1、具有很强的耐腐蚀和防水能力，综合造价低
1. It has strong corrosion resistance and waterproof ability and low comprehensive cost
据有关部门测算，双管制供热管道，一般情况下可以降低工程造价的25%（采用玻璃钢做保护层）和
According to the calculation of relevant departments, under normal circumstances, the double pipe heating pipeline can reduce 25% of the project cost (using glass fiber reinforced plastic as the protective layer) and
10%（采用高密度聚乙烯做保护层）左右。
About 10% (HDPE is used as protective layer).
2 、防腐，绝缘性能好，使用寿命长
2. Anticorrosion, good insulation and long service life
保温管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
The insulation pipe is tightly adhered to the outer skin of the steel pipe because of the rigid polyurethane foam insulation layer, which can prevent the infiltration of air and water.
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
Putrefaction. At the same time, its foam cells are closed, water absorption is very small. High density polyethylene (HDPE) and glass fiber reinforced plastic (FRP) shells have good protection
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
Corrosion, insulation and mechanical properties. Therefore, the outer skin of the working steel pipe is hard to be eroded by the outside air and water. As long as the water quality inside the pipeline is well treated
，据国外资料介绍，高温预制直埋保温管的使用寿命可达50年以上，比传统的地沟敷设、架空敷设使
According to foreign data, the service life of high-temperature prefabricated directly buried insulation pipe can reach more than 50 years, which is better than that of traditional trench laying and overhead laying
用寿命高3~4倍。
The service life is 3 ~ 4 times longer.
3、热损耗低，节约能源。 热损耗仅为传统管材的25%
3. Low heat loss and energy saving. The heat loss is only 25% of the traditional pipe material
直埋保温管 导热系数 0.022kcal/m.h.℃ 憎水率 0.03kg/cm³
The thermal conductivity of directly buried insulation pipe is 0.022kcal/m.h. ℃ and the hydrophobicity is 0.03kg/cm & sup3;
4 、占地少 施工快 有利于环境保护
4. Less land occupation and faster construction is conducive to environmental protection
直埋供热管道不需要砌筑庞大的地沟，只需将保温管埋人地下，因此大大减少了工程占地，减少土方
Directly buried heating pipeline does not need to build a huge trench, only need to bury the insulation pipe underground, so it greatly reduces the land occupation and earthwork
开挖量约50%以上，减少土建砌筑和混凝土量90%。同时，保温管加工和现场挖沟平行进行，只需现场
The excavation volume is more than 50%, and the amount of civil masonry and concrete is reduced by 90%. At the same time, the insulation pipe processing and field trenching are carried out in parallel
接头，可以缩短工期约50%以上。
The joint can shorten the construction period by more than 50%.
