ISO 10286:2021

INTERNATIONAL ISO
STANDARD 10286
NORME
Fifth edition
Cinquième édition
INTERNATIONALE 2021-11
Gas cylinders — Vocabulary
Bouteilles à gaz — Vocabulaire
Gasflaschen — Vokabular
Reference number
Numéro de référence
ISO 10286:2021(E/F)
© ISO 2021

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ISO 10286:2021(E/F)
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© ISO 2021
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
Publié en Suisse
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INTERNATIONAL ISO
STANDARD 10286
Fifth edition
2021-11
Gas cylinders — Vocabulary
Gasflaschen — Vokabular
Bouteilles à gaz — Vocabulaire
Reference number
ISO 10286:2021(E)
© ISO 2021

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ISO 10286:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
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.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
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ISO 10286:2021(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Terms related to pressure receptacles . 1
3.1.1 All pressure receptacles . 1
3.1.2 All gas cylinders . 4
3.1.3 Composite gas cylinders . 4
3.1.4 Acetylene cylinders . 4
3.1.5 Bundles of cylinders, battery vehicles and MEGC . 5
3.2 Terms related to accessories . 6
3.3 Terms related to manufacture . . 10
3.4 Terms related to testing and inspection . 11
3.5 Terms related to characteristics, properties and pressures .13
Annex A (informative) Pressure system for pressure receptacles .19
Annex B (informative) Terms of Clause 3 and additional terminology — Equivalent terms
in French and German .20
Annex C (informative) Figures related to the additional terminology given in Annex B .37
Bibliography .50
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ISO 10286:2021(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 58, Gas cylinders, in collaboration with
the European Committee for Standardization (CEN) Technical Committee CEN/TC 23, Transportable gas
cylinders, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
This fifth edition cancels and replaces the fourth edition (ISO 10286:2015), of which it constitutes a
minor revision. The changes are as follows:
— changes to the formatting and structure throughout;
— editorial changes to fully align with the rules in ISO/IEC Directives Part 2.
In addition to text written in the official ISO languages (English, French), this document gives text in
German. This text is published under the responsibility of the Member Body for Germany (DIN) and is
given for information only. Only the text given in the official languages can be considered as ISO text.
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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ISO 10286:2021(E)
Introduction
The terms and definitions in this document are given in the following layout:
preferred term(s) in bold typeface
admitted term(s) or synonyms, in normal typeface
DEPRECATED: deprecated term deprecated term(s), in normal typeface, with the designation
“DEPRECATED”:
definition the definition, where available, in normal typeface
Note 1 to entry: notes to entry, cross-references and examples.
Figures/non-verbal representations
The terms in this document are sorted in systematic order as far as possible. Further guidance on
terminological presentation can be found in ISO 10241-1.
The definitions support the understanding of the terms used in this document. They have been prepared
with due regard to possible uses in different fields related to gas cylinders. However, it is possible that
they will require adaption for particular uses.
Within this document, the term “ADR” is for simplification used as to also include similar regulations
such as RID and ADN, where appropriate.
[4]
This document has been written so that it is suitable to be referenced in the UN Model Regulations .
Table 1 shows a hierarchical overview of pressure receptacles according to the UN Model Regulations.
Annex A shows the different pressures for pressure receptacles in relation to each other.
Annex B shows a table including equivalent terms for additional terminology.
Annex C shows figures related to the additional terminology given in Annex B.
Terms given in square brackets are not within the scope of this document. They are shown for
information only.
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ISO 10286:2021(E)
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Table 1 — Hierarchical overview of terms for pressure receptacles
small pressure receptacle
receptacle
containing
MEGC
gas (gas
[metal-
battery (multiple-
salvage [closed a
cartridge) [tank ]
pressure bundle of hydride
d
vehicle element gas
cylinder tube pressure cryogenic
drum cylinders storage
b
and container)
receptacle receptacle ]
c
system ]
aerosol
dispenser
a
In scope of CEN/TC 296 and CEN/TC 286.
b
In scope of ISO/TC 220.
c
In scope of ISO/TC 197.
d
This designation is used in the ADR.
NOTE  Within this document, for simplification, the use of the term “ADR” also includes similar regulations such as RID and ADN, where appropriate.

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INTERNATIONAL STANDARD ISO 10286:2021(E)
Gas cylinders — Vocabulary
1 Scope
This document defines terms for gas cylinders.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
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 Terms related to pressure receptacles
3.1.1 All pressure receptacles
3.1.1.1
pressure receptacle
DEPRECATED: receptacle
cylinder, tube, pressure drum, closed cryogenic receptacle, metal-hydride storage system, bundle of
cylinders or salvage pressure receptacle
EXAMPLE Seamless gas cylinder:

3.1.1.2
gas cylinder
cylinder
transportable pressure receptacle of a water capacity not exceeding 150 l
Note 1 to entry: In ISO/TC 58 standards, the term “gas cylinder” is frequently used for clarification.
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ISO 10286:2021(E)
3.1.1.3
tube
seamless transportable pressure receptacle of a water capacity exceeding 150 l but not more than
3 000 l
Note 1 to entry: In ISO/TC 58, standards for composite tubes also with a higher water capacity are under
development.
3.1.1.4
pressure drum
welded transportable pressure receptacle of a water capacity exceeding 150 l and of not more than
1 000 l
3.1.1.5
bundle of cylinders
cylinder bundle
DEPRECATED: cylinder pack
assembly of cylinders that are fastened together and which are interconnected by a manifold and
transported as a unit having a total water capacity not exceeding 3 000 l except that bundles intended
for the transport of toxic gases shall be limited to 1 000 l total water capacity
EXAMPLE

Note 1 to entry: In ISO/TC 58 standards, the term “bundle” is frequently used for simplification.
3.1.1.6
salvage pressure receptacle
pressure receptacle with a water capacity not exceeding 1 000 l into which are placed damaged,
defective, leaking or non-conforming pressure receptacle(s) for the purpose of transport, e.g. for
recovery or disposal
3.1.1.7
small receptacle containing gas
gas cartridge
non-refillable receptacle having a water capacity not exceeding 1 000 ml for receptacles made of metal
and not exceeding 500 ml for receptacles made of synthetic material or glass, containing under pressure
a gas or mixture of gases
Note 1 to entry: This definition is used in the ADR only. There is no definition in the UN Model Regulations.
Note 2 to entry: This note applies to the German language only.
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ISO 10286:2021(E)
3.1.1.8
aerosol dispenser
aerosol
non-refillable receptacle made of metal, glass or plastics and containing a gas, compressed, liquefied
or dissolved under pressure, with or without a liquid, paste or powder and fitted with a release device
allowing the contents to be ejected
EXAMPLE

Note 1 to entry: This note applies to the German language only.
3.1.1.9
metal-hydride storage system
single complete hydrogen storage system, including a receptacle, metal hydride, pressure relief device,
shut-off valve, service equipment and internal components used for the transport of hydrogen only
3.1.1.10
cryogenic receptacle
transportable thermally insulated receptacle for refrigerated liquefied gases, of a water capacity of not
more than 1 000 l
3.1.1.11
MEGC
multiple-element gas container
multimodal assembly of cylinders, tubes or bundles of cylinders which are interconnected by a manifold
and assembled within a framework, including service equipment and structural equipment necessary
for the transport of gases
Note 1 to entry: This definition is taken from the UN Model Regulations. ADR uses a different definition.
3.1.1.12
battery vehicle
vehicle containing elements which are linked to each other by a manifold and permanently fixed to a
transport unit
Note 1 to entry: The following elements are considered to be elements of a battery-vehicle: cylinders, tubes,
bundles of cylinders and pressure drums, as well as certain tanks destined for the carriage of gases with a
capacity of more than 450 l.
Note 2 to entry: This term is used in the ADR only. There is no definition in the UN Model Regulations.
3.1.1.13
tank
portable tank, including a tank container, a road tank-vehicle, a rail tank-wagon or a receptacle to
contain solids, liquids or gases, having a capacity of not less than 450 l when used for the transport of
gases
Note 1 to entry: This definition is taken from the UN Model Regulations. ADR uses a different definition.
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ISO 10286:2021(E)
3.1.1.14
portable
capable of being carried by hand
Note 1 to entry: When used in connection with tanks, this means “transportable”.
3.1.2 All gas cylinders
3.1.2.1
composite cylinder
cylinder reinforced by continuous filaments held in a matrix
3.1.2.2
acetylene cylinder
cylinder manufactured and suitable for the transport of acetylene, containing a porous material and
solvent (where applicable) for acetylene with a valve and other accessories affixed to the cylinder
3.1.2.3
cylinder end
cylinder base or cylinder shoulder
3.1.3 Composite gas cylinders
3.1.3.1
composite overwrap
combination of fibres (including steel wire) and matrix
3.1.3.2
matrix
material that is used to bind and hold the fibres in place
3.1.3.3
liner
inner portion of a composite cylinder, comprising a metallic or non-metallic vessel, whose purpose is
both to contain the gas and transmit the gas pressure to the composite overwrap
3.1.4 Acetylene cylinders
3.1.4.1
porous material
single- or multiple-component material introduced to, or formed in, the cylinder shell, that, due to its
porosity, allows the absorption of a solvent/acetylene solution
Note 1 to entry: The porous material can be either:
— monolithic, consisting of a solid product obtained by reacting materials or by materials connected together
with a binder; or
— non-monolithic, consisting of granular, fibrous or similar materials without the addition of a binder.
3.1.4.2
top clearance
gap between the inside of the cylinder shoulder and the monolithic porous material
3.1.4.3
solvent
liquid that is absorbed by the porous material and is capable of dissolving and releasing acetylene
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ISO 10286:2021(E)
3.1.4.4
specified solvent content
weight of solvent that the acetylene cylinder shall contain and that is established during prototype
testing
3.1.4.5
maximum acetylene content
specified maximum weight of acetylene including saturation acetylene in an
acetylene cylinder
3.1.4.6
maximum acetylene content
specified maximum weight of acetylene including saturation acetylene in
the bundle cylinder
3.1.4.7
maximum acetylene charge
maximum acetylene content minus the saturation acetylene
3.1.4.8
residual gas
residual acetylene
weight of acetylene including the saturation acetylene contained in an acetylene cylinder returned for
filling
3.1.4.9
saturation acetylene
saturation gas
acetylene that remains dissolved in the solvent in the acetylene cylinder at atmospheric pressure
(1,013 bar) and at a temperature of 15 °C
3.1.4.10
tare A
sum of weights of the empty cylinder shell, the porous material, the specified solvent content, the valve,
the coating and the valve guard, where applicable, and all other parts that are permanently attached to
the acetylene cylinder when it is presented to be filled
3.1.4.11
tare S
tare A plus the weight of the saturation acetylene
3.1.4.12
tare F
tare A minus the specified solvent content
3.1.5 Bundles of cylinders, battery vehicles and MEGC
3.1.5.1
frame
structural and non-structural members of a bundle which combine all other components together,
while providing protection for the bundle’s cylinders, valves and manifold, and which enable the bundle
to be transported
EXAMPLE

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ISO 10286:2021(E)
3.1.5.2
manifold
piping system for connecting pressure receptacle(s) valves or fittings to the main valve(s) or the main
connection(s)
EXAMPLE

3.1.5.3
main connection
means of making a gas connection to a bundle/battery vehicle/MEGC
3.1.5.4
main valve
main shut-off valve
DEPRECATED: bundle valve
valve which is fitted to the manifold of a bundle, battery vehicle, battery wagon or MEGC isolating it
from the main connection(s)
3.2 Terms related to accessories
3.2.1
accessory
device fitted to a pressure receptacle needed for operation and/or transport
EXAMPLE Cylinder valve, valve protection cap/valve guard, fitting, pressure regulator, pressure gauge.
3.2.2
fitting
connecting piece of one or more parts having no shut-off function
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ISO 10286:2021(E)
3.2.3
valve operating mechanism
mechanism which closes and opens the valve orifice and which includes the internal and external
sealing systems
EXAMPLE A threaded valve spindle which, when rotated, raises and lowers a seal/seat.
3.2.4
valve operating device
component which actuates the valve operating mechanism
EXAMPLE Handwheel, key, knob, toggle, lever or actuator.
3.2.5
non-return valve
automatic valve which allows gas to flow only in one direction
EXAMPLE

3.2.6
residual pressure valve
RPV
cylinder valve which incorporates a residual pressure device
3.2.7
residual pressure device
RPD
device that prevents ingress of contaminants by maintaining a positive differential pressure between
the pressure within the cylinder and the valve outlet
3.2.8
excess flow device
device designed to close or partially close when the flow of liquid or vapour passing through it exceeds a
predetermined value and to re-open when the pressure differential across the device has been restored
below a certain value
EXAMPLE

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ISO 10286:2021(E)
3.2.9
pressure relief device
PRD
bursting disk, fusible plug and pressure relief valve for protecting the pressure receptacle against
overpressurization
3.2.10
pressure relief valve
DEPRECATED: safety valve
pressure actuated valve held shut by a spring or other means and designed to relieve excessive pressure
automatically by starting to open at a set pressure and re-closing after the pressure has fallen below
the set pressure
EXAMPLE

3.2.11
valve protection cap
device securely fixed over the valve during handling, transport and storage and which is removed for
access to the valve
EXAMPLE

3.2.12
valve guard
device securely fixed over the valve during handling, transport and storage and which does not need to
be removed for access to the valve
EXAMPLE

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ISO 10286:2021(E)
3.2.13
valve shroud
integral part of a welded cylinder or pressure drum for valve protection during transport, handling and
storage
EXAMPLE

3.2.14
dust cap
device which is intended to protect the external inlet or outlet connection of a pressure receptacle valve
against the ingress of dust, dirt or other contamination
EXAMPLE

3.2.15
dust plug
device which is intended to protect the internal inlet or outlet connection of a pressure receptacle valve
against the ingress of dust, dirt or other contamination
3.2.16
sealing cap
device which is intended to seal the external outlet connection of a pressure receptacle valve
EXAMPLE

3.2.17
sealing plug
device which is intended to seal the internal outlet connection of a pressure receptacle valve
EXAMPLE

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ISO 10286:2021(E)
3.2.18
periodic inspection date ring
DEPRECATED: test date ring
ring indicating the year of the next periodic inspection
EXAMPLE

3.2.19
risk label
label giving information on the primary and subsidiary risks of the content given by a square set at an
angle of 45° (diamond-shaped)
3.2.20
precautionary label
label giving information on the recommended measures to minimize or prevent adverse effects
resulting from exposure to the content, which includes the UN no. and the risk label
EXAMPLE

3.3 Terms related to manufacture
3.3.1
procedure
series of actions conducted in a certain order or manner
3.3.2
method
element of a procedure
3.3.3
workmanship
quality of manufacturing
3.3.4
autofrettage
pressure application procedure which strains the metal liner past its yield strength sufficient to cause
permanent plastic deformation, and results in the liner having compressive stresses and the fibres
having tensile stresses when at zero internal gauge pressure
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ISO 10286:2021(E)
3.4 Terms related to testing and inspection
3.4.1
testing
carrying out one or more test(s)
3.4.2
test
technical operation(s) for determining one or more characteristics according to a specified procedure
to identify differences between specified, expected and actual results
3.4.3
inspection
evaluation of conformity by observation and judgement accompanied as appropriate by measurement,
examination, testing or gauging
3.4.4
verification
DEPRECATED: check
confirmation, by examination of objective evidence, that specified requirements have been fulfilled
3.4.5
examination
process having the object of determining a condition by judgement
Note 1 to entry: The examination results in a pass or fail or further measurement, testing or gauging.
3.4.6
maintenance
refurbishment
DEPRECATED: reconditioning
set of activities performed during the operating life of pressure equipment to ensure it complies with
the relevant specification
Note 1 to entry: Maintenance can include cleaning and replacing worn or damaged parts meeting the original
specification.
3.4.7
periodic inspection and maintenance
planned inspection and maintenance task carried out at specified intervals
Note 1 to entry: This term is mainly used for acetylene and sub-atmospheric cylinders.
3.4.8
repair
set of activities performed on defective pressure equipment to restore its compliance with the relevant
specification
Note 1 to entry: Repair can include replacing worn or damaged parts meeting the original specification.
3.4.9
certificate
document that records the conformity of pressure equipment with specified requirements
Note 1 to entry: Certificates can also apply to processes, systems, persons or organizations.
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ISO 10286:2021(E)
3.4.10
competent authority
any body or authority designated or otherwise recognized as such for any purpose in each country by
its government
Note 1 to entry: The term “competent body” is not to be used. UN Model recommendations only use “competent
authority” and “inspection body”.
3.4.11
inspection body
independent inspection and testing body approved by the competent authority
Note 1 to entry: This note only applies to the German language.
3.4.12
competent person
DEPRECATED: authorized person
person who is qualified, trained, experienced and approved to perform specified activities such as
periodic inspection and test, welding, etc.
3.4.13
inspector
person who is qualified, trained, experienced and authorized to perform inspection and testing
3.4.14
burst pressure ratio
ratio of burst pressure to test pressure
Note 1 to entry: Sometimes it is used as ratio of burst pressure to working pressure.
3.4.15
leak
loss of fluid across the valve seat (internal leak) or to atmosphere (external leak)
3.4.16
bursting
burst
structural failure of an object due to pressure with extended propagation
Note 1 to entry: For a pressure receptacle, the two failure modes are leak or burst.
Note 2 to entry: In the past, the term “rupture” was sometimes used.
3.4.17
imperfection
any departure of a quality characteristic from its intended level or state
Note 1 to entry: The existence of an imperfection does not necessarily imply nonconformity with the specification,
nor does it have necessarily any implication as to the usability of a product. An imperfection should be rated on
a scale of severity, in accordance with appropriate specifications, to establish whether or not the product is of
acceptable quality.
3.4.18
defect
DEPRECATED: fault
imperfection of sufficient magnitude to warrant rejection of the product based on specified criteria
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ISO 10286:2021(E)
3.4.19
flaw
imperfection or defect in the structure of a material
Note 1 to entry: In many standards, the term is used for a machined notch introduced for calibration or testing
purposes.
3.4.20
bulge
visible swelling of the wall
3.4.21
dent
flat
visible depression in the wall that has neither penetrated nor removed metal
3.4.22
cut
gouge
groove
metallic impression
scale impression
impression in the wall where metal has been removed, displaced or redistributed
Note 1 to entry: The appropriate term shall be chosen depending on the context.
3.4.23
blister
small bulge on the wall containing a continuous layer of inclusions
3.4.24
lamination
layering of the material with a surface breaking imperfection
3.4.25
crack
split or separation in the metal typically appearing as a line on the surface
3.4.26
pitting
small holes in metal due to chemical or water attack
3.5 Terms related to characteristics, properties and pressures
3.5.1
gas
1)
any substance that is completely gaseous at 1,013 bar and 20 °C or has a vapour pressure exceeding
3 bar at 50 °C
Note 1 to entry: The word “substance” encompasses pure substances as well as mixtures.
3.5.2
gas mixture
...