Cast Iron Pipe Production Process Features: After strict surface treatment, the product is passed through a heating process conveyor line and electrostatic spraying equipment to adhere (epoxy paint) powder to the inner and outer walls, resulting in a tough, durable coating with strong adhesion, a variety of colors, and a good decorative appearance. The product requires no further anti-corrosion maintenance throughout its lifetime, reducing maintenance costs and extending the service life of the product.