Manufacturer of reinforced 3pe anti-corrosion steel pipes for water transmission

Description :

　　3PE anti-corrosion steel pipe three-layer structure polyethylene anti-corrosion coating (3PE) 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. Currently, it is considered the most effective 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. 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. It has become the development direction of external anti-corrosion coatings for pipelines in the future! At the same time, 3PE anti-corrosion steel pipes are divided into ordinary grade and reinforced grade, and their fundamental difference lies in the thickness. For common specifications 219-478, it is about 2.0mm, while reinforced grade is about 2.7mm. Their prices differ by about 7 yuan per square meter. The choice of anti-corrosion grade depends on the specific requirements of the customer. If it is used for ordinary casing external anti-corrosion, ordinary grade is more than sufficient. If it is used for direct fluid flow, such as acid and alkali, natural gas, etc., reinforced grade should be used as much as possible.

　　Enhanced 3PE anti-corrosion steel pipe, also known as three-layer PE anti-corrosion steel pipe, 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. 3PE anti-corrosion spiral steel pipe, reinforced 3PE anti-corrosion spiral steel pipe.

　　The main equipment of 3PE anti-corrosion steel pipe manufacturer Guangshan includes steel pipe buffer platform, pipe shifting unit, traction machine, pipe threading machinery, high-pressure blasting machine, repair platform, transmission line, steel pipe preheating furnace, shot blasting machine host maintenance platform and diverging grid steel pipe return transmission line, fast in roller group, fast out roller, maintenance platform, etc. The bare tube undergoes shot blasting and rust removal through intermediate frequency heating. After rust removal inspection, it is heated again and sprayed at a certain temperature. First, powder coating is carried out, followed by adhesive coating, and finally, polyethylene coating is applied. Strictly conduct spray inspection. 3PE anti-corrosion steel pipe manufacturer's anti-corrosion production line processes and produces 3PE/2PE/FBE/2FBE/2PP/3PP anti-corrosion steel pipes, with product specifications ranging from ? 89mm to ? 1820mm, wall thickness from 6mm to 20mm, and an annual production capacity of 400000 tons. Only manufacturers of 3PE anti-corrosion steel pipes can produce 3PE anti-corrosion steel pipes and enhance their service life (usually 50 years).

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• Reinforced 3pe anti-corrosion steel pipe for water transmission