Welding, thermal or oxygen cutting, heating, and other fire producing or spark producing operations that may increase the risk of fire or explosion.
Use of open flames, other heat sources and/or spark producing devices in areas where combustible materials may be or do exist. Where there is potential for explosion or fire. OR Medium-risk work in a restricted area (inside a 50 meter radius of a live surface facility). Eg.: painting, pipe fitting in satellites, or excavating in a restricted area.
work within a Confined Space that produces arcs, sparks, flames, heat or other source of ignition. (Contact DES, Fire Safety at (301)405-3970 or https://des.umd.edu/hotworks/ for information about obtaining a hot works permit.)
any work which has an ignition source or a temperature sufficiently high to cause the ignition of a flammable gas mixture, eg welding, gas cutting, electric driven hand tools, etc.
Maintenance or construction work requiring welding, burning, grinding, or drilling.
Hot work is construction work that involves the use of fire or high temperatures, such as welding. In some countries, such as the Nordic countries, a specific license is needed for hot work. The license is meant to ensure that the worker has undergone the necessary safety training, and is able to avoid accidents.