Which safety practice is essential to reduce risk during maintenance on high-pressure boilers?

• A. Lockout/Tagout (LOTO), with permits, isolation, and verification of zero energy before work.
• B. Wearing sandals for comfort.
• C. Only lockout the fuel but not water.
• D. Reducing the plant voltage but leaving energy on.

Answer: (A)

The key idea is to completely control and prevent any stored or flowing energy from being released while maintenance is done. Lockout/Tagout uses physical locks to keep energy sources off and tags to warn others not to re-energize the equipment. This ensures the boiler cannot unexpectedly start, release steam, or feed fuel while someone is working, which is critical when dealing with high-pressure systems.

Permits bring in proper authorization and a documented plan, so the maintenance work is planned with all hazards identified and steps to control them laid out. Isolation means disconnecting or shutting off all energy sources that could energize the boiler—electrical power, fuel lines, water/steam pressures, and any other energy forms. Verification of zero energy means actively checking to confirm there is no energy present before entry or work begins, often by testing and attempting to energize cautiously to ensure nothing will move or release unexpectedly.

This approach significantly reduces the risk of burns, scalds, or catastrophic releases, which are the real hazards with high-pressure boilers. The other options miss essential protections: wearing sandals offers no protection against burns or impact; only locking out one energy source leaves others live; and reducing voltage while energy remains on ignores steam pressure, fuel, and other stored energies that can still cause harm.