Compared to the seamless steel pipe, the heat pipe network heating pipe high-density polyethylene polyurethane insulation pipe is an inorganic material, is a Class A fire protection material, which has a good fire resistance, refractoriness above 1000 °C, fully meet the external wall insulation board Fire resistance requirements. Thermal pipe network heating pipe Polyethylene polyurethane insulation pipe closed porosity rate> 95%, high closed-cell rate so that the heat transfer caused by the air flow is low, is a prerequisite for high thermal insulation.
Therefore, the thermal conductivity of the external wall insulation board produced is 0.068W/m.k, which is lower than the thermal conductivity of the polystyrene board. However, the use effect in the actual project is basically the same, and it can meet the building insulation and heat insulation needs. Thermal pipe network heating pipe High-density polyethylene polyurethane insulation pipe compressive and flexural strength are higher, to achieve a relatively uniform low density and higher strength, use and transport are not easy to fragmentation, and fire integrity. Lightweight is another advantage of our products. Density 120–320kg/m3, can meet the requirements of external wall insulation board, low cost. The material has good compatibility and strong adhesion to the wall.
Thermal pipe network Polyurethane insulation ssaw steel pipe has become a mature technology in some developed countries. In recent years, China’s heating engineering and technical personnel have been promoting the development of China’s domestic pipe network laying technology to a higher level by digesting and absorbing this advanced technology. The practical results over the past few years have fully proved that the laying method of directly buried jacket insulation pipe (precast polyurethane insulation directly buried pipe) has many advantages compared with the traditional trench and overhead laying. This is also the internal impetus for the rapid development of direct heating of jacketed insulation pipes in China’s heating projects.
According to monitoring by the Iron and Steel Association, at the end of May, China’s iron ore price index (CIOPI) was 236.59 points, a decrease of 2.63 points or a decrease of 1.10% from the previous month, which was a decrease from the previous quarter. Among them, the price index of domestic iron ore was 227.59 points, up by 1.28 points month-on-month, with an increase of 0.57%; the price index of imported iron ore was 237.95 points, a decrease of 3.22 points, or a decrease of 1.34%.
From the perspective of the full month, the overall level of China’s iron ore price index (CIOPI) is still higher than that of the previous month. The average value of the CIOPI Composite Index in May was 240.67 points, up 2.34 points from the previous month, an increase of 0.98%. Among them, the average domestic iron ore price index was 227.79 points, up 1.38 points over the previous month, an increase of 0.61%; the average price index of imported iron ore was 242.61 points, an increase of 2.48 points or a growth of 1.03%.