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.

直埋保溫管自三十年代聚氨酯合成資料降生以來，不斷作為一種優(yōu)良的絕熱保溫資料而得到疾速開展，其應用范圍也越來越普遍，由于其施工煩瑣、節(jié)能防腐效果顯著。聚氨酯保溫管普遍用于液體、氣體的保送管網，化工管道保溫工程石油、化工、集中供熱熱網、空調通風管道、市政工程等。直埋保溫管是一種保溫性能好，愈加牢靠，工程造價低的直埋預制保溫管。

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.

直埋保溫管不只具有傳統(tǒng)地溝和架空敷設管道難以比較的技術、適用性能，而且還具有顯著的社會效益和經濟效益，也是供熱節(jié)能的有力措施。預制直埋保溫管采用直埋供熱管道技術，標志著我國供熱管道技術開展曾經進入了新的起點。聚氨酯預制直埋保溫管采用的預先訂制，它 愈加有利于保溫管應用的實踐消費生活中，具有很大的靈敏性和順應性，能夠依據不同需求，設計不同參數的直埋保溫管。

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.

聚氨酯螺旋保溫管價錢方面是在保溫管的構造和性能。聚氨酯預制直埋保溫管的構造采用由里到外依次有內維護層、保溫層、外維護層。內維護層是保送介質的鋼管，具有耐腐蝕性和防水性能好等特性。鋼管和外維護層之間的硬質聚氨酯泡沫保溫層采用管中管發(fā)泡技術使三者嚴密分離而成。外維護層是度聚乙烯外套管。總的說來，聚氨酯預制直埋保溫管的保溫隔熱性能比傳統(tǒng)保溫管愈加優(yōu)良，保溫保冷的效果更好。

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.