Hot work includes any task that generates heat, sparks, or open flame. Hot work can ignite flammable materials or cause burns. In mechanical construction, hot work typically includes:
- welding, cutting, or grinding
- torch work (oxy-acetylene, plasma cutting, brazing, soldering, and pin welding)
- spark-producing tools
Even small-scale grinding or cutting can be considered hot work if sparks are produced.
Hazards of Hot Work
- fire or explosion from sparks, slag, or molten metal
- burns to hands, arms, or body
- eye injuries from UV light, sparks, or flying particles
- damage to clothing and ignition of synthetic fabrics
PPE Requirements for Hot Work
Proper PPE is mandatory for hot work. Incorrect gloves or clothing can fail quickly and lead to severe burns.
Minimum Hot Work PPE:
- Gloves: Must be heat-resistant welding or leather gloves.
- Do NOT use Maxiflex or other thin coated gloves when performing hot work. These will melt when exposed to sparks and stick to your skin, making burns worse. If you only have Maxiflex gloves and are going to perform hot work, stop what you are doing, and talk to your foreman so you can get the proper gloves.
- Clothing:
- Wear non-synthetic, flame-resistant cotton or wool clothing.
- No polyester, nylon, or blends – they melt onto skin when exposed to heat.
- Long sleeves and pants required; cuffs should be secured to prevent hot slag entry.
- Eye Protection:
- Safety glasses with side shields are the minimum.
- Welding shield or face shield may be required when applicable.
- Head/Face Protection:
- Welding hood or face shield when cutting, grinding, or welding.
- Other PPE:
- Hearing protection when grinding or working in noisy environments.
- Respiratory protection if required by the work area.
Best Practices During Hot Work
- Inspect the work area for combustibles; remove if present or cover with fire-resistant blankets.
- Keep a fire extinguisher within reach.
- Complete a hot work permit and maintain a fire watch during and after work for at least 60 minutes after work completion.
- Never take shortcuts on PPE – it is your last line of defense.