Hengli Petrochemical Chemical Ethylene Project, 1.5 million tons/year ethylene, steam cracking technology When utilizing the data set for the industrial process of ethylene production via the naphtha route, users are advised to pay attention to the upstream sourcing of raw materials, such as naphtha, mixed C4, and ethane, which are derived from a refining and chemical project with a global average as a background. Additionally, consider the availability and impact of high-pressure and low-pressure steam, fresh water from the water purification plant, and electricity from the Chinese national grid. The pollutant emissions are to be accounted for according to the petrochemical industry standards. The functional unit for this data set is defined as 1 ton of industrial grade ethylene product, and quality assignment is used in the study. It is crucial to ensure that all factors are properly assessed when applying the data for life cycle analysis to accurately reflect the environmental impact of the process.