SIST EN 3-8:2021

SLOVENSKI STANDARD
01-oktober-2021
Nadomešča:
SIST EN 3-8:2007
SIST EN 3-8:2007/AC:2008
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
equal to or lower than 30 bar, which comply with the requirements of EN 3-7
Tragbare Feuerlöscher - Teil 8: Anforderungen an die konstruktive Ausführung,
Druckfestigkeit und mechanischen Prüfungen für tragbare Feuerlöscher mit einem
Höchstdruck kleiner gleich 30 bar, welche die Anforderungen aus EN 3-7 erfüllen
Extincteurs d’incendie portatifs - Partie 8 : Exigences pour la construction, la résistance à
la pression et les essais mécaniques pour extincteurs dont la pression maximale
admissible est inférieure ou égale à 30 bar et qui sont conformes aux exigences de l’EN
3-7
Ta slovenski standard je istoveten z: EN 3-8:2021
ICS:
13.220.10 Gašenje požara Fire-fighting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 3-8
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2021
EUROPÄISCHE NORM
ICS 13.220.20 Supersedes EN 3-8:2006
English Version
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 the
requirements of EN 3-7
Extincteurs d'incendie portatifs - Partie 8 : Exigences Tragbare Feuerlöscher - Teil 8: Anforderungen an die
pour la construction, la résistance à la pression et les konstruktive Ausführung, Druckfestigkeit und
essais mécaniques pour extincteurs dont la pression mechanischen Prüfungen für tragbare Feuerlöscher
maximale admissible est inférieure ou égale à 30 bar et mit einem Höchstdruck kleiner gleich 30 bar, welche
qui sont conformes aux exigences de l'EN 3-7 die Anforderungen aus EN 3-7 erfüllen
This European Standard was approved by CEN on 11 July 2021.

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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists 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 Management
Centre has the same status as the official versions.

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
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3-8:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
Introduction . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Symbols and abbreviations . 10
5 Design . 10
5.1 Design parameters . 10
5.2 General. 11
5.3 Bodies . 11
5.3.1 General Test Conditions . 11
5.3.2 Burst test . 11
5.3.3 Crushing test – low temperature (extinguisher bodies only) . 12
5.3.4 Macroscopic examination of the extinguisher body . 12
5.3.5 Requirements for the base . 12
5.3.6 Required for use with plastic components . 13
5.4 Fittings (except pressure gauge, as defined in EN 3-7) . 13
5.4.1 Conditions . 13
5.4.2 Requirements . 13
5.5 Pressure gauge . 13
5.5.1 Conditions . 13
5.5.2 Requirements . 13
5.6 Pressure test (test pressure PT) – extinguisher bodies, fittings and assemblies . 14
5.6.1 Conditions . 14
5.6.2 Requirements – Extinguisher bodies . 14
5.6.3 Requirements – Fittings . 14
5.6.4 Requirements – Assembly . 14
5.7 Overfill pressure test (for water based media cartridge operated extinguishers
only) . 14
5.7.1 General. 14
5.7.2 Conditions . 14
5.7.3 Requirements . 14
5.8 Plastics components (subject to pressure) except hoses, and nozzles . 14
5.9 Resistance to impact . 14
5.9.1 Conditions . 14
5.9.2 Requirements . 14
5.10 Resistance to Corrosion . 15
5.10.1 External corrosion . 15
5.10.2 Resistance to media . 15
5.10.3 Material compatibility . 15
5.11 Filling opening . 15
5.12 Safety device . 15
6 Marking . 15
6.1 General. 15
6.2 Extinguisher body . 15
6.3 Extinguisher assembly . 15
7 Manufacturing, Inspection and testing during production . 16
7.1 General requirements . 16
7.2 Permanent joining . 16
7.2.1 Introduction . 16
7.2.2 Welding procedures . 16
7.2.3 Brazing procedures . 16
7.3 Traceability . 16
7.3.1 Pressure retaining parts . 16
7.3.2 Operating devices, filling caps and hose assemblies . 17
7.4 Pressure testing . 17
7.4.1 Personnel . 17
7.4.2 Proof testing . 17
7.5 Burst and crushing tests. 17
7.5.1 Extinguisher bodies . 17
7.5.2 Fittings – subject to pressure . 18
7.6 Final assessment . 19
7.6.1 Test pressure verification . 19
7.6.2 Final Inspection . 19
8 Materials . 19
8.1 General . 19
8.2 Pressure bearing parts . 20
8.3 Non-pressure bearing parts . 20
8.4 Plastic components . 20
8.5 Documentation . 20
9 Propellant gas cartridges . 20
Annex A (normative) Classification of the different parts of an extinguisher subject to internal
pressure . 21
Annex B (normative) Pressures and temperatures . 22
B.1 The scheme given in Table B.1 illustrate the definitions of pressure given in
Clause 4 . 22
B.2 The scheme given in Table B.2 illustrate the definitions of temperature given in
Clause 4 and in 5.1 . 22
Annex C (normative) Impact test — Resistance to impact by falling weight . 23
C.1 General . 23
C.2 Apparatus . 23
C.3 Procedure . 23
Annex D (normative) Specification for plastics components (except hoses and nozzles) . 25
D.1 General . 25
D.2 Requirements for plastics components subject to pressure . 25
D.2.1 General . 25
D.2.2 Burst under pressure . 25
D.2.3 Temperature conditioning at TS . 26
max
D.2.4 Ageing test – Xenon arc . 26
D.2.5 Impact test after ageing at 20 °C . 26
D.2.6 Plastic/metal thread design . 27
Annex E (normative) Propellant gas cartridges - Marking . 29
Annex F (normative) Overfill pressure test . 30
Annex G (normative) Mechanical strength test (crushing test) . 31
G.1 General. 31
G.2 Long bodies . 31
G.3 Short bodies . 32
Annex H (normative) Materials – Quality control documents . 34
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU aimed to be covered . 35

European foreword
This document (EN 3-8:2021) has been prepared by Technical Committee CEN/TC 70 “Manual means of
fire fighting equipment”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by February 2022, and conflicting national standards shall
be withdrawn at the latest by February 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 3-8:2006.
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/EU, see informative Annex ZA, which is an integral part of
this document.
This document is included in a series of documents covering:
a) classification of fires (EN 2).
b) mobile fire extinguishers (series EN 1866).
EN 3 consists of the following parts, under the general title “Portable fire extinguishers”.
— Part 7: Characteristics, performance requirements and test methods;
— 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
the requirements of EN 3-7.
— Part 9: Additional requirements to EN 3-7 for pressure resistance of CO extinguishers.
NOTE The title of EN3-9 will upon revision be amended to read: “Part 9 - Requirements for the Assembly,
Construction and Pressure Resistance of CO2 extinguishers which comply with the requirements of EN3-7.”
— Part 10: Provisions for evaluating the conformity of a portable fire extinguisher to EN 3-7.
List of major changes:
The following sections have been revised:
— title;
— scope;
— materials;
— design;
— permanent joining;
— relationship with the ESR’s;
— relationship and titles to EN 3 series.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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 the United
Kingdom.
Introduction
This document is a product standard.
This document is of relevance, in particular, to the following stakeholder groups representing the market
players with regard to pressure equipment safety:
— pressure equipment manufacturers (small, medium and large enterprises);
— health and safety bodies (regulators, accident prevention organizations, market surveillance, etc.)
— pressure equipment users/employers (small, medium and large enterprises);
— service providers, e.g., for maintenance (small, medium and large enterprises);
The above-mentioned stakeholder groups have been given the possibility to participate at the drafting
process of this document.
1 Scope
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.
2 Normative references
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 test methods
1)
EN 10204:2004, Metallic products — Types of inspection documents
EN 13134:2000, Brazing — Procedure approval
EN ISO 4892-2:2013, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc lamps
(ISO 4892-2:2013)
EN ISO 9017:2018, Destructive tests on welds in metallic materials — Fracture test (ISO 9017:2017)
EN ISO 13585:2012, Brazing — Qualification test of brazers and brazing operators (ISO 13585:2012)
EN ISO 14555:2017, Welding — Arc stud welding of metallic materials (ISO 14555:2017)
EN ISO 14732:2013, Welding personnel — Qualification testing of welding operators and weld setters for
mechanized and automatic welding of metallic materials (ISO 14732:2013)
2)
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
(ISO 15614-1:2017)
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 15614-11:2002, Specification and qualification of welding procedures for metallic materials —
Welding procedure test — Part 11: Electron and laser beam welding (ISO 15614-11:2002)
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)

1)
This standard is also applicable to non-metallic products (see EN 10204:2004, 1.2).
2)
As impacted by EN ISO 15614-1:2017/A1:2019.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
pressure at maximum operating temperature
pressure experimentally measured
P (T )
max
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
max
pressure recorded for 0,5 s during a period of three minutes, excluding the first second after release of
the propellant gas
3.2
maximum allowable pressure
maximum declared pressure
PS
maximum pressure for which the equipment is designed, as specified by the manufacturer and which is
in any case greater than or equal to P (T )
max
Note 1 to entry: The value of PS for components should be equal to or greater than the value of PS for the
extinguisher assembly.
3.3
bursting pressure
P
r
maximum pressure measured during a bursting test
3.4
portable fire extinguisher assembly
assembly of parts to comprise the pressure retaining part of a fire extinguisher which can include a
extinguisher body, operating device, filling cap, closure, a propellant gas cartridge, hose and other
components under pressure, if fitted
3.5
maximum operating temperature
T
max
maximum operating temperature declared by the manufacturer equal to or less than TS
max
3.6
minimum operating temperature
T
min
minimum operating temperature declared by the manufacturer equal to or higher than TS
min
3.7
portable fire extinguisher
fire extinguisher which is designed to be carried and operated by hand and which in working order has a
mass of not more than 20 kg
3.8
propellant gas cartridge
refillable or non-refillable pressure receptacle made of metal, containing a propellant gas
3.9
fittings
pressure accessories which include operating devices, filling caps and hose assemblies
3.10
allowable temperature
TS
maximum / minimum temperatures for which the equipment is designed as declared by the
manufacturer
4 Symbols and abbreviations
For the purposes of this document, the following symbols and abbreviations apply.
PS Maximum allowable pressure, in bar
PT Test pressure ≥ 1,43 x PS in bar
P Bursting pressure (measured) ≥ 2,7 x PS, in bar
r
D Nominal external diameter of the extinguisher body, or the largest external value of the
perpendicular section to the axis, in mm
D Diameter of the mandrel used during the crushing test, in mm
B
P (T ) Pressure at maximum operating temperature, in bar
max
T Maximum operating temperature declared by the manufacturer, in °C
max
T Minimum operating temperature declared by the manufacturer, in °C
min
S Minimum wall thickness declared by the manufacturer, in mm
TS Minimum allowable temperature, in °C
min
TS Maximum allowable temperature, in °C
max
5 Design
5.1 Design parameters
The following parameters shall be declared by the manufacturer:
— PS of the extinguisher;
— PT of the extinguisher;
— material characteristics;
— specification of manufacturing process;
— extinguishing media and propellant;
— temperature range (see Table B.2). The allowable temperature range declared for the extinguisher
body shall be TS to TS ;
min max
where:
— TS = −30 °C or lower (as declared by the manufacturer);
min
— TS = +60 °C or higher (as declared by the manufacturer).
max
The relationship between the different pressures and temperatures is shown in Annex B.
5.2 General
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
equipment as for the intended production.
The minimum wall thickness (S) required for the body to achieve all the requirements of this standard
shall be specified, declared and guaranteed by the manufacturer.
Annex A gives the classification of the different parts forming the portable fire extinguisher.
5.3 Bodies
5.3.1 General Test Conditions
All the bodies and fittings used for the tests shall bear all normal markings indicated in Clause 6 and shall
be in their finished state (e.g. painted).
5.3.2 Burst test
5.3.2.1 Conditions
Three specimens shall be tested.
Burst test is performed at (20 ± 5) °C.
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
permits the variation of pressure to be recorded as a function of time.
5.3.2.2 Requirements
The following requirements apply:
— in all tests P shall be greater than 2,7 × PS;
r
— in all tests P shall be equal to or greater than 20 bar;
r
— the burst test shall not cause the extinguisher body to fragment;
— 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;
— the break shall not show any obvious defects in the material;
— the break shall not originate in the extinguisher body marking area or weld;
NOTE The heat affected zone is not considered to be in or part of the weld.
Should the fracture cross the weld from its point of origin it shall not be considered a failure.
— the burst pressure test shall be carried out at the specified pressures. In the event that a sealing “O”
ring or washer moves out of its housing before burst pressure is reached, and this is not caused by
deformation of the valve or the neck ring, then a special test adapter shall be used to enable the burst
test to be completed.
5.3.3 Crushing test – low temperature (extinguisher bodies only)
5.3.3.1 General
The mechanical strength test shall be carried out in the form of a crushing test used to confirm the
ductility of the extinguisher body.
5.3.3.2 Conditions
A minimum of three specimens shall be used.
Tests shall be carried out in accordance with Annex G after conditioning at TS (+0, −4) °C for at least
min
12 h at this temperature.
The crushing test shall be carried out within 2 min following removal from the conditioning chamber.
All the extinguisher bodies used for the tests shall bear all normal markings indicated in Clause 6 and
shall be in their finished state (e.g. painted).
5.3.3.3 Requirements
Following the crushing test, the extinguisher body shall be subjected to the test pressure PT at
(20 ± 5) °C for 30 s. During the pressure test the extinguisher body shall not have any cracks or leaks.
5.3.4 Macroscopic examination of the extinguisher body
5.3.4.1 Conditions
On five bodies each weld subject to pressure shall be examined.
5.3.4.2 Requirements
The macroscopic examination of a transverse section of the weld, in accordance with the requirements
of EN ISO 9017:2018, shall show complete fusion over the area treated with a preparation acid and any
defects shall be revealed.
If there is any doubt, a microscopic examination of the suspect area shall be carried out.
5.3.5 Requirements for the base
The portable extinguisher shall be constructed so that it may be:
— free standing on a horizontal surface;
and/or
— fixed to a vertical surface.
The shape of the base of the extinguisher body is optional.
Bodies for extinguishers that are capable of free-standing shall either be:
a) fitted with a means to raise the pressure retaining part of the body (base) by at least 5 mm above the
horizontal surface;
or
b) the thickness of the metal in the base of the body in contact with the horizontal surface shall have a
minimum wall thickness of (S + 0,6) mm, where S is the minimum wall thickness declared and
guaranteed by the manufacturer to achieve the minimum burst pressure P for the body.
r
5.3.6 Required for use with plastic components
The threads shall be of the form as specified in D.2.6.
5.4 Fittings (except pressure gauge, as defined in EN 3-7)
5.4.1 Conditions
A minimum of three specimens shall be used.
Tests shall be carried out at TS (+0, −4) °C after being conditioned for a minimum of 12 h at this
min
temperature.
A burst of the fitting, under hydraulic pressure, shall be carried out using an installation which permits a
regular increase of pressure at not more than 2 bar/s until the fitting bursts and permits the variation of
pressure to be recorded as a function of time.
5.4.2 Requirements
The following requirements apply:
— the bursting pressure P shall not be less than 2,7 times the maximum allowable pressure PS, with a
r
minimum of 55 bar;
— the burst test shall not cause the fitting to fragment;
— the break shall not show any obvious defects in the material;
— the break shall not originate in the marking area.
5.5 Pressure gauge
5.5.1 Conditions
Three samples shall be submitted to the pressure test which shall be carried out using apparatus that
permits a regular increase of pressure at a maximum of 2 bar/s until 2,7 times P (T ) is reached.
max
Maintain this pressure for 30 s.
The samples shall be tested at a temperature of (20 ± 5) °C.
5.5.2 Requirements
The samples:
— shall not leak at a pressure less than PT;
— shall not fail at a pressure less than 2,7 times P (T ) or 55 bar whichever is the greater and when
max
failure occurs there shall be no ejection of any components.
This test should be considered to be a destructive test.
5.6 Pressure test (test pressure PT) – extinguisher bodies, fittings and assemblies
5.6.1 Conditions
Extinguisher bodies, fittings and assemblies shall be submitted to the pressure test (at 20 ± 5) °C which
shall be carried out using apparatus that permits a regular increase of pressure at a maximum of 2 bar/s
up to the moment the test pressure is reached.
Five samples of extinguisher body and fittings and one assembly (see 3.4) shall be tested.
5.6.2 Requirements – Extinguisher bodies
The test pressure PT shall not be less than 1,43 times the maximum allowable pressure PS.
The test pressure shall be maintained for a minimum of 30 s and the extinguisher body shall remain
pressure tight.
After the test, the extinguisher body shall not show any visible sign of permanent deformation.
5.6.3 Requirements – Fittings
The test pressure PT shall not be less than 1,43 times the maximum allowable pressure PS.
The test pressure shall be maintained for a minimum of 30 s and the fittings shall remain pressure tight
and show no defects (e.g. cracks, splits or ejection of parts).
5.6.4 Requirements – Assembly
The test pressure PT shall not be less than 1,43 times the maximum allowable pressure PS.
The test pressure shall be maintained for a minimum of 30 s and the assembly shall remain pressure tight
and show no defects (e.g. cracks, splits or ejection of parts).
5.7 Overfill pressure test (for water based media cartridge operated extinguishers only)
5.7.1 General
To ensure the extinguishers will remain safe even in case of overfilling, the extinguishers shall be tested
in accordance with Annex F.
5.7.2 Conditions
The extinguisher shall be conditioned at T (−0, +4) °C for 24 h.
max
Two assemblies shall be tested.
5.7.3 Requirements
No component shall be ejected.
5.8 Plastics components (subject to pressure) except hoses, and nozzles
Plastics components shall comply with the requirements of Annex D.
5.9 Resistance to impact
5.9.1 Conditions
TS (±3 °C) and TS (±3 °C) claimed by the manufacturer shall be used for the tests.
max min
5.9.2 Requirements
When tested in accordance with Annex C, extinguishers shall not show evidence of bursting, breakage or
ejection of components. Leaks are acceptable.
5.10 Resistance to Corrosion
5.10.1 External corrosion
Assemblies shall meet the requirements of EN 3-7:2004+A1:2007, 14.1 “Resistance to external
corrosion”.
5.10.2 Resistance to media
Assemblies shall meet the requirements of EN 3-7:2004+A1:2007, 14.2 “Resistance to media”. All
materials in contact with the extinguishing media shall be either compatible or appropriately treated to
prevent corrosion.
5.10.3 Material compatibility
All materials used in the extinguisher assembly shall be compatible with all other components including
the media.
Particular attention shall be given to galvanic corrosion and stress corrosion.
5.11 Filling opening
The requirements of EN 3-7:2004+A1:2007, 6.3 shall be fulfilled.
5.12 Safety device
The requirements of EN 3-7:2004+A1:2007, 10.3 shall be fulfilled.
6 Marking
6.1 General
The marking of the extinguisher shall comprise at least the following in addition to the markings of
EN 3-7:2004+A1:2007 (see 6.2 to 6.3).
NOTE For marking requirements for Gas Cartridges see Clause 9 and Annex E.
6.2 Extinguisher body
The marks specified below shall be applied to the metal of the extinguisher body by hard stamping or
engraving or other permanent means:
a) mark of the extinguisher body manufacturer as registered, for identification;
b) serial or batch number;
c) year of manufacture, which can be represented by using at least 2 digits (e.g. 13 or 2013);
d) test pressure in bar, with the letters PT before and followed by “BAR” or “bar”.
6.3 Extinguisher assembly
The marks specified below shall be marked on the extinguisher:
a) mark of manufacturer as registered, for identification;
b) serial or batch number;
c) year of manufacture, using at least 2 digits (e.g. 13 or 2013);
d) working pressure at 20 °C (stored pressure extinguishers only);
e) capacity/size of gas cartridge, e.g. 55 g (gas cartridge extinguishers only);
f) identification of the propellant gas (this does not include any tracer gas);
g) operating temperature range of the extinguisher assembly (T /T );
min max
h) maximum allowable pressure of the extinguisher assembly, with the letters PS before and followed
by “BAR” or “bar”.
7 Manufacturing, Inspection and testing during production
7.1 General requirements
The manufacturer of the fire extinguisher shall ensure that the materials and components used in the
fabrication are free from any defect likely to impair the safe use.
7.2 Permanent joining
7.2.1 Introduction
Welds and brazed joints shall be free from defects which may impair the safe use of the extinguisher body.
7.2.2 Welding procedures
7.2.2.1 General
Pressure bearing welds shall be formed using an automatic welding procedure.
The welding procedures shall be based on a welding procedure specification in accordance with
2)
EN ISO 14555:2017, EN ISO 15614-1:2017 , EN ISO 15614-11:2002 or EN ISO 15614-12:2014 and shall
2)
be qualified in accordance with EN ISO 15614-1:2017 or EN ISO 15614-12:2014 or
EN ISO 15614-2:2005.
7.2.2.2 Welding personnel
The welding personnel shall be qualified in accordance with EN ISO 14732:2013.
7.2.3 Brazing procedures
7.2.3.1 General
The brazing design and brazing procedure shall be described in a brazing procedure specification in
accordance with EN 13134:2000.
7.2.3.2 Brazing personnel
The brazer shall be qualified in accordance with EN ISO 13585:2012.
7.3 Traceability
7.3.1 Pressure retaining parts
Batch recording procedures shall be applied on all pressure retaining parts in such a way that they are
fully traceable throughout the manufacturing process from the original material certificates (see
Annex H) to the finished product.
7.3.2 Operating devices, filling caps and hose assemblies
The operating devices, filling caps and hose assemblies which are or can be subjected to pressure during
normal use shall be indelibly marked to permit subsequent identification and traceability.
7.4 Pressure testing
7.4.1 Personnel
The examination personnel shall be competent to carry out the processes involved.
7.4.2 Proof testing
7.4.2.1 General
All extinguisher bodies shall be subjected to the test pressure PT before or after painting.
Fittings and hose assemblies shall be subjected to a pressure test under an adequate sampling plan (ASP).
7.4.2.2 Requirements for extinguisher bodies
The test pressure PT shall not be less than 1,43 times the maximum allowable pressure PS.
The test pressure PT shall be maintained for a minimum of 15 s and the extinguisher body shall remain
pressure tight during this period.
After the test, the extinguisher body shall not show any visible sign of permanent deformation.
7.4.2.3 Requirements for fittings (excluding pressure relief devices and fittings to be ruptured
on over pressure)
The test pressure PT shall not be less than 1,43 times the maximum allowable pressure PS.
The test pressure PT shall be maintained for a minimum of 15 s and the fitting shall remain pressure tight
during this period.
7.5 Burst and crushing tests
7.5.1 Extinguisher bodies
7.5.1.1 Number of extinguisher bodies for tests
The number of bodies to be tested is given in Table 1.
Table 1 — Number of extinguisher bodies to be sampled
Crushing test
Number of bodies per batch Bursting test
(as defined in Annex G)
N ≤ 500 1 2
500 < N ≤ 1 500 2 3
1 500 < N ≤ 3 000 3 4
Every additional 3 000 or part of 3 000 1 1

An extinguisher body that has successfully passed the crushing test (see Annex G) may be utilized for one
of the bursting tests. If this extinguisher body fails the burst test it shall not be considered a failure but
the full number of extinguisher bodies shown in the Table 1 column 3 shall then be tested.
7.5.1.2 Conditions
The test equipment shall permit a regular increase in pressure. The burst pressure shall be recorded.
Tests shall be carried out between + 5 °C and + 40 °C.
7.5.1.3 Requirements
The burst pressure P shall not be less than 2,7 times the maximum allowable pressure PS with a
r
minimum of 20 bar.
The burst test shall not cause the extinguisher body to fragment.
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 diametral plane and shall have a reduction in area over their entire
thickness.
The break shall not show any obvious defects in the material.
The break shall not originate in the extinguisher body marking area or weld.
Should the fracture cross the weld from its point of origin, it shall not be considered a failure.
NOTE The heat affected zone is not considered to be in or part of th
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