a. Muaj zog corrosion kuj: Piv nrog rau cov kav hlau cam khwb cia zoo tib yam thiab cov kav dej galvanized, PVC kav muaj zog corrosion kuj, muaj zog acid thiab alkali tsis kam, thiab yuav tsis xeb thiab nplai. Tsis tas yuav txhawj xeeb txog qhov tshwm sim ntawm "dej liab" thaum siv nws.
b. Cov kua dej me me: Sab hauv phab ntsa ntawm cov yeeb nkab PVC yog du heev. Nws qhov roughness coefficient tsuas yog 0.009, cov dej tsis kam yog tsawg heev, thiab cov dej siab yuav tsis txo qis heev.
c. Lub zog txhua yam muaj zog: UPVC kav dej rau cov khoom siv dej muaj cov dej tsis zoo, kev cuam tshuam thiab tensile lub zog, thiab tuaj yeem tiv taus 110 cua rau 1 teev ntawm chav tsev kub yam tsis muaj kev tawg.
d. Kev huv huv thiab tsis muaj tshuaj lom: UPVC kav dej rau cov dej siv ib qho tshwj xeeb ntsuab tsis muaj hmoov lead-dawb cov qauv siv los ntawm cov tshuaj siv lead ua ntsev formula, yog li nws yuav tsis ua rau cov dej tsis zoo thiab cuam tshuam rau tib neeg kev noj qab haus huv.
e. Lub teeb kev ntxhib los mos, yooj yim installation thiab kev tsim kho: Qhov ntom ntawm PVC yeeb nkab yog ib feem tsib ntawm cov hlau cam khwb cia zoo tib yam, thiab nws yooj yim rau kev thauj thiab tshem tawm. Thiab siv cov nplaum tshwj xeeb muab tshuaj txhuam los yog lub tes tsho elastic, kev teeb tsa thiab kev tsim kho yog yooj yim thiab ceev.
f. Kev ua haujlwm kub ntawm cov kav dej: Qhov ntsuas kub ntawm UPVC kav dej yog qhov zoo tshaj plaws ntawm chav tsev kub. Yog tias qhov ntsuas kub tsawg dhau, qhov brittleness yuav nce, uas yog qhov tsis zoo rau kev teeb tsa thiab kev tsim kho; Yog tias qhov kub thiab txias dhau lawm, lub zog tensile yuav txo qis, thiab cov dej siab tsis kam yuav txo.
g. Cov dej zoo nruj: 15 feeb tom qab cov nplaum sib txuas, lub zog sib txuas tuaj yeem ncav cuag ntau dua 12.5 / C, thiab nws yuav tsis txo qis tom qab siv ntau xyoo. Lub neej kev pab cuam yog ntev heev, thiab tsis muaj kev txhawj xeeb ntawm kev laus thiab dej to.