3PE anti-corrosion steel pipe chemical pipeline anti-corrosion 3PE anti-corrosion steel pipe manufacturer

Description :

　　3PE anti-corrosion steel pipe, also known as three-layer PE (3PE), is an advanced anti-corrosion technology introduced from abroad in recent years. Its full name is fusion bonded epoxy/extruded polyethylene structural protective layer, which consists of the following three layers: the bottom layer is fusion bonded epoxy (≥ 80 μ m); The middle layer is adhesive (170-250 μ m); The surface layer is extruded polyethylene (about 2mm). The total thickness of the protective layer is about 1.8-3.7mm. In the three-layer structure, the main function of the fusion bonded epoxy powder coating is to form a continuous coating film, which is directly bonded to the surface of the steel pipe and has good chemical corrosion resistance and cathodic stripping resistance; Reacts with the active groups of the intermediate layer adhesive to form a chemical bond, ensuring that the overall anti-corrosion layer has good adhesion at higher temperatures. The intermediate layer is usually a copolymer adhesive, which is mainly composed of polyolefin. Currently, ethylene based copolymer adhesives are widely used. The polar functional groups of the copolymer adhesive can react with the epoxy groups of the fusion bonded epoxy powder coating to form hydrogen bonds or chemical bonds, forming a good bond between the intermediate layer and the bottom layer; The non-polar ethylene portion has a good affinity with the surface layer polyethylene, so the intermediate layer also has good bonding performance with the surface layer. The main function of polyethylene surface layer is to provide mechanical protection and anti-corrosion, which is the same as the traditional two-layer structure polyethylene anti-corrosion layer. Epoxy coal tar anti-corrosion steel pipe products have dry and agile characteristics, good adhesion, good flexibility, two-component packaging, and convenient construction. It has the characteristics of acid resistance, alkali resistance, salt resistance, water resistance, oil resistance, etc.

　　3PE anti-corrosion steel pipe refers to a three-layer structure polyolefin coating (MAPEC) external anti-corrosion steel pipe, which is a commonly used type of anti-corrosion pipeline in China. Other anti-corrosion methods include IPN8710, FBE epoxy powder, and epoxy coal tar. Generally refers to the anti-corrosion of the outer wall of steel pipes. In practical operation, the three materials are mixed and integrated into one, and processed to firmly bond with the steel pipe to form an excellent anti-corrosion layer. Its processing methods are generally divided into two types: winding and circular mold wrapping. In China, three-layer PE has been first applied in the oil and gas system. The Shaanxi Beijing natural gas pipeline and Kushan oil pipeline that have been built in China, as well as the nearly 4000 kilometers of West East Gas Pipeline, which is a national key project, have all adopted a three-layer PE external anti-corrosion coating. In Tianjin, the 67 kilometer high-pressure pipeline from Shaanxi to Tianjin, the 30 kilometer high-pressure natural gas pipeline from the outer ring line, and the 122 kilometer underground gas storage pipeline from Shaanxi to Beijing also use three-layer PE. The three-layer structure polyethylene anti-corrosion layer (3PE) combines the excellent properties of fusion bonded epoxy powder coating and extruded polyethylene anti-corrosion layer, combining the interface characteristics and chemical resistance of fusion bonded epoxy powder coating with the mechanical protection characteristics of extruded polyethylene anti-corrosion layer, thereby significantly improving their respective performance. Therefore, as an external protective layer for buried pipelines, it is very superior. According to relevant information, three-layer PE can extend the lifespan of buried pipelines to 50 years.

　　The three-layer structure polyethylene anti-corrosion coating (3PE) for 3pe anti-corrosion steel pipes combines the excellent properties of fusion bonded epoxy powder coating and extruded polyethylene anti-corrosion coating. It combines the interface characteristics and chemical resistance of fusion bonded epoxy powder coating with the mechanical protection characteristics of extruded polyethylene anti-corrosion coating, thereby significantly improving their respective performance. Therefore, as an external protective layer for buried pipelines, it is very superior. According to relevant information, three-layer PE can extend the service life of buried pipelines to 50 years, and is currently considered an advanced external anti-corrosion technology for pipelines internationally. In China, three-layer PE has been first applied in the oil and gas system. The Shaanxi Beijing natural gas pipeline and Kushan oil pipeline that have been built in China, as well as the nearly 4000 kilometers of West East Gas Pipeline, which is a national key project, have all adopted a three-layer PE external anti-corrosion coating. It has become the development direction of external anti-corrosion coatings for pipelines in the future. The anti-corrosion coating of 3pe anti-corrosion steel pipes is crucial for the service life of buried pipelines. For pipelines of the same material, some may not corrode after being buried underground for decades, while others may leak within a few years. It's because they use different external anti-corrosion coatings.

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