630TPEP corrosion-resistant spiral welded steel pipe is a steel pipe widely used in water supply pipeline transmission engineering. It is made of three layers of polyethylene PE anti-corrosion on the outside and coated with white epoxy resin powder on the inside, which has excellent corrosion resistance performance. In order to ensure the quality and safety of products, steel pipe manufacturers must make markings in accordance with national standards to indicate that their products meet relevant requirements.