PPR is a random copolymer polypropylene synthesized by the gas phase method (PP and PE). Its structural feature is that the PE molecules are randomly linked among the PP molecules, and the molecular weight ranges from 300,000 to 800,000. Pipes produced from PPR raw materials are also called random copolymer polypropylene pipes. They are plastic pipe products developed and applied in the late 1980s and early 1990s. With its own excellent performance and a wide range of applications, it has already occupied a place in the plastic pipe market and is recognized as a green and environmentally friendly product. However, in the recent years of market operation, the above-mentioned analysis of PPR plastic pipe quality problems has also found that many problems have appeared in the PPR pipe market, which have largely restricted the sound development of PPR pipes.
>Why are the colors of PPR pipes different?
The PPR particles supplied by the manufacturer come in different colors, such as gray, etc., but most companies buy transparent raw materials, and different colors are added with different color masterbatches.
> Is there an inevitable connection between the color and quality of PPR pipes?
No. However, there are more cases where white PPR fails to pass light detection, while gray and green do not have these problems. In addition, affected by living habits, white PPR pipes are mostly used in the north, while gray PPR pipes are more in the south.
>How to distinguish PPR water pipe between cold water pipe and hot water pipe?
·PPR pipe is divided into cold water pipe and hot water pipe. The difference is that there is a blue marking line on the cold water pipe, and the hot water pipe is a red line.
In addition, PPR pipes have signs such as S5 S4 S3.2 S2.5, etc. Generally, S5 S4 are cold water pipes with thin wall thickness, and S3.2 S2.5 are hot water pipes with thick wall thickness.
>What are the characteristics of PPR water pipe connection technology?
·The interface of the PPR pipe adopts hot-melt technology, and the nozzle and the nozzle are completely fused together, so once the installation pressure test is passed, there will never be water leakage, and the reliability is extremely high.
