The closed cell rate of our polyurethane foam is approximately 92%. With its low thermal conductivity and low water absorption rate, combined with a protective shell made of high-density polyethylene or glass fiber with excellent waterproofing properties, it changes the traditional condition of laying heating pipes in "wet cotton clothes" underground. This significantly reduces the overall thermal loss of the heating pipes, with a heat loss in the heat network of only 2%, which is below the international standard requirement of 10%. It boasts good corrosion resistance, insulation properties, and a long service life. The pre-insulated pipe laid directly underground, due to the tightly bonded polyurethane rigid foam insulation layer to the exterior of the steel pipe, effectively prevents air and water intrusion, offering excellent corrosion protection. PPR composite pre-insulated pipe.

Junru Insulation Pipe for Thermal Retention, DN65: