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