PPR kav dej yog cov khoom siv nrov tshaj plaws rau cov kav dej hauv kev txhim kho tsev.
Txawm li cas los xij, hauv xyoo 1980s, cov khoom tseem ceeb ntawm cov kav dej hauv peb lub tebchaws yog cov kav dej galvanized, uas yog, cov kav hlau hlau tau coated nrog ib txheej ntawm zinc. Lub shortcomings ntawm galvanized yeeb nkab yog pom tseeb. Nws tsuas tuaj yeem raug rau cov yeeb nkab, thiab nws yooj yim heev rau xeb thiab yug cov kab mob. Tom qab ntawd, nws raug txwv los ntawm lub xeev.
Siv los hloov cov yeeb nkab galvanized, thawj zaug yog aluminium-yas composite yeeb nkab. Nws yog cov yeeb nkab ntau txheej, sab hauv thiab txheej txheej yog yas, thiab nruab nrab yog txhuas. Aluminium-yas tube sib xyaw ua ke cov khoom zoo ntawm cov khoom siv yas thiab hlau, muaj zog toughness, tuaj yeem khoov ntawm qhov siab, thiab tiv taus kub thiab kub siab tib lub sijhawm. Cov txheej txhuas hauv nruab nrab tuaj yeem txiav tawm cov huab cua thiab inhibit qhov kev loj hlob ntawm cov kab mob. Txawm li cas los xij, nws muaj teeb meem ntau dua los txuas cov yeeb nkab aluminium-yas nrog lub ferrule hom sib koom ua ke. Tom qab ntawd, cov kav dej PPR thaum kawg tuaj txog lub sijhawm keeb kwm, txaus siab rau cov neeg' qhov zoo tshaj plaws nrhiav cov kav dej:
Kev tiv thaiv ib puag ncig: Cov khoom tseem ceeb yog random copolymer polypropylene, uas yog non-toxic thiab tasteless, thiab yuav tsis ua paug dej. Cov kab mob tuaj yeem loj hlob tsuas yog thaum cov dej zoo li qub rau lub sijhawm ntev; Kev kub siab tiv thaiv: qhov kub thiab txias yog li ntawm -15 ° -95 °, txawm hais tias qhov siab tshaj plaws kub qis dua me ntsis ntawm cov kav dej yas, nws txaus kom ua tau raws li cov dej hauv tsev; Lub neej ua haujlwm ntev: Kev ua haujlwm siab, kev ua haujlwm siab ntawm cov kav dej tuaj yeem ncav cuag 2.0Mpa ~ 2.5Mpa, uas tuaj yeem siv tau 50 xyoo; tsis muaj dej to: PPR yeeb nkab kev twb kev txuas siv cov tshuab kub yaj, tsuav yog cov yeeb nkab dej tsim nyog, cov tshuab kub yaj kev sib txuas yog txhim khu kev qha thiab tsis tuaj yeem xau dej.
Ntxiv rau cov kav dej PPR, muaj ob yam khoom siv rau cov kav dej: cov kav dej tooj liab thiab cov kav hlau tsis muaj steel. Cov yeeb nkab tooj liab muaj kev ua haujlwm ruaj khov, tiv thaiv corrosion thiab ua haujlwm ntev. Tsis tsuas yog nws yuav tsis yug cov kab mob, tab sis nws tseem tuaj yeem ua kom tsis muaj menyuam. Muaj ob txoj hauv kev los txuas cov kav tooj liab: ferrule thiab vuam. Lub ferrule yog tib yam li txhuas-yas yeeb nkab, uas yog nquag mus rau kev laus thiab dej to. Kev siv vuam yog tib yam li PPR yeeb nkab kub yaj, thiab nws yuav tsis xau. Txawm li cas los xij, cov kav dej tooj liab muaj cov thermal rwb thaiv tsev tsis zoo. Yog tias cov kav dej tooj liab siv los ua cov kav dej kub, lawv yuav tsum tau them nrog thermal rwb thaiv tsev paj rwb. Stainless hlau yeeb nkab yog qhov zoo tshaj plaws ntawm cov kav dej hlau. Nws muaj zog corrosion kuj thiab cuam tshuam tsis kam. Lub siab ntawm cov yeeb nkab dej tuaj yeem ncav cuag siab tshaj 2.5Mpa, thiab qhov kub tsis kam yog -40 ° ~ 120 °. Nws yog ib puag ncig tus phooj ywg thiab huv si. Lub installation yog tib yam li cov yeeb nkab tooj liab, nws yog qhov zoo tshaj plaws los siv vuam.
Feem ntau hais lus, kev siv tooj liab thiab stainless hlau kav hauv tsev tsis siab. Qhov laj thawj tseem ceeb tshaj plaws yog tias lawv kim, cov khoom siv kim (tus nqi muag khoom yog ob peb zaug ntawm PPR kav), thiab kev teeb tsa kuj tseem kim dua.
