Manufacturer of 3pe anti-corrosion steel pipes for chemical and pharmaceutical industries

Description :

　　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. Has good adhesion. 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 fusion bonded epoxy powder coating 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 base materials for wrapped 3PE anti-corrosion steel pipes include seamless steel pipes, spiral steel pipes, and straight seam steel pipes. Anti corrosion pipelines can be divided into two categories: inner lining anti-corrosion steel pipes and outer wall anti-corrosion steel pipes. The main anti-corrosion methods for lining include cement mortar lining anti-corrosion steel pipes, which are widely used and have lower costs. Cement mortar lining anti-corrosion steel pipes use a cement mortar anti-corrosion layer to prevent corrosion of the pipeline. The commonly used external anti-corrosion pipeline is the 3pe anti-corrosion pipeline. Anti corrosion technology is the process of covering the outer or inner wall of steel pipes with anti-corrosion coatings to protect the pipeline itself. It can process various types of pipes such as straight seam steel pipes and spiral steel pipes. In order to prevent accidents such as personal injury and property loss caused by the transportation of flammable and toxic fluids, the spiral steel pipe factory adopts corresponding process standards, continuously meets important performance operations, and ensures quality and safety in the testing and measurement process for use in the market.

　　The processing methods for wrapped 3PE anti-corrosion steel pipes are generally divided into two types: wrapped and circular mold wrapped. The three-layer structure polyethylene anti-corrosion coating (3PE) combines the excellent properties of fusion bonded epoxy powder coating and extruded polyethylene anti-corrosion coating. It combines the interface characteristics and chemical resistance of fusion bonded epoxy powder coating with the mechanical protection characteristics of extruded polyethylene anti-corrosion coating, thereby significantly improving their respective performance. Therefore, as an external protective layer for buried pipelines, it is very superior. According to relevant information, three-layer PE can extend the lifespan of buried pipelines to 50 years, and is currently considered an advanced external anti-corrosion technology for pipelines.

　　3PE， The bottom layer is epoxy powder coating, and the middle layer is adhesive, made of polyethylene. 3PE anti-corrosion steel pipes are divided into ordinary grade and reinforced grade. Their fundamental difference lies in the thickness, which is around 2.0mm for common specifications 219-478, while the reinforcement level is around 2.7mm. Their prices differ by about 7 yuan per square meter. The choice of anti-corrosion grade depends on the specific requirements of the customer. If it is used for ordinary casing external anti-corrosion, ordinary grade is more than sufficient. If it is used for direct fluid flow, such as acid and alkali, natural gas, etc., reinforced grade should be used as much as possible. With the discovery of new natural gas fields in China every year and the progress of the West East Gas Pipeline Project, the demand for natural gas transportation pipelines is also rapidly increasing. Every year, China suffers losses of up to 10 billion yuan in oil and gas pipeline corrosion. Since the use of 3PE anti-corrosion steel pipes in natural gas pipelines, China has reduced corrosion losses by at least 70%. 3PE anti-corrosion steel pipes not only reduce losses, but also have safe and corrosion-resistant properties. Various countries widely use 3PE anti-corrosion steel pipes in sea, land, and air transportation vehicles, oil, gas, water pipelines, and various industrial equipment and facilities.

　　The wrapped 3PE anti-corrosion spiral steel pipe combines the excellent performance of single-layer food grade epoxy resin and polyethylene coatings, improving the strength of the coating system's resistance to cathodic peeling and adhesion, and meeting the requirements of * * operating temperature (90 ℃). The three-layer polyethylene anti-corrosion coating has outstanding mechanical protection and bonding properties. It can withstand the stress caused by soil movement due to vibration and temperature changes, and resist the impact stress generated by sharp stones acting on the surface of the pipeline. _The resistance of the three-layer polyethylene anti-corrosion coating is relatively high, which will greatly reduce the installation and maintenance costs of the cathodic protection system. Its characteristics include high mechanical strength, wear resistance, corrosion resistance, heat resistance, cold resistance, and can be applied to media at 150 degrees Celsius, making it suitable for use in cold regions. Product structure: * layer epoxy powder (FBE>100um). The second layer of adhesive (AD) is 170 to 250um. The third layer of polyethylene (PE) is 2.5 to 3.7mm.

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