This document specifies, as far as the pressure risk is concerned, the rules of design, type testing, fabrication and inspection control of portable fire extinguishers with a metallic body which comply with the requirements of EN 3-7:2004+A1:2007. This part of EN 3 applies to portable fire extinguishers of which the maximum allowable pressure PS is lower than or equal to 30 bar and containing non-explosive, non-flammable, non-toxic and non-oxidising fluids. This document also applies to the marking of metallic propellant gas cartridges (see Annex E). This document does not apply to carbon dioxide fire extinguishers.<\/p>\n
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|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 4 Symbols and abbreviations 5 Design 5.1 Design parameters <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 5.2 General 5.3 Bodies 5.3.1 General Test Conditions 5.3.2 Burst test 5.3.2.1 Conditions 5.3.2.2 Requirements <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 5.3.3 Crushing test \u2013 low temperature (extinguisher bodies only) 5.3.3.1 General 5.3.3.2 Conditions 5.3.3.3 Requirements 5.3.4 Macroscopic examination of the extinguisher body 5.3.4.1 Conditions 5.3.4.2 Requirements 5.3.5 Requirements for the base <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 5.3.6 Required for use with plastic components 5.4 Fittings (except pressure gauge, as defined in EN 37) 5.4.1 Conditions 5.4.2 Requirements 5.5 Pressure gauge 5.5.1 Conditions 5.5.2 Requirements <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 5.6 Pressure test (test pressure PT) \u2013 extinguisher bodies, fittings and assemblies 5.6.1 Conditions 5.6.2 Requirements \u2013 Extinguisher bodies 5.6.3 Requirements \u2013 Fittings 5.6.4 Requirements \u2013 Assembly 5.7 Overfill pressure test (for water based media cartridge operated extinguishers only) 5.7.1 General 5.7.2 Conditions 5.7.3 Requirements 5.8 Plastics components (subject to pressure) except hoses, and nozzles 5.9 Resistance to impact 5.9.1 Conditions 5.9.2 Requirements <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 5.10 Resistance to Corrosion 5.10.1 External corrosion 5.10.2 Resistance to media 5.10.3 Material compatibility 5.11 Filling opening 5.12 Safety device 6 Marking 6.1 General 6.2 Extinguisher body 6.3 Extinguisher assembly <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 7 Manufacturing, Inspection and testing during production 7.1 General requirements 7.2 Permanent joining 7.2.1 Introduction 7.2.2 Welding procedures 7.2.2.1 General 7.2.2.2 Welding personnel 7.2.3 Brazing procedures 7.2.3.1 General 7.2.3.2 Brazing personnel 7.3 Traceability 7.3.1 Pressure retaining parts <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 7.3.2 Operating devices, filling caps and hose assemblies 7.4 Pressure testing 7.4.1 Personnel 7.4.2 Proof testing 7.4.2.1 General 7.4.2.2 Requirements for extinguisher bodies 7.4.2.3 Requirements for fittings (excluding pressure relief devices and fittings to be ruptured on over pressure) 7.5 Burst and crushing tests 7.5.1 Extinguisher bodies 7.5.1.1 Number of extinguisher bodies for tests <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 7.5.1.2 Conditions 7.5.1.3 Requirements 7.5.1.4 Failure 7.5.2 Fittings \u2013 subject to pressure 7.5.2.1 Number of Fittings for tests <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 7.5.2.2 Conditions 7.5.2.3 Requirements 7.5.2.4 Failure 7.6 Final assessment 7.6.1 Test pressure verification 7.6.2 Final Inspection 8 Materials 8.1 General <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 8.2 Pressure bearing parts 8.3 Non-pressure bearing parts 8.4 Plastic components 8.5 Documentation 9 Propellant gas cartridges <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Annex A (normative)Classification of the different parts of an extinguisher subject to internal pressure <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Annex B (normative)Pressures and temperatures B.1 The scheme given in Table B.1 illustrate the definitions of pressure given in Clause 4 B.2 The scheme given in Table B.2 illustrate the definitions of temperature given in Clause 4 and in 5.1 <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Annex C (normative)Impact test \u2014 Resistance to impact by falling weight C.1 General C.2 Apparatus C.3 Procedure <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Annex D (normative)Specification for plastics components (except hoses and nozzles) D.1 General D.2 Requirements for plastics components subject to pressure D.2.1 General D.2.2 Burst under pressure <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | D.2.3 Temperature conditioning at TSmax D.2.4 Ageing test \u2013 Xenon arc D.2.5 Impact test after ageing at 20 \u00b0C <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | D.2.6 Plastic\/metal thread design <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Annex E (normative)Propellant gas cartridges – Marking <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Annex F (normative)Overfill pressure test <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Annex G (normative)Mechanical strength test (crushing test) G.1 General G.2 Long bodies <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | G.3 Short bodies <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Annex H (normative)Materials \u2013 Quality control documents <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | Annex ZA (informative)Relationship between this European Standard and the essential requirements of Directive 2014\/68\/EU aimed to be covered <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Portable fire extinguishers – Requirements for the construction, pressure resistance and mechanical tests for extinguishers with a maximum allowable pressure equal to or lower than 30 bar, which comply with the requirements of EN 3-7<\/b><\/p>\n |