Quotation from manufacturers of inner and outer coated steel pipes

Description :

　　Coated steel pipes have strong acid, alkali, and corrosion resistance, and are suitable for high sulfur water quality and water containing calcium and magnesium plasma in coal mines. Due to its high surface smoothness, low fluid resistance, and no adhesion of scale, it can reduce secondary pollution. After coating, bonding, and curing on the inside and outside of the steel pipe, the adhesion is ≥ 30N/10mm, and there is no damage after impact and tearing with a hammer. The characteristics of coated steel pipes are light weight, smooth inner walls, low resistance, and good corrosion resistance. Compared with other metal pipes, plastic pipes, and composite pipes, coated steel pipes combine the characteristics of various pipelines, including the strength of steel pipes and the corrosion resistance, wear resistance, and low fluid resistance of plastic pipes. It is a green pipeline with high safety and hygiene strength and good bonding strength.

　　Coated composite steel pipes are divided into: hot-dip molding process, internal and external spraying process, rotational molding process, spray coating process, suction coating process, fusion bonding winding process, etc. Hot dip molding adopts fluidized bed immersion molding and one-time film-forming method. Also known as coated steel pipe * anti-corrosion, with polyethylene inside and outside. Internal and external spraying process: Using the theory of electrostatic adsorption, polyethylene or epoxy resin powder is sprayed by spraying through pre-treatment of steel pipes. Also known as the second-generation anti-corrosion coated steel pipe, it is a composite steel pipe made of internal and external epoxy. Spray coating process: also known as curtain method, which uses a sieve filled with powder to spray coating onto the outer wall of a heated steel pipe.

　　The development of coated steel pipes in the market is very rapid, but at the same time, we also have some understanding of their performance. According to personnel from coated steel pipe manufacturers, the production process and other aspects of coated steel pipes can be used under harsh conditions and have a long-term anti-corrosion life. Heavy duty anti-corrosion coatings can be used for 10 or 15 years or more in chemical, atmospheric and marine environments, even in acid, alkali, salt and solvent media, and under certain temperature conditions, they can be used for more than 5 years. Thick film coating is an important symbol of heavy-duty anti-corrosion coatings. It is a steel plastic composite product that uses steel pipes as the substrate and plastic powder as the coating material. A layer of plastic is melted and coated on the inner and outer surfaces, and a layer of plastic or other anti-corrosion coating is melted and coated on the surface. There are two types of internal coating materials, one is polyethylene coated steel pipe. Another type is epoxy resin coated steel pipe. The gas coated steel pipe is a three-layer PE coated steel pipe, with the first layer made of heavy-duty anti-corrosion modified epoxy resin and the outer layer made of spray coating products. The spray coating is evenly applied, with excellent quality, beautiful surface, and superior comprehensive performance. Especially, the coating has strong corrosion resistance and high temperature resistance, with good chemical stability and solubility of petroleum products. It can be used in a temperature range of 40 ℃ -90 ℃ for a long time. Coated steel pipe is a type of steel commonly used in our daily lives. Due to its corrosion resistance and low friction resistance, it is constantly adopted in daily life. Coated steel pipe manufacturers introduce the benefits of using coated steel pipes for mining.

　　Epoxy resin coated composite steel pipe fire coated composite steel pipe, with steel pipe as the base pipe, coated with high adhesion, impact resistance, anti-corrosion and weather resistant thermosetting powder coating on the outer wall, and high adhesion, anti-corrosion and food grade sanitary thermoplastic powder coating on the inner wall. Coated steel pipes combine the high strength of ordinary steel pipes with the anti-corrosion performance of plastic grease products. The compressive performance of the product reaches 0-5.0MPa and can be used for a long time at 0-110 degrees Celsius. The coating thickness is between 100 microns and 500 microns, usually 350 microns. The inner and outer plastic coated steel pipe is a steel plastic composite pipe made by dissolving a layer of organic compounds such as polyethylene (PE) resin, ethylene oxide copolymer (EAA), epoxy (EP) powder, non-toxic (PP) or non-toxic polyethylene (PVC) with a thickness of 0.5-1.0mm on the inner wall of the steel pipe. It not only has the advantages of high strength, easy connection, and water flow resistance of steel pipes, but also overcomes the disadvantages of steel pipes being prone to corrosion, pollution, scaling, low strength of plastic pipes, and poor fire performance when exposed to water. Its design life can reach 50 years. The main disadvantage is that bending is not allowed during installation, and during hot processing and welding cutting operations, the cutting surface should be coated with non-toxic room temperature curing adhesive provided by the manufacturer.

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• Internally and externally coated steel pipes