Hot Work Critical Safety Rules

Applies when: A permit system requires it

• ✓Verify a valid hot-work permit where the permit system requires one.
• ✓Confirm the work area and scope match the authorization.
• ✓Stop work and reassess the permit if conditions change.

• ✓Check combustibles; remove them or protect fixed items with fire-resistant covers.
• ✓Check floors, openings and opposite surfaces for sparks/heat.
• ✓Assess metal-fume exposure; provide process-matched ventilation/local exhaust.

Applies when: Atmospheric hazards or permit conditions require testing

• ✓Test the atmosphere before work where required.
• ✓Check oxygen/flammable/toxic gases; a gas detector does not replace fume control.
• ✓Use continuous or periodic monitoring when conditions may change.

Applies when: OSHA fire-watch criteria or site risk applies

• ✓Where OSHA watch criteria or site risk applies, assign a trained fire watch with no conflicting duties.
• ✓Ensure all exposed areas remain visible and accessible.
• ✓Authorize the fire watch to stop work and raise the alarm.

• ✓Keep suitable extinguishing equipment immediately available.
• ✓Verify equipment is inspected and ready for use.
• ✓Confirm alarm and emergency communication arrangements.

Applies when: Sparks or heat can affect nearby people or materials

• ✓Confine sparks, slag and hot fragments.
• ✓Screen nearby workers from arc radiation and spatter.
• ✓Assess heat conduction through walls, pipes and metal surfaces.

Applies when: Cylinders and gas hoses are used

• ✓Keep cylinders upright, secured and away from heat.
• ✓Inspect hoses, regulators and connections before use.
• ✓Keep oxygen equipment free from oil and grease.

Applies when: After work requiring a fire watch

• ✓US general industry: at least 30 minutes after welding/cutting requiring a watch.
• ✓Extend for stricter local rules, permits or risk; do not shorten the applicable OSHA minimum.
• ✓Construction 1926.352(e): watch until no fire risk; no fixed 30 min. Check concealed/smouldering fires.