Abstract: This paper briefly introduces the investigation situation of flash explosion accident in the ethylene plant of Lanzhou Petrochemical Company, and comprehensively analyzes the main points and judgment basis of electrostatic accident identification through on-site investigation, investigation visit, collection monitoring, technical analysis and other methods, so as to provide reference for the investigation and determination of electrostatic flash accident in similar places.

Key words: petrochemical; electrostatic; detonation; investigation and analysis