What role do locks and tags play in NFPA 20 shutdown procedures?

What role do locks and tags play in NFPA 20 shutdown procedures?

• A. They replace the need for a written shutdown plan.
• B. They document the time of shutdown for record-keeping.
• C. They implement lockout/tagout to protect personnel during maintenance and prevent accidental startups.
• D. They serve as decorative labels.

Answer: (C)

Locks and tags are the lockout/tagout devices used to enforce a safe zero-energy condition during NFPA 20 shutdowns. When maintenance or testing is needed, energy sources for the pumping system are isolated, and these devices are applied to the appropriate energy-isolating points. The lock physically prevents the equipment from being re-energized, while the tag warns and identifies who placed the lock, what work is being done, and when re-energization may occur. This combination protects personnel from accidental starts and ensures the work area remains safe until the task is finished and the system has been verified as safe to restart. A written shutdown plan is still required to coordinate the steps, verify zero energy, and outline who is authorized to remove the devices. Locks and tags alone do not replace the plan, nor are they decorative or primarily for documentation. They’re the practical means of enforcing safe shutdown and preventing accidental re-energization during maintenance.

Locks and tags are the lockout/tagout devices used to enforce a safe zero-energy condition during NFPA 20 shutdowns. When maintenance or testing is needed, energy sources for the pumping system are isolated, and these devices are applied to the appropriate energy-isolating points. The lock physically prevents the equipment from being re-energized, while the tag warns and identifies who placed the lock, what work is being done, and when re-energization may occur. This combination protects personnel from accidental starts and ensures the work area remains safe until the task is finished and the system has been verified as safe to restart.

A written shutdown plan is still required to coordinate the steps, verify zero energy, and outline who is authorized to remove the devices. Locks and tags alone do not replace the plan, nor are they decorative or primarily for documentation. They’re the practical means of enforcing safe shutdown and preventing accidental re-energization during maintenance.