Abstract: This article gives a brief introduction of the typical storage and transportation process and control scheme of ethylene spherical tank farm, mainly discusses and summarizes the key points and difficulties in the storage and transportation process design such as the overpressure conditions of liquid ethylene piping system and the type selection and design schemes of safety relief valves, the determination of recovery capacity of boiled-off gas and the comparison of recovery plans, the treatment measures for low temperature ethylene flare gas discharge, the principles for pump configuration, the exhaust scheme and exhaust piping design of liquid phase conveying system and the precooling scheme for the first start-up of ethylene spherical tank farm, summarizes the common problems in design, emphasizes the notable issues and provides some solutions and reasonable suggestions.

Key words: ethylene spherical tank farm, storage and transportation, process design