The thermal conductivity of ppr pipe is 0.24, the thermal conductivity of pe pipe is 0.42, and the thermal conductivity of pe pipe is nearly twice. We know that the lower the thermal conductivity of the water pipe, the better the insulation performance. If the PE pipe is used for floor heating, its advantages can be fully utilized. The better the heat dissipation effect, the better the heat radiation effect. But when used in hot water pipes, this has become his shortcoming. If the heat dissipation is good, the heat loss will be large, and the surface temperature of the pipes will be higher, which is easy to burn hands. Therefore, if it is used as a water supply pipe for home use, obviously the PPR pipe is much more reasonable than the PE pipe.
In terms of welding performance, the flanging of PPR pipes is round, while the flanging of PE pipes is irregular and easy to block; in addition, the welding temperature of PE pipes and PPR pipes is different, PPR pipes are 260°C, PE pipes are 230°C, and the welding temperature of PE pipes is 230°C. The special welding machine used for PPR pipes often has over-welding, resulting in water leakage. In addition, because the PE material is easy to oxidize, special tools must be used to scrape off the oxide skin on the surface before welding, otherwise it will not be possible to form a truly integrated pipe, and the pipe will easily leak. It can be seen from this that although both PPR water pipes and PE water pipes can be hot-melt welded, they are not very difficult in standardized operations. PPR water pipes are easy to operate and easy to construct. The key reason for PE pipes.
