Three-layer polyethylene anticorrosive spiral steel pipe for buried gas pipeline
With the acceleration of urbanization, gas pipelines play an increasingly important role in the construction of urban infrastructure. As an important part of gas transportation, the anti-corrosion performance of underground gas pipelines is directly related to the service life and safety of pipelines. Therefore, it is crucial to choose a pipe material with excellent corrosion resistance. As a new type of anti-corrosion steel pipe, three-layer polyethylene anti-corrosion spiral steel pipe has been widely used in the field of buried gas pipelines.
1. The characteristics of three-layer polyethylene anticorrosive spiral steel pipe.
1.Excellent anti-corrosion properties.
The three-layer polyethylene anti-corrosion spiral steel pipe adopts advanced anti-corrosion technology, and the comprehensive protection of the steel pipe is realized by coating the surface of the steel pipe with a multi-layer polyethylene anti-corrosion layer. This anti-corrosion layer has good corrosion resistance, weather resistance and insulation, which can effectively resist the erosion of soil, water and chemicals, and ensure the long-term stable operation of the pipeline.
2.Extended service life.
Due to the excellent anti-corrosion performance of the three-layer polyethylene anti-corrosion spiral steel pipe, it can significantly extend the service life of the pipe. Compared with traditional welded steel pipes, its service life can be increased by several times, reducing the frequency and cost of pipe replacement.
3.Reduced maintenance costs.
The three-layer polyethylene anticorrosive spiral steel pipe has a long service life and requires little special maintenance and maintenance during daily use. This results in a significant reduction in the maintenance cost of the pipeline, which saves the gas company a lot of operating costs.
4.Good environmental performance.
The three-layer polyethylene anticorrosive spiral steel pipe does not produce harmful substances in the production process and is harmless to the environment. At the same time, due to its excellent anti-corrosion performance, it can reduce leakage accidents caused by pipeline corrosion and further protect the environment.
Production process of two- and three-layer polyethylene anticorrosive spiral steel pipes.
The production process of three-layer polyethylene anticorrosive spiral steel pipe mainly includes the following steps:
1.Pretreatment: Pretreatment such as cleaning, rust removal and other pretreatment of the steel pipe to ensure that its surface cleanliness meets the requirements.
2.Base coating: A layer of binder and a semi-molten epoxy powder base coat is applied to the surface of the steel pipe to improve the adhesion between the steel pipe and the anti-corrosion layer.
3.Middle coating: A layer of epoxy powder coating with anti-rust, anti-corrosion and impact properties is applied on top of the base coating to improve the physical properties of the anti-corrosion layer.
4.Outer Coating Coating: A layer of weather-resistant, UV-resistant, and anti-aging polyethylene plastic powder coating is applied to the outer layer to enhance the wear-resistant, pressure-resistant, and insulating properties of the anti-corrosion layer.
5.Heat curing: The coated steel pipe is sent into the heating furnace for heating and curing, so that the coating melts and forms a continuous coating.
6.Cooling: The heated and solidified steel pipe is naturally cooled or forced cooled to complete the production of three-layer polyethylene anti-corrosion spiral steel pipe.
3. The application range of three-layer polyethylene anticorrosive spiral steel pipe.
Due to the excellent anti-corrosion performance and environmental protection performance of the three-layer polyethylene anti-corrosion spiral steel pipe, its application range is very wide. In the field of buried gas pipelines, this kind of steel pipes are widely used in urban gas transmission and distribution networks, residential gas pipelines and industrial gas transmission systems. In addition, the three-layer polyethylene anti-corrosion spiral steel pipe can also be used in petroleum, chemical industry, water treatment and other fields, providing reliable fluid transportation pipelines for industrial production and urban construction.
IV. Conclusions. With the continuous improvement of people's awareness of environmental protection and energy security, higher requirements are put forward for the anti-corrosion performance and environmental protection performance of buried gas pipelines. As a new type of anti-corrosion steel pipe, three-layer polyethylene anti-corrosion spiral steel pipe has been widely used in the field of buried gas pipelines due to its excellent anti-corrosion performance, environmental protection performance and long life. In the future, with the continuous progress of technology and the expansion of application fields, three-layer polyethylene anti-corrosion spiral steel pipes will continue to play an important role and contribute to urban construction and development.