Good corrosion resistance: steel plastic composite pipe inner wall plastic layer has strong adhesion, high density, good corrosion resistance, can effectively extend the life of the pipe. Good mechanical strength: steel plastic composite pipe has the same advantages of mechanical strength with hot-dip galvanized steel, with a strong endurance on impact, bending and external influence of pressure. Good hygiene performance: it uses the plastic player formed by polyethylene or epoxy powder, non-toxic, odorless, no pollution of water, comply with national safety standards for drinking water equipment and protective materials. Small fluid resistance: steel plastic composite pipe wall is smooth, the friction coefficient is small, easy to accumulate scale, small fluid resistance, the water flow is not blocked.