Personal protective equipment - Flame resistant workwear
2019-01-16 09:32 | writer: admin
Arcing poses some of the most serious safety hazards to workers in the power industry. Arc explosions or lightning hazards include high temperatures in a short period of time (a fraction of a second) (higher than the surface temperature of the sun), hot gases, strong pressure waves from explosions (such as a grenade explosion one inch away) and from vaporization and A shrapnel of molten metal particles. Arc-related injuries include minor burns, severe burns, blindness, loss of hearing and pressure waves, fractures or death. When workers are exposed to an arc, the clothes they wear may play a large role in the severity of the potential injury.
"269" standard (1910.269(1)(6)):
Workers are required to receive training on the potential hazards of the arc and the flames that can be produced by igniting other materials in the area.
Workers are prohibited from wearing clothes and, in the presence of an electric arc, may increase the degree of injury; that is, if the clothes will ignite and continue to burn, or it will melt on the skin. Therefore, workers are generally prohibited from wearing clothing materials that are made entirely of or mixed with synthetic materials, such as acetate, nylon, polyester or rayon.
Flame retardant clothing and "269" standard. OSHA issued an explanatory memorandum to provide guidance for compliance with apparel requirements. This memo provides information on acceptable clothing types and employer assessments of hazards.
Choose a suitable flame retardant garment: If the weight is suitable for the flame and arc conditions that the worker may be exposed to, clothes made of 100% cotton or wool can be accepted. As the heat level increases, these materials do not melt, but they ignite and continue to burn. The amount of heat required to ignite these materials depends on many factors, including the weight, texture, weave, and color of the material. This type of clothing does not meet the "269" standard if it can ignite (and continue to burn) under arc and flame exposure conditions found in the workplace. If they do not choose a flame retardant garment, the employer needs to determine if the garment worn by the worker is acceptable under conditions that he or she may be exposed to. For OSHA clothing requirements, flame retardant clothing is acceptable.