Steel-clad steel steam-insulated pipelines have a wide range of market applications, expanding with the vigorous development of urban centralized heating and combined heat and power generation. The technology for heat pipelines has been widely applied domestically. The direct-burial laying method is favored for its excellent insulation performance, high energy-saving efficiency; minimal land use without affecting urban planning; easy installation, short construction period; long service life, and low maintenance costs. The types of external protective sleeves for direct-buried steam-insulated pipes commonly used in China currently include "plastic-clad steel" and "steel-clad steel." The technical route for steel-clad steel burial is based on traditional trench laying, replacing brick or concrete trenches with steel sleeves. The sliding interface of the pipeline is between the pipeline support and the inner wall of the steel sleeve. 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 and involve issues related to environmental beautification, the direct-burial laying method can effectively address these problems. It has gained wider application due to its fast construction progress, good insulation performance, low construction cost, and material savings. As a new thing, the construction department of the state has not yet formulated formal standards for detailed provisions on direct-buried steam pipelines.

Steel clad steel thermal insulation pipe manufacturers' prices feature several characteristics. As a new material in the heating industry, buried steam pipelines are gaining wider application 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 fixing methods vary among different manufacturers. This article discusses several common characteristics of buried steam pipelines available in the market.