Buried steel sleeve steel fixed joints, buried steel sleeve steel fixed joints, the same steel sleeve steel structure, the same pipeline engineering application components, and the same underground pipeline facilities, except that the former is a steel pipe used as a transport tool, while the latter is used as Connected devices exist. All this shows that the steel sleeve steel structure does have a very good practicality and cost-effectiveness, especially in humid environments. Whether it is its own waterproof and moisture-proof ability, or the effect of wicking, it is very good, which can effectively guarantee the transportation task. Work properly. In terms of high temperature resistance, the steel sleeve steel steam insulation steel pipe itself is a steel pipe for high temperature medium transportation, and its ability to withstand high temperatures can be said to be quite strong. And this kind of steel sleeve steel structure can also properly add various anticorrosive and thermal insulation materials without affecting the performance of itself, and further improve the performance of the steel pipe. As long as the bearing capacity of the material is paid attention, a good effect can be achieved.