The plastic pipe is a new type of pipe material developed recently are domestic, the plastic protective layer, the middle as reinforced composite structure of welded steel tube or seamless bearing steel pipe, plastic pipe overcomes the pipes themselves are easy to rust, corrosion, high pollution, and plastic Guan Qiang degree is low, easy to deform, the integration of common advantages steel pipe and plastic products, plastic pipe belongs to the country to promote the use of environmentally friendly products.     Tianjin City Shengda Ruitong tube specializing in the production of: