March 2018

Terminals and Storage

Keep a floating roof on an even keel

Users of large liquid hydrocarbon storage tanks at refineries and terminals must solve a variety of problems and make trade-offs related to vapor emissions and general structural integrity for these massive containers.

Skogberg, P., Emerson Automation Solutions

Users of large liquid hydrocarbon storage tanks at refineries and terminals must solve a variety of problems and make trade-offs related to vapor emissions and general structural integrity for these massive containers. Rigid tanks have a fixed roof, which helps support the sides, and it must hold up under rain and possibly snow accumulation. Moreover, vapors within the headspace must be controlled and contained to comply with environmental regulations, and to maintain a safe working environment. Given these structural challenges, it is no surprise that more than half of the larger storage tanks around the world have done away with a rigid roof in favor of a floating roof. This approach has

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