湖北新闻网聚氨酯保温钢管

聚氨酯保温钢管优势特点：
1、降低工程造价
据有关部门测算，一般情况下聚氨酯保温钢管可以降低工程造价的25%（采用玻璃钢做保护层）和10%（采用高密度聚乙烯做保护层）左右。
2 、热损耗低，节约能源
聚氨酯导热系数为：λ=0．013—0．03kcal/m·h·oC，比其他过去常用的管道保温材料低得多，保温效果提高4~9倍。再有其吸水率很低，约为0．2kg/m2。吸水率低的原因是由于聚氨酯泡沫的闭孔率高达92%左右。低导热系数和低吸水率，加上保温层和外面防水性能好的高密度聚乙烯或玻璃钢保护壳，改变了传统地沟敷设供热管道“穿湿棉袄”的状况，大大减少了供热管道的整体热损耗，热网热损失为2%，远远小于国际10%的标准要求。
3、防腐蚀、绝缘性能好，使用寿命长
由于聚氨酯硬质泡沫保温层紧密地粘结在钢管外皮，隔绝了空气和水的渗入，能起到良好的防腐作用。同时它的发泡孔都是闭合的，吸水性很小。高密度聚乙烯外壳、玻璃钢外壳均具有良好的防腐、绝缘和机械性能。因此，工作钢管外皮很难受到外界空气和水的侵蚀。只要管道内部水质处理好，据国外资料介绍，使用寿命可达50年以上，比传统的地沟敷设、架空敷设使用寿命高3~4倍。

Advantages and characteristics of polyurethane insulated steel pipe: 1, reduce the project cost According to the estimation of relevant departments, generally speaking, polyurethane insulated steel pipes can reduce the construction cost by about 25 % ( using glass fiber reinforced plastic as protective layer ) and 10 % ( using high density polyethylene as protective layer ). 2. low heat loss and energy conservation The thermal conductivity of polyurethane is: λ = 0.013 - 0.03 kcal / m h oc, which is much lower than other commonly used pipe insulation materials in the past, and the insulation effect is increased by 4 - 9 times. Moreover, its water absorption rate is very low, about 0.2 kg / m2. The reason of low water absorption is that the closed-cell rate of polyurethane foam is as high as 92 %. The low thermal conductivity and low water absorption, together with the insulation layer and the high density polyethylene or glass fiber reinforced plastic protective shell with good waterproof performance outside, have changed the traditional trench laying of the heating pipe " wearing wet cotton-padded jacket" and greatly reduced the overall heat loss of the heating pipe. the heat loss of the heating network is 2 %, which is far less than the international standard requirement of 10 %. 3. anti - corrosion, good insulation and long service life Since the polyurethane rigid foam insulation layer is tightly bonded to the steel pipe skin, it can isolate the infiltration of air and water and play a good anti-corrosion role. At the same time, its foaming pores are all closed and its water absorption is very small. Both the high density polyethylene shell and the glass fiber reinforced plastic shell have good anti - corrosion, insulation and mechanical properties. Therefore, it is very difficult for the working steel tube skin to be eroded by outside air and water. As long as the internal water quality of the pipeline is well treated, according to foreign data, the service life can reach more than 50 years, which is 3 to 4 times longer than the service life of the traditional trench laying and overhead laying.

4、在低温条件下也具有良好的耐腐蚀和耐冲击性，可直接埋入地下冻土。
5、使用寿命可达30-50年，正确的安装和使用可使管网维修费用极低。
6、可设置报警系统，自动检测管网渗漏故障，准确指示故障位置并自动报警。