1. Raw material preparation
2. Steel pipe pretreatment (degreasing and rust removal, phosphating, drying)
3. Electrostatic spraying and plastic coating (electrostatic adsorption, high temperature curing)
4. Cooling and shaping (water cooling/air cooling)
5. Cutting and forming (fixed length cutting, pipe bending)
6. Accessory assembly (pre-installed buckles, ground plugs and other accessories)
7. Packaging and warehousing (double-layer protection of foam bags + woven bags to avoid scratching the plastic layer during transportation.)











