Buried high temperature hot water pipeline engineering design technology

　　Seamless steel pipe or spiral welded pipe are used in all work. The outer protective pipe is made of a high density polyethylene shell and high density polyethylene capacitor sleeves, with polyurethane foam insulation. The outer protective tube is made ​​of high density polyethylene and high density polyethylene shell capacitor sleeves, polyurethane foam insulation.

　　With traditional compensation methods, the thermal deformation of pipes can not be resolved, so huge external fixed piers are needed. Additionally, the entire pipe network process is extremely complicated. A jacket tube will craze due to temperature changes and its waterproof seal will also fail.

　　The rotary compensation method, lays pipes in a similar way as laying water pipes, using the soil’s natural binding force to form a natural anchor point so that the entire network is always in the state of free expansion, avoiding stress concentration. It is an innovation in heating system and the first choice for buried heating pipeline design.

　　High security: the process is characterized as a rigid pipe, flexible structure , simply furnished structure .

　　Low construction cost; because the entire line is placed without setting a fixed pier, little compensation is used; it is less demanding on the ground foundation; and no maintenance needed; 20% -30% are saved on a one-time investment.

　　Simple design and calculation: no calculation of stress and thermal stress are needed; for different terrain conditions. As long as the compensator is set within the stress limitation, it will work.

　　The construction cycle is short. Quick construction, time savings mean a significant reduction in the amount of building materials and construction costs. Efficacy is at least doubled when a civil fixed pier is unnecessary and not built.

　　No operation and maintenance are needed: this advanced technology is designed so that the entire line is without weak links; no operation and maintenance are needed.

　　Renovation is convenient and safe: with stress free design and construction; no matter what pipe network renovation or branch pipeline additions are made, at any time, the renovation can be in any position without using any technical measures, as long as compensation is added at the branch pipelines.

　　Cases: Hulunbeier heating center and Daqing heating center, etc.

　　·