At what temperature is work considered to be "hot work"?

The designation of "hot work" typically refers to operations that can produce sparks or heat, potentially igniting flammable materials. The industry standard defines hot work as any activity that reaches temperatures of at least 400 degrees Fahrenheit. This includes processes such as welding, cutting, brazing, and any smoking or other operations that create flames.

The threshold for what qualifies as hot work is set to ensure safety in environments where flammable gases, vapors, or combustible dust may be present. At temperatures of 400 degrees and above, the risk of ignition significantly increases, necessitating stricter safety protocols and controls to prevent fire hazards. Thus, the correct identification of 400 degrees as the point at which work is considered to be "hot work" is rooted in these safety considerations.