Insulated pipes are widely used in the transportation networks for liquids and gases, as well as in insulation projects for chemical pipelines, oil and chemical industries, centralized heating networks, central air-conditioning ventilation ducts, municipal engineering, and other sectors. High-temperature prefabricated directly buried insulation pipes feature excellent insulation performance, safety and reliability, and low engineering costs. They effectively address the issues of insulation, sliding lubrication, and waterproofing of exposed pipe ends for prefabricated directly buried insulation pipes used in urban centralized heating systems with temperatures ranging from 130°C to 600°C.
These high-temperature prefabricated directly buried insulation pipes not only possess advanced technologies and practical functions that are unmatched by traditional trench and overhead pipelines but also bring significant social and economic benefits, serving as a potent measure for energy-saving in heating. The adoption of direct burial heating pipeline technology for high-temperature prefabricated insulation pipes marks a new starting point in the development of China's heating pipeline technology.
Insulation pipes consist of steel tubes, glass fiber reinforced plastic (GFRP) inner jackets, and GFRP outer shells. Their distinguishing features include a high-temperature-resistant thermal insulation layer, a lubrication layer, and elastic seals. This innovation effectively resolves the insulation, sliding lubrication, and waterproofing problems at exposed pipe ends for prefabricated directly buried insulation pipes used in urban centralized heating systems with temperatures ranging from 130°C to 600°C.
