Corrosion protection layer: Protects the outer steel pipe from corrosive substances, extending the service life of the steel pipe.

2. External Steel Pipe: Protects the insulation layer from groundwater erosion, supports the working pipe, and can bear certain external loads, ensuring the normal operation of the working pipe.

3. Insulation and thermal barrier with glass wool, air insulating layer: Ensures the medium temperature and maintains the surface temperature of the outer protective pipe at a constant level.

4. Aluminum foil reflective layer: Ensures that organic foam material does not enter the inorganic hard, high-temperature-resistant layer; reflects part of the high-temperature layer's heat.

5. Inorganic rigid insulating layer: withstanding high temperatures, ensures the interface temperature between the inorganic and organic insulating layers, guarantees the foam is not carbonized.

6. Stainless Steel Fastening Strips, Sliding Guide Brackets: Ensure the free movement of thermal expansion and contraction for the working steel pipe.

7. Working钢管: Ensure normal flow of transmission medium