3PE anti-corrosion steel pipe reinforced grade 3PE anti-corrosion steel pipe 2pe large-diameter seamless steel pipe

Description :

　　3PE anti-corrosion steel pipe refers to a three-layer structure polyolefin coating (MAPEC) external anti-corrosion steel pipe, which is a commonly used anti-corrosion pipeline in China. Other anti-corrosion methods include IPN8710, FBE epoxy powder, epoxy coal tar, etc. One Product standard: The standard mainly specifies polyethylene and high-density polyethylene, with a Vicat softening point set at not less than 110 ℃; The thickness of the external anti-corrosion layer is determined according to the German standard DIN30670-1991, which mainly uses low and medium density polyethylene, greatly improving the impact strength of the 3PE anti-corrosion layer. II Product structure: One layer of epoxy powder (FBE>100um), two layers of adhesive (AD), 170-250um, three layers of polyethylene (PE), 2.5-3.7mm. 3PE anti-corrosion steel pipes have superior characteristics such as light bulk density, high strength, sound insulation, flame retardancy, cold resistance, anti-corrosion, non water absorption, and fast construction. They have become indispensable materials for thermal anti-corrosion, waterproof sealing, and sealing in industries such as construction, transportation, chemical, power, refrigeration, etc. 3PE anti-corrosion steel pipe is used for anti-corrosion and cold insulation engineering of various indoor and outdoor pipelines, combined heating pipelines, local air conditioning pipelines, chemical and other industrial pipelines. Overview: Since the emergence of 3PE decomposition materials in the 1930s, 3PE foam anti-corrosion pipes have been rapidly developed as a superior thermal anti-corrosion material. Their application scope has become increasingly common, and they are widely used in various pipelines such as heating, cooling, oil transportation, and steam transportation due to their complex construction and clear energy-saving and anti-corrosion effects. Used in large quantities for various pipelines such as heating, cooling, oil transportation, and steam transportation. 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 pipes (GB 8-163-87) and spiral welded pipes (GB9711-88) for the steel pipe layer according to the intention and customer's request; SY/T503 octa-92) and straight seam welded pipe (GB3092-93). After the previous rust removal process, the rust removal grade of the steel pipe can reach Sa2 level according to GB 8923-19 88 standard, and the precision of the outer surface can reach R=12.5 microns according to GB6060.5-88 standard. The second layer of pipeline anti-corrosion: the 3PE anti-corrosion layer is made by injecting the original liquid of rigid 3PE foam plastic 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 polyurethane foam is selected as the anti-corrosion coating. The 3PE anti-corrosion steel pipe is made by chemically reacting and foaming with polyether multi combination materials and multiple polyisocyanates. The third layer of pipeline anti-corrosion: The high-density polyethylene protective layer is prefabricated into a colored (yellow) plastic pipe with a fixed wall thickness. Its infection 1 is to protect the 3PE anti-corrosion layer from being crushed by stagnant hard objects, and 2 is anti-corrosion and waterproof. The utilization of 3PE anti-corrosion steel pipes is aimed at the anti-corrosion and cold insulation engineering of various media transported within the range of -50 ℃ to 150 ℃. It is widely used in anti-corrosion and cold insulation projects for rural heating, warm rooms, cold storage, coal mines, ports, chemical industries, and other industries. Pipeline anti-corrosion has the advantage of reducing project cost. According to the calculation of attacking and capturing the entire pipeline, the double bundle heating pipeline can reduce the project cost by 25% (using fiberglass as the protective layer) and 10% (using high-density polyethylene as the protective layer) under normal conditions. 2. Low heat consumption and energy conservation. Its thermal conductivity is: λ=0.013-0.03kal/m? h?oC， Compared to other commonly used pipeline anti-corrosion materials in earlier years, the anti-corrosion effect has improved by 4-9 times. Moreover, its water absorption rate is very low, about 0.2kg/m2. The reason for low water absorption is that the closed cell ratio of 3PE foam is up to 92%. Low thermal conductivity and low water absorption, combined with high-density polyethylene or fiberglass shell with good anti-corrosion layer and surface waterproofing function, have greatly improved the overall heat dissipation of the heating pipeline by rotating the environment of the rigid trench laying heating pipeline "wet cotton jacket". The heat loss of the heating network is 2%, which is less than the overseas standard of 10%. 3PE anti-corrosion, good edge function, long holding life. Because 3PE hard foam anti-corrosion coating is tightly bonded to the steel pipe skin, it can play a low-grade anti-corrosion infection. At the same time, its foam pores are all closed, and its water absorption is very low. The high-density polyethylene shell and fiberglass shell both have poor anti-corrosion and coagulation functions. Therefore, the outer layer of the task steel pipe is well influenced by the external atmosphere and water. As long as the water quality inside the pipeline is treated well, the control life can reach more than 50 years, which is 3-4 times longer than the rigid trench laying and overhead laying. 4. Pipeline anti-corrosion. Less land occupation, faster construction, and unfavorable environmental protection. The anti-corrosion of directly buried heating pipelines does not require the construction of large trenches. As long as the anti-corrosion pipes are buried in the dark, it greatly increases the land occupation of the project, increases the excavation volume by about 50%, and increases the construction and concrete volume by 90%. At the same time, the processing of anti-corrosion pipes and the excavation of trenches on site can shorten the construction period by more than 50% as long as on-site exploration is conducted

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