Towers are not a standalone operation; they are usually located within a process unit adjacent to related equipment and in a suitable position for operator and maintenance access.
Tower operates close to such related items such as pumps, reboilers, drums and condensers and should be positioned to facilitate an orderly and economic interconnection between itself and that equipment.
Within the conventional inline process unit, towers and their related items are located on either side of a central pipe rack, serviced by auxiliary roads for maintenance access.
In plants in which the related equipment is housed, the tower is often located adjacent to the building or structure containing the equipment. The following figure shows a process flow diagram of a tower and its related equipment, a typical plan arrangement of the same equipment and the equipment in elevation.