ISO/TS 21985:2022

TECHNICAL ISO/TS
SPECIFICATION 21985
First edition
2022-02
Light gauge metal containers —
Non-refillable LPG cartridges —
General requirements
Récipients métalliques légers — Cartouches de GPL non rechargeables
— Exigences générales
Reference number
ISO/TS 21985:2022(E)
© ISO 2022

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ISO/TS 21985:2022(E)
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© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
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ISO/TS 21985:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Gas filled in cartridge . 2
4.1 Composition . 2
4.2 Nominal LPG capacity . 3
4.3 Odour . . . 3
5 Construction and design . .3
5.1 Construction . 3
5.2 Design . 3
5.2.1 Dimensions of cartridge and cartridge valve . 3
5.2.2 Compressive (stroke) dimension and initial injection stroke of cartridge
valve . 5
6 Material. 6
6.1 Material of cartridge body . 6
6.2 Material of cartridge stem . 6
7 Performance . 6
8 Test methods . 7
8.1 Test condition . 7
8.2 Test instruments and apparatus . 7
8.3 Tests for construction, design, material and performance . 7
8.3.1 General . 7
8.3.2 Vibration test . 7
8.3.3 Drop test . 7
8.3.4 Gas resistance test . 8
8.3.5 Ozone resistance test . 8
8.3.6 Gas tightness test . 8
8.3.7 Pressure resistance test . 8
8.3.8 Stem functioning load test . 9
8.3.9 Repeated use test . 9
8.3.10 LPG composition test . 9
8.3.11 Filled LPG mass test . 9
8.3.12 Test of compressive (stroke) dimension and initial injection stroke
dimension of cartridge valve . 10
8.3.13 Initial partial air pressure test . 10
8.3.14 Valve flow rate test . 10
8.3.15 Flange strength test . 11
9 Marking . .12
Annex A (normative) Specific regional requirements .13
Annex B (informative) Burst prevention device for non-refillable LPG cartridges .15
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ISO/TS 21985:2022(E)
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 technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
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expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 52, Light gauge metal containers.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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TECHNICAL SPECIFICATION ISO/TS 21985:2022(E)
Light gauge metal containers — Non-refillable LPG
cartridges — General requirements
1 Scope
This document specifies minimum requirements for the construction, design, material, performance,
test methods and marking at manufacture of non-refillable liquefied petroleum gas (LPG) cartridges.
This document is applicable to non-refillable LPG cartridges which:
a) predominantly comprise butane fuel gas (iso/normal);
b) have a total nominal capacity of up to 250 g net;
c) are intended to deliver gas in the vapour state when either positioned upright or in a horizontal
orientation;
d) are used with certain types of gas appliances, e.g. portable gas cookers;
e) are classified as UN 2037, RECEPTACLES, SMALL, CONTAINING GAS (GAS CARTRIDGES) without a
release device, non-refillable for the transport of dangerous goods.
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.
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 1431-1:2012, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and
dynamic strain testing
ISO 11949, Cold-reduced tinmill products — Electrolytic tinplate
ISO 11951, Cold-reduced tinmill products — Blackplate
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
non-refillable liquefied petroleum gas cartridge
non-refillable LPG cartridge
cartridge only filled up once with LPG
3.2
flange
guide for setting the non-refillable liquefied petroleum gas cartridges (3.1) in the gas appliances in the
appropriate direction
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ISO/TS 21985:2022(E)
3.3
boss
protruding part at the centre of the non-refillable liquefied petroleum gas cartridges (3.1) that houses the
stem (3.5) or another valve part
3.4
cartridge cap
cap for protecting the gas outlet of the non-refillable liquefied petroleum gas cartridges (3.1) for the gas
appliances
3.5
stem
part for vapour withdrawal which is fitted to a gas appliance
3.6
burst prevention device
part of the non-refillable liquefied petroleum gas cartridges (3.1) which releases pressure or closes the
gas flow inside the cartridges when the pressure or the temperature reaches a pre-set value
3.7
countersink release vent type
CRV type
burst prevention device (3.6) that, when the internal pressure of the cartridge rises and the cartridge is
deformed, the explosion-proof part ruptures installed on the upper body in a state where the body and
the upper body are not separated from each other to discharge the LPG and prevent the explosion
3.8
rim vent release type
RVR type
burst prevention device (3.6) that, when the internal pressure of the cartridge rises and the cartridge
is deformed, the explosion-proof part ruptures installed on the rim in a state where the body and the
upper body are not separated from each other to discharge the LPG and prevent the explosion
3.9
resealing valve type
burst prevention device (3.6) that, when the internal pressure of the cartridge rises, the resealing valve
is opened to discharge the LPG and prevent the explosion, and after decreasing the internal pressure of
the cartridge, the resealing valve is closed and used again
3.10
temperature sensing valve type
burst prevention device (3.6) that, when the internal heat of cartridge rises, while the surface of the pin
inside the cartridge melts, the temperature sensing valve inside the cartridge closes the gas flow
4 Gas filled in cartridge
4.1 Composition
The composition of LPG, when tested by the method described in 8.3.10, shall conform to the
requirements given in Table 1.
Table 1 — Composition
Composition Distribution ratio
C H (butane) ≥ 95 % mass fraction
4 10
Other hydrocarbons ≤ 5 % mass fraction
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ISO/TS 21985:2022(E)
4.2 Nominal LPG capacity
The nominal LPG capacity, when tested by the method described in 8.3.11, shall be up to 250 g.
4.3 Odour
The odour of LPG shall be detectable when LPG mixing ratio to air is 1/1 000 in volume.
5 Construction and design
5.1 Construction
When the test described in 8.3 is carried out for testing the construction of each composition of the
cartridges, each composition shall be proven to have been manufactured with safety and durability
considerations and shall be free from any leakage of LPG, burst or deformation that can be detrimental
to use when used under normal service and transportation conditions.
The pressing jointed part shall be effective in pressing, and the edges likely to be touched by hands
during use shall be smooth.
Exposure to such vibrations and impacts as can occur during transportation or service shall not reduce
the gas tightness and pressure resistance of the cartridges.
The cartridges shall be constructed in such a way that allows the LPG to be discharged in a gaseous
state when it is under normal service conditions.
NOTE Normal service conditions refers to conditions where the cartridge is installed in a gas appliance.
The cartridges shall be provided with a means to prevent LPG from being discharged when it is taken
off from the gas appliances.
The cartridges shall be provided with a means to protect the protruding cartridge valve.
5.2 Design
5.2.1 Dimensions of cartridge and cartridge valve
The dimensions of cartridge and cartridge valve, when tested by the method described in 8.3, shall
conform to the requirements given in Table 2 corresponding to respective parts indicated in Figures 1
and 2.
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ISO/TS 21985:2022(E)
Key
A total height E flange diameter
B outer diameter of can-shell F stem height
C lower can diameter J flange cut-away width
D upper can diameter K flange thickness
Figure 1 — Cartridge
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ISO/TS 21985:2022(E)
Key
G stem diameter
H stem length
I boss diameter
Figure 2 — Cartridge valve
Table 2 — Dimensions of cartridge and cartridge valve
Key item Name Dimensions
b
A Total height (185,0 + 1,5) mm
B Outer diameter of can-shell (65,7 ± 0,5) mm
C Lower can diameter (68,2 ± 0,4) mm
D Upper can diameter (68,5 ± 0,4) mm
E Flange diameter (44,5 ± 0,6) mm
F Stem height (5,6 ± 0,5) mm
G Stem diameter (4,0 + 0,05) mm
H Stem length (7,3 ± 0,5) mm
a b
I Boss diameter (10,65 ± 0,1) mm
J Flange cut-away width (10,3 ± 0,3) mm
K Flange thickness (3,15 ± 0,25) mm
a
Boss diameter shall be an outside diameter measured at a position 1,5 mm below the upper end of the boss.
b
In China and Japan, the dimensions of cartridge and cartridge valve for total height and boss diameter shall conform to
the requirements specified in A.2.
5.2.2 Compressive (stroke) dimension and initial injection stroke of cartridge valve
The compressive (stroke) dimension and the initial injection stroke of cartridge valve, when tested by
the methods described in 8.3.12, shall conform to the requirements given in Table 3.
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ISO/TS 21985:2022(E)
Table 3 — Stroke dimensions of cartridge valve
Item Dimension
mm
Cartridge valve compressive (stroke) dimension 1,7 to 2,8
Initial injection stroke dimension 0,2 to 0,9
6 Material
6.1 Material of cartridge body
The material used for cartridge body shall be as follows:
a) The material shall be that specified in ISO 11949 or ISO 11951.
b) If the material used is a steel or lightweight metal other than specified in ISO 11949 or ISO 11951, it
shall be subjected to the c
...