Market Application Scope of Steel Clad Steel Steam Insulation Pipelines is expanding with the vigorous development of urban centralized heating and combined heat and power generation, and the technology of heat pipelines has been widely applied domestically. The buried laying method, with its excellent insulation effect, high energy-saving efficiency, less land occupation, no impact on urban planning, convenient installation, short construction period, long service life, and low maintenance costs, has been universally favored since its introduction. The types of external protective sleeves for buried steam insulation pipes mainly used in China currently are "Plastic Clad Steel" and "Steel Clad Steel." The technical route for the buried steel clad steel steam pipeline is to replace brick or concrete culverts with steel sleeves 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 sleeve. Buried steam pipelines; buried; externally fixed; internally fixed. In recent years, there have been many attempts to use buried steam pipelines in northern cities. When steam pipelines cross main urban roads and involve environmental beautification issues, the buried laying method can effectively solve the above problems. Moreover, due to its fast construction progress, good insulation performance, low construction cost, and material saving characteristics, it has been increasingly widely used. As steam buried pipelines are a new thing, the national construction department has not yet formulated formal standards for detailed provisions on steam buried pipelines.

Several characteristics of steel-clad steel-insulated pipes from manufacturers, such as direct-bury steam pipelines, have gained widespread application as a new material in the heating industry due to their fast construction progress, excellent insulation performance, low construction cost, and material savings. Since 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 direct-bury steam pipelines available on the market.