Steel-clad steel steam insulation pipelines have a wide range of market applications, growing with the vigorous development of urban centralized heating and combined heat and power generation, and the thermal pipeline technology has been widely used domestically. The buried straight laying 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. Since its introduction, it has gained widespread popularity. The types of outer protective casings for buried steam insulation pipes mainly used in China are "plastic-clad steel" and "steel-clad steel." The technical route for steel-clad steel burial involves replacing brick or concrete trenches with steel clad pipes on the basis of traditional trench laying. The sliding interface of the pipeline is the interface between the pipeline support and the inner wall of the steel clad pipe. Buried steam pipelines; buried laying; external fixation; internal fixation. In recent years, there have been many attempts to use buried steam pipelines in northern cities. When steam pipelines cross urban main roads or involve environmental beautification issues, the buried laying method can effectively address these problems. Moreover, its rapid construction progress, excellent insulation performance, low construction cost, and material savings have led to its increasingly widespread application. As steam buried pipelines are a relatively new phenomenon, the national construction department has not yet formulated formal standards for detailed regulations on steam buried pipelines.

Several characteristics of steel-clad steel-insulated steam pipeline manufacturers' prices for directly buried steam pipelines make them increasingly popular as a new material in the heating industry. They are favored for their fast construction progress, excellent insulation performance, low construction cost, and material savings. As there is no design specification 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.