1. It has strong corrosion resistance and waterproof ability and low comprehensive cost

據有關部門測算，雙管制供熱管道，一般情況下可以降低工程造價的25%（采用玻璃鋼做保護層）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護層）左右。

About 10% (HDPE is used as protective layer).

2 、防腐，絕緣性能好，使用壽命長

2. Anticorrosion, good insulation and long service life

保溫管由于聚氨酯硬質泡沫保溫層緊密地粘結在鋼管外皮，隔絕了空氣和水的滲入，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。同時它的發泡孔都是閉合的，吸水性很小。高密度聚乙烯外殼、玻璃鋼外殼均具有良好的防

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、絕緣和機械性能。因此，工作鋼管外皮很難受到外界空氣和水的侵蝕。只要管道內部水質處理好

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

，據國外資料介紹，高溫預制直埋保溫管的使用壽命可達50年以上，比傳統的地溝敷設、架空敷設使

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

用壽命高3~4倍。

The service life is 3 ~ 4 times longer.

3、熱損耗低，節約能源。 熱損耗僅為傳統管材的25%

3. Low heat loss and energy saving. The heat loss is only 25% of the traditional pipe material

直埋保溫管 導熱系數 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 有利于環境保護

4. Less land occupation and faster construction is conducive to environmental protection

直埋供熱管道不需要砌筑龐大的地溝，只需將保溫管埋人地下，因此大大減少了工程占地，減少土方

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

開挖量約50%以上，減少土建砌筑和混凝土量90%。同時，保溫管加工和現場挖溝平行進行，只需現場

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

接頭，可以縮短工期約50%以上。

The joint can shorten the construction period by more than 50%.