Organic silicon high temperature and anti-corrosion steel pipe is a special steel pipe designed for extreme high temperature and corrosive environments. Its core anti-corrosion layer is composed of organic silicon resin and high temperature resistant materials. This type of steel pipe is usually composed of a working steel pipe, an organic silicon anti-corrosion layer, and an outer protective layer. It can withstand high temperatures of 200-1200 ℃ for a long time, and has characteristics such as oxidation resistance, chemical gas corrosion resistance, and resistance to cold and hot alternation. It is suitable for pipeline systems in industries such as petroleum, chemical, and power.

Solvent free epoxy coating is a two-component reaction cured anti-corrosion coating made by high-speed dispersion and grinding of low viscosity epoxy resin, pigments, additives, etc., and using low viscosity modified amine as a curing agent. The prominent advantage of using this coating is that it can reduce the air pollution caused by the volatilization of organic solvents. Moreover, it has excellent physical and mechanical properties, chemical resistance, and anti-corrosion performance. For example, it has excellent adhesion to the substrate and good wet adhesion; The coating formed after cross-linking and curing is hard, flexible, wear-resistant, scratch resistant, and impact resistant; It can effectively resist corrosive media such as water and oxygen from penetrating through the coating and corroding steel.

The water-based epoxy coating anti-corrosion steel pipe adopts environmentally friendly coating, which does not contain heavy metals such as lead, chromium, mercury, etc., and has excellent chemical corrosion resistance, water resistance, and microbial erosion resistance. Its paint film has high hardness and the surface is easy to clean, making it particularly suitable for places with strict hygiene requirements such as food factories and pharmaceutical factories. In addition, water-based epoxy coatings have strong adhesion to concrete and metal substrates, can seal substrate pores, and effectively prevent alkali problems.

Coated composite anti-corrosion steel pipe is a steel plastic composite pipe that uses steel pipe as the substrate and fuses plastic anti-corrosion coating (such as epoxy resin, polyethylene) on the inner and outer surfaces of the steel pipe through processes such as spraying, rolling, immersion, and suction. The inner core is usually made of welded steel pipe or seamless steel pipe, and the outer plastic layer not only retains the mechanical strength of the steel pipe, but also isolates the external corrosive medium through an anti-corrosion layer, combining the rigidity of metal pipes with the corrosion resistance of plastics.

PE polyethylene spray anti-corrosion steel pipes usually adopt multi-layer composite structures, commonly including 3PE anti-corrosion structure and TPEP anti-corrosion structure. The 3PE anti-corrosion steel pipe is composed of a bottom layer of fusion bonded epoxy powder (FBE), an intermediate layer of adhesive, and an outer layer of polyethylene (PE). The three layers of material are combined with the steel pipe through winding or coating processes to form a protective layer that is corrosion-resistant, wear-resistant, and has high mechanical strength. TPEP anti-corrosion steel pipes add an inner wall fusion bonded epoxy powder coating on the basis of 3PE, achieving dual anti-corrosion of the inside and outside, significantly improving the overall corrosion resistance and service life of the pipeline.

EP epoxy resin internal and external spray anti-corrosion steel pipes are made of steel pipes as the substrate, using synchronous internal and external coating technology. The inner wall is coated with epoxy resin powder, and the outer wall can be matched with anti-corrosion coatings such as polyethylene (PE) or epoxy coal tar. Epoxy resin has excellent chemical stability, corrosion resistance, and insulation properties. The coating thickness can be adjusted (usually above 300 μ m), and a dense protective layer is formed by high-temperature curing. It has strong adhesion and is not easy to peel off. The production process includes steps such as steel pipe pretreatment, electrostatic spraying or fluidized bed immersion coating, high-temperature curing, coating uniformity, and mechanical strength.

GZ-2 new polymer anti-corrosion coating uses modified acrylic acid, epoxy resin, chlorinated olefin and polyurethane as base materials, and adds non-toxic anti-corrosion pigments and additives to form a multi-layer composite anti-corrosion system. The coating achieves strong adhesion through chemical bonding between hydroxyl groups and the metal substrate, as well as the action of coupling agents. At the same time, metal oxide nanomaterials and rare earth ultrafine powders are introduced into the spatial network structure to form a dense interface transition layer, improving thermodynamic compatibility.

The 3PP polypropylene anti-corrosion steel pipe adopts a three-layer composite structure design, consisting of epoxy powder (FBE), adhesive (AD), and polypropylene (PP) layers. The first layer of epoxy powder is tightly bonded to the surface of the steel pipe through electrostatic spraying, forming a chemically bonded anti-corrosion layer; The intermediate adhesive layer serves as the connecting medium, and the epoxy layer firmly adheres to the polypropylene layer; The outer layer of polypropylene provides high mechanical strength and resistance to environmental erosion. This structural synergy significantly enhances the anti-corrosion performance, especially suitable for harsh chemical and physical environments.

Cement mortar lined anti-corrosion steel pipe is a special type of anti-corrosion pipe material that undergoes anti-corrosion and wear-resistant treatment with cement mortar inside the pipe body. The mixed cement mortar is applied to the cleaned inner wall of the pipe in one or multiple times according to the design thickness requirements. After a certain period of curing, a high-strength circular shell lining layer is formed that is tightly bonded to the inner wall of the pipe.

3LPE anti-corrosion steel pipe refers to a three-layer structure polyolefin coating (MAPEC) external anti-corrosion steel pipe, generally referring to the anti-corrosion of the outer wall of the steel pipe. It usually consists of a three-layer structure: the first layer is epoxy powder (FBE), the thickness of which is generally not explicitly mentioned; The second layer is adhesive (AD) with a thickness of 170-250 μ m; The third layer is polyethylene (PE) with a thickness of 2.5-3.7mm. In practical operation, these three materials are mixed and integrated into one, and after processing, they are firmly combined with steel pipes to form an excellent anti-corrosion layer.

Enhanced 3PE anti-corrosion steel pipe is a corrosion-resistant steel pipe that is coated with 2 or 3 layers of polyethylene (3PE) on its outer wall to slow down or prevent the pipeline from being eroded and deteriorated by the chemical or electrochemical action of the external medium or the metabolic activity of microorganisms when used in different working environments. It consists of a three-layer structure, with the first layer being epoxy powder (FBE 100um), the second layer being adhesive (AD) 170-250um, and the third layer being polyethylene (PE) 1.8-3.7mm (reinforced grade). The three materials are integrated and firmly bonded with the steel pipe to form an excellent anti-corrosion layer.

Spiral seam submerged arc welding steel pipe process flow chart