I was just curious as to why in NFPA 51B, electric soldering irons does not apply to the Standard. It is excluded under 1.3.2 just wondering why, what makes this any different? Thanks in advance.
Define soldering iron.
Does it fall in the scope::
1.1 Scope. 1.1.1* This standard shall cover provisions to prevent injury, loss of life, and loss of property from fire or explosion as a result of hot work. A.1.1.1 Cutting and welding processes using electric arcs or oxy–fuel gas flames are a necessary part of our industrial world. Too often, however, the persons who use, contract, or supervise the use of these processes do not fully appreciate that their improper use can result in loss of life and property by fire and explosion. Approximately 6 percent of fires in industrial properties and many fires in other properties have been caused by cutting and welding, primarily with portable equipment in areas not specifically designed or approved for such work. Cutting and certain arc welding operations produce literally thousands of ignition sources in the form of sparks and hot slag. Electric arcs or oxy–fuel gas flames and hot work pieces are also inherent ignition sources. The majority of fires in which cutting and welding are factors have been caused by sparks. These globules of molten metal have scattered horizontally as far as 35 ft (11 m), setting fire to all kinds of combustible materials. They have also fallen through cracks, pipe holes, or other small openings in floors and partitions, starting fires that have reached serious proportions before being noticed. Electric arcs or oxy–fuel gas flames, in themselves, have rarely caused fire except where they have overheated combustibles in the vicinity of the work or where they have been used on containers that have held combustibles without having and purged. In the latter case, an explosion generally resulted. The heat of the metal being welded or cut has caused fires where the hot pieces were permitted to rest or fall upon combustible materials. Fires and explosions have also been caused where such heat has been transmitted, as in the case of a container, through the metal to a flammable atmosphere or to combustibles within the container. Anything that is combustible or flammable is susceptible to ignition by cutting and welding. The most common materials likely to become involved in fire are those of combustible building construction such as the following: (1) Floors, partitions, and roofs (2) Combustible contents such as wood, paper, textiles, plastics, chemicals, and flammable liquids and gases (3) Combustible ground cover such as grass and brush Preventing hot work fires can best be achieved by separating combustibles from ignition sources or by shielding combustibles.
OHHH I am not an engineer, so you can discount my reply if you want, and I cannot do math.
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