Hengli Spring Hanger (hereinafter referred to as Hengdiao) is designed based on the principle of moment balance. Under the permitted load displacement, the load moment and spring moment always maintain balance. For pipelines and equipment supported by Hengdiao, a constant supporting force is provided during displacement, thus avoiding additional stress on the pipeline and equipment. Hengdiao is generally used in places where displacement stress needs to be reduced, such as the main body of power station boilers, steam, water, flue, and air ducts in power plants, as well as the suspended parts of burners, and in oil and chemical industries where such support is required. When the thermal displacement of a lifting point in the pipeline system exceeds 12mm, it is advisable to use Hengdiao for support to avoid dangerous bending stress and unfavorable stress transfer in the pipeline system.