Steel lined pipe anti-corrosion coating uses domestically modified epoxy powder heavy-duty anti-corrosion coating, which features strong adhesion, smooth surface, resistance to corrosion, and no scaling. Pipe connections are made with special connectors, which are manufactured using special high-temperature insulation materials and processed through special technology. During on-site welding, heat cannot be directly transferred to the coating on the internal surface of the joint, ensuring the anti-corrosion layer remains intact and damage-free, thereby achieving anti-corrosion for the entire pipeline.