Occupational health & safety
Hot Work
Work involving open flames, sparks, or heat — welding, cutting, grinding, brazing — that requires permit-to-work controls outside designated safe areas.
Definition
Hot work is any operation that produces open flames, sparks, molten material, or heat capable of igniting nearby combustible or flammable materials — typically welding, oxy-fuel cutting, brazing, soldering, and grinding. Because of the ignition risk, hot work performed outside designated safe areas is controlled through a documented permit-to-work system: area inspection, hazard assessment, controls, authorisation, monitoring, and fire watch, as reflected in OSHA standard 29 CFR 1910.252 and NFPA 51B.
References
regulatory basis
definition and permit practice
Overview
What it means
Hot work is a leading cause of industrial fires, especially during maintenance and shutdowns when normal safeguards are disturbed. The permit system converts an informal judgement into a structured check: has the area been cleared, are combustibles removed or shielded, is a fire watch posted, and does monitoring continue after the work ends, since fires can smoulder for hours.
How it is used
The term is standard in construction, shipbuilding, oil and gas, and manufacturing safety management, contractor control, and insurance requirements.
Why it matters
Some of the deadliest industrial fires have started with routine hot work; the permit discipline is a proven, cheap control.
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