The outer PE inner EP plastic-coated composite steel pipe is a highly specialized product that combines the durability of steel with the corrosion resistance of plastic. This type of pipe is designed for versatility, offering no restrictions on calibers and allowing users to select the thickness of the lining based on specific needs. Depending on the corrosive environment, you can choose from different lining thicknesses, and lengths can range from 6 to 12 meters. The nominal diameter typically falls between 0.5-1mm, featuring an inner surface that is exceptionally smooth. This minimizes friction and wear, reducing fluid loss and maximizing flow efficiency, ultimately leading to energy savings.
In recent years, anti-corrosion spiral steel pipes have seen widespread adoption in construction projects like water supply and drainage systems, potable water distribution, and fire protection pipelines. Traditionally, hot-dip galvanized steel pipes were commonly used for fire protection systems. However, many modern buildings, including residential complexes, hotels, and offices, are now opting for internal and external epoxy powder-coated anti-corrosion steel pipes for their fire protection systems. These pipes offer both aesthetic appeal and durability, making them a key component of emerging industries in the 21st century. The outer PE inner EP plastic-coated steel pipe is professionally marketed, and the powder coating applied to these pipes includes flame retardants and modifications to the epoxy resin powder, ensuring superior heat resistance and preventing burning or softening over time.
One of the standout advantages of the outer PE inner EP plastic-coated steel pipe is its epoxy powder anti-corrosion properties. The paint film is robust, waterproof, and non-toxic, with excellent adhesion between layers. It demonstrates strong rust and water resistance, thanks to high-quality raw materials used in its formulation. The pipe also exhibits impressive mechanical strength, with a tough, wear-resistant, and impact-resistant paint film. With a high solid content and a coating thickness typically ranging from 100 to 500 microns, the epoxy powder anti-corrosion steel pipe offers a dense and protective layer.
The molecular structure of the epoxy powder anti-corrosion steel pipe contains active epoxy groups, which can be found at the ends, in the middle, or within the cyclic structure of the molecular chain. These active groups allow the epoxy to cross-link with various curing agents, forming a three-dimensional network polymer that is insoluble and infusible. Among the thermosetting powder coatings used globally, epoxy powder coatings are the most established and widely utilized variety. They play a crucial role in the electrostatic spraying process and hold significant importance in decorative coatings. Epoxy-phenolic powder coatings, on the other hand, boast superior chemical resistance and are often employed foré˜²è… applications.
Thermoplastic powder coatings, such as polyethylene, polyvinyl chloride, and polypropylene powders, each bring unique benefits and drawbacks to the table. These coatings possess excellent curing leveling and wetting properties due to their low molecular weight, ensuring strong adhesion to the steel pipe and resulting in a smoother plastic film surface.
Common thermosetting plastics include epoxy resins, phenolic resins, and amino resins. The coating thickness typically ranges from 100 to 500 microns, with 350 microns being the standard. The product boasts several key features: it is hygienic, non-toxic, resistant to fouling and microbial growth, ensuring the integrity of the fluid. It also exhibits excellent weather resistance, making it ideal for harsh environments like deserts and salt-alkali regions. When processing pipe threads, proper cooling is essential. For flanged connections, single-line processing drawings can be created based on on-site measurements, followed by coating and lining before transportation to the site for installation. Non-coated or plastic-lined steel pipes can also be assembled on-site using fittings, flange welding, and pipe assembly, then disassembled for further processing. Finished grooved plastic-coated pipe fittings are recommended, and grooving should be done using a rolling groove machine, adhering to relevant standards for groove depth.
While this description covers the primary aspects of the outer PE inner EP plastic-coated steel pipe, additional considerations may include the pipe's application in various industries, its environmental impact, and future advancements in coating technology that could enhance its performance even further.
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