目前设计的多层或高层住宅，大多采用共用立管系统，设计中一般要根据系统水

Most of the multi-storey or high-rise residential buildings currently designed adopt a shared riser system. In the design, the heating system and the shared riser shall be modified vertically according to factors such as system hydraulic balance, heat dissipation equipment, pressure-bearing capacity, and characteristics of chemical pipes. The problem of pipeline thermal compensation should be considered. However. Some designs consider the indoor installation to be buried and ignore the thermal expansion problem of the common riser pipe in the tube well, so no expander is installed; although some are designed with a compensator, the thermal expansion is not carefully checked to determine the location of the compensator Some designs have fixed brackets installed on the upper and lower positions of the compensator, so that the compensator cannot solve the problem of pipe deformation and expansion due to thermal expansion. As a result, the branch pipe is cracked due to thermal expansion and expansion of the riser.

At present, most of the multi-storey or high-rise residential buildings designed use the common riser system. In the design, the heating system and the common riser should be changed vertically according to the factors such as the hydraulic balance of the system, heat dissipation equipment, pressure bearing capacity and the characteristics of chemical pipes, and the problem of pipeline thermal compensation should be considered. However. In some designs, it is considered that the indoor laying is buried, and the thermal expansion of the common riser in the pipe well is ignored, so the expander is not set; Although some compensators are designed, the thermal expansion is not carefully checked to determine the position of the compensator; In other designs, fixed supports are installed at the upper and lower positions of the compensator, so that the compensator can not solve the problem of deformation and expansion of the pipeline due to thermal expansion, resulting in the cracking of the branch pipe due to the thermal expansion and expansion of the riser.<br>

At present, most of the multi-storey or high-rise residential buildings designed adopt the shared riser system. In the design, the heating system and shared riser system should be relocated vertically according to the hydraulic balance of the system, heat dissipation equipment, pressure bearing capacity, characteristics of chemical pipes and other factors, and the heat compensation of pipes should be considered. However. Some designs think that the indoor installation is buried, but ignore the thermal expansion problem of the common riser in the tube well, so there is no expansion device; Although some compensators are designed, the thermal expansion is not carefully checked to determine the position of the compensators. Another design is to install fixed brackets at the upper and lower positions of the compensator, so that the compensator can not solve the problem of deformation and expansion of the pipeline due to thermal expansion, and as a result, the branch pipe is cracked due to thermal expansion and expansion of the riser.