NBN EN 3-7:2004

This standard specifies characteristics, performance requirements and test methods for portable fire extinguishers. Extinguishers for use on calls D fires (fires involving flammable metals) are outside the scope of this standard. Note: the extinction of a metal fire presents a situation so specific (in terms of the metal itself, its form, the configuration of the fire, etc) that it is not possible to define a representative standard fire for the purpose of testing. The efficiency of extinguishers on class D fires need to be established on a case by case basis.