>>>How to identify PPR pipes directly from the appearance In the previous period, PP-C pipes and fittings appeared on the domestic market, and the installation method was the same as PP-R. Many people do not understand the difference between PP-R and PP-C, causing many misunderstandings and confusion. In the international standards, polypropylene hot and cold water pipes are divided into PP-H, PP-B, and PP-R. There is no PP-C. The PP-C pipe on the market is actually a PP-B pipe, and its raw material is a block copolymerized polypropylene pipe special material. PP-B pipe is a type of hot and cold water pipe, the price is relatively cheap, and its heat and pressure resistance performance is very different from that of PP-R. For example: using conditional grading 2, design pressure 0.6MPadn25mm pipe, PP-R pipe wall thickness 3.5mm, PP-B (PP-C) pipe wall thickness 5.1mm; design pressure 0.8MPadn25mm, PP-R pipe wall thickness 4.2mm PP-B (PP-C) cannot be used. Because the required wall thickness is too thick. PP-C pipes with the same structure size and PP-R on the market have much lower operating conditions and cannot be mixed with PP-R pipes. Even after determining the conditions of use, PP-C pipes are replaced by PP-C pipes. The use condition 2 indicates a design temperature of 70° C. for hot water supply. Plumbing Villa Design Living Room,Accent Chair,Side Table,Tv Stand