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High temperature resistant buried insulation pipe 
High temperature prefabricated buried insulation pipes are widely used in liquid and gas transportation pipelines, chemical pipeline insulation engineering, petroleum, chemical, centralized heating networks, central air conditioning ventilation pipelines, municipal engineering, etc. High temperature prefabricated direct buried insulation pipe is a type of direct buried prefabricated insulation pipe with good insulation performance, safety and reliability, and low engineering cost. Effectively solved the insulation, sliding lubrication, and waterproofing problems of prefabricated buried insulation pipes for high temperature heat transfer from 130 ℃ to 600 ℃ in urban centralized heating. High temperature prefabricated buried insulation pipes not only have advanced technology and practical performance that traditional trench and overhead pipelines cannot match, but also have significant social and economic benefits, and are powerful measures for heating energy conservation. The adoption of direct buried heating pipeline technology for high-temperature prefabricated insulation pipes marks a new starting point in the development of China's heating pipeline technology.