Coated steel pipe, also known as coated composite steel pipe, is a type of steel plastic composite steel pipe formed by fusing a layer of epoxy coating on the inner and outer surfaces of a spiral steel pipe, straight seam welded pipe, and seamless steel pipe as the base material, with anti-corrosion materials such as epoxy powder as the coating. Fusion bonded epoxy powder inner and outer coatings are a new type of anti-corrosion coating developed in recent decades, which uses electrostatic spraying technology to apply epoxy powder coatings and form a film in one go. This coating has the characteristics of simple coating operation, no pollution, good impact and bending resistance, and high temperature resistance,It has been widely applied abroad.

The main coating methods for FBE powder include electrostatic spraying, thermal spraying, suction method, fluidized bed method, etc. The coating inside the pipeline generally adopts frictional electrostatic spraying method, suction method or thermal spraying method; The external coating of pipelines generally adopts electrostatic spraying method; Irregular parts are treated using fluidized bed method or electrostatic spraying method. These spraying methods all have a common feature, which is that the workpiece needs to be preheated to a certain temperature before spraying, so that the powder melts as soon as it comes into contact, and the residual heat continues to flow the coating, further leveling and covering the entire surface of the steel pipe, especially in the depressions on the surface of the steel pipe and on both sides of the weld seam. The melted coating flows into and fills the surface, making the coating tightly bond with the steel pipe, minimizing pores, and solidifying within the specified time. Then, the solidification process is terminated by cooling with water.

• Green, environmentally friendly and hygienic, suitable for drinking water transmission pipelines;
• High temperature and corrosion resistance,Suitable for hot water and sewage pipelines；
• Resistant to high pressure and rust, suitable for fire water pipes;
• Corrosion resistant to acid, alkali, and salt, suitable for chemical fluid transportation pipelines;
• Smooth insulation,Applicable toProtective conduit for wires and cables;
  
• Good impact resistance and sealing, can be used for mine ventilation pipes and water supply and drainage pipes;