The full name of the 3PE anti-corrosion seamless steel pipe with PE coating (three-layer polyethylene) is Fusion Bonded Epoxy/Extruded Polyethylene Structure, which provides protective covering to significantly enhance the performance of each.

The (three-layer polyethylene) process is an advanced anti-corrosion technology introduced from abroad in the late 1990s, formally known as Fusion Bonded Epoxy/Extruded Polyethylene Coating. The 3PE anti-corrosion technology combines the excellent properties of both epoxy coatings and extruded polyolefin protective layers, merging the interface characteristics and chemical resistance of the epoxy coating with the mechanical protective properties of the extruded polyolefin layer, thereby significantly enhancing the performance of each. Its features include high mechanical strength, wear resistance, corrosion resistance, heat resistance, cold resistance, and suitability for use in media up to 150 degrees Celsius, making it adaptable to cold climates. Therefore, the 3PE anti-corrosion layer is an ideal external protection for buried pipelines. According to authoritative departmental testing, the lifespan of buried pipelines using 3PE anti-corrosion technology can extend up to 50 years.

(1) The buried PE pipes use PE80 SDR11 series polyethylene pipe materials for gas use, which should meet the requirements specified in GB15558.1-2003, "Underground Polyethylene (PE) Pipeline Systems for Gas - Part 1: Pipe Materials."

(2) The buried steel pipes are made of seamless steel tubes, with material grade 20#, and their quality should comply with the requirements of GB/T8163-2008 "Seamless Steel Tubes for Fluid Transportation."

(3) The overhead piping uses seamless steel tubes, with material grade 20#, which should meet the requirements of GB/T8163-2008 "Seamless Steel Tubes for Transportation of Fluids."

Three-layer polyethylene anti-corrosion is one of the main technical systems for external anti-corrosion of buried pipelines both domestically and internationally. It boasts excellent anti-corrosion properties, low water absorption rate, and high mechanical strength. In recent years, it has been increasingly widely used in buried water, gas, and oil pipelines in China.

Fluid Transfer 3PE Coating Seamless Pipe, 3PE Coated Steel Pipe, 3PP (Three-Layer Polypropylene) Coating

3PP Corrosion Protection (Three-Layer Polypropylene) Since the mid-1990s, most large pipeline corrosion protection in our country has used 3PP corrosion protection coatings. The 3PE coating has undoubtedly become the standard for pipeline corrosion protection in China. However, in recent years, due to the Sudan pipeline project constructed by our country, the 3PP coating has gradually gained recognition. 3PP and 3PE coatings both belong to the multi-layer coating system, consisting of the bottom epoxy powder layer, the middle adhesive layer, and the outer pP (polypropylene) jacket. PP and PE have similar processing properties, so the 3PE production line can fully produce 3PP coatings without the need for a separate 3PP coating line. However, the inherent differences in performance between PP and PE materials also result in different properties for 3PP and 3PE coatings, making them suitable for different environments. The advantages of 3PP coatings in certain performance aspects allow them to function in areas where 3PE coatings are not suitable, and as a result, many pipeline projects abroad have already adopted 3PP corrosion protection coatings.