Cov kav dej PE feem ntau muab faib ua ob hom kev tsim kho: kev tsim kho qhov chaw thiab tsis muaj kev tsim kho hauv cov dej hauv nroog thiab cov dej ntws. Niaj hnub no, PE yeeb nkab manufacturers feem
Peb hom kav dej: PE yeeb nkab, PVC yeeb nkab thiab PPR yeeb nkab yog cov kav dej ntau tshaj plaws hauv cov yeeb nkab lag luam, tab sis ntau tus neeg tsis paub qhov txawv ntawm peb cov kav dej no, yog
Yuav ua li cas yog lub hauv paus ntsiab lus uas PPR kav yuav tsum tau ntsia luv luv es tsis ntev, ncaj es tsis nkhaus? Nyob rau hauv cov txheej txheem ntawm kev txhim kho hauv tsev, thaum txhim kho co
PE yeeb nkab thiab PPR yeeb nkab yog ob yam khoom siv rau cov kav dej, thiab ob qho tib si siv tau rau cov dej. Yog li vim li cas cov kav dej txhim kho hauv tsev feem ntau xaiv PPR cov kav dej, thaum
PPR dej yeeb nkab muaj cov yam ntxwv nram qab no: kev tiv thaiv corrosion, kev ua haujlwm ntev, kev txuag hluav taws xob thiab cov khoom siv txuag, lub teeb yuag thiab lub zog siab, kev tiv thaiv ib p
Tam sim no, 90 feem pua ntawm cov tsev neeg siv PPR kav dej thiab hluav taws xob kho kom zoo nkauj, tab sis ntau tus tswv tsis paub tias cov kav dej PPR tau muab faib ua cov kav dej kub thiab dej
Niaj hnub no, cov neeg siv khoom feem ntau xaiv siv cov kav dej PPR thaum kho lawv lub tsev. Txawm li cas los xij, muaj ntau hom PPR kav muag hauv khw muag khoom. Tsis tsuas yog lawv sib txawv ntawm c
Qhov no yog vim qhov sib txawv PPR hais ntawm raw khoom. Yog li ntawd, Anhua dej yeeb nkab yog dawb thiab dawb npauj npaim yog grey, uas tsis sawv cev rau qib zoo ntawm cov khoom.
Kev siv hluav taws xob ntau lawm ntawm lub zog{{0}}Txuag PPR yeeb nkab tsuas yog 20 feem pua ntawm cov yeeb nkab steel, thiab nws cov thermal conductivity tsawg 0.2W / (mk), uas tsuas yog 1 / 200
Kev sib txuas ntawm cov khoom yas siv cov khoom yas ntawm cov yeeb nkab fittings (cov yeeb nkab fittings tau muab faib ua tooj liab thiab cov khoom yas). Thaum cov khoom yas txuas nrog, lawv feem ntau
Kev tu cev zoo. Cov khoom siv raw ntawm cov kav dej belongs rau polyolefin, thiab nws cov molecules tsuas yog tsim los ntawm C thiab H ntsiab lus. Cov khoom siv raw thiab cov khoom siv tau ua tiav raw