Episode 15 - Lockout-Tagout - Forms of Hazardous Energy

Episode 15 focuses on one of the most critical foundations of the Lockout/Tagout (LOTO) standard: understanding all forms of hazardous energy. Bryan Haywood emphasizes that many LOTO incidents occur not because workers skip steps, but because they fail to recognize every energy source that must be controlled.

The core message: You can’t control what you don’t identify — and hazardous energy comes in more forms than most people realize.

  ⚡ The Six Major Forms of Hazardous Energy

Bryan walks through the primary energy types that must be identified and controlled during servicing and maintenance:

  🔌 1. Electrical Energy

Includes energized circuits, stored electrical charge, capacitors, batteries, and static buildup.

Key risks: shock, arc flash, unexpected startup.

  🔄 2. Mechanical Energy

Stored energy in moving parts, springs, flywheels, belts, chains, and elevated machine components.

Key risks: crushing, entanglement, sudden movement.

  🔥 3. Thermal Energy

Heat or cold stored in equipment, steam lines, ovens, furnaces, or cryogenic systems.

Key risks: burns, fires, pressure buildup.

  💨 4. Pneumatic Energy

Compressed air in lines, cylinders, tanks, or actuators.

Key risks: sudden movement, hose whipping, high‑pressure release.

  💧 5. Hydraulic Energy

Pressurized liquids in pumps, lines, cylinders, or accumulators.

Key risks: crushing, injection injuries, uncontrolled motion.

  🛢️ 6. Chemical Energy

Energy stored in reactive chemicals, flammable vapors, corrosives, or substances under pressure.

Key risks: fires, explosions, toxic releases.

  🧭 Why Identifying All Energy Sources Matters

Bryan stresses that many LOTO failures happen because:

• Workers isolate only the electrical source

• Residual or stored energy is overlooked

• Equipment has multiple energy sources that interact

• Pressure is not relieved before work begins

• Gravity or mechanical tension is ignored

• Workers assume “off” means “safe”

Effective LOTO requires recognizing every energy source — not just the obvious one.

  🧰 Best Practices Highlighted in the Episode 1. Use equipment‑specific LOTO procedures

Generic procedures miss hidden or secondary energy sources.

2. Verify zero energy

Try‑start, test circuits, bleed pressure, block movement.

3. Control stored and residual energy

Lockout is not enough — energy must be released, blocked, or restrained.

4. Understand how energy can re‑accumulate

Hydraulic drift, thermal expansion, and pressure buildup can occur even after shutdown.

5. Train workers on all energy types

Most employees only think of electrical hazards unless trained otherwise.

  🧑‍🏫 Leadership Takeaways

• LOTO is only effective when all forms of energy are identified and controlled

• Stored energy is often the most dangerous and most overlooked

• Equipment‑specific procedures prevent guesswork

• Verification is essential — never assume energy is isolated

• Leaders must reinforce that LOTO is about controlling energy, not just applying locks

The episode’s core message: Hazardous energy comes in many forms — and missing even one can lead to serious injury.