Txoj kev sib txuas ntau tshaj plaws rau PERT kav thiab fittings yog pob tw fusion vuam. Txoj kev no muaj qhov zoo hauv qab no: nws tshem tawm qhov xav tau ntawm cov khoom siv electrofusion, txo cov nqi ntawm qhov project; thiab nws simplifies tshuab thiab cuab yeej tu. Butt fusion vuam siv lub taub qab vuam tshuab, qhov twg cov welded sib koom yog tsau thiab txuas nrog cua txias. PERT yeeb nkab thiab haum vuam feem ntau muaj peb theem: cua sov, hloov, thiab taub qab vuam.
Vuam Txheej Taw Qhia
Kev Npaj Khoom: Lub roundness ntawm cov kav dej siv rau vuam fittings yuav tsum tshaj tus nqi tus qauv. Ib qho 10-20mm txiav nyiaj yuav tsum tau tso tseg thaum txiav.
Fastenance: Rau PE-RT cov yeeb nkab sib txuas, ob lub kav dej yuav tsum tau welded yuav tsum tau muab tso rau ntawm qhov chaw tiaj tus thiab clamped raws li vuam haum. Hloov lub hauv paus clamps, xaiv cov slips tsim nyog, thiab xyuas kom meej cov welded yeeb nkab seem yog clamped kom zoo ua ntej txiav.
Txiav: Tshem tawm cov impurities thiab oxide txheej los ntawm lub ntsej muag kawg ntawm cov yeeb nkab welded, kom ntseeg tau tias ob lub ntsej muag kawg yog du thiab tiaj tus.
Alignment: Lub misalignment ntawm ob welded yeeb nkab seem yuav tsum tau txo kom tsawg. Loj misalignments tuaj yeem ua rau muaj kev ntxhov siab. Misalignment yuav tsum tsis pub tshaj 10% ntawm phab ntsa thickness.
Cua sov: Xyuas kom muaj cov khoom molten txaus kom tso cai rau molecular diffusion thaum fusion taub qab vuam.
Kev hloov pauv: Lub sijhawm los ntawm qhov kawg ntawm cua sov mus rau qhov pib ntawm fusion taub qab vuam yog hu ua lub sijhawm hloov dua siab tshiab. Rau qhov zoo tshaj plaws fusion taub qab vuam zoo, lub sij hawm luv dua, qhov zoo dua.
Kub-melt taub qab vuam: Qhov no yog cov kauj ruam tseem ceeb hauv cov txheej txheem vuam.
Txias: Vim qhov tsis zoo thermal conductivity ntawm cov ntaub ntawv yas, qhov txias txias yog qhov sib npaug. Weld cov khoom shrinks, thiab cov txheej txheem tsim cov txheej txheem qeeb dua lub sijhawm ntev. Yog li ntawd, weld txias yuav tsum tau nqa tawm nyob rau hauv tej yam siab.
