ISO/TS 11602-2:2010

TECHNICAL ISO/TS
SPECIFICATION 11602-2
First edition
2010-08-15
Fire protection — Portable and wheeled
fire extinguishers —
Part 2:
Inspection and maintenance
Protection contre l'incendie — Extincteurs portatifs et extincteurs sur
roues —
Partie 2: Contrôle et maintenance

Reference number
©
ISO 2010
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ii © ISO 2010 – All rights reserved

Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Inspection, maintenance and recharging .4
5 Hydrostatic proof-pressure tests.10
Annex A (normative) Competent persons.12
Annex B (normative) Proof-pressure testing.13
Annex C (normative) Obsolete extinguishers.17
Annex D (informative) Hazard types .18
Bibliography.19

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
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International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
In other circumstances, particularly when there is an urgent market requirement for such documents, a
technical committee may decide to publish other types of document:
⎯ an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in
an ISO working group and is accepted for publication if it is approved by more than 50 % of the members
of the parent committee casting a vote;
⎯ an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical
committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting
a vote.
An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a
further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is
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International Standard or be withdrawn.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO/TS 11602-2 was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire
fighting, Subcommittee SC 2, Manually transportable fire extinguishers.
This first edition of ISO/TS 11602-2 cancels and replaces ISO 11602-2:2000, of which it constitutes a
technical revision.
ISO 11602 consists of the following parts, under the general title Fire protection — Portable and wheeled fire
extinguishers:
⎯ Part 1: Selection and installation [Technical Specification]
⎯ Part 2: Inspection and maintenance [Technical Specification]
iv © ISO 2010 – All rights reserved

Introduction
This part of ISO 11602 presents a limited number of provisions for the inspection and maintenance of portable
and wheeled fire extinguishers, in the knowledge that different countries have particular environments and
climates which can affect the size, shape and occupancy of buildings.
A country's specific building configurations can affect the inspection and maintenance of fire extinguishers;
therefore, this part of ISO 11602 could be reinforced in respect of fire-extinguishing performance
characteristics in the presentation of a general-purpose standard.
It is proposed that further investigation be undertaken in light of the above for the purposes of a future revision
of this part of ISO 11602.
TECHNICAL SPECIFICATION ISO/TS 11602-2:2010(E)

Fire protection — Portable and wheeled fire extinguishers —
Part 2:
Inspection and maintenance
1 Scope
This part of ISO 11602 gives requirements for the selection and installation of portable and wheeled fire
extinguishers. It is intended as a companion to ISO/TS 11602-1.
Fire extinguishers are a first line of defence against fires of limited size. They are needed even if the property
is equipped with automatic sprinklers, standpipe and hose, or other fixed protection equipment.
This part of ISO 11602 is not applicable to permanently installed systems for fire extinguishment, even though
portions of such systems may be portable (such as hose and nozzles attached to a fixed supply of
extinguishing media).
Extinguishers for use on board aircraft, watercraft and vehicles are outside the scope of ISO 11602.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 5923, Fire protection — Fire extinguishing media — Carbon dioxide
ISO 7201-1, Fire protection — Fire extinguishing media — Halogenated hydrocarbons — Part 1:
Specifications for halon 1211 and halon 1301
ISO 7201-2, Fire extinguishing media — Halogenated hydrocarbons — Part 2: Code of practice for safe
handling and transfer procedures of halon 1211 and halon 1301
ISO 8421-1, Fire protection — Vocabulary — Part 1: General terms and phenomena of fire
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8421-1 and the following apply.
3.1
clean agent
electrically non-conductive gaseous or vaporizing fire extinguishant that does not leave a residue upon
vaporization
[ISO 7165:2009, 3.5]
3.2
closed recovery system
system that provides for the transfer of media between extinguishers, supply containers, and recharge and
recovery containers so that the escape of media to the atmosphere is minimized
3.3
competent person
person with the necessary training and experience and with access to the requisite tools, equipment, parts
and information (including the manufacturer's service manual) to be capable of carrying out the inspection,
maintenance and recharging procedures of this part of ISO 11602
3.4
film-forming foam
extinguishing media comprising the aqueous film-forming foam (AFFF) and film-forming fluoroprotein (FFFP)
foam types, and including grades suitable for polar solvents (water-soluble flammable liquids) and those not
suitable for polar solvents
3.5
fire extinguisher
extinguisher
appliance containing an extinguishing medium which can be discharged and directed onto a fire by the action
of internal pressure
NOTE 1 See ISO 7165.
NOTE 2 The internal pressure may be provided by
⎯ a stored pressure (pressurization of the extinguishing medium container at the time of charging), or
⎯ a gas cartridge (pressurization at the time of use through the release of gas from a separate cylinder into the medium
container).
NOTE 3 Adapted from ISO 7165:2009, definition 3.11.
3.6
high-pressure cylinder
cylinder having a service pressure higher than 2,5 MPa at 20 °C
3.7
inspection
brief examination to ensure that an extinguisher is available and will operate
NOTE This is intended to give reasonable assurance that the extinguisher is fully charged and operable. This is done
by seeing that it is in its designated place, that it has not been actuated or tampered with, and that there is no obvious
damage or condition to prevent its operation.
3.8
low-pressure cylinder
cylinder having a service pressure of 2,5 MPa or lower at 20 °C
3.9
maintenance
thorough examination of the extinguisher
NOTE This is intended to give maximum assurance that an extinguisher will operate effectively and safely. It includes
a thorough examination and any necessary repair or replacement. It will normally reveal if hydrostatic testing is required.
2 © ISO 2010 – All rights reserved

3.10
non-rechargeable extinguisher
non-refillable extinguisher
fire extinguisher that is not capable of (or intended for) undergoing complete maintenance or hydrostatic
testing, nor of being restored to its full operating capability by means of the standard practices used by fire
equipment service companies
3.11
portable fire extinguisher
fire extinguisher that is designed to be carried and operated by hand and that in working order has a mass of
not more than 20 kg
NOTE Subject to local acceptance, extinguishers having a total mass of 25 kg when fully charged are permitted.
[ISO 7165:2009, 3.15]
3.12
rating
comparative number associated with the classification assigned to an extinguisher and indicative of its
capability in the extinguishment of a standard fire
3.13
rechargeable extinguisher
refillable extinguisher
fire extinguisher that is capable of undergoing complete maintenance, including internal inspection of the
pressure vessel, replacement of all substandard parts and seals, and hydrostatic testing, and of being
recharged with media and propellant and restored to its full operating capability by means of the standard
practices used by fire equipment service companies
NOTE Rechargeable/refillable extinguishers are marked “Recharge Immediately After Any Use” or with a similar
equivalent marking.
3.14
recharging
replacement of the extinguishing medium
NOTE This also includes the propellant for certain types of extinguishers.
3.15
self-expelling-medium extinguisher
extinguisher in which the medium has sufficient vapour pressure at normal operating temperatures to expel
itself
3.16
service
servicing
process that includes maintenance, recharging or hydrostatic testing, or more than one of these
3.17
service pressure
normal operating pressure at 20 °C, as indicated on the pressure gauge or indicator and nameplate of a
stored pressure extinguisher, or the pressure developed in a cartridge-operated extinguisher upon release of
the gas from the cartridge into the medium container at a temperature of 20 °C
3.18
test pressure
pressure at which the extinguisher or its components were tested at the time of manufacture
NOTE The pressure at which the shell was tested is shown on the nameplate or the extinguisher body.
3.19
water-type extinguisher
fire extinguisher which contains a water-based medium, such as water, aqueous film-forming foam (AFFF) or
film-forming fluoroprotein (FFFP) foam and/or antifreeze
3.20
wet chemical extinguisher
fire extinguisher which contains aqueous solutions of potassium acetate, potassium carbonate, potassium
citrate, or combinations of these materials
3.21
wheeled extinguisher
fan appliance on wheels having a total mass of more than 20 kg but not greater than 450 kg, which is
designed to be transported to the fire and operated by one person
NOTE See ISO 11601.
4 Inspection, maintenance and recharging
4.1 General
4.1.1 The owner or designated agent or occupant of a property in which extinguishers are located shall be
responsible for inspection, maintenance and recharging.
4.1.2 The procedure for inspection and maintenance of extinguishers varies considerably. Minimal
knowledge is necessary to perform a monthly inspection procedure as outlined in 4.2. Only competent
persons shall service extinguishers, as outlined in 4.3 and 4.4. See Annex A.
4.1.3 Maintenance and recharging shall be performed in accordance with the appropriate manual(s), using
the proper types of tools, recharge materials, lubricants, and the manufacturer's recommended and identified
replacement parts.
4.1.4 Extinguishers out of service for maintenance or recharge shall be replaced at once by spare
extinguishers of the same type and at least equal classification and rating.
4.2 Inspection
4.2.1 Extinguishers shall be checked when initially placed in service and thereafter should be checked at
approximately 30-day intervals. Extinguishers shall be checked at more frequent intervals when
circumstances require.
4.2.2 Periodic checks shall be made to ensure that
a) the extinguisher is located in the designated place,
b) the extinguisher is unobstructed and visible, with its operating instructions facing outwards,
c) operating instructions are legible,
d) seals and tamper indicators are not broken or missing,
e) the extinguisher is full (by weighing or lifting),
f) the extinguisher is not obviously damaged, corroded or leaking and does not have a clogged nozzle, and
g) where provided, the pressure gauge reading or indicator is in the operable range or position.
4 © ISO 2010 – All rights reserved

4.2.3 When a check of any extinguisher reveals a deficiency in the conditions listed as a) and b) of 4.2.2,
immediate corrective action shall be taken.
4.2.4 When a check of any rechargeable extinguisher reveals a deficiency in any of the conditions c), d), e),
f) or g) of 4.2.2, it shall be subjected to appropriate maintenance procedures.
4.2.5 When a check of any non-rechargeable powder extinguisher reveals a deficiency in any of the
conditions c), d), e), f) or g) of 4.2.2, it shall be removed from service.
4.2.6 When a check of any non-rechargeable clean agent extinguisher reveals a deficiency in any of the
conditions c), d), e), f) or g) of 4.2.2, it shall be removed from service and the medium shall be recovered or
destroyed.
4.3 Maintenance
4.3.1 General
All extinguishers, except as noted in Annex C, shall be subjected to maintenance as follows:
a) not more than once a year but not less than six months apart;
b) at the time of hydrostatic testing;
c) when specifically indicated by an inspection.
Maintenance procedures shall be performed in accordance with 4.3.2.
4.3.2 All extinguishers
4.3.2.1 At each maintenance, all extinguishers shall be subjected to the following:
a) a check of the seal and safety device to determine whether the extinguisher may have been used;
b) subsequent to maintenance, replacement of the safety device and fitting of a new seal;
c) attachment of a label to the extinguisher or marking of a label attached to the extinguisher indicating that
the required maintenance has been performed.
4.3.2.2 For the balance of the procedures to be carried out when maintaining portable fire extinguishers,
extinguisher types are categorized as follows:
⎯ Category 1: stored-pressure-type extinguishers with water, water with additives, or foam as the
extinguishing media;
⎯ Category 2: stored-pressure-type extinguishers with powder or clean agent as the extinguishing media;
⎯ Category 3: gas-cartridge-type extinguishers with water, water with additives, or foam as the
extinguishing media;
⎯ Category 4: gas-cartridge-type extinguishers with powder as the extinguishing media;
⎯ Category 5: carbon dioxide extinguishers.
4.3.2.3 In addition to the requirements of 4.3.2.1 a), b) and c), extinguishers shall be maintained in
accordance with Table 1.
4.3.2.4 Powder extinguishers shall be opened for performing maintenance procedure.
CAUTION — Before any powder extinguisher is opened, it shall be ascertained that, during inspection
and maintenance, the precautions given in 4.3.2.4.1 and 4.3.2.4.2 can and will be observed.
4.3.2.4.1 Powder extinguishers shall be opened only in the driest available conditions and for the minimum
time necessary for examination, to minimize the effect of atmospheric moisture on the powder (powder may
absorb deleterious amounts of moisture if exposed to air of high relative humidity, or if the powder is colder
than the ambient air).
4.3.2.4.2 Mixing or cross-contamination of different types of powder shall be avoided.
Some types of powder are capable of reacting with other types to produce water and carbon dioxide. This
reaction often does not become apparent until after a delay of weeks during which no apparent reaction
occurs. The water causes caking and, in a closed container, the carbon dioxide causes a pressure rise that
can be dangerous. Only extinguishers containing the same powder should be opened and examined at any
one time.
Table 1 — Maintenance procedures for each categorized extinguisher type
Category
No. Maintenance procedure
1 2 3 4 5
1 X X — — —
Examine and verify that the pressure-indicating device (if
fitted) is reading the internal pressure correctly or, where
a device is not fitted, that the internal pressure is correct.
If the extinguisher shows a loss of pressure of more than
10 %, or more than the manufacturer's recommended
maximum loss if less than 10 %, refer to the
manufacturer's instructions for appropriate action.
2 Examine the extinguisher body externally for corrosion or X X X X X
damage. If the extinguisher is slightly corroded, or has
sustained minor damage, it shall be discarded or
subjected to hydrostatic testing. If heavily corroded or
severely damaged, it shall be discarded.
3 Weigh the extinguisher (with or without the operating X X X X X
mechanism, according to the manufacturer's instructions)
or use suitable alternative means to check that it contains
the correct mass of medium. Check the mass against the
mass recorded when it was first put into service.
4 Examine the nozzle and hose (if provided) and clean if X X X X X
necessary. Replace if worn or otherwise not in good
condition.
5 Where extinguishers are designed to have the operating X X X X —
mechanism removed, check the operating mechanism
and discharge control (where fitted) for free movement.
Clean, rectify or replace if necessary. Protect the moving
parts and threads against corrosion with a lubricant as
recommended by the manufacturer.
6 Open the extinguisher or otherwise remove the head — — X X —
assembly. Remove the gas cartridge.
7 (Water with additive, or foam extinguishers only.) Pour the — — X — —
liquid into a clean container. If evidence of deterioration is
apparent (refer to manufacturer's instructions regarding
specific products), discard the liquid and refill with the
manufacturer's specified liquid. Where the foam
concentrate or additive is in a separate container, check
this for leakage. Discard leaking containers and replace
with a new container and charge.
8 Clean the inside and outside of the extinguisher and — — X — —
examine the body externally and internally for corrosion or
damage. If the extinguisher is slightly corroded, or has
sustained minor damage, it shall be discarded or
subjected to hydrostatic testing. If heavily corroded or
severely damaged, it shall be discarded.
6 © ISO 2010 – All rights reserved

Table 1 (continued)
Category
No. Maintenance procedure
1 2 3 4 5
9 — — X X —
Examine the gas cartridge externally for corrosion or
damage. If the gas cartridge is damaged or corroded,
replace the cartridge as recommended by the
manufacturer. Weigh the gas cartridge and check the
mass against that marked on the cartridge. A gas
cartridge which has a content less than the minimum as
marked, or which is found to be leaking, shall be
withdrawn from service or replaced by a cartridge as
recommended by the manufacturer.
10 Clean if necessary and pass air through the vent holes (or — — X X —
other venting device) in the cap.
11 Examine the branch pipe (where used) nozzle, strainer — — X — —
and (where fitted) the internal discharge tube and
breather valve, and clean if necessary.
12 Clean and examine the nozzle, hose and internal — — — X —
discharge tube for blockage by passing air through them;
rectify or replace if necessary.
13 Examine all washers, diaphragms and hose, and replace — — X X —
if damaged or defective. If the hose is fitted at the bottom
end of the extinguisher and a diaphragm is used, it sh
...