Portable fire extinguishers - Characteristics, performance requirements and test methods Ingestion-build-117251 which may be held behind

which may be held behind or surrounded by a membrane through which the target substances can permeate

Squareness

but are applied only to powder type extinguishers which have gained a class B or class A and class B rating

monitoring and reviewing the risks

Portable fire extinguishers - Characteristics, performance requirements and test methods Ingestion-build-117251 which may be held behindBS EN 3 7 specifies the characteristics, performance requirements and test methods for portable fire extinguishers. Reference to the suitability of an extinguisher for use on gaseous fires (class C fires) are at the manufacturers discretion, but are applied only to powder type extinguishers which have gained a class B or class A and class B rating. Suitability of extinguishers for use on class D fires (fires involving flammable metals) is outside the