The production materials for plastic-coated composite pipes mainly consist of two parts: substrate and coating materials.
Substrate
Steel Pipe: As the primary substrate for plastic-coated composite pipes, steel pipes are required to possess good mechanical properties and welding performance. The material of steel pipes can be selected according to specific use requirements, such as commonly used steel grades like Q235B and Q345B. The diameter, wall thickness, and other size specifications of steel pipes also need to be determined based on product design requirements.
Coating Materials
Plastic Powder: This mainly includes thermoplastic or thermoset plastic powders such as polyethylene (PE) and epoxy resin (EP). These materials exhibit excellent corrosion resistance, aging resistance, and adhesion, which are crucial for the corrosion resistance of plastic-coated composite pipes.
Polyethylene (PE): Due to its superior low-temperature resistance, chemical stability, aging resistance, and electrical insulation properties, PE is widely used in the production of plastic-coated composite pipes.
Epoxy Resin (EP): It boasts excellent physical and mechanical properties, electrical insulation properties, chemical corrosion resistance, and strong bonding ability, making it one of the commonly used coating materials for plastic-coated composite pipes.
Other Auxiliary Materials: During the production process of plastic-coated composite pipes, some auxiliary materials may also be required, such as curing agents and diluents. These materials are mainly used to adjust the properties of coating materials or improve the coating process.
