The 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, 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 the Kushan oil pipeline that have been built in China, as well as the nearly 4000 kilometers of the national key project West East Gas Pipeline, have recently 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 on the outer ring road, and the 122 kilometer underground gas storage pipeline on the Shaanxi Beijing line also use three-layer PE. The current development status of the 3PE anti-corrosion steel pipe industry in China is quite good. The 3PE anti-corrosion seamless steel pipe, which we are familiar with in the anti-corrosion industry, also plays a significant role in the industry. Today, we will analyze and introduce the relevant knowledge of 3PE anti-corrosion seamless steel pipe manufacturers, hoping to be helpful for those in the industry who are not yet familiar with its functions The three-layer structure of polyethylene (3PE) anti-corrosion coating has been widely used in the petroleum pipeline industry due to its excellent corrosion resistance/water vapor permeability and mechanical properties. 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 is because they use different external anti-corrosion coatings. 3PE anti-corrosion steel pipe manufacturers follow the principles of environmental protection and quality. Epoxy powder coating is currently the first choice for large-scale pipeline projects in China. Since its application, anti-corrosion epoxy powder coating has been the best covering layer among the anti-corrosion epoxy powders used by domestic users in China, but the cost is relatively higher. From a long-term perspective, excellent cost-effectiveness is very evident. 3PE anti-corrosion steel pipe structure: The first layer is epoxy powder (FBE>100um), the second layer is adhesive (copolymer adhesive) 170-250um, and the third layer is polyethylene (PE) 2.5-3.7mm. These three materials are tightly fused together and firmly combined with the steel pipe to form an excellent pipe wall. The pipe wall has undergone heating in accordance with the epoxy powder process. When the powder comes into contact with the pipe wall, it will melt and stick to the pipe wall. Then, the temperature inside the pipe is lowered by suction to reduce the amount of powder stuck to the pipe wall. Three layer polyethylene (3PE) steel pipes are used for anti-corrosion of oil and gas. Execution standard: SY/T0413-2002DIN30670 This product is widely used and suitable for anti-corrosion of steel structures and mechanical equipment in marine facilities, petrochemicals, construction industry, and other industrial and mining enterprises, as well as various storage tanks, pipelines, and other steel materials. Anti corrosion steel pipes are widely used in pipeline engineering fields such as petroleum, chemical, natural gas, thermal, sewage treatment, water sources, bridges, and steel structures in China.
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