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BS EN 3-8:2021:2022 Edition

BS EN 3-8:2021:2022 Edition

$167.15

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

Published By Publication Date Number of Pages
BSI 2022 42
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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.

PDF Catalog

PDF Pages PDF Title
2 undefined
12 1 Scope
2 Normative references
13 3 Terms and definitions
14 4 Symbols and abbreviations
5 Design
5.1 Design parameters
15 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
16 5.3.3 Crushing test – 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
17 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
18 5.6 Pressure test (test pressure PT) – extinguisher bodies, fittings and assemblies
5.6.1 Conditions
5.6.2 Requirements – Extinguisher bodies
5.6.3 Requirements – Fittings
5.6.4 Requirements – 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
19 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
20 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
21 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
22 7.5.1.2 Conditions
7.5.1.3 Requirements
7.5.1.4 Failure
7.5.2 Fittings – subject to pressure
7.5.2.1 Number of Fittings for tests
23 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
24 8.2 Pressure bearing parts
8.3 Non-pressure bearing parts
8.4 Plastic components
8.5 Documentation
9 Propellant gas cartridges
25 Annex A (normative)Classification of the different parts of an extinguisher subject to internal pressure
26 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
27 Annex C (normative)Impact test — Resistance to impact by falling weight
C.1 General
C.2 Apparatus
C.3 Procedure
29 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
30 D.2.3 Temperature conditioning at TSmax
D.2.4 Ageing test – Xenon arc
D.2.5 Impact test after ageing at 20 °C
31 D.2.6 Plastic/metal thread design
33 Annex E (normative)Propellant gas cartridges – Marking
34 Annex F (normative)Overfill pressure test
35 Annex G (normative)Mechanical strength test (crushing test)
G.1 General
G.2 Long bodies
36 G.3 Short bodies
38 Annex H (normative)Materials – Quality control documents
39 Annex ZA (informative)Relationship between this European Standard and the essential requirements of Directive 2014/68/EU aimed to be covered

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