Advantages of 3PE anti-corrosion steel pipe: 

It has high tightness, long-term operation, cost saving and environment friendly; strong corrosion resistance, and if the construction strictly follows the process, and the service life can be 30- 50 years; it also has good corrosion resistance and impact resistance in the low temperature conditions, low water absorption rate of PE (less than 0.01%); it also has high epoxy strength, low water absorption of PE and good hot melt adhesive flexibility, etc. 

1. Anti-corrosion layer: protect the outer steel pipe from corrosive materials and prolong the service life of the steel pipe.

2. External protective steel pipe: protects the insulation layer from groundwater erosion, supports the working pipe and can withstand a certain external load, to ensure that the working pipe works normally.

3. Polyurethane foam layer: to ensure the temperature of the medium and the surface of the outer protective tube to maintain normal temperature.

4. Barrier and reflection layer: ensure that the organic foam material does not enter the inorganic hard high temperature resistant layer; part of the heat of the reflective high temperature resistant layer.

5. Inorganic hard insulation layer: high temperature resistance, to ensure the interface temperature with the organic insulation layer, to ensure that the foam is not carbonized.

6. Drag reduction layer: to ensure the free movement of the thermal expansion and contraction of the working steel tube.

7. Working steel pipe: ensure that the conveying medium flows normally.