Price of 3pe anti-corrosion steel pipe for gas pipeline

Description :

　　The company currently has three internationally advanced 3PE (three-layer polyethylene coating) steel pipe anti-corrosion production lines and two plastic coated composite steel pipe production lines, producing 2PE/3PE anti-corrosion steel pipes, 2PP/3PP anti-corrosion steel pipes, FBE/2FBE anti-corrosion steel pipes, epoxy coal tar anti-corrosion steel pipes, ipn8710 anti-corrosion steel pipes, HT515 anti-corrosion steel pipes, tpep anti-corrosion steel pipes, SEBF anti-corrosion steel pipes, outer 3pe and inner ep anti-corrosion steel pipes, epoxy resin anti-corrosion steel pipes, cement mortar lined steel pipes, epoxy ceramic anti-corrosion steel pipes, polyurea anti-corrosion steel pipes, polyamide anti-corrosion steel pipes, epoxy mica anti-corrosion steel pipes, epoxy red lead anti-corrosion steel pipes, epoxy iron red anti-corrosion steel pipes, epoxy solvent-free anti-corrosion steel pipes, high temperature anti-corrosion steel pipes, heavy-duty anti-corrosion steel pipes, plastic coated steel pipes, socket pipes. Plastic coated steel pipes, plastic lined steel pipes, cable conduits, anti-corrosion fittings, etc.

　　Anti corrosion pipe fittings mainly include anti-corrosion elbows, anti-corrosion tees, anti-corrosion tees, anti-corrosion elbows, anti-corrosion reducers, etc. The anti-corrosion pipe fittings mainly adopt the radiation cross-linked polyethylene heat shrinkable tape anti-corrosion process. Steel pipe anti-corrosion radiation cross-linked polyethylene heat shrink tape is a new type of anti-corrosion material for steel pipe welds with good performance and easy operation. It is composed of a double-layer material of substrate and hot melt adhesive layer. The main standards are SY/T0413-2002 Technical Standard for Polyethylene Anticorrosive Coating of Buried Steel Pipeline, SY/T4054-2003 Radiation cross-linked polyethylene heat shrinkable tape (set), SY/T0415-1996 Technical Standard for Rigid Polyurethane Foam Anticorrosive and Thermal Insulation Layer of Buried Steel Pipeline. The material of anti-corrosion pipe fittings is mainly carbon steel, which is suitable for oil and gas transportation engineering and chemical industry.

　　The three-layer structure protective layer of polyethylene with 3PE anti-corrosion, also known as three-layer PE (3PE), is an advanced anti-corrosion technology introduced from the international market in recent years. 3PE anti-corrosion steel pipes require anti-corrosion coatings with good resistance to soil, water, and mold corrosion and construction performance. Has good electrical insulation properties. When used in conjunction with cathodic protection, the anti-corrosion coating should have a certain degree of resistance to cathodic peeling strength. Has sufficient mechanical strength. To ensure that the coating is not damaged during handling and soil pressure. One of the most common methods for anti-corrosion steel pipes is to evenly and densely apply paint on the surface of the rust removed anti-corrosion steel pipe to isolate it from various corrosive media. 3PE anti-corrosion is now considered an advanced pipeline external anti-corrosion technology internationally. In China, three-layer PE has been first applied in the oil and gas system. The Shaanxi Beijing natural gas pipeline and Kushan oil pipeline that have been built in China, as well as the nearly 4000 kilometers of West East Gas Pipeline, which is a national key project, have all been coated with three layers of PE external anti-corrosion coating. In Tianjin, there is a 67 kilometer high-pressure pipeline from Shaanxi to Tianjin and a 30 kilometer high-pressure natural gas pipeline on the outer ring road. The 3PE anti-corrosion steel pipe coating, also known as the three-layer polyethylene anti-corrosion coating, is a new type of anti-corrosion steel pipe coating that combines the European 2PE anti-corrosion coating with the widely used epoxy powder anti-corrosion steel pipe coating (FBE) in North America. It has been recognized and used internationally for over ten years.

　　The anti-corrosion coating of 3pe anti-corrosion steel pipes is crucial for the service life of buried pipelines. For pipelines of the same material, some may not corrode after being buried underground for decades, while others may leak within a few years. It's because they use different external anti-corrosion coatings. Polyethylene three-layer structure protective layer, also known as three-layer PE (3PE), is an advanced anti-corrosion technology introduced from abroad in recent years. Its full name is fusion bonded epoxy/extruded polyethylene structural protective layer, which consists of the following three layers: the bottom layer is fusion bonded epoxy (80m); The middle layer is adhesive (170-250m); The surface layer is extruded polyethylene (about 2mm). The total thickness of the protective layer is about 1.8-3.7mm. In the three-layer structure, the main function of the fusion bonded epoxy powder coating is to form a continuous coating film, which is directly bonded to the surface of the steel pipe and has good chemical corrosion resistance and cathodic stripping resistance; Reacts with the active groups of the intermediate layer adhesive to form a chemical bond, ensuring that the overall anti-corrosion layer has good adhesion at higher temperatures. The intermediate layer is usually a copolymer adhesive, which is mainly composed of polyolefin. Currently, ethylene based copolymer adhesives are widely used.

　　Execution standards and performance characteristics of CHY-3 series products of heat shrinkable winding tape; The product structure is divided into three layers (referred to as 3PE): the inner layer is a two-component solvent-free epoxy resin primer applied to the surface of the steel pipe, the middle layer is a high-performance anti-corrosion hot melt adhesive, and the outer layer is a specially modified high-density polyethylene substrate. When using a two-layer structure heat shrinkable tape (2PE), epoxy resin primer is not required.

　　The three-layer PE anti-corrosion process is a commonly used steel pipe anti-corrosion process both domestically and internationally. The three-layer PE anti-corrosion structure consists of the following three layers: the bottom layer is fusion bonded epoxy (-80 μ m); The middle layer is adhesive (-250 μ m); The surface layer is extruded polyethylene (about 2mm). The total thickness of the protective layer is greater than 2.2-2.9mm. In the three-layer structure, the main function of epoxy primer is to form a continuous coating, directly bond with the surface of the steel pipe, and have good chemical corrosion resistance and cathodic stripping resistance; Reacts with the active groups of the intermediate layer adhesive to form a chemical bond, ensuring that the overall anti-corrosion layer has good adhesion at higher temperatures. The intermediate layer is usually a copolymer adhesive, which is mainly composed of polyolefin. Currently, ethylene based copolymer adhesives are widely used. The polar functional groups of the copolymer adhesive can react with the epoxy groups of the epoxy primer to form hydrogen bonds or chemical bonds, forming a good bond between the intermediate layer and the bottom layer; The non-polar ethylene portion has a good affinity with the surface layer polyethylene, so the intermediate layer also has good bonding performance with the surface layer. The main function of polyethylene surface layer is to provide mechanical protection and anti-corrosion, which is the same as the traditional two-layer structure polyethylene anti-corrosion layer. The 3PE anti-corrosion steel pipe production line can be applied to single-layer FBE, double-layer FBE, double-layer PE, double-layer PP, and 3PE anti-corrosion operations of steel pipes. The production line includes a steel pipe transmission system, an internal and external surface rust removal treatment system, a pipe dust removal system, a steel pipe heating system, an electrostatic spraying system, a coating system, a water cooling system, an end cutting groove system, hydraulic and pneumatic systems, a detection system, and an electrical control system.

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