3PE anti-corrosion steel pipe for water supply pipeline, reinforced grade 3PE anti-corrosion steel pipe for high-pressure natural gas pipeline

Description :

　　Product characteristics of 3PE anti-corrosion steel pipes for water supply pipelines:

　　1. The inner wall is smooth with a roughness of 0.0081 and 0.0091 (tested by the Testing Center of the Chinese Academy of Water Resources), resulting in minimal head loss. The diameter of the medium can be reduced by one level when conveying the same flow rate.

　　2. Strong adaptability to terrain. Steel pipes have strong flexibility.

　　3. Easy installation, safe and reliable. The length of a single pipe can reach 12 meters, with the connection port reduced by half.

　　4. Smooth inner wall without scaling, meeting food grade requirements

　　The double-layer fusion bonded epoxy powder anti-corrosion production line consists of a pipe bending transmission device, shot blasting rust removal device, spraying device, and heating device.

　　The single-layer epoxy powder used by the 3PE anti-corrosion steel pipe manufacturer for water supply fundamentally ensures the anti-corrosion effect of the anti-corrosion steel pipe, and then proceeds to the next process: adhesive 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 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. 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.

　　The 3PE anti-corrosion steel pipe for water supply combines the excellent properties of epoxy coating and extruded polyethylene anti-corrosion layer, combining the interface characteristics and chemical resistance of epoxy 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 and is currently considered an advanced pipeline external anti-corrosion technology internationally. The anti-corrosion of 3PE anti-corrosion steel pipes conforms to the principles of "good anti-corrosion effect", "no pollution", "no solvents", "energy saving" and "good economy". The structural principle is: the bottom layer is fusion bonded epoxy, the middle layer is adhesive, and the surface layer is extruded polyethylene. Its characteristics are high strength, corrosion resistance, acid resistance, alkali resistance, salt resistance, and long service life. At present, the application effect of anti-corrosion coatings is well evaluated both domestically and internationally, and there are few reports on the defects that occur during their use. The main shortcomings of the report include dew point, peeling, cathodic peeling, cathodic protection shielding, and corrosion under the peeling anti-corrosion layer film. Moreover, most of the reports related to defects are still in the theoretical speculation stage, such as the issue of cathodic protection shielding mentioned in the data. So far, there have been no case reports of cathodic protection shielding occurring in the actual operation of the anti-corrosion layer. After years of practice, it has been shown that with the increase of service life, the coating system with fewer defects is the FBE/extruded polyethylene 3-layer structure anti-corrosion system.

　　The 3PE anti-corrosion steel pipe used for gas supply pipelines is the first generation of anti-corrosion forms applied to long-distance water transmission pipelines. Compared with traditional transmission pipelines, it has many advantages and features. The external anti-corrosion of the pipeline is 3PE, and the internal anti-corrosion of the pipeline is fused epoxy powder. The anti-corrosion standard of the inner wall of the pipeline has reached food grade The TPEP anti-corrosion steel pipe project produced by Cangzhou Kaishun Yuan Pipeline can be buried and used for 50 years according to national standards to ensure the normal use of the pipeline In water supply engineering, pipe materials account for 50% to 70% of the investment amount. Reasonable selection of pipeline materials is an important link in saving engineering investment, ensuring water supply quantity, quality, pressure, and safe operation. The basic principles for selecting pipes are:; The pipe material can withstand the internal pressure and external loads required by the design, with good water supply and sanitation conditions, convenient construction, low maintenance workload, reliable performance, long service life, smooth inner wall, basically unchanged water supply capacity, low engineering cost, and can adapt to local engineering geological conditions.

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