发泡保温管由高性能聚醚多元醇组合物和多种甲基聚苯多异氰酸酯为原料化学反应发泡而成。发泡保温管具有容重轻、强度高、隔热、隔音、阻燃、耐寒、耐腐蚀、不吸水、施工简单快捷等优良特性。已成为石油、化工、电力、建筑、交通、制冷等工业部门隔热、防水、堵漏、密封等不可缺少的产品。
发泡保温管能有效降低工程成本:据有关部门估计,发泡保温管一般可降低工程成本约25%(采用玻璃钢作为保护层)和10%(采用高密度聚乙烯作为保护层)。发泡保温管适用于输送-50-150℃范围内的各种介质的保温和保冷工程。发泡保温管广泛应用于城市集中供热、暖房、冷库、煤矿、石油港口、化工等行业的保温保冷工程。
发泡保温管热损失低,节能。导热系数λ=0.013-0.03 kcal/m·h·oc,远低于过去常用的其他管道保温材料,保温效果提高4-9倍。而且,它的吸水率很低,约为0.2公斤/平方米。吸水率低的原因是聚氨酯泡沫的闭孔率高达92%。导热系数低、吸水率低,再加上保温层和外部防水性能好的高密度聚乙烯或玻璃钢保护壳,改变了供热管道传统的敷设,大大降低了供热管道的整体热损失。热网的热损失为2%,低于10%的国际标准要求。
发泡保温管耐腐蚀,保温性能好,使用寿命长。由于发泡保温管的聚氨酯硬质泡沫保温层与钢管外皮紧密结合,隔绝了空气和水的渗透,具有良好的防腐效果。同时,它的发泡孔是封闭的,吸水性非常小。高密度聚乙烯外壳和玻璃钢外壳均具有良好的防腐、绝缘和机械性能。因此,工作钢管的外皮很难被外界空气和水侵蚀。只要对管道内部水质进行适当处理,管道的使用寿命可达50年以上,比传统的管沟敷设和架空敷设的使用寿命长3-4倍。
发泡保温管占地少,施工速度快,有利于环境保护。发泡保温管不需要修建巨大的沟渠,只需要将保温管埋在地下,这样就大大减少了工程占地面积,土方开挖量减少了50%以上,土建和混凝土用量减少了90%。同时发泡保温管加工和现场挖沟并行进行,只需现场接头,工期可缩短50%以上。
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