Large-diameter thick-walled seamless pipeRefers to large-diameter thick-walled seamless pipes with an outer diameter of 159mm or more. Large-diameter coated steel pipes are made by applying plastic coatings to large-diameter spiral-welded pipes and high-frequency welded pipes, with pipe openings up to 1200mm in diameter. These thick-walled seamless pipes can be coated with various plastics such as polyvinyl chloride (PVC), polyethylene (PE), and epoxy (EPOZY) to meet different requirements, offering good adhesion, strong corrosion resistance, and tolerance to strong acids, alkalis, and other chemical attacks. They are non-toxic, non-corrosive, wear-resistant, shock-resistant, and have strong permeation resistance. The smooth surface of the pipes prevents adhesion of any substances, reducing resistance during transportation, increasing flow rate and efficiency, and minimizing pressure loss. The coatings contain no solvents or leachable substances, ensuring the purity and hygiene of the transported medium. They can be used for cold and hot cycling between -40℃ and +80℃, are not prone to aging or cracking, and can thus be used in harsh environments such as cold regions.Large-diameter thick-walled seamless pipeWidely used in engineering fields such as potable water, natural gas, oil, chemicals, telecommunications, electricity, and marine.