1. PPR raj yog ntshai ntawm ultraviolet rays
Cov neeg siv uas muaj qee qhov kev paub txog cov kav dej PPR yuav paub zoo dua. PPR cov kav dej tau muab tso rau sab nraum zoov ntev, thiab lawv tsis tshua kov. Lawv yuav ua nkig nyob rau hauv ob peb xyoos. Qhov no yog cov yam ntxwv ntawm cov ntaub ntawv polypropylene, uas tsis tuaj yeem tiv taus hluav taws xob ultraviolet, thiab tag nrho cov kev laus zuj zus nyob rau hauv lub hnub raug yog ib qho tshwm sim heev.
2. PPR raj lub caij ntuj sov tiv thaiv
Sab nraum zoov PPR kav tsuas yog xav tau kev tiv thaiv me ntsis yog tias lawv xav tau ntev. Feem ntau, cov kev ntsuas uas tuaj yeem ua rau PPR cov kav dej tiv thaiv yog raws li hauv qab no:
(1) Siv cov txheej tshwj xeeb los tiv thaiv- cov xim ultraviolet rau ntawm cov yeeb nkab, uas tuaj yeem thaiv cov kab hluav taws xob ultraviolet
(2) Muaj cov tshuaj pleev thaiv hnub dub hauv khw, tseem hu ua thermal rwb thaiv tsev paj rwb, uas tuaj yeem muab qhwv ib ncig ntawm cov kav dej, thiab tuaj yeem yuav hauv qhov chaw uas lub hnub ci dej rhaub feem ntau muag.
(3) Lub teeb yuag aluminium ntawv ci daim kab xev kuj tuaj yeem siv los lo rau sab nraum cov yeeb nkab dej rau ib lub lim tiam, uas muaj cov viscosity zoo thiab muaj zog adhesion, thiab tuaj yeem ua rau muaj kev tiv thaiv kev laus.
3. PPR raj zais kev ua haujlwm
Yog tias muaj kev tso cai, nws yog qhov zoo tshaj rau faus PPR pipeline. Vim hais tias cov yeeb nkab PPR muaj kev tiv thaiv corrosion zoo, nws yuav tsis raug corroded thaum faus rau hauv av, uas tsis tuaj yeem ua lub luag haujlwm ntawm lub hnub tiv thaiv lub caij ntuj sov, tab sis kuj tiv thaiv - khov hauv lub caij ntuj no. Yog li ntawd, txoj kev zais cov raj xa dej rau kev kho kom zoo nkauj hauv tsev tsis tas yuav txhawj xeeb txog qhov teeb meem ntawm lub hnub raug, uas yog ib txoj hauv kev kho zoo tshaj plaws tam sim no.
4. Yuav ua li cas txuas cov kav dej ppr
(1) Qee zaum yuav tsum muaj kev sib txuas sai sai rau kev kho mob xwm txheej ceev. Qhov kev sib koom ua ke no tsis yog kub- yaj, yooj yim thiab ceev, thiab tuaj yeem siv rau kev siv ib ntus. Yog tias nws siv sijhawm ntev, qhov kub - yaj yog qhov ruaj khov.
(2) Qee zaum kev sib txuas ntawm cov kav dej thiab cov khoom siv hluav taws xob lossis cov kav dej sib txawv yuav tsum tau txuas nrog cov khoom siv hlau. Nyob rau hauv cov ntaub ntawv no, nws yuav tsum tau muab kaw nrog raw khoom tapes.
(3) Lub linear expansion coefficient ntawm PP-R yeeb nkab yog qhov loj (0.15mm / m degree), yog li kev ntsuas yuav tsum tau coj los tiv thaiv kev nthuav dav thiab deformation ntawm cov yeeb nkab thaum cov yeeb nkab. raug los yog tsis ncaj qha faus.