PPR pipes and fittings are pipeline systems manufactured according to GB/T18742, with random copolymer polypropylene as the primary raw material. Polypropylene can be categorized into three types: PP-H (homopolymer polypropylene), PP-B (block copolymer polypropylene), and PP-R (random copolymer polypropylene). Due to its superior long-term resistance to hydrostatic pressure, long-term resistance to thermal and oxidative aging, and ease of processing and molding, PP-R has become the preferred material for producing polypropylene pipes designed to meet a 50-year service life for both cold and hot water applications.

Product Features

Corrosion-resistant and scale-free, PP-R pipes boast excellent corrosion resistance, do not accumulate scale, and do not harbor bacteria. This eliminates concerns about pipe blockages caused by scaling as well as yellow stains and rust on sinks and bathtubs.

Non-toxic and hygienic; this product has undergone rigorous testing and fully complies with national drinking water standards, making it suitable for use in potable water and food industry piping systems.

It features high temperature resistance and excellent thermal insulation performance. The softening temperature of PP-R pipes is 131.5°C, allowing them to transport hot water at temperatures up to 95°C under conditions of long-term continuous operation at permissible pressures. This product also boasts superior thermal insulation properties, with a thermal conductivity approximately 1/200 that of metal pipes, thereby significantly reducing heat loss during the transportation of hot water.

The inner wall is smooth, resulting in low water flow resistance. PP-R pipes have a smooth inner wall, low water flow resistance, and high flow capacity—compared to metal pipes of the same inner diameter, they can increase flow rate by more than 30%.

High mechanical strength; PP-R pipes have excellent toughness, impact resistance, and high mechanical strength, making them particularly suitable for use in both low-temperature and high-temperature environments.

Lightweight, easy to install, and reliable.

Application areas of PP-R pipe products

Pipes for domestic hot and cold water systems, pipes for purified water and ultra-pure water delivery, pipes for hot water circulation and heating systems, pipes for water conveyance in food, beverage, and pharmaceutical factories, industrial hot and cold water pipelines, condensate water conveyance for central air conditioning, potable water distribution pipelines, pipes for aquaculture, water treatment pipelines, compressed air pipes, and gas supply pipes.

PP-R Pipe Installation Methods and Precautions

Construction method
1.1. According to construction requirements, measure and cut the required pipe length using a dedicated pipe cutter; the cut surface must be perpendicular to the pipe’s axis.
1.2 Wipe clean the contact surfaces of the coffin and fittings with cotton cloth, and mark an insertion-length indicator on the end of the pipe where it will be inserted.
1.3. Check whether the dedicated hot-melt tool is operating normally. If it is functioning properly, connect it to the power supply and wait until the indicator light for the working temperature (260 ± 10°C) illuminates. Then, insert the pipe into the heating sleeve without rotating it, ensuring that it is inserted to the marked fusion depth. At the same time, push the pipe fitting onto the heating head without rotating it, making sure it reaches the specified depth mark.
1.4 After the specified heating time has elapsed, immediately remove both the pipe and the fitting simultaneously from the heating mold. Then, swiftly insert them straight and evenly—without any rotation—into the connection to the depth indicated, ensuring that a uniform flange is formed at the joint.
1.5 During the specified cooling period, it is strictly prohibited to forcefully grip, bend, or pull at the joints of pipes and pipe fittings. The cooling times are shown in the table below.

Construction Precautions
2.1 Ensure that you select a qualified PP-R welding machine with clear temperature settings to guarantee welding quality.
2.2 During hydrostatic testing of pipes, the test pressure for cold-water pipes shall be 1.5 times the working pressure of the pipe, with a minimum of 0.9 MPa. The test pressure for hot-water pipes shall be twice the working pressure of the pipe, with a minimum of 1.2 MPa.