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1.1* Scope. This standard specifies requirements for Class A foam and the chemicals used to produce Class A foam that is used to control, suppress, or prevent fires in Class A fuels. A.1.1 Class A foam solutions are generally used at concentrations in the range of 0.1 percent to 1.0 percent, and testing over this range of concentrations is required by this standard. However, situations can occur when either lower- or higher concentration solutions would be more effective. For example, Class A foam solutions lower than 0.1 percent concentration can, in some cases, be as effective as higher concentrations in wetting and penetrating into deep-seated fires. Also, concentrations higher than 1.0 percent can have benefits in some situations. See NFPA 1145, Guide for the Use of Class A Foams in Manual Structural Fire Fighting.
This standard defines the acceptance requirements and test methods for fire-fighting foam chemicals that are used to control, suppress, or prevent fires in Class A fuels.
Characteristics and acceptance requirements are provided for foam, foam concentrate, and foam solution, along with information on labeling and documentation. Test methods address exposure protection effectiveness; health, safety, and environmental considerations; physical properties; corrosion and materials compatibility; packaging; and documentation.
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© National Fire Protection Association (NFPA) 2016