Plastic composite pipe generally use the outer layer of galvanized steel or black iron pipe as the matrix, the inner layer of food-grade epoxy resin, the outer layer of modified epoxy powder coating, with advanced technology, including the outer wall melted, spraying or Adsorption epoxy powder coating and high temperature curing new composite pipe, water pipe replacement as an ordinary product, it has both steel pipe, pipe fittings strength and stiffness, but also has a plastic pipe inner wall is very smooth, self-lubricating, not students rust, scaling, fluid resistance, resistance to abrasion, corrosion, good antibacterial properties and flexibility advantages. Coated steel is widely used in high-rise building water supply and drainage, the first anti-sprinkler, HVAC, cables and external corrosion, industrial systems, circulating water system, go to the lining of pure water system, anti-fouling antimicrobial preservative systems, internal and external corrosion protection system and lined steel / plastic composite pipe compared: plastic composite pipe linear expansion coefficient lower, indented trails, plus food-grade epoxy resin is a polar material, with a strong binding force of steel, not long at room temperature appears separated off phenomenon, in particular, has better performance in terms of anti-thermal expansion and contraction, weather resistance is better. In terms of buried pipe, Jinhua engineers to overcome the difficulties, overcome technical bottlenecks to produce multiplexed within the outer coating layer structure EP EP (or PE) composite pipe, fully meet the water supply, gas pipes and other buried laying use, and can be installed using traditional methods, the construction is very convenient.