1, "Look" appearance.
Good color. The PP-R water pipe produced by Shanghai gongjinniu has soft, uniform and uniform color without mottled color. PP-R pipes are mainly white, gray, green and yellow. Consumers often think that white is good. In fact, the color is not the standard to judge the quality. In fact, the quality of PP-R pipes has nothing to do with the color of PP-R pipes. Plastic particles are mainly white and transparent (there are also other colors added with color masterbatch). As long as the color masterbatch is added, any color can be produced, and the color masterbatch will not be decomposed and will not change the quality of pp-r. therefore, it doesn't matter what color the water pipe is. According to the regulations, PP-R water pipe should have good light closing performance. In this regard, gray or other light tight properties will be better. However, such advantages only exist in the open pipe installation and pipe well. All the water pipes of home decoration are buried, so there is no saying that gray is better than other colors
PPR dej yeeb nkab yog opaque kiag li, thiab pseudo PP -R yeeb nkab yog pob tshab me ntsis los yog ib nrab pob tshab. Feem ntau, cov khoom dawb tsuas tuaj yeem tsim nrog PP ntshiab -R cov ntaub ntawv raw. Piv txwv li, cov xim ntawm cov khoom tsim los ntawm kev ntxiv cov khoom siv rov ua dua tshiab, cov ntaub ntawv pov tseg thiab cov khoom siv kaum tsev tsis yog mos thiab tsis zoo, thaum cov xim ntawm lwm cov khoom siv xim ua tiav nrog cov xim masterbatch yuav tsis cuam tshuam los ntawm kev ntxiv cov khoom siv rov ua dua tshiab, cov ntaub ntawv pov tseg thiab cov khoom kaum. Qhov no yog vim li cas ntau lub tuam txhab uas them nyiaj rau qhov zoo tshaj plaws yog tsom mus rau cov khw muag khoom kho kom zoo nkauj hauv tsev, thiab lawv cov khoom feem ntau yog dawb; Sab hauv thiab sab nrauv ntawm cov khoom yuav tsum du thiab tiaj tus, thiab yuav tsum tsis muaj npuas, pom kev nyuaj siab, grooves, impurities thiab lwm yam tsis xws luag.
2, Kov kev ntxhib los mos.
Zoo PP-R kav dej yog 100 feem pua PP-R cov ntaub ntawv raw (tsis muaj cov khoom ntxiv). Qhov kev ntxhib los mos yog ntshiab, qhov saum npoo yog du, thiab kev xav yog mos. Kev xav ntawm pseudo PP-R kav dej yog du. Feem ntau hais lus, cov lus ntxhib zoo li yuav raug tov nrog impurities;
3, "Smell" the smell.
Cov khoom tseem ceeb ntawm PP-R yeeb nkab yog polypropylene. Cov yeeb nkab zoo tsis muaj ntxhiab tsw, thaum cov yeeb nkab tsis zoo muaj ntxhiab tsw txawv. Nws yog qhov yuav tsum tau tov nrog polyethylene es tsis yog polypropylene;
4, "Pinch" hardness.
PP-R raj muaj qhov nyuaj heev. Nws tuaj yeem yooj yim pinched thiab deformed. Nws yeej tsis yog PP-R raj;
5, "Measure" wall thickness,
Tsis tas li ntawd, vernier caliper tuaj yeem siv los ntsuas seb cov yeeb nkab phab ntsa thickness ua tau raws li tus qauv thiab tsis sib xws. Feem ntau, cov kav dej zoo yog tsim los ntawm nruj raws li lub teb chaws tus qauv, tab sis txoj kev no yuav tsum muaj kev nkag siab txog lub teb chaws tus qauv ntawm PP-R yeeb nkab.
6, "Listen" to the sound.
Lub suab tsaws ntawm PP-R raj yog npub, thiab lub suab tsaws ntawm pseudo PP-R raj yog nkig.
7, "Smash" elasticity.
A good PP-R pipe has good "resilience" and is easy to break. Naturally, it is not a good PP-R pipe, but the best PP-R pipe can be broken when the temperature is lower than 10 degrees. However, strong hardness does not mean good elasticity. Some manufacturers improve the hardness by adding too many impurities such as calcium carbonate, which can not be broken and is easy to crack after long use; (due to the cold brittleness of PP-R raw materials, the properties are different in several temperature ranges: 10, - 5, - 23)
8, "Burn" smoke smell.
The PP-R tube mixed with recycled plastics and other impurities in the raw materials will emit black smoke and pungent smell. Good materials will not emit black smoke and smell after combustion, and the molten liquid is still very clean after combustion. (you can also "pull" to see its "length")
9, "Melting".
Qhov ntsuas kub li qub ntawm PP-R pipeline thaum vuam yog nyob rau hauv thaj tsam ntawm 260-290 degree, thiab qhov vuam zoo yuav raug pov thawj zoo thaum vuam nyob rau hauv qhov ntsuas kub no. Yog tias cov khoom tuaj yeem nkag mus rau hauv lub vuam tuag lub taub hau tau yooj yim thaum lub sij hawm vuam nyob rau hauv ib txwm welding tsis, thiab cov welding commulation qog nyob ze rau cov kua, nws qhia tau hais tias cov khoom tsis yog tsim los ntawm cov qhabnias PP-R raw khoom, tib yam lub sij hawm, yog hais tias cov welding tsub kom cov qog yuav txias thiab hardened sai sai (feem ntau nyob rau hauv 10 vib nas this), nws kuj qhia tau hais tias cov khoom tsis yog tsim los ntawm cov qhabnias PP-R raw cov ntaub ntawv. Qhov no yog vim hais tias ib qho ntawm cov yam ntxwv ntawm PP-R yog qhov thermal rwb thaiv tsev zoo, thiab nws cov cua txias yuav qeeb qeeb. Saib seb lub puab txoj kab uas hla ntawm cov yeeb nkab yog deformed thiab seb cov yeeb nkab fittings yog txhuam. Zoo PP-R yeeb nkab tsis tuaj yeem txhuam thiab lub taub sab hauv tsis yooj yim rau deformed.
10, "Check".
Siv cov cuab yeej kuaj xyuas kom paub thiab paub qhov zoo thiab qhov tsis zoo ntawm cov khoom. Ntau cov ntaub ntawv tseem ceeb uas yuav tsum tau ua yog teev nyob rau hauv lub teb chaws tus qauv, xws li yeeb nkab aging resistance test (qhov kev ntsuam xyuas uas yuav tsis poob rau 8760 teev thaum lub nplhaib kev nyuab siab yog 1.9mpa thiab qhov ntsuas kub yog 110 degree), pipeline system stability test (5000 txias thiab kub cycles) thiab cuam tshuam kev ntsuam xyuas. Yog li ntawd, cov neeg siv tuaj yeem nug cov tuam txhab lossis cov lag luam los muab cov ntaub ntawv ntsuas saum toj no rau kev txheeb xyuas. Tsis tas li ntawd, nws yuav tsum tau taw qhia tias lub teb chaws tus qauv tseem muaj qhov tseem ceeb ntawm cov khoom siv raw siv rau cov kav dej thiab fittings, uas yog, lub melt index. Lub teb chaws tus qauv xav kom qhov kev hloov pauv ntawm qhov ntsuas qhov ntsuas ua ntej thiab tom qab ua tiav yuav tsum tsis pub tshaj 30 feem pua, thiab tseem muaj qhov yuav tsum tau ua hauv kev lag luam uas cov khoom siv yaj ntawm cov khoom siv raw yuav tsum tsis txhob ntau tshaj 0.5g / 10min.