The implementation standard of PP-R pipes is: GB/T18742.2-2002. The factory length is 4 meters or 3 meters. Some manufacturers can customize the length according to customer needs or specifications. There are some brands of PPR water pipes. There are many brands, such as Rifeng, Jinde, Jinniu, Netcom, Hechang, Zhongcai and many other brands. When we buy water pipes, we not only look at the brand, but also look at all aspects. Observe more and make identification by observing and touching the surface markings, inner and outer layers of the pipe. 1. The surface words of genuine Netcom PPR pipes are generally printed with imported inkjet codes. The handwriting is clear, and the general markings such as trademark identification, manufacturer, address and even telephone number are clear and authentic; the surface words of counterfeit and shoddy pipes are blurred, and the manufacturer, logo, country Standards, etc. are generally unknown or not labeled. 2. Genuine Netcom PPR water pipes are made of high-quality raw materials, with high process precision. The surface and inner layers feel smooth and smooth, smooth and free of spots; while fake and inferior pipe products are relatively inferior due to cutting corners. 3. The wall thickness of genuine PPR pipes and aluminum layers is uniform, and the aluminum layers are tightly bonded. The quality and thickness of the pipes and aluminum strips can meet relevant national standards; while the wall thickness deviations of fake and inferior products are larger. 4. The hot-melt connection method of genuine Netcom PPR water pipes is hot-melt connection. No peeling is required during installation. The hot-melt connection is firm and reliable without leakage.