Main quality inspection before PE pipeline construction

Before the construction of PE pipelines, the pressure resistance level, appearance quality of the pipelines, and consistency of pipeline materials should be mainly checked to ensure compliance with the work before construction preparation.

The connection between pipelines and fittings is achieved by heating the outer surface of the pipeline and the inner surface of the fittings with an electric heating wire buried on the inner surface of the fittings. If the PE pipe belongs to different SDR pressure rating series, hot melt butt connection cannot be used. When connecting pipelines with metal pipes or metal pipe accessories, flange or steel plastic transition joints should be used for connection. When the temperature decreases, the pipeline will bear more working pressure, and plastic pipes are prone to cracking. However, PE100 in PE pipes is suitable for large-diameter pipelines, greatly reducing the probability of rapid cracking of the pipeline.

The inner wall of PE pipes is generally not prone to scaling. Because the roughness ratio of its inner surface is only 1/20 of steel, with the same diameter and length. Under the same pressure, the flow capacity of PE pipes is 30% greater than that of steel pipes, which has significant economic advantages. Of course not. The cost of large pipes with a diameter greater than 200mm is relatively high.

The PE pipe adopts hot melt connection to ensure the unity of the interface material structure and the pipe body itself, realizing the integration of the joint and the pipeline, which cannot be achieved by metal fittings. The tensile strength of the interface is higher than that of the pipe body, which can effectively resist the circumferential stress and axial stress generated by internal pressure. The underground service life is greater than 20 years, with significant economic benefits and significant impact resistance and dual resistance effects.

PE pipes have multiple outer covering layers, high density, short contact time with metal objects, good temperature sensitivity, good thermal stability, and long service life; The design of its airflow indicator module and temperature connector is excellent, adaptable, and easy to supply through pipelines.

PE pipelines have various construction techniques. In addition to traditional excavation methods, various new non excavation techniques such as pipe jacking, directional drilling, lining pipes, and cracked pipes can also be used for construction. PE pipes have the advantages of low production energy consumption, low environmental pollution, and good product performance, and are increasingly favored by people and valued by relevant departments. Recently, the Ministry of Construction issued a notice to strengthen the production management and promote the application of plastic pipes.