The closed-cell rate of the polyurethane foam in our products is approximately 92%. With low thermal conductivity and low water absorption rates, coupled with a protective shell made of high-density polyethylene or glass fiber with excellent waterproof properties, it transforms the traditional situation of heating pipelines laid in trenches, which were akin to 'wearing a damp cotton coat'. This significantly reduces the overall thermal loss of the heating pipelines, with a heat network loss of 2%, which is below the international standard requirement of 10%. They offer good corrosion resistance and insulation properties, ensuring a long service life. The buried-insulated pipes, with their polyurethane rigid foam insulation layer tightly bonded to the steel pipe surface, effectively block the penetration of air and water, providing excellent corrosion protection. Air-source thermal insulation pipes

Junru PPR Insulated Pipe, Pre-fabricated Direct Burial DN25: