Introduction to TPEP anti-corrosion steel pipe manufacturers

Description :

　　There are two representative coating methods for TPEP anti-corrosion steel pipe manufacturers: spraying and vacuum suction coating: 1. internal spraying and 2. vacuum suction coating. Vacuum suction coating is generally used for the inner wall coating of pipes and bends. The process flow of inner wall suction coating, vacuum suction coating belongs to thermal coating technology. After mixing with air, the powder enters the pipeline and melts and adheres to the surface of the high-temperature pipe wall when it comes into contact with it. During the suction process, the airflow carries away some of the heat from the tube wall, causing its temperature to decrease and the amount of powder adhesion to decrease, even to the point where it cannot adhere. Therefore, the preheating temperature of the pipeline has a significant impact on the thickness of the coating. The thickness of the coating film only slightly increases with the increase of powder supply during suction coating. Due to the excessive supply of powder coating during vacuum suction coating, the excess powder is sucked into the recovery device, so the amount of powder excess has little effect on the thickness. The thickness of the coating is very sensitive to the powder supply time. Under the same conditions, the longer the powder supply time, the thicker the coating. During the suction coating process, the temperature of the pipeline continuously decreases due to heat dissipation, powder absorption, and the heat carried away by the suction airflow. When the temperature of the pipe wall drops to the point where it is difficult to melt and stick the powder, even if the powder supply time is long, the coating thickness cannot increase. In production and construction, with changes in factors such as pipe diameter, batch size, and production pace, relevant process parameters should be adjusted accordingly to obtain satisfactory coating.

　　TPEP anti-corrosion steel pipe composite steel pipeline: The Chinese name is, externally wrapped polyethylene and internally fused epoxy anti-corrosion steel pipe, which is the fourth generation anti-corrosion technology for long-distance water transmission pipelines. As its full Chinese name indicates, the outer wall of the pipeline adopts a 3-layer PE structure anti-corrosion technology wrapped with polyethylene, and the inner wall adopts hot-melt epoxy anti-corrosion treatment. Use standards to meet food grade standards. It is a truly high-quality anti-corrosion pipeline for transportation. Whether it is the anti-corrosion treatment technology inside or outside the pipeline, it has reached the current level and the service life can reach up to 50 years. Introduction to the characteristics of TPEP anti-corrosion coating for steel pipes: The superior performance of TPEP coating is mainly due to its organic combination of bottom layer epoxy powder, middle layer adhesive, and outer layer polyethylene, which gives the coating the advantages of fusion bonded epoxy powder (FBE) coating and polyethylene coating. Fusion bonded epoxy forms ionic bonds and physical interlocking forces with activated ions on the surface of steel pipes through its active groups, enabling it to firmly adhere to the metal substrate surface. The copolymer adhesive prepared by modifying polyethylene not only has the ability to form covalent bonds (ester bonds) with fusion bonded epoxy through chemical reactions, but also disrupts the electronic dipole balance of polyethylene material through grafting modification, enhancing the intermolecular strength between fusion bonded epoxy and copolymer molecules, effectively improving the interfacial bonding strength between the two. TPEP anti-corrosion steel pipe refers to a steel pipeline that has been processed through anti-corrosion technology, which can effectively prevent or slow down the occurrence of chemical or electrochemical reactions and corrosion during transportation and use.

　　The steel demand in March fell short of expectations, mainly due to downstream delays in procurement. Merchants were forced to tighten their funds due to high inventory, causing steel prices to fall from high levels, further exacerbating downstream wait-and-see sentiment. As steel prices fell below the winter storage cost line for businesses, downstream purchases were concentrated at the end of March, and demand recovered to the level expected during peak season, resulting in a rebound in steel prices from oversold. According to monitoring, the national steel social inventory this week was 16.802 million tons, a decrease of 6.5% compared to the previous week, and continued to decline for four weeks, with the decline gradually expanding and an increase of 19% compared to the same period last year. Among them, the inventory in the building materials market was 12.017 million tons, a decrease of 7.3% compared to the previous week; The inventory of the sheet metal market was 4.785 million tons, a decrease of 4.4% on a weekly basis. According to a survey conducted at the end of March on the profitability of major blast furnace production enterprises nationwide, the profit of rebar was 427 yuan/ton, a decrease of 298 yuan/ton from the previous month, the profit of hot coil was 353 yuan/ton, a decrease of 164 yuan/ton from the previous month, and the profit of medium and thick plate was 529 yuan/ton, a decrease of 59 yuan/ton from the previous month. Overall, on the one hand, it is expected that demand in April will be significantly better than in March, and the supply and demand pressure in the steel market will ease, with steel inventories continuing to decline. On the other hand, the trade friction between China and the United States is heating up again, coupled with the decent profits of steel mills, high production levels, and further digestion of high inventory, the market mentality remains cautious. It is expected that steel prices will fluctuate and fluctuate next week.

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