1, Qhov sib txawv ntawm PE dej yeeb nkab thiab PPR dej yeeb nkab hauv kev huv
PE cov yeeb nkab dej thiab PPR cov yeeb nkab dej yuav luag tib yam ntawm kev noj qab haus huv thiab kev nyab xeeb. Dab tsi tseem ceeb yog seb cov khoom siv raw siv los ntawm lub tuam txhab ua tau raws li qhov yuav tsum tau ua, tsis yog qhov sib txawv ntawm ob yam khoom. Tag nrho cov kav dej tsim nyog PE thiab PPR cov kav dej yuav tsum raug kuaj xyuas kom huv (tshwj tsis yog cov khoom cuav thiab cov khoom tsis zoo). Hais tias cov kav dej PE muaj kev nyiam huv thiab nyab xeeb dua li cov kav dej PPR kuj yog kev dag ntxias rau cov neeg siv khoom. Yog li ntawd, tsis muaj qhov sib txawv ntawm kev nyab xeeb ntawm ob lub kav dej.
2, Modulus ntawm elasticity
Lub elastic modulus ntawm PPR dej yeeb nkab yog 850mpa. PE dej yeeb nkab belongs rau nruab nrab ntom polyethylene, thiab elastic modulus tsuas yog hais txog 550MPa. Nws muaj zoo elasticity thiab tsis txaus stiffness. Nws yog siv rau hauv kev tsim cov dej hauv tsev, nrog cov khoom tsis zoo, yooj yim khoov, yooj yim deformation thiab unsightly pipeline.
3, Thermal conductivity
Lub thermal conductivity ntawm PPR dej yeeb nkab yog {{0}}.24 thiab cov yeeb nkab dej PE yog 0.42, uas yog ze li ob zaug siab dua. Yog tias nws siv hauv pem teb cua sov, qhov no yog nws lub zog. Cov cua kub zoo txhais tau hais tias cov hluav taws xob hluav taws xob zoo dua, tab sis nws yog nws qhov tsis zoo hauv cov yeeb nkab dej kub. Cov cua kub zoo, qhov kub poob loj, siab dua qhov kub ntawm cov yeeb nkab thiab yooj yim kom kub.
PPR yeeb nkab thiab PE yeeb nkab, uas ntawm ob lub kav dej haus yog qhov zoo dua, tsis muaj ib qho lus teb kom raug. Qhov no feem ntau yog nyob ntawm lub sijhawm thov. Cov kav dej siv yuav sib txawv hauv ntau lub sijhawm.
Txawm li cas los xij, hauv lub neej, ib yam yuav tsum tau them sai sai rau yog tias txawm tias koj xaiv cov yeeb nkab zoo li cas, koj yuav tsum xaiv cov chaw tsim khoom tsis tu ncua los yuav nws. Tshwj xeeb tshaj yog thaum xaiv cov kav dej PPR, nws yog ib qho tseem ceeb tshwj xeeb los xaiv cov tuam txhab tsim khoom. Vim tias muaj ntau cov kav dej cuav PPR hauv kev ua lag luam, peb yuav tsum xaiv cov kev muag khoom raug cai thaum xaiv lawv.
