kSIST FprEN 3-8:2021

SLOVENSKI STANDARD
oSIST prEN 3-8:2020
01-julij-2020
Prenosni gasilniki - 8. del: Zahteve za konstrukcijo, odpornost proti tlaku in
mehanski preskusi za gasilnike z največjim dovoljenim tlakom, enakim ali nižjim
od 30 bar, ki ustrezajo zahtevam EN 3-7

Portable fire extinguishers - Part 8: Requirements for the construction, pressure

resistance and mechanical tests for extinguishers with a maximum allowable pressure

Tragbare Feuerlöscher - Teil 8: Zusätzliche Anforderungen zu EN 3-7 an die konstruktive

Extincteurs d’incendie portatifs - Partie 8 : Exigences pour la construction, la résistance à

admissible est inférieure ou égale à 30 bar et qui sont conformes aux exigences de l’EN

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Extincteurs d'incendie portatifs - Partie 8 : Exigences Tragbare Feuerlöscher - Teil 8: Zusätzliche

pour la construction, la résistance à la pression et les Anforderungen zu EN 3-7 an die konstruktive

essais mécaniques pour extincteurs dont la pression Ausführung, Druckfestigkeit, mechanische Prüfungen

maximale admissible est inférieure ou égale à 30 bar et für tragbare Feuerlöscher mit einem maximal

qui sont conformes aux exigences de l'EN 3-7 zulässigen Druck kleiner gleich 30 bar

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 3-8:2020:2020 E

European foreword ............................................................................................................................................ 5

Introduction .......................................................................................................................................................... 6

1 Scope .......................................................................................................................................................... 7

2 Normative references .......................................................................................................................... 7

3 Terms and definitions ......................................................................................................................... 8

4 Symbols and abbreviations ............................................................................................................... 9

5 Design ........................................................................................................................................................ 9

5.1 Design Parameters ............................................................................................................................... 9

5.2 General.................................................................................................................................................... 10

5.3 Bodies ...................................................................................................................................................... 10

5.3.1 General Test Conditions ................................................................................................................... 10

5.3.2 Burst test ................................................................................................................................................ 10

5.3.3 Crushing Test – low temperature (extinguisher bodies only) ............................................ 11

5.3.4 Macroscopic examination of the extinguisher body .............................................................. 11

5.3.5 Requirements for the base .............................................................................................................. 11

5.3.6 Required for use with plastic components ................................................................................ 12

5.4 Fittings (except pressure gauge, as defined in EN 3-7) ......................................................... 12

5.4.1 Conditions .............................................................................................................................................. 12

5.4.2 Requirements ....................................................................................................................................... 12

5.5 Pressure gauge ..................................................................................................................................... 12

5.5.1 Test conditions .................................................................................................................................... 12

5.5.2 Requirements ....................................................................................................................................... 12

5.6 Pressure test (test pressure PT) – extinguisher bodies, fittings and assemblies ........ 13

5.6.1 Test conditions .................................................................................................................................... 13

5.6.2 Requirements – Extinguisher Bodies .......................................................................................... 13

5.6.3 Requirements – Fittings ................................................................................................................... 13

5.6.4 Requirements – Assembly ............................................................................................................... 13

5.7 Overfill pressure test (for water based media cartridge operated extinguishers

only) ......................................................................................................................................................... 13

5.7.1 General.................................................................................................................................................... 13

5.7.2 Conditions .............................................................................................................................................. 13

5.7.3 Requirements ....................................................................................................................................... 13

5.8 Plastics components (subject to pressure) except hoses, and nozzles ........................... 13

5.9 Resistance to impact .......................................................................................................................... 13

5.9.1 Conditions .............................................................................................................................................. 13

5.9.2 Requirements ....................................................................................................................................... 13

5.10 Resistance to Corrosion .................................................................................................................... 14

5.10.1 External corrosion .............................................................................................................................. 14

5.10.2 Resistance to media ........................................................................................................................... 14

5.10.3 Material compatibility ...................................................................................................................... 14

5.11 Filling opening ..................................................................................................................................... 14

5.12 Safety device ......................................................................................................................................... 14

6 Marking .................................................................................................................................................. 14

6.1 General ................................................................................................................................................... 14

6.2 Extinguisher Body .............................................................................................................................. 14

6.3 Extinguisher assembly ...................................................................................................................... 14

7 Manufacturing, Inspection and testing during production ................................................. 15

7.1 General requirements ....................................................................................................................... 15

7.2 Permanent joining .............................................................................................................................. 15

7.2.1 Introduction ......................................................................................................................................... 15

7.2.2 Welding procedures .......................................................................................................................... 15

7.2.3 Brazing procedures ............................................................................................................................ 15

7.3 Traceability ........................................................................................................................................... 16

7.3.1 Pressure retaining parts .................................................................................................................. 16

7.3.2 Operating devices, filling caps and hose assemblies ............................................................. 16

7.4 Pressure Testing ................................................................................................................................. 16

7.4.1 Personnel ............................................................................................................................................... 16

7.4.2 Proof testing ......................................................................................................................................... 16

7.5 Burst and Crushing tests .................................................................................................................. 16

7.5.1 Extinguisher Bodies ........................................................................................................................... 16

7.5.2 Fittings – subject to pressure ......................................................................................................... 17

7.6 Final Assessment ................................................................................................................................ 18

7.6.1 Test Pressure Verification ............................................................................................................... 18

7.6.2 Final Inspection ................................................................................................................................... 18

8 Materials ................................................................................................................................................ 18

8.1 General ................................................................................................................................................... 18

8.2 Pressure bearing parts ..................................................................................................................... 18

8.3 Non-pressure bearing parts ............................................................................................................ 19

8.4 Plastic Components ............................................................................................................................ 19

8.5 Documentation .................................................................................................................................... 19

9 Propellant Gas Cartridges ................................................................................................................ 19

Annex A (normative) Classification of the different parts of an extinguisher subject to

internal pressure ................................................................................................................................ 20

Annex B (normative) Pressures and temperatures ............................................................................ 21

B.1 The scheme given in Table B.1 illustrate the definitions of pressure given in

Clause 4 .................................................................................................................................................. 21

B.2 The scheme given in Table B.2 illustrate the definitions of temperature given in

Clause 4 and in 6.1.2 .......................................................................................................................... 21

Annex C (normative) Impact test — Resistance to impact by falling weight .............................. 22

C.1 General ................................................................................................................................................... 22

C.2 Apparatus .............................................................................................................................................. 22

C.3 Procedure .............................................................................................................................................. 22

Annex D (normative) Specification for plastics components (except hoses and nozzles) .... 24

D.1 General ................................................................................................................................................... 24

D.2 Requirements for plastics components subject to pressure .............................................. 24

D.2.1 General ................................................................................................................................................... 24

D.2.2 Burst under pressure ........................................................................................................................ 24

D.2.3 Temperature conditioning at TS ........................................................................................... 25

D.2.4 Ageing test – Xenon arc ..................................................................................................................... 25

D.2.5 Impact test after ageing at 20 °C .................................................................................................... 25

D.2.6 Plastic/metal thread design ............................................................................................................ 26

Annex E (normative) Propellant gas cartridges - Marking ............................................................... 28

Annex F (normative) Overfill pressure test ............................................................................................ 29

Annex G (normative) Mechanical strength test (crushing test) ...................................................... 30

G.1 General.................................................................................................................................................... 30

G.2 Long bodies ........................................................................................................................................... 30

G.3 Short bodies .......................................................................................................................................... 31

Annex H (normative) Materials – Quality control documents ......................................................... 33

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2014/68/EU aimed to be covered ............................................ 34

This document (prEN 3-8:2020) has been prepared by Technical Committee CEN/TC 70 “Manual means

This document has been prepared under a Mandate given to CEN by the European Commission and the

European Free Trade Association and supports essential requirements of EU Directive(s).

For relationship with EU Directive 2014/68/EC, see informative Annex ZA, which is an integral part of

EN 3 consists of the following parts, under the general title “Portable fire extinguishers”:

— Part 8: 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

— Part 9: Requirements for the assembly, construction and pressure resistance of CO extinguishers

— Part 10: Provisions for evaluating the conformity of a portable fire extinguisher to EN 3-7.

This document is of relevance, in particular, to the following stakeholder groups representing the market

— health and safety bodies (regulators, accident prevention organizations, market surveillance, etc.)

The above-mentioned stakeholder groups have been given the possibility to participate at the drafting

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

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

This document also applies to the marking of metallic propellant gas cartridges (see Annex E).

NOTE Annex A gives the classification of the different parts forming the portable fire extinguisher.

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 3-7:2004+A1:2007, Portable fire extinguishers - Part 7: Characteristics, performance requirements and

EN ISO 9017:2018, Destructive tests on welds in metallic materials — Fracture test (ISO 9017:2017)

EN ISO 4892-2:2013, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc lamps

EN ISO 15614-1:2017, Specification and qualification of welding procedures for metallic materials —

Welding procedure test — Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys

EN ISO 15614-2:2005, Specification and qualification of welding procedures for metallic materials -

Welding procedure test - Part 2: Arc welding of aluminium and its alloys (ISO 15614-2:2005)

EN ISO 15614-12:2014, Specification and qualification of welding procedures for metallic materials —

Welding procedure test — Part 12: Spot, seam and projection welding (ISO 15614-12:2014)

EN ISO 13585:2012, Brazing - Qualification test of brazers and brazing operators (ISO 13585:2012)

EN ISO 14732:2013, Welding personnel - Qualification testing of welding operators and weld setters for

This standard is also applicable to non-metallic products (see EN 10204:2004, 1.2).

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

pressure measured in the extinguisher after stabilisation during at least 24 h at maximum operating

temperature (T ). For cartridge operated extinguishers, the maximum pressure is the maximum

pressure recorded for 0,5 s during a period of three minutes, excluding the first second after release of

maximum pressure for which the equipment is designed, as specified by the manufacturer and which is

Note 1 to entry: The value of PS for components should be equal to or greater than the value of PS for the

assembly of parts to comprise the pressure retaining part of a fire extinguisher which can include a

extinguisher body, operating device, filling cap, closure and may include a propellant gas cartridge, hose

maximum operating temperature declared by the manufacturer equal to or less than TS

minimum operating temperature declared by the manufacturer equal to or higher than TS

fire extinguisher which is designed to be carried and operated by hand and which in working order has a

refillable or non-refillable pressure receptacle made of metal containing a propellant gas

pressure accessories which include operating devices, filling caps and hose assemblies

The maximum / minimum temperatures for which the equipment is designed as declared by the

For the purposes of this document, the following symbols and abbreviations apply.

D Nominal external diameter of the extinguisher body, or the largest external value of the

— Temperature range (see Figure B.2). The allowable temperature range declared for the extinguisher

The verification of the product design shall be by prototype testing against 5.3 to 5.9.

The samples used for these tests shall be manufactured using the same materials, processes and

The minimum wall thickness (S) required for the body to achieve all the requirements of this standard

All the bodies and fittings used for the tests shall bear all normal markings indicated in Clause 6 and shall

A burst of the extinguisher body, under hydraulic pressure, shall be carried out at (20 ± 5) °C using an

installation which permits a regular increase of pressure at not more than 2 bar/s until burst occurs and

— the main break shall show no signs of brittleness, for example the edges of the break shall not be

radial, but shall be inclined relative to a diametrical plane and shall have a reduction in area over

their entire thickness and shall occur in the cylindrical (parallel) portion of the extinguisher body;

Should the fracture cross the weld from its point of origin it shall not be considered a failure.