Advantages of anti-corrosion steel pipes
Release time:
2022-09-19
There are three primary methods for classifying steel pipes: by manufacturing process, by shape, and by application. Manufacturing processes are typically divided into seamless and welded types. By shape, steel pipes can be categorized into standard round, square, and special types such as double-dimple pipes. As a special type of steel pipe, anti-corrosion steel pipes undergo specialized anti-corrosion treatments that effectively prevent or slow down chemical or electrochemical reactions and corrosion during transportation and use.
There are three main methods for classifying steel pipes: by manufacturing process, by shape, and by application. Manufacturing processes are typically divided into seamless and welded. By shape, steel pipes can be categorized into special types such as round, square, and double-concave. Anti-corrosion steel pipe As a special type of steel pipe, after undergoing anti-corrosion treatment, it can effectively prevent or slow down chemical or electrochemical reactions and corrosion during transportation and use.
Corrosion is a major factor that severely affects materials, and metal corrosion represents an economic issue. According to statistics from relevant enterprises, annual losses caused by metal corrosion account for approximately 5% of the total social economic output, with pipeline corrosion accounting for a significant share of this figure. In China, direct economic losses due to steel pipe corrosion exceed 280 billion U.S. dollars each year, while worldwide, losses from steel pipe corrosion amount to as much as 500 billion U.S. dollars annually.
As a special type of steel pipe, anti-corrosion steel pipes undergo anti-corrosion treatment that effectively prevents or slows down chemical or electrochemical corrosion occurring during transportation and use, thereby extending the service life of the steel pipe and reducing its usage costs.
So, what exactly is an anti-corrosion steel pipe?
Anti-corrosion steel pipes, treated with anti-corrosion technology, can prevent or slow down chemical or electrochemical reactions during transportation and use. These pipes are widely used in pipeline engineering fields such as long-distance water transmission, petroleum, chemical industry, natural gas, thermal power, wastewater treatment, water supply, bridges, steel structures, and shipbuilding.
The anti-corrosion coating used for corrosion-resistant steel pipes is a solvent-free epoxy coating. Once cured, this coating exhibits excellent corrosion resistance, hardness, and density. The safe and reliable connection methods for polyethylene 3PE-coated steel pipes are primarily hot-melt or electrofusion welding. This treatment method essentially maintains structural consistency with the pipe body, achieving integration between the joint and the pipeline and effectively resisting stress. To protect the environment and conserve energy, the use of 3PE-coated steel pipes can be considered. The structure of the 3P anti-corrosion layer is as follows: the outer layer is polyethylene, approximately 3 mm thick; the underlying layer is FBE, ranging from about 50 to 128 mm thick; and the middle layer is a copolymer adhesive, roughly 200 mm thick. This layered structure combines FBE’s high adhesion, oxygen resistance, chemical corrosion resistance, and resistance to cathodic disbondment with HDPE’s moisture-proof properties, electrical insulation, and resistance to mechanical damage, forming a perfectly integrated whole.
The 3P anti-corrosion technology combines the excellent properties of both oxygen-based coatings and extruded polyethylene coatings, integrating the superior interfacial corrosion and chemical resistance of epoxy coatings with the mechanical protection provided by extruded polyolefin coatings. Features: The mechanical protection system boasts high strength, wear resistance, corrosion resistance, heat resistance, and cold resistance, making it suitable for media operating at temperatures up to 150 degrees Celsius. Therefore, the 3PE anti-corrosion coating is an ideal choice for underground pipelines.
In addition, anti-corrosion steel pipes also have the following characteristics:
1. The small inner wall friction coefficient reduces energy consumption;
2. The interior walls comply with national hygiene standards;
3. The inner wall surface is smooth, resistant to scaling, and features self-cleaning production capabilities.
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