What hazards can result from an incorrectly installed dummy leg?

• A. Pipe failure, corrosion, and loss of primary containment (LOPC)
• B. Leaks due to poor sealing
• C. Fire hazard
• D. Electrical shock

Answer: (A)

Improper installation of a dummy leg can create mechanical and sealing issues that threaten the piping system’s integrity. If the leg is not aligned, adequately supported, or correctly sealed, joints experience abnormal stresses, potential bending, vibration, or torque. This increases the chance of pipe failure or cracking over time. At the same time, a poor seal or improper gasket torque can allow leaks to develop. Leaks at connections promote exposure of the metal to fluids that can accelerate corrosion, weakening the equipment further. All of these factors together raise the risk of loss of primary containment, which is the most serious safety consequence in a process plant. While a fire could occur if flammable contents are released and ignited, or an electrical hazard could arise in some setups, the direct and most comprehensive hazard from a poorly installed dummy leg is pipe failure, corrosion, and loss of primary containment.