At present, the PPR water pipe market is mixed, and it is difficult to distinguish the good from the bad with the naked eye, which brings a lot of risks and troubles to consumers' purchase. Here to remind consumers, we must be careful when purchasing. At present, there are many manufacturers of PPR pipes. The raw material of PPR pipes is polypropylene (random copolymerized polypropylene). The products produced with different brands of raw materials have certain differences in performance. In addition, the grades of production lines are different, and the quality of PPR pipes produced by various manufacturers varies greatly. When PPR pipes are used, they must be inspected before installation and can be used only after the quality is qualified.
Cov kav dej uas tau xaiv yuav tsum xub muaj daim ntawv qhia txog kev soj ntsuam zoo ntawm lub tuam tsev tshuaj xyuas qhov zoo, thiab cov kav dej uas siv rau cov dej haus yuav tsum muaj daim ntawv qhia txog kev saib xyuas kev noj qab haus huv ntawm lub chaw saib xyuas kev tu cev. Tom qab ntawd, qhov zoo ntawm cov yeeb nkab txoj kab uas hla thiab phab ntsa thickness ntawm cov kav dej thiab fittings yuav tsum raug soj ntsuam raws li GB / T18742 22002, GB / T18742. Cov qauv hauv tebchaws xws li 32002 feem ntau tshuaj xyuas cov khoom hauv qab no:
1. PPR yeeb nkab zoo li. 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. Lub opacity ntawm PPR kav. Cov yeeb nkab yuav tsum opaque.
3. PPR yeeb nkab txoj kab uas hla thiab phab ntsa thickness. 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 ntawm cov kav dej PPR. 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 tu cev ntawm cov kav dej PPR puas 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 ntawm cov yeeb nkab.
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.
