Color, good PP-R water pipe color is soft and uniform, no noise. (PP-R pipes mainly include white, gray, purple, green, yellow, and blue. Consumers often think that white is the best. In fact, color is not the standard for judging quality. In fact, the quality of PP-R pipes is similar to that of PP-R pipes. The color of the water pipe has nothing to do with it. The plastic particles are mainly white and transparent (there are also other colors that have been added with masterbatch), as long as the masterbatch is added, any color can be produced, and the masterbatch will not be decomposed nor will it change the quality of PP-R , so it doesn't matter what color the water pipe is. According to the national regulations, the PP-R water pipe must have good light-blocking performance. In this regard, gray or other opaque properties will be better. But this advantage is only In the installation of open pipes and pipe wells, the water pipes of home improvement are all buried in the dark, so there is no such thing as gray is better than other colors. PP-R pipes are completely opaque, and pseudo PP-R pipes are slightly transparent. Or semi-transparent. White products can only be produced from pure PP-R raw materials. For example, the color of products produced by adding recycled materials, scraps, and scraps is not soft or uniform, while other color products processed with color masterbatch are added and recycled. materials, scraps, scraps, etc. will not affect the color of the product. This is why many manufacturers who focus on quality and home improvement retail are mainly white); The inner and outer surfaces of the product should be smooth and flat, no bubbles, obvious defects such as pits, trenches and impurities.
"touch" texture
Hea PP-R veetoru on 100 protsenti PP-R tooraine (ilma lisanditeta). Tekstuur on puhas, pind on sile ja käsi tundub pehme ning pseudo PP-R toru tundub sile. Üldiselt on karedad osakesed tõenäoliselt segatud lisanditega;
"smell" the smell
PP-R toru põhimaterjal on polüpropüleen. Headel torudel pole lõhna ja kehvadel torudel on imelik lõhn. Tõenäoliselt segatakse see polüpropüleeni asemel polüetüleeniga;
"pinch" hardness
PP-R torul on märkimisväärne kõvadus ja toru, mis võib muljumisel deformeeruda, ei ole kindlasti PP-R toru;
"Quantity" Wall Thickness
Lisaks saab noonuse nihikuga mõõta, kas toru seinapaksus on normikohane ja ühtlane. Üldiselt toodetakse häid torusid rangelt kooskõlas riikliku standardiga, kuid see meetod nõuab PP-R torude riikliku standardi teatud mõistmist.
"listen" to the sound
PP-R toru heli on tuhm ja pseudo PP-R toru heli on kargem.
"Smash" elasticity
A good PP-R pipe has good "resilience" and is easy to smash. Naturally, it is not a good PP-R pipe, but the best PP-R pipe can be smashed even if the temperature is lower than 10 degrees. However, strong hardness does not mean good elasticity. Some manufacturers increase the hardness by adding too many impurities such as calcium carbonate, which cannot be broken, and are easily brittle after a long time; (due to the cold brittleness of PP-R raw materials, performance in several temperature ranges Different: 10, -5, -23...)
"burning" smoke smell
The PP-R tube with recycled plastic and other impurities mixed in the raw material will emit black smoke and have a pungent odor. And good materials will not emit black smoke and odor after burning, and the molten liquid is still very clean after burning. (Also you can "pull", see its pull "length")
"melt"
PP-R torujuhtme normaalne keevitustemperatuur on vahemikus 260-290 kraadi. Selles temperatuurivahemikus keevitamise ajal on keevituskvaliteet paremini tagatud. Kui keevitusparameetrid on tavapärastest keevitusparameetritest madalamad, võib toode keevitamise ajal kergesti keevitusvormi siseneda. Ja keevitusvaia on vedelikulähedane, see tähendab, et toode ei ole toodetud autentsete PP-R toorainetega ning kui keevitusvaia saab kiiresti jahutada ja karastada (tavaliselt 10 sekundi jooksul), võib see ka näitavad, et toode ei ole autentne PP-R tooraine Seda seetõttu, et PP-R üks omadusi on parem soojusisolatsiooniefekt ja selle jahutuskiirus on loomulikult aeglasem.
Kontrollige, kas toru siseläbimõõt on deformeerunud ja kas toruliitmikud on tõmmatud. Head PP-R toru ei saa tõmmata ja siseläbimõõt ei deformeeru kergesti.
"check"
Testimisseadmete laenamine testimiseks võimaldab tõhusalt eristada toodete plusse ja miinuseid. Riiklikus standardis on sätestatud mitmed väga olulised katsenõuded, näiteks torude vananemiskindluse katse (rõnga pinge 1,9 MPa ja katsetemperatuuri 110 kraadi korral, katse, mis kestab 8760 tundi ilma tõrgeteta) , torusüsteemi stabiilsuskatse (kuum ja külm) 5000 tsüklit) ja löögikindluse test jne, nii et kasutaja saab nõuda, et tootja või ärimees esitaks kontrollimiseks ülaltoodud katsearuande. Lisaks tuleb märkida, et riiklikus standardis on oluline nõue ka torude ja liitmike jaoks kasutatavatele toorainetele, milleks on sulamisindeks. Rohkem kui 0,5 g/10 min.