PE has a rich source of raw materials. From the molecular structure (C2H4), the molecular structure of PE is the simplest one. The PE pipeline is developing and constantly overcomes its own shortcomings. The heating and welding of PE pipes requires a certain operation space and skilled operation techniques. Later, the electric heating welded bushing was invented, that is, two pipe sections or pipe fittings were connected by an electric heat welding sleeve. This connection method was used for the environment in the pipe trench or the place where the construction space was narrow. The material properties of PE pipes are also improving. From PE63, PE80 to PE100, PE115 will be developed in the future. PE100 means that at 200 ° C, this grade of PE material can maintain a minimum strength (MRS) of 10 MPa after 50 years. PE80 is 8.0Mpa. With the improvement of PE material grade, the wall thickness of PE115 is lower than that of PE100, and the wall thickness of PE pipe is thinner, which reduces the amount of PE material. The cost is reduced, which is beneficial to the application of PE pipes in large diameter pipes.
The connection of the PE pipe needs to be heated, and a certain cooling time is also required. It takes about 20 minutes for each welding. The larger the pipe diameter, the longer the heating and cooling time, so the installation period of the PE pipe is relatively extended.
Features:
1. Long service life. Under normal conditions, the minimum life span is 50 years.
2. Good hygiene. No scaling, no bacteria, solve the secondary pollution of drinking water.
3. Resist corrosion of a variety of chemical media, no electrochemical corrosion.
4. The inner wall is smooth, the friction coefficient is extremely low, the passing ability of the medium is correspondingly improved and the wear resistance is excellent.
5. Good flexibility, high impact strength, strong shock and distortion resistance.
6. The unique hot-melt butt joint and hot-melt spigot technology make the interface strength higher than the pipe body, ensuring the safety and reliability of the interface.
7. The welding process is simple, the construction is convenient, and the construction cost is low.
8. Light weight, convenient transportation and installation.
Applications:
Urban water supply:
PE pipeline has the comprehensive advantages of safety, sanitation and convenient construction, and has become an ideal pipe for urban water supply.
Natural gas and gas transmission:
Due to the reliable connection, stable performance, easy construction and corrosion resistance of PE pipes, it has become the only choice for medium and low pressure natural gas transmission.
Food chemical industry:
PE pipe has unique chemical resistance, it can be used for the transportation or discharge of various acid, alkali and salt liquid, long service life, low cost and low maintenance cost.
Mineral sand and mud conveyor:
The wear resistance of PE pipe is four times of steel pipes, and it can be widely used for conveying ore, power plant fly ash, river dredging mud, etc.
Replacement of cement pipes, cast iron pipes and steel pipes:
For the old pipe renovation of the original cement pipe and cast iron pipe laid in the city, the PE pipe can be directly inserted without extensive excavation. Replacement in the old pipe, low construction cost and short construction time, especially suitable for the re-election of pipelines in the old city.
Landscaping:
Landscaping requires a large number of water pipelines, and PE pipelines are low in cost and worthy of promotion.
Other applications:
PE pipes can also be widely used in other fields, such as electric power, communication sheath, farm irrigation, siphon drainage, landfill, geothermal air conditioning, deep sea aquaculture, buried fire protection pipelines, etc.
