DS EN 3-8:2007 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 Defines the rules of design, type testing, fabrication and inspection control of portable fire extinguishers manufactured with metallic bodies as far as pressure risk is concerned.