Drums, like tanks are used as storage vessels. There are two main types, storage drums, shown here, and process drums.
Storage drums typically range in size from 5 to 110 gallons, with 55 gallons being the most common. Typical materials include steel, stainless steel, carbon steel, fibers, composites and plastic. They are available in a closed or open head design. The drums shown here are stainless steel open head drums.
Drums are used to store a wide variety of liquids, such as oil, gasoline, and industrial chemicals. Also, special salvage drums, such as the ones pictured below, are available to contain damaged or leaking drums that hold hazardous materials. Standard salvage drums have a yellow body with a yellow or red lid.
Process drums are usually hollow cylindrical steel vessels. They are used as intermediate containers between process units, or for phase separation by settling.
Drums provide flow rate stability, so fluctuations in process streams are not transmitted through a plant. Horizontal drums are usually used for liquid collection, or separation of two immiscible liquids.
Vertical drums, as seen below, are often used for gas-liquid separation. These drums are used on distillation columns, to separate a portion of the distillate and return it to the column.
Skolink Industries, Inc., Chicago, IL.
Bausbacher, Ed, and Roger Hunt. Process Plant Layout and Piping Design. Englewood Cliffs: Prentice Hall, 1993. Print.
Walas, Stanley M. Chemical Process Equipment: Selection and Design. Stoneham: Butterworth, 1988. Print.