Introduction of commonly used steel pipes-steel-plastic composite pipes,
large-diameter seamless steel pipes
The steel-plastic composite pipe is made of hot-dip galvanized steel pipe as the matrix, and the inner wall (the outer wall can be coated with plastic when needed) by powder fusion spraying technology, with excellent performance. Compared with galvanized pipe, it has the advantages of anti-corrosion, no rust, no fouling, smooth and smooth, clean and non-toxic, and long service life. According to tests, the service life of the steel-plastic composite pipe is more than three times that of the galvanized pipe. Compared with plastic pipes, it has the advantages of high mechanical strength, pressure resistance and heat resistance. Since the substrate is a steel pipe, there is no embrittlement or aging problem. It can be widely used in tap water, gas, chemical products and other fluid transportation and heating projects. It is an upgraded product of galvanized pipe. Because its installation and use method is basically the same as that of traditional galvanized pipes, the form of pipe fittings is also exactly the same, and it can replace aluminum-plastic composite pipes to play a role in large-caliber tap water transportation. It is welcomed by users and has become the most competitive in the pipeline market. One of the new products.
Coated steel pipe is made by coating plastic on the basis of large-diameter spiral welded pipe and high-frequency welded pipe. The maximum pipe diameter is 1200mm. It can be coated with polyvinyl chloride (PVC), polyethylene (PE) and epoxy according to different needs. Resin (EPOZY) and other plastic coatings with different properties, good adhesion, strong corrosion resistance, resistant to strong acids, strong alkalis and other chemical corrosion, non-toxic, non-corrosive, wear-resistant, impact-resistant, and strong penetration resistance , The surface of the pipeline is smooth and does not adhere to any material, which can reduce the resistance during transportation, increase the flow rate and transportation efficiency, and reduce the pressure loss of transportation. There is no solvent and no exudable substances in the coating, so it will not pollute the conveyed medium, so as to ensure the purity and hygiene of the fluid. It can be used alternately with cold and hot cycles in the range of -40℃ to +80℃, without aging, It does not crack, so it can be used in harsh environments such as cold regions.
Large-caliber seamless steel pipes are widely used in engineering fields such as tap water, natural gas, petroleum, chemicals, medicine, communications, electric power, and oceans.
