3PE anti-corrosion spiral pipe manufacturer

3PE anticorrosive spiral steel pipe is a kind of external anticorrosive steel pipe with three-layer structure polyolefin coating (mapec), which is commonly used in China. 3PE anti-corrosion spiral steel pipe anti-corrosion structure: the first layer of epoxy powder (FBE > 100um), the second layer of adhesive (AD) 170-250um, the third layer of polyethylene (PE) 2.5-3.7mm. The three materials are integrated and firmly combined with the steel pipe to form an excellent anticorrosive coating. The pipe diameter ranges from Φ 60 to Φ 1420. 2PE anticorrosive pipeline has two layers of PE anticorrosive structure, the first layer of adhesive (AD), the second layer of polyethylene (PE), two materials are integrated, and the thickness of each layer is the same as three layers of PE. The production process is as follows: the bare pipe is shot blasted by medium frequency heating, and then heated again after derusting inspection. When it reaches a certain temperature for spraying, powder spraying is carried out first, then paste spraying, and finally polyethylene spraying. Strictly carry out spray leakage detection. This is basically the production process. 3PE anti-corrosion spiral steel pipe is widely used in petroleum, chemical industry, natural gas, heat, sewage treatment, water source, bridge, steel structure, marine water delivery and piling and other pipeline engineering fields.   The service life of the buried pipeline with 3PE anticorrosion technology can be up to 50 years. The anti-corrosion coating of 3PE steel pipe is very important for the service life of buried pipeline. Some pipes of the same material have been buried underground for decades without corrosion, and some have been leaking for several years. It's because they use different coating. 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 structure protective layer with a total thickness of about 1.8-3.7mm. In the three-layer structure, the main functions of the fusion bonded epoxy powder coating are: to form a continuous coating, to directly bond with the steel pipe surface, to have good chemical resistance and cathodic stripping resistance; to react with the active group of the adhesive in the middle layer to form a chemical bond, to ensure that the overall anti-corrosion coating has good adhesion at a higher temperature. The middle layer is usually a copolymer adhesive, and its main component is polyolefin. At present, vinyl copolymer adhesive is widely used. The polar functional group of copolymer adhesive can react with the epoxy group of fusion bonded epoxy powder coating to form hydrogen bond or chemical bond. It makes the middle layer and the bottom layer form a good bond, while the non-polar ethylene part and the surface layer polyethylene have a good affinity, so the middle layer and the surface layer also have a good bond performance 2PE / 3PE anticorrosive pipe, which is suitable for underground water supply and drainage, underground slurry spraying, positive and negative pressure ventilation, drainage, fire sprinkler and other pipe networks.   Process water waste residue and return water transmission pipeline of thermal power plant. It has excellent applicability for the water supply pipeline of anti spray and sprinkler system. Power, communication, highway and other cable protection sleeve. It is suitable for high-rise building water supply, heat supply network, water works, gas transmission, buried water transmission and other pipelines. Petroleum pipeline, chemical industry, printing and dyeing and other industries to transport corrosive media process pipeline. Sewage treatment discharge pipe, sewage pipe and biological pool anti-corrosion engineering. It can be said that 3PE anti-corrosion steel pipe is indispensable in the current construction of agricultural irrigation pipe, deep well pipe, drainage pipe and other network applications, and it is believed that through the extension of science and technology, it will still have more brilliant achievements in the future. This year, the release of market demand is later than expected. The acceleration of market demand starts from late March, and runs through the whole April. High frequency data shows that the steel turnover and outbound volume in April are out of season. From March 30 to April 27, the inventory of screw steel has dropped about 550000 tons for five consecutive weeks. After May, the temperature of the whole country has risen significantly, the precipitation in the middle and lower reaches of the Yangtze River and South China has increased, and the outdoor construction of the terminal project has been affected. According to the sales volume of thread in the first ten days of May, the inventory drop for three consecutive weeks is about 480000 tons, which shows that the demand for downstream procurement has weakened. In the middle of June, there will be a hot and rainy season, and the market demand will further weaken due to the busy farming and the shortage of funds in the middle of the year. The company has a strong industrial production equipment, can undertake anti-corrosion insulation pipe engineering thickness based on low and medium density polyethylene.