Steel-clad steel steam insulation pipeline market application scope is expanding with the vigorous development of urban centralized heating and cogeneration. The technology for thermal pipeline has been widely used in China. The direct-burial installation method is favored for its excellent insulation performance, high energy-saving efficiency; minimal land occupation without affecting urban planning; easy installation, short construction period; long service life, and low maintenance costs. Currently, the two types of outer sheath pipes mainly used in China for direct-buried steam insulation pipes are "plastic-clad steel" and "steel-clad steel." The technical route for steel-clad steel burial is to replace brick or concrete trenches with steel套tubes based on traditional trench laying. The sliding interface of the pipeline is the interface between the pipeline support and the inner wall of the steel套tube. Direct-buried steam pipelines; direct burial; external fixation; internal fixation. In recent years, there have been many attempts to use direct-buried steam pipelines in northern cities. When steam pipelines cross urban main roads or involve environmental beautification issues, the direct-burial installation method can effectively address these problems, and due to its fast construction progress, good insulation performance, low construction cost, and material savings, it has been increasingly widely used. As steam direct-burial pipelines are a new phenomenon, the construction department has not yet formulated formal standards for detailed regulations on steam direct-buried pipelines.

Steel sleeve steel保温pipe manufacturers' prices for directly buried steam pipelines have several characteristics. As a new material in the heating industry, directly buried steam pipelines have gained increasingly widespread application due to their fast construction progress, good thermal insulation performance, low construction cost, and material savings. Since there are no design specifications for high-temperature steam pipelines, the insulation structures and fixation methods vary among different manufacturers. This article discusses several common characteristics of directly buried steam pipelines available on the market.