The spring support and hanger is a mechanical device designed according to the principle of moment balance. It can be used to suspend and support pipes and equipment, at this time, when the pipe or equipment produces displacement, as long as the load is pre selected. The spring support and hanger is a mechanical device designed according to the principle of moment balance. Can be suspended and supporting the pipeline and equipment, through it at this time, when the pipeline or equipment displacement, as long as the load displacement pre selected, regardless of the displacement change much, they can always get through the spring bracket support force constant. As a result, new additional pressure will not be brought to the pipe or equipment, thereby avoiding significant equipment and safety incidents. In general there are important parts of large thermal displacement, it should consider setting up a spring hanger, but because of the characteristics of force spring hanger, so in the ordinary thermal power plant, nuclear power plant, petroleum and chemical thermal power equipment is more and more applied.