Tuam Tshoj txoj kev tshawb fawb ntawm PVC yas nplaim retardant tshuab feem ntau muaj kev nyiam me ntsis, ib leeg nrhiav kev txhim kho cov pa ntsuas pa, tsis quav ntsej cov kev tshawb fawb ntawm cov pa luam yeeb. Cov ntaub ntawv pov thawj qhia tias 79 feem pua ntawm cov hluav taws kub yog tshwm sim los ntawm cov pa taws. Qee cov UPVC kav dej muaj qhov ntsuas pa oxygen ntau dua 50 feem pua, tab sis lawv tawm ntau cov pa taws thaum hlawv, thiab Vicat kub tsuas yog nyob nruab nrab ntawm 70 degree thiab 90 degree. Yog li ntawd, txawm hais tias UPVC kav dej yog incombustible, lawv tau yooj yim softened thiab deformed, thiab cov pa luam yeeb tsw muaj zog heev. Hauv hluav taws, ntawm ib sab, cov pa taws tuag yog tsim. Ib lub raj xa dej los yog lub qhov cua khiav los ntawm lub ru tsev nrog cua nrawm dua yuav kis hluav taws sai dua. Yog li ntawd, seb UPVC cov kav dej tuaj yeem siv rau hauv cov tsev siab siab tau yog qhov kev sib cav, thiab qhov tseem ceeb ntawm kev sib cav yog nws qhov hluav taws kub.
UPVC cov kav dej tau siv dav hauv cov tsev siab siab, tab sis tsis txaus siab tau them rau cov teeb meem tiv thaiv hluav taws saum toj no, thiab tsis muaj kev xav tau hais txog kev teeb tsa UPVC kav hauv qhov tshwj xeeb txais kev tiv thaiv hluav taws. Vim tias tam sim no "Code for Design of Building Fire Protection" GB 50016-2014, "Rigid PVC Pipe for Building Drainage" GB/T5836. Cov kev cai ntshiab ntawm kev siv cov kav dej UPVC ua rau qhov teeb meem no "tsis ncaj ncees". Thaum hu rau kev tshaj tawm cov ntaub ntawv tseem ceeb hauv lub tebchaws thiab cov kev cai, qee qhov kev xav tau muab tso rau hauv cov npoj yaig siv: (1) Cov nag, dej phwj tuaj thiab qhov cua nkag yuav tsum tau nruab rau ntawm phab ntsa sab nrauv ntawm lub tsev kom ntau li ntau tau. (2) Thaum cov nag, dej phwj tuaj thiab qhov cua nkag mus rau hauv lub tsev, lawv yuav tsum tau nruab rau hauv cov kav dej kom zoo, lossis tiv thaiv los ntawm cov khoom siv tsis zoo xws li cib thiab pob zeb ua vaj tse. (3) Rau cov ceg kav dej tawm mus rau hauv cov kav dej ntws, siv cov kav dej hlau, lossis siv cov kev tiv thaiv hluav taws nruj rau cov kav dej, xws li steel casings, inorganic fireproof casings, thiab lwm yam. (4) Cov fittings rau cov kav dej yuav tsum yog. ua los ntawm cov khoom hlau ntau li ntau tau.
kuj. Hauv kev siv UPVC cov kav dej, tseem muaj teeb meem xws li lub zog dissipation ntawm risers, txo suab nrov thiab kev tiv thaiv ntawm condensation, tag nrho cov txwv kev nce qib thiab siv cov UPVC cov kav dej uas twb muaj lawm rau qee yam.