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3PE anticorrosive steel pipe (three layer PE) technology is introduced from abroad advanced anti-corrosion technology in the late 1990s, it's called the fusion bonded epoxy/extruded polyethylene protective layer structure.3PE anticorrosion technology combines epoxy coating and extruded polyethylene anticorrosive coating of excellent performance, the interface properties of epoxy coating and chemical properties and extruding polyene anticorrosive coating of mechanical protection features etc, so as to significantly improve their performance. Its characteristics: high mechanical strength, wear resistance, corrosion resistance, heat resistance, cold resistance, medium can be applied to 150 degrees, both in cold zone. Therefore, 3PE coating is the ideal of buried pipeline outer protective layer. According to authoritative department detection, the buried pipe lines' life with 3 PE anticorrosive technology can up to 50 years.