The outer 3PE inner epoxy anti-corrosion steel pipe is a new type of anti-corrosion steel pipe, which is coated with three layers of polyethylene (3PE) anti-corrosion coating on the surface and epoxy resin coating on the inner layer. It has excellent corrosion resistance and adhesion, which can effectively prevent corrosion inside the steel pipe. The outer 3PE inner epoxy anti-corrosion steel pipe also has the following characteristics: excellent anti-corrosion performance: due to the use of 3PE and epoxy resin coatings, the outer 3PE inner epoxy anti-corrosion steel pipe