Price of 3pe anti-corrosion steel pipe manufacturer for oil transportation

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. 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 (≥ 80 μ m), the middle layer is adhesive (170-250 μ m), and the surface layer is extruded polyethylene (about 2mm). The total thickness of the protective layer is about 1.8-3.7mm.

　　3pe anti-corrosion steel pipe anti-corrosion is divided into three layers from inside to outside. The first layer of pipeline anti-corrosion is the task of selecting seamless pipe spiral welded pipe and straight seam welded pipe for the steel pipe layer according to the intention and customer's request. After being treated with advanced rust removal technology, the rust removal grade of the steel pipe can reach Sa2 level in the 88 standard, and the precision of the outside can reach r=12.5 microns in the 88 standard. The second layer of pipeline anti-corrosion: the 3pe anti-corrosion coating is made by injecting the original liquid of rigid 3pe foam plastic once into the cavity formed between the steel pipe and the outer protective layer with a low-pressure foaming machine. It is commonly known as the "pipe in pipe foaming process". Its infection 1 is waterproof, 2 is anti-corrosion, and 3 is to support the self weight of the heating network. When the temperature of the conveying medium is -50 ℃ -120 ℃, rigid polyurea foam plastic is selected as the anti-corrosion coating. The overall iron ore market is in a state of volatile operation. According to the report, in the domestic mineral market, the price of iron concentrate powder in Hebei region is basically stable, and steel mills are generally cautious in their procurement. The price of imported ore first rose and then fell. As of the 12th, the price of 62% grade imported iron ore was 64.75 yuan per ton, an increase of 1.75 yuan per week. Although steel mills have increased their inventory replenishment and port iron ore inventories have decreased to a certain extent, the upward momentum of mineral prices is still insufficient. 3PE anti-corrosion steel pipes are used in different working environments. In order to slow down or prevent the corrosion and deterioration of the pipeline under the chemical and electrochemical action of the external medium or the metabolic activity of microorganisms, 2 or 3 layers of polyethylene (3PE) are coated on its outer wall to achieve pipeline anti-corrosion. The service life of 3PE anti-corrosion pipes is extended by 3-5 times. The bottom layer is fusion bonded epoxy (≥ 80 μ m), the middle layer is adhesive (170-250 μ m), and 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, 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 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 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. As one of the most expensive anti-corrosion pipelines, 3PE anti-corrosion spiral steel pipe is one of them. However, its advantages in maintenance costs and service life are incomparable to other buried anti-corrosion pipelines. Its value in the later stage is definitely worth investing in in the early stage. The Qingdao oil pipeline explosion incident has brought certain shock and panic to people and citizens. In densely populated cities, the strength, insulation, and safety of 3pe anti-corrosion steel pipes are more prominent. To ensure the safe operation of natural gas pipelines, 3pe anti-corrosion steel pipes must be used for underground pipelines such as urban water supply and drainage, telecommunications, gas, and electricity. They are like the "blood vessels" and "nerves" in the human body, providing strong support for urban development and can be called the "lifeline" of the city. What is the distribution of underground pipelines? Relevant sources have learned that many cities in China are conducting a large-scale survey of underground pipelines in urban areas, with each underground pipeline's distribution and direction being surveyed and determined one by one. Electronic archives are established to achieve information sharing. We have already discussed a lot about the relevant knowledge of 3PE anti-corrosion steel pipes, which is almost comprehensive. Today, we will once again explain the pipeline structure and related properties of 3PE anti-corrosion steel pipes. Among them, the structure of 3PE anti-corrosion steel pipes: * layer of epoxy powder (FBE>100um), the second layer of adhesive (copolymer adhesive) 170-25um, and the third layer of polyethylene (PE) 2.5-3.7mm. These three materials are tightly integrated together and firmly combined with the steel pipe to form an excellent anti-corrosion layer.

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