EN 3 EN 3 specifies requirements for portable fire extinguishers . Compliance with the standard is legally required for the construction of all fire extinguishers in the European Union . EN 3-1: Portable fire extinguishers. Description , duration of operation , class A and B fire test . EN 3-2: Portable fire extinguishers. Tightness, dielectric test, tamping test, special provisions . EN 3-3: Portable fire extinguishers. Construction, resistance to pressure, mechanical tests. EN 3-4: Portable fire extinguishers. Charges , minimum required fire. EN 3-5: Portable fire extinguishers. Specification and supplementary tests. EN 3-6: Portable fire extinguishers. Provisions for the attestation of conformity of portable fire extinguishers in accordance with EN 3-1 to 3-5. Amendment 1 EN 3-7: Portable fire extinguishers. Characteristics , performance requirements and test methods . EN 3-8: Portable fire extinguishers. 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 . EN 3-9: Portable fire extinguishers. Additional requirements to EN 3-7 for pressure resistance of CO2 extinguishers. EN 3-10: Portable fire extinguishers. Provisions for evaluating the conformity of a portable fire extinguisher to EN 3-7. 3-2 and EN 3-4 and EN 3-5 have been withdrawn and were replaced by EN 3-7.
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