Underground TPEP anti-corrosion straight seam steel pipe manufacturer

Description :

　　TPEP anti-corrosion steel pipe coating can also be machined as needed and used on dynamic components to enhance their wear resistance, gas corrosion resistance, and erosion resistance, and improve their service life in harsh environments. Through practical application assessment and testing, the heavy corrosion protection technology has become increasingly mature, solving many corrosion problems that other protection technologies have not solved, and making important contributions to the sustainable development of the national economy. It can be widely used in the following fields: long-distance transportation of oil, water, gas and other buried pipeline protection; Protection of process pipelines and special-shaped components that transport corrosive media such as acid, alkali, salt, and ash; Heavy corrosion protection for equipment such as pumps, valves, and fans; Corrosion protection of corrugated pipe compensators for heating and seawater pipelines; Corrosion prevention of steel structural components in marine engineering and docks; Electrolytic copper industry seed board edge coating; Repair of damaged equipment and pipelines; Long distance buried pipeline patching. At present, it has been applied in the anti-corrosion project of the "West East Gas Pipeline" bend, the anti-corrosion project of the Shanghai Pudong natural gas pipeline, the seawater pipeline of the Qinshan Nuclear Power Plant, and the key project of seawater valves on naval vessels. Experts believe that this series of coatings has a wide range of applications, good performance, long service life, and no environmental pollution. Promoting their use in related industries will significantly reduce economic losses caused by corrosion, and will undoubtedly generate significant economic and social benefits. 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 inner oxygen outer polyethylene anti-corrosion steel pipe combines the anti-corrosion performance of the coating and the deformation resistance of the steel pipe. The outer coating adopts a three-layer structure of polyethylene, with uniform coating thickness and tight bonding with the steel pipe, which increases the cathodic protection power level; The inner coating is made of thermosetting epoxy, which is hygienic and has no impact on water quality. It can be used in large city water supply and drainage pipelines, as well as pipelines for long-distance transportation of various water qualities such as chilled water, sewage, reclaimed water, and seawater. It can also be used as pipelines for transporting oil, gas, and oil gas mixtures. Moreover, the internal epoxy and external polyethylene anti-corrosion steel pipe has a low comprehensive cost and is an excellent product that conforms to green, environmentally friendly, low-carbon, and energy-saving principles. The hardships and setbacks we face cannot be reduced due to the fact that we have encountered enough. TPEP anti-corrosion steel pipe process is recommended: the outer wall adopts a three-layer structure of hot-melt bonding and winding process, with the bottom layer of epoxy resin, the middle layer of adhesive, and the outer layer of polyethylene forming a three-layer anti-corrosion layer. The inner wall adopts a thermal spray epoxy powder anti-corrosion method, which uniformly applies the powder on the surface of the pipe after high-temperature heating and fusion, forming a steel plastic composite layer, greatly improving the adhesion and thickness of the coating, enhancing its resistance to bumps and corrosion. Steel pipes have superior ductility, integrity, and convenient construction operability, suitable for underground laying, and can be used for crossing overhead structures, crossing rivers and inverted rainbows, and pipe jacking construction. The steel pipe and its accessories are shielded by anti-corrosion coating on their inner and outer wall surfaces, which is a convenient and commonly used protective measure.

　　The outer wall of TPEP anti-corrosion steel pipe (outer 3PE and inner epoxy powder) adopts a three-layer structure anti-corrosion layer formed by hot melt bonding and winding technology, with the bottom layer of epoxy resin, the middle layer of adhesive, and the outer layer of polyethylene. The inner wall adopts a thermal spray epoxy powder anti-corrosion method, and the powder is uniformly coated on the surface of the pipe body after high-temperature heating and fusion, greatly improving the adhesion and thickness of the coating. During construction, the pipe body should be placed on a good foundation, and expansion joints should be set every 10 to 10 along the pipeline. The anti-seepage structure should be appropriately thickened at the joint with the pipeline, and 1-2m thick impermeable material should be backfilled outside the pipe to prevent defects such as pipe body fracture or cracking caused by temperature changes and uneven settlement of the foundation, as well as concentrated seepage between the pipe body and the dam body. The performance of the three-layer TPEP coating is mainly due to its organic combination of the bottom layer epoxy powder, middle layer adhesive, and outer layer polyethylene, which gives the coating the advantages of fusion bonded epoxy powder (FBE) coating and polyethylene coating. Fusion bonded epoxy forms ionic bonds and physical interlocking forces with activated ions on the surface of steel pipes through its active groups, enabling it to firmly adhere to the metal substrate surface. The copolymer adhesive modified with polyethylene not only has the ability to form covalent bonds (ester bonds) with fusion bonded epoxy through chemical reactions, but also disrupts the electronic dipole balance of polyethylene material through grafting modification, enhancing the van der Waals forces between fusion bonded epoxy and copolymer molecules, effectively improving the interfacial bonding strength between the two.

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