Similar comparison of UPVC pipe

Both UPVC pipes and PE pipes are thermoplastic pipes. They have the same characteristics, but they are flexible. Heat resistance requirements. There are also differences in technical characteristics such as anti-aging. The technical characteristics of UPVC pipe and PE pipe are compared and analyzed as follows:

1. Performance comparison of UPVC and PE pipes

Types of pipes Advantages Disadvantages UPVC has strong corrosion resistance, easy to connect, inexpensive, and hard. It is not suitable for the transportation of hot water, the joint bonding technology requires high, and the curing time is long. HDPE has light weight, good fatigue strength, good temperature resistance, good toughness, and good flexibility. Welding requires electricity; mechanical connectors are more expensive.

As can be seen from the above table, the PE pipe is more expensive due to its connected joints, which restricts and hinders its wide application.

2. The coefficient of linear expansion of UPVC and PE pipes

Pipe material Linear expansion coefficient a (/0C) UPVC (Unplasticized Polyvinyl Chloride) 6×10－5 HDPE (High Density Polyvinyl Chloride) 18×10－5 MDPE (Low Density Polyvinyl Chloride) 16×10－5

It can be seen that PE pipe has a larger coefficient of linear expansion than UPVC pipe, so it should be paid attention to in the design.

3. Comparison of UPVC pipe anti-aging performance

Developed countries on PVC. The comprehensive evaluation of PE pipes is as follows:

Content Evaluation value PVC HDPE MDPE Aging resistance value 20 13

It can be seen from the above table that PVC pipes are better than PE pipes from the perspective of aging resistance and long-term strength; from the perspective of damage, PE is better than PVC. As for the ease of rolling and welding, it only depends on the installation process. Transportation is related and should not be used as the main indicator for evaluating the two materials.

4. Installation and connection form of UPVC pipe and PE pipe

As mentioned before: The connection method of UPVC pipe has socket rubber ring connection. Adhesive connection and flange connection are more suitable for pipes with larger diameters. If the adhesive connection is used, it is difficult to ensure the absolute cleanness of the pipe joint before bonding, a grain of sand. A small bubble will be a hidden danger of water leakage in the interface. In addition, the bonding is also affected by temperature and air, which makes it difficult to construct outdoors.

The connection form of PE pipe has electric heat fusion connection and heat fusion butt connection. Especially for the electric heat fusion connection, it uses a sleeve to cover the joints of the two pipes. The sleeve and the two pipes are heated by the heating wire inside the sleeve. The process is easy to achieve and ensure that the joints are not dense. Leaks, but this sleeve type connector is expensive.