Polyurethane direct-buried insulation pipe has many excellent characteristics, such as thermal insulation, waterproof, anticorrosion, insulation, sound insulation, flame retardant, cold resistance, anticorrosion, light capacity, high strength, complicated and fast construction, not afraid of plant thorns and so on. It has become an indispensable material for thermal insulation, waterproof, leak plugging and sealing of industrial departments such as construction, transportation, petroleum, chemical industry, electric power, refrigeration, etc. Directly buried insulation pipes are used in various indoor and outdoor pipelines, central heating pipelines, air conditioning pipelines, chemical industry, medicine and other industrial pipelines for heat preservation, cooling engineering, oil pipeline engineering, steam transportation and other pipeline engineering.

Since the birth of polyurethane synthetic data in the 1930s, direct-buried thermal insulation pipe has been developed rapidly as an excellent thermal insulation material, and its application scope is becoming more and more widespread, because of its cumbersome construction, energy-saving and anticorrosive effect is remarkable. Polyurethane insulation pipes are widely used in liquid and gas pipeline network, chemical pipeline insulation engineering petroleum, chemical industry, central heating network, air conditioning and ventilation pipeline, municipal engineering, etc. Direct-buried insulating pipe is a kind of prefabricated insulating pipe with good thermal insulation performance, more reliable and low cost.

Direct buried insulation pipe not only has the technical and applicability performance that is difficult to compare with traditional trench and overhead pipeline laying, but also has significant social and economic benefits. It is also a powerful measure of heating energy saving. Prefabricated directly buried insulating pipes adopt the technology of directly buried heating pipes, which indicates that the technology of heating pipes in China has entered a new starting point. Prefabrication of polyurethane prefabricated directly buried insulating pipes is more conducive to the practical consumption of insulating pipes. It has great sensitivity and compliance, and can design directly buried insulating pipes with different parameters according to different needs.

The price of polyurethane spiral insulating pipe is the structure and performance of insulating pipe. The structure of polyurethane prefabricated directly buried insulating pipe is composed of internal maintenance layer, thermal insulation layer and external maintenance layer from inside to outside. The inner maintenance layer is a steel pipe with delivery medium, which has good corrosion resistance and waterproof performance. The rigid polyurethane foam insulation layer between the steel tube and the outer maintenance layer is made by the tube tube foaming technology, which makes the three parts closely separated. The outer maintenance layer is the degree polyethylene outer sleeve. Generally speaking, the thermal insulation performance of polyurethane prefabricated directly buried insulating pipes is better than that of traditional insulating pipes, and the effect of thermal insulation and cooling is better.