Thermal insulation, anti-corrosion, and wear-resistant liner oil pipe

The thermal insulation, anti-corrosion, and wear-resistant liner oil pipe is a five-layer composite pipe, with the layers arranged from outer to inner as follows: the outermost layer is modified PE or modified PP, the second outer layer is a polymer foam thermal insulation layer, the first inner layer is a thermal radiation reflection layer, the second inner layer is an aerogel thermal insulation layer, and the innermost layer is an anti-corrosion and wear-resistant layer. The polymer foam layer is produced using a unique multi-component foaming technology, employing a chemical foaming process that is safe, reliable, and stable. The foaming expansion ratio reaches 4-5 times, with a Shore hardness of ≥50HD, and the closed-cell rate of the foam layer exceeds 98%. The overall thermal conductivity coefficient is ≤0.05 W/m·K, providing ultra-low thermal conductivity.