev twb kev txuas tshwj tsis yog tias nws txuas nrog cov kav hlau lossis cov khoom siv dej los ntawm kev sib txuas ntawm cov khoom siv xws li threaded inserts lossis flanges, kom cov kav dej sib xyaw ua ke thiab tsis muaj qhov to.
5. Lub linear expansion coefficient ntawm PPR yeeb nkab yog qhov loj (0.15mm / m degree), thiab kev ntsuas kev tiv thaiv kev nthuav dav thiab deformation ntawm cov yeeb nkab yuav tsum tau ua thaum cov yeeb nkab tau teeb tsa hauv qhov chaw lossis tsis ncaj faus.
6. Tom qab cov yeeb nkab tau teeb tsa, lub siab yuav tsum tau kuaj ua ntej muab cov yeeb nkab thiab npog cov txheej txheem zoo nkauj. Kev ntsuas siab ntawm cov kav dej txias yog 1.5 npaug ntawm kev ua haujlwm siab ntawm lub cev, tab sis tsis pub tsawg dua 1MPa; qhov kev ntsuas siab ntawm cov kav dej kub yog 2 npaug ntawm kev ua haujlwm siab, tab sis tsis tsawg dua 1.5MPa. Lub sij hawm ntsuas lub siab thiab cov txheej txheem tau teev tseg hauv cov txheej txheem