Disadvantage of Polyurethane Thermal Insulation Pipe in Thermal Pipeline
1. According to the calculation of relevant departments, polyurethane insulating steel pipe can reduce the project cost by 25% (using FRP as maintenance layer) and 10% (using high density polyethylene as maintenance layer) under normal conditions.
2. Low heat loss, waste power polyurethane thermal conductivity: lambda = 0.013-0.03kcal/m.h.oC, much lower than other commonly used pipeline thermal insulation data, thermal insulation effect improved by 4-9 times. And its water absorption is very low, about 0.2 kg/m2. The reason for low water absorption is that the polyurethane foam has a closed porosity of about 92%. Low thermal conductivity and low water absorption, together with insulation layer and waterproof high-density polyethylene or fiberglass reinforced plastics maintenance shell, have changed the traditional trench laying of heating pipeline "wearing wet cotton jacket", greatly increased the overall heat loss of heating pipeline, heat loss of heating network is 2%, far less than the international norms of 10%.
3. Anticorrosion, good insulation function and long service life. The polyurethane rigid foam insulation layer is tightly bonded to the outer skin of the steel pipe, and the air and water infiltration can be isolated. At the same time, its foaming holes are closed and its water absorption is very small. High density polyethylene shell and FRP shell have good anti-corrosion, insulation and mechanical functions. Therefore, the outer skin of the task steel pipe is very comfortable to the corrosion of the outside air and water. According to foreign materials, the service life of the pipeline can reach more than 50 years, which is 3-4 times longer than that of traditional trench laying and overhead laying.
In summary, all the above-mentioned Shandong Hipper Pipe Technology Development Co., Ltd. provides, want to know more about polyurethane insulation pipe manufacturers, welcome to pay attention to our website: https://www.sdhpgy.com Thank you for your support!
