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.

直埋保温管自三十年代聚氨酯合成资料降生以来，不断作为一种优良的绝热保温资料而得到疾速开展，其应用范围也越来越普遍，由于其施工烦琐、防腐效果显著。聚氨酯保温管普遍用于液体、气体的保送管网，化工管道保温工程石油、化工、集中供热热网、空调通风管道、市政工程等。直埋保温管是一种保温性能好，愈加牢靠，工程造价低的直埋预制保温管。

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.

直埋保温管不只具有传统地沟和架空敷设管道难以比较的技术、适用性能，而且还具有显著的社会效益和经济效益，也是供热的有力措施。预制直埋保温管采用直埋供热管道技术，标志着我国供热管道技术开展曾经进入了新的起点。聚氨酯预制直埋保温管采用的预先订制，它 愈加有利于保温管应用的实践消费生活中，具有很大的灵敏性和顺应性，能够依据不同需求，设计不同参数的直埋保温管。

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.

聚氨酯螺旋保温管价钱方面是在保温管的构造和性能。聚氨酯预制直埋保温管的构造采用由里到外依次有内维护层、保温层、外维护层。内维护层是保送介质的钢管，具有耐腐蚀性和防水性能好等特性。钢管和外维护层之间的硬质聚氨酯泡沫保温层采用管中管发泡技术使三者严密分离而成。外维护层是度聚乙烯外套管。总的说来，聚氨酯预制直埋保温管的保温隔热性能比传统保温管愈加优良，保温保冷的效果更好。

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.