How to solve the aging problem of PPR Tee after long-term use under high temperature and high pressure conditions?

PPR Tee may have performance degradation due to material aging during long-term use under high temperature and high pressure conditions. This aging phenomenon is mainly manifested in reduced mechanical strength, reduced heat resistance and reduced chemical stability. In order to solve these problems, measures can be taken from multiple aspects such as material selection, production process, installation and maintenance, and post-testing. The following are detailed solutions:

Choose high-performance PPR materials

Choose modified PPR materials

Ordinary PPR materials are prone to creep and aging under high temperature and high pressure conditions, so modified PPR materials (such as block copolymer polypropylene PP-B or random copolymer polypropylene PP-RCT) can be selected. These materials have higher heat resistance and creep resistance.

Add antioxidants, UV stabilizers or other functional additives to slow down the aging rate of materials.

Increase molecular weight and crystallinity
PPR materials with high molecular weight and high crystallinity usually have better mechanical properties and heat resistance, and can maintain stability for a longer time under high temperature and high pressure conditions.

In the production process, the molecular structure of the material is optimized by controlling the polymerization process parameters (such as temperature, pressure and catalyst type).

Optimize production process
Precisely control molding process
During injection molding or extrusion molding, strictly control temperature, pressure and cooling time to ensure that the wall thickness of PPR tee is uniform and free of internal stress.
Avoid excessive processing temperature to prevent material degradation during the production stage.
Enhance welding quality

The connection parts of PPR tee (such as hot melt welding area) are its weak links and are prone to leakage due to aging. Use advanced hot melt technology (such as two-stage heating or precise temperature control) to ensure that the welding quality is firm and reliable.
Increase the thickness of the welding area or adopt enhanced weld design to improve the durability of the connection.
Improve product design
Increase wall thickness
Under high temperature and high pressure environment, appropriately increasing the wall thickness of PPR tee can improve its pressure bearing capacity and anti-aging performance.
Design products of different specifications according to specific working conditions to meet different usage requirements.
Optimize geometric structure
Improve the flow channel design of PPR tee to reduce the impact and wear of water flow on the pipe wall.
Add reinforcement ribs or support structures at key parts (such as connection ports) to improve overall strength.
Strengthen installation and maintenance
Correct installation
During the installation process, strictly follow the specifications to ensure that the hot melt temperature and time meet the requirements to avoid connection problems caused by improper installation.
Ensure that the design of the pipeline system is reasonable to avoid local overheating or excessive pressure causing additional burden on the PPR tee.
Regular inspection and maintenance
Periodically inspect the pipeline system, especially the connection parts of the PPR tee, to promptly detect and deal with potential problems.
Use ultrasonic testing or infrared thermal imaging technology to evaluate the internal condition and aging of the PPR tee.

In the future, with the development of new materials and technologies, the PPR tee will be more durable, reliable and environmentally friendly, providing better solutions for pipeline systems in the construction and industrial fields.