Abstract: In this paper, the principle which considers the static cases first and then the dynamic ones was used to find the essential reasons of nozzle loads’ overstepping the limiting values integrating the piping structural characteristics on the condition that the nozzle loads’ overstepping the limiting values and the case temperature should be heightened. The realizable restricting measures were gotten by adjusting supports and hangers and analysis when the case temperature was heightened properly. The nozzle loads’ demands are satisfied, the equipments are protected and the piping security capability are improved.