Because the fusion bonded epoxy powder anticorrosive coating has strong adhesion to the surface of the steel pipe, resistance to chemical media corrosion, and temperature resistance, it is also good in corrosion resistance, cathodic disbondment resistance, aging resistance, and soil stress resistance. Very good, wide temperature range (normal fusion-bonded epoxy powder is -30～100℃, which has become one of the main systems of internal and external anti-corrosion coating technology for pipelines at home and abroad. However, due to the thinner coating (0.3-0.5mm), the resistance Sharp objects have poor impact force and are easily damaged by impact. They are not suitable for stone sections, and are suitable for most soil environments and directional drilling through clay soil.