This standard lays down technical specifications for extinguisher bodies and their accessories. It applies to the bodies of extinguishers in which the service pressure does not exceed 25 bar and to propellant gas cartridges.
A specific clause gives requirements relative to carbon dioxide extinguishers' bodies.
BS EN 3-3:1996 history
2007BS EN 3-8:2006 Portable fire extinguishers — Part 8: Additional requirements to EN 3-7 for the construction, resistance to pressure and mechanical tests for extinguishers with a maximum allowable pressure equal to or lower than 30 bar
1996BS EN 3-3:1996 Portable fire extinguishers - Construction, resistance to pressure, mechanical tests