Projects performed in the process chemical industry implies construction, reconstruction and rehabilitation part of the plants or the entire production facilities. Inwardly may contain a number of smaller projects within a civil, mechanical, technological and instrumental profession. Demolition works can be considered as a part of civil works and identification of risk events is one of the first steps of risk management. This study is focused on developing a deeper understanding of risk assessment and management two-dimensionally; from the point of view of HSE risks and project performance risks. Research is targeted on risks attendant to project performance of demolition and examination if those risk are indicated in the early phases of project life, in the later phases of project life or not indicated at all. In that manner it would be recognized how companies treat project complexity and uncertainty related with it. Along with risk analysis associated activity is cost estimation and risks related to it. It is interesting to analyze how appropriate demolition technique tributary costs and are demolition risks covered with turnkey type of contracts or not

Keywords: risks, management, demolition, chemical industry, complexity