HazCom vs PPE vs Lockout/Tagout — when does each one apply?
Short answer
Hazard Communication applies whenever hazardous chemicals are present. PPE applies whenever a hazard assessment shows protective equipment is needed. Lockout/Tagout applies when employees service or maintain equipment where unexpected start-up or stored energy could injure them. They frequently apply at once — a technician cleaning a machine with solvent triggers all three — and each carries its own training and paperwork.
Side by side
| Hazard Communication | PPE | Lockout/Tagout | |
|---|---|---|---|
| Standard | 1910.1200 | 1910 Subpart I | 1910.147 |
| Trigger | Any hazardous chemical present | Hazard assessment shows exposure | Servicing or maintenance with hazardous energy |
| Written document | Required | Written hazard assessment certification | Required, machine-specific |
| Training | At assignment and on new hazards | Before use; retrain on changes | Authorized, affected, and other employees |
| Periodic check | Update on new chemicals | Reassess when conditions change | Annual periodic inspection |
| Common citation | No written program, missing SDS | No documented hazard assessment | No machine-specific procedures |
Where they overlap
The overlap is where employers get caught. A maintenance tech locking out a press and then degreasing it owes lockout training, PPE from the hazard assessment for the solvent, and HazCom training on the solvent itself. Treating that job as 'one task, one training' leaves two standards unmet and two records missing.
How to tell which you owe
- Chemicals on the shelf → HazCom, always
- A hazard the guard or ventilation cannot remove → PPE, with a written assessment
- Anyone reaching into, cleaning, unjamming, or repairing powered equipment → Lockout/Tagout
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Sources
Last reviewed September 4, 2026. Educational summary based on federal OSHA standards. State plans may impose stricter requirements. Not legal advice.