1, the directly buried polyurethane foam insulation pipe is selected as rigid polyurethane foam as its insulation layer, the rigid polyurethane foam has a closed porosity of about ninety-seven percent, and its water absorption rate is very low. It avoids the immersion of external water, corrosive liquids and microbes, and prevents the development and consumption of microorganisms. One step guarantee.

2、硬质聚氨酯泡沫塑料保温层的保温性能极高，其热损失仅为传统管材的百分之二十五，长期大量的运转运用，能够俭省大量的能源，从而降低了能源的本钱。

2. The thermal insulation performance of rigid polyurethane foam plastic insulation layer is very high, and its heat loss is only 25% of the traditional pipe material. Long-term and large-scale operation can save a lot of energy, thus reducing the cost of energy.

3、由于直埋式聚氨酯泡沫保温钢管具有防水防腐蚀的性能，所以在施工过程中不需求敷设管沟，能够直接埋入公开或水中，缩短了施工周期，降低了施工本钱。

3, since the directly buried polyurethane foam insulation pipe has the function of waterproofing and corrosion protection, there is no need for laying trench in the construction process, which can be directly embedded in open or water, shortening the construction period and reducing the construction cost.

4、依据国外相关材料调查显现，以正确的办法运用预制直埋式保温钢管，能够使其运用寿命到达30年50年左右。

4. According to the investigation of foreign related materials, the use of prefabricated direct-buried insulation steel pipe in the right way can make its service life reach about 30 to 50 years.

5、易于施工、施工周期短、操作简单快捷、一次成型等优势特性。

5. Easy to construct, short construction period, simple and fast operation, one-time forming and other advantages.