In order to achieve reasonable hangers and supports interval with high quality and low cost

this paper comparatively analyzes the calculation methods for pipe hanger interval according to different rules.It focuses on the bending stress of strength condition and bending deflection

natural frequency of stiffness condition.Moreover

these methods were used for interval calculation for several common pipe hangers in an ultra-supercritical 660 MW unit air cooling power plant.It concluded that the domestic pipe hanger interval calculation can be divided into two categories

the domestic power industry mode and the petrochemical industry mode.These two models are basically similar

but manifold industry features and relevant evaluations cause huge calculation difference.It is recommended that when the Pipe Hangers Part 1:Technical Specification GB/T 17116.1is amended

overall industry design characteristics and requirements shall be taken into account

so as to ensure the safety operation of the pipelines.