Small projections attached to, or built into, heavy components. The lugs have an opening in the center to which cables can be attached for lifting.
Lifting lugs are in the construction of storage tanks and multi-grade dispensers. Some tank manufacturers insert threaded lifting lugs in pipe openings.
Industry codes of practice caution against attempts to lift or move storage tanks by wrapping chains or cables around the tank shell. Instead, the proper procedure is to thread cables or hooks into the lifting lugs, and to use a crane or similar power source to provide the upward thrust.