Tam sim no tag nrho cov kev lag luam tau pib mus txog qhov txaus ntshai, thiab tsuas yog siab - cov khoom zoo tuaj yeem sawv ntawm ntau yam khoom. Tsuas yog thaum cov ntaub ntawv raw khoom zoo dua qub tuaj yeem ua tiav cov txiaj ntsig zoo tshaj plaws. Tam sim no, muaj ntau lub tuam txhab ntawm PPR kav thiab fittings. Cov khoom siv raw ntawm PPR kav yog polypropylene (random copolymerized polypropylene). Cov khoom tsim nrog ntau hom ntawm raw khoom muaj qee qhov sib txawv hauv kev ua haujlwm. Tsis tas li ntawd, cov qib ntawm cov kab ntau lawm txawv, thiab qhov zoo ntawm cov kav dej PPR tsim los ntawm ntau lub tuam txhab sib txawv heev. Thaum siv cov kav dej PPR, lawv yuav tsum tau kuaj xyuas ua ntej kev teeb tsa thiab siv tau tsuas yog tom qab qhov zoo tsim nyog. Cov kav dej uas tau xaiv thiab cov fittings yuav tsum xub muaj daim ntawv qhia txog kev soj ntsuam zoo ntawm lub tuam tsev saib xyuas zoo, ntawm cov kav dej thiab cov khoom siv rau cov dej haus yuav tsum muaj cov ntaub ntawv soj ntsuam kev tu cev ntawm lub chaw saib xyuas kev tu cev, thiab tom qab ntawd qhov zoo ntawm cov kav dej, txoj kab uas hla. thiab phab ntsa thickness ntawm cov kav dej thiab fittings yuav tsum tau soj ntsuam raws li GB / t 18742.2? 2002, GB/T18742. 3. Cov qauv hauv tebchaws xws li xyoo 2002 feem ntau sim cov khoom hauv qab no:
1. Qhov tshwm sim ntawm cov kav dej thiab fittings. Cov xim thiab luster ntawm cov yeeb nkab yuav tsum yog tib yam, thiab sab hauv thiab sab nrauv yuav tsum du thiab tiaj tus, tsis muaj kev nyuaj siab, npuas thiab lwm yam tsis xws luag cuam tshuam rau kev ua haujlwm, thiab yuav tsum tsis txhob muaj impurities pom; Qhov saum npoo ntawm cov yeeb nkab fittings yuav tsum du thiab tiaj, tsis muaj kab nrib pleb, npuas, tev, pom tseeb impurities, shrinkage loj, xim tsis sib xws, decomposition thiab discoloration thiab lwm yam tsis xws luag.
2. Opacity ntawm cov kav dej thiab fittings. Cov kav dej thiab fittings yuav tsum opaque.
3. Txoj kab uas hla thiab phab ntsa thickness ntawm cov kav dej thiab fittings. Raws li GB / T18742 2-2002 lub teb chaws tus qauv, cov kav dej tau muab faib ua S5, S4 thiab S3 raws li qhov loj me 2, S2. 5. S2 tsib series. Muaj kev sib raug zoo ntawm cov yeeb nkab series s thiab nominal siab. Cov yeeb nkab specification yog qhia los ntawm yeeb nkab series s, nominal txheej kab DN nominal phab ntsa thickness en. Nws tsuas yog ntsuas lub nominal txheej kab uas hla, nruab nrab sab nraud txoj kab uas hla, phab ntsa thickness sib xws rau cov yeeb nkab series, qhov (socket) loj ntawm cov yeeb nkab fittings thiab sib xws nominal txheej kab.
4. Lub cev, txhua yam thiab tshuaj lom neeg cov yeeb nkab thiab fittings. Txawm hais tias kev sim hydrostatic, yaj huab hwm coj tus nqi, kev ntsuas thermal stability nyob rau hauv lub xeev hydrostatic, longitudinal retraction tus nqi ntawm cov yeeb nkab thiab cov kev ntsuam xyuas ntawm cov nqaj txhawb nqa yooj yim ua raws li cov kev cai ntawm lub teb chaws cov qauv, uas tuaj yeem tshawb xyuas cov ntsiab lus ntawm cov ntaub ntawv soj ntsuam cov ntaub ntawv thiab cov ntawv tshaj tawm rov qab.
5. Txawm hais tias kev ua haujlwm huv ntawm cov kav dej thiab cov fittings ua tau raws li cov qauv hauv lub tebchaws. Cov khoom no tuaj yeem tshawb xyuas cov ntaub ntawv soj ntsuam kev ua haujlwm huv ntawm lub chaw saib xyuas kev huv huv ntawm cov kav dej thiab fittings.
6. Qhov system haum. Tom qab cov kav dej thiab fittings txuas nrog, lawv yuav tsum dhau qhov kev sim ua ke ntawm 8760 teev nyob rau hauv siab thiab 5000 thermal cycles.
