Large diameter thick-walled seamless pipeLarge diameter thick-walled seamless pipes with an outer diameter of 159mm or more. These large diameter coated steel pipes are made by applying plastic coatings to large diameter spiral-welded pipes and high-frequency welded pipes, with the large pipe end diameter reaching 1200mm. These thick-walled seamless pipes can be coated with various plastics such as polyvinyl chloride (PVC), polyethylene (PE), and epoxy resin (EPOZY) to meet different requirements, offering good adhesion, strong corrosion resistance, and resistance to strong acids, alkalis, and other chemical corrosion. They are non-toxic, non-corrosive, wear-resistant, impact-resistant, and have strong permeation resistance. The pipe surface is smooth, free from adhesion to any substances, reducing resistance during transportation, increasing flow rate and efficiency, and minimizing pressure loss. The coatings contain no solvents or leachable substances, ensuring that the transported medium remains uncontaminated, thus maintaining fluid purity and hygiene. They can be used for cold and hot cycling between -40℃ and +80℃, without aging or cracking, making them suitable for use in harsh environments such as cold regions.Large diameter thick-walled seamless pipeWidely applied in engineering fields such as potable water, natural gas, oil, chemicals, telecommunications, electricity, and marine.