Abstract: The emergency release device is an important safety component of the LNG hose conveying system. The emergency release device bears the pressure of the internal LNG fluid,the tension of the external hose and other components,as well as the wind load,ice load and other natural loads under the connected conveying state. It is a relatively complicated device in the conveying system to bear the loads. Therefore,it is necessary to analyze the mechanical conditions of the emergency release device in detail to ensure the safety of the LNG transmission process. Combined with the actual working conditions,two of the most dangerous working conditions are analyzed and determined in the ten working conditions in order to provide the research basis for the subsequent finite element analysis.

Key words: emergency release device, LNG hose conveying system, mechanical conditions, actual working condition