※ Product Introduction
The scientific name for PP-R pipes used for hot and cold water is random copolymer polypropylene, which is a plastic pipe made by random copolymerization of propylene monomer and a small amount of ethylene monomer under heating, pressure, and catalyst action. It is an ideal pipe material with excellent comprehensive performance, economic and environmental protection, and reliable connection. It is the absolute mainstream choice for modern household and building water supply pipelines. Its excellent performance has completely replaced traditional galvanized steel pipes and become the preferred choice for indoor hot and cold water piping systems.
※ Product Features
1. Corrosion resistant and non scaling:
It has no corrosive effect on most ions in water and chemicals inside buildings, and will not rust, avoiding secondary pollution of water quality caused by pipeline corrosion. The smooth inner wall has low water flow resistance and is not easy to scale, and the long-term use of water transport capacity will hardly decrease.
2, Heat resistant insulation：
Long term continuous use can reach a water temperature of 70 ° C, and short-term withstand temperature can reach 95 ° C, fully meeting the requirements of domestic hot water and heating systems. The thermal conductivity coefficient is only 1/200 of metal pipes. When used as a hot water pipe, it has significant insulation and energy-saving effects, reducing heat loss during transportation.
3Light weight and long service life：
The density is only 0.89-0.91 g/cm ³, which is the 1/8 of galvanized steel pipes, making handling and construction very lightweight. At rated temperature and pressure, the service life can reach over 50 years.
4. Reliable connection (hot melt connection)：
Adopting hot melt socket connection technology. The pipe and fittings are integrated into one after being heated by a specialized hot melt tool, and the strength of the connection is even higher than that of the pipe itself, completely solving the common problem of water leakage in threaded connections.
5. Environmentally friendly and non-toxic：
The raw material is polypropylene, whose chemical composition is carbon and hydrogen. It is non-toxic and odorless, and belongs to green and environmentally friendly materials. It can be used in direct drinking water delivery systems.
※ Implementation standards
GB/T 18742.2-2017Polypropylene piping systems for hot and cold water2Part: Pipe Materials
※ Pipe connection method
Hot melt socket connection (most commonly used)
Principle: Use a dedicated hot melt machine (including a heating die) to heat the outer surface of the pipe and the inner surface of the pipe separately. After the contact surface melts, quickly insert the pipe into the pipe socket and maintain pressure until it cools and solidifies, forming a tight connection.
Threaded connection (transition connection)
Principle: One end of the "threaded PP-R pipe fittings" is connected to the PP-R pipe by hot melt, and the other end is connected to the metal fittings by a thread (inner or outer). The thread needs to be wrapped with raw material tape or coated with sealant to enhance the sealing performance.
※ Application Fields
Indoor water supply and drainage in buildings Direct drinking water system Municipal and public facilities Floor heating auxiliary pipeline.
