1. There is an air layer of about 20-25mm between the insulation layer of the working pipe and the outer steel pipe, which can not only play a good role in insulation, but also provide an extremely smooth drainage for the steel sheathed steel insulation pipe. The moisture channel makes the moisture exhaust pipe really play the role of timely moisture drainage, and at the same time it also functions as a signal tube; if it is pumped into a low vacuum state, it can more effectively achieve heat preservation and reduce the corrosion rate of the inner wall of the outer steel pipe .
2. The roller bearing of the working steel pipe is made of special low thermal conductivity material, and its friction coefficient with the steel is about 0.1, so the friction resistance of the steam pipe is small when it is working.
3. The connection between the fixed support of the working steel pipe, the roller bearing and the working steel pipe is specially designed, which effectively prevents the generation of thermal bridges in the inner and outer steel pipes.
4. The elbows, tees, reducers, bellows compensators, valves, etc. of the working steel pipe should be evenly arranged inside the steel-sleeved steel insulation pipe. The entire working pipe line runs in a fully concealed environment to achieve Safe and reliable purpose.
5. The form of internal fixation is adopted, which can completely eliminate the concrete buttresses that play the role of external fixation, saving a certain amount of cost and shortening the corresponding construction period.
6. Vacuum technology can also be used, which basically eliminates the electrochemical corrosion of the inner wall of the outer steel pipe caused by water vapor, and can further effectively improve the heat preservation performance of the entire pipeline project.