Coated steel pipes are formed by coating plastic based on large-diameter spiral welded pipes and high-frequency welded pipes, with a maximum diameter of 1200mm. Coated steel pipes can be coated with polyvinyl chloride (PVC), polyethylene (PE) according to different needs, epoxy resin (EPOZY), and other plastic coatings with different properties, good adhesion, strong corrosion resistance, resistant to strong acid, strong alkali and other chemical corrosion, non-toxic, non-rust, wear-resistant, impact-resistant, resistant Strong permeability, smooth pipe surface, no adhesion to any substance, can reduce resistance during transportation, improve flow and transportation efficiency, and reduce transportation pressure loss. There is no solvent and no excludable substances in the coating, so it will not pollute the conveyed medium, thus ensuring the purity and hygiene of the fluid. The coated steel pipe can be used alternately in cold and hot cycles in the range of -40°C to +80°C. It does not age or crack, so it can be used in harsh environments such as cold regions. Large-diameter coated steel pipes are widely used in tap water, natural gas, petroleum, chemical industry, medicine, steel pipe, communication, electric power, marine, and other engineering fields.
