Light gauge metal containers — Non-refillable LPG cartridges — General requirements

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.

Récipients métalliques légers — Cartouches de GPL non rechargeables — Exigences générales

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ISO/TS 21985:2022 - Light gauge metal containers — Non-refillable LPG cartridges — General requirements Released:2/8/2022
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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)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on

the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below

or ISO’s member body in the country of the requester.
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO 2022 – All rights reserved
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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

iii
© ISO 2022 – All rights reserved
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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).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

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.
© ISO 2022 – All rights reserved
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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
© ISO 2022 – All rights reserved
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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.
© ISO 2022 – All rights reserved
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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
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

Boss diameter shall be an outside diameter measured at a position 1,5 mm below the upper end of the boss.

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
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
...

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