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Class 1 is body belts (single or double D-ring), designed to restrain a person in a hazardous work position, prevent a fall, or arrest it completely within 3 feet (90 cm) . Class 2 is chest harnesses, used only with limited fall hazards (including no vertical free fall), or for retrieving persons, as from a tank or bin.
Class 3: Flammable Liquids A flammable liquid is a liquid having a flash point of not more than 60 °C (140 °F), or any material in a liquid phase with a flash point at or above 37.8 °C (100 °F) that is intentionally heated and offered for transportation or transported at or above its flash point in a bulk packaging.
The publication Life Safety Code, known as NFPA 101, is a consensus standard widely adopted in the United States. [according to whom?] It is administered, trademarked, copyrighted, and published by the National Fire Protection Association and, like many NFPA documents, is systematically revised on a three-year cycle.
In the US, the independent National Fire Protection Association (NFPA) publishes several relevant standards, and they are often adopted by government agencies. Guidance on assessment of hazards is given in NFPA 497 (explosive gas) and NFPA 499 (dust). The American Petroleum Institute publishes analogous standards in RP 500 and RP505.
NFPA 1994 Class 3 must also be rated to protect the user from the same potential exposures of Class 1 and 2, however these ensembles only require the use of air purifying respirator. NFPA 1994 Class 4 ensembles are rated to protect the user from bloodborne pathogens and biological agents and offer no protection against industrial chemicals or ...
The National Fire Protection Association (NFPA) is a U.S.-based international nonprofit organization devoted to eliminating death, injury, property, and economic loss due to fire, electrical, and related hazards.
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