SIST EN ISO 20475:2021
(Main)Gas cylinders - Cylinder bundles - Periodic inspection and testing (ISO 20475:2018)
Gas cylinders - Cylinder bundles - Periodic inspection and testing (ISO 20475:2018)
ISO 20475:2018 specifies the requirements for the periodic inspection and testing of cylinder bundles containing compressed, liquefied and dissolved gas.
NOTE Additional requirements for acetylene cylinder bundles are provided in Annex A.
ISO 20475:2018 also establishes general principles for the maintenance of cylinder bundles.
ISO 20475:2018 is not applicable to acetylene bundles with solvent-free acetylene cylinders.
ISO 20475:2018 excludes the requirements for cylinder bundles when they are a part of a battery vehicle. For some specific applications, e.g. offshore, additional requirements can apply.
Gasflaschen - Flaschenbündel - Wiederkehrende Inspektion und Prüfung (ISO 20475:2018)
Dieses Dokument legt die Anforderungen für die wiederkehrende Inspektion und Prüfung von Flaschenbündeln fest, die verdichtetes, verflüssigtes und gelöstes Gas enthalten.
ANMERKUNG Zusätzliche Anforderungen für Acetylen Flaschenbündel sind in Anhang A enthalten.
Dieses Dokument enthält außerdem Angaben zur Instandhaltung von Flaschenbündeln.
Dieses Dokument gilt nicht für Acetylenbündel mit lösemittelfreien Acetylenflaschen.
Dieses Dokument deckt nicht die Anforderungen für Flaschenbündel als Bestandteil eines Batteriefahrzeugs ab. Für einige bestimmte Anwendungen, z. B. Offshore, können zusätzliche Anforderungen gelten.
Bouteilles à gaz - Cadres de bouteilles - Contrôles et essais périodiques (ISO 20475:2018)
Le présent document spécifie les exigences relatives au contrôle périodique et aux essais des cadres de bouteilles contenant un gaz comprimé, liquéfié et dissous.
NOTE Des exigences supplémentaires relatives aux cadres de bouteilles d'acétylène sont fournies à l'Annexe A.
Le présent document établit également les principes généraux relatifs à la maintenance des cadres de bouteilles.
Le présent document ne s'applique pas aux cadres de bouteilles d'acétylène équipés de bouteilles d'acétylène sans solvant.
Le présent document exclut les exigences relatives aux cadres de bouteilles faisant partie d'un véhicule-batterie. Pour certaines applications spécifiques, par exemple offshore, des exigences supplémentaires peuvent s'appliquer.
Plinske jeklenke - Snopi jeklenk - Periodični pregledi in preskusi (ISO 20475:2018)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 20475:2021
01-februar-2021
Plinske jeklenke - Snopi jeklenk - Periodični pregledi in preskusi (ISO 20475:2018)
Gas cylinders - Cylinder bundles - Periodic inspection and testing (ISO 20475:2018)
Gasflaschen - Flaschenbündel - Wiederkehrende Inspektion und Prüfung (ISO
20475:2018)
Bouteilles à gaz - Cadres de bouteilles - Contrôles et essais périodiques (ISO
20475:2018)
Ta slovenski standard je istoveten z: EN ISO 20475:2020
ICS:
23.020.35 Plinske jeklenke Gas cylinders
SIST EN ISO 20475:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN ISO 20475:2021
---------------------- Page: 2 ----------------------
SIST EN ISO 20475:2021
EN ISO 20475
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2020
EUROPÄISCHE NORM
ICS 23.020.35
English Version
Gas cylinders - Cylinder bundles - Periodic inspection and
testing (ISO 20475:2018)
Bouteilles à gaz - Cadres de bouteilles - Contrôles et Gasflaschen - Flaschenbündel - Wiederkehrende
essais périodiques (ISO 20475:2018) Inspektion und Prüfung (ISO 20475:2018)
This European Standard was approved by CEN on 13 December 2020.
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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20475:2020 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 20475:2021
EN ISO 20475:2020 (E)
Contents Page
European foreword . 3
2
---------------------- Page: 4 ----------------------
SIST EN ISO 20475:2021
EN ISO 20475:2020 (E)
European foreword
The text of ISO 20475:2018 has been prepared by Technical Committee ISO/TC 58 "Gas cylinders” of
the International Organization for Standardization (ISO) and has been taken over as EN ISO 20475:2020
by Technical Committee CEN/TC 23 “Transportable gas cylinders” the secretariat of which is held by
BSI.
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 June 2021, and conflicting national standards shall be
withdrawn at the latest by June 2021.
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.
According to the CEN-CENELEC Internal Regulations, the national standards organizations 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.
Endorsement notice
The text of ISO 20475:2018 has been approved by CEN as EN ISO 20475:2020 without any modification.
3
---------------------- Page: 5 ----------------------
SIST EN ISO 20475:2021
---------------------- Page: 6 ----------------------
SIST EN ISO 20475:2021
INTERNATIONAL ISO
STANDARD 20475
First edition
2018-02
Gas cylinders — Cylinder bundles —
Periodic inspection and testing
Bouteilles à gaz — Cadres de bouteilles — Contrôles et essais
périodiques
Reference number
ISO 20475:2018(E)
©
ISO 2018
---------------------- Page: 7 ----------------------
SIST EN ISO 20475:2021
ISO 20475:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 20475:2021
ISO 20475:2018(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Procedures for periodic inspections and tests . 4
4.1 General . 4
4.2 Periodic inspection and tests . 4
5 Inspections and tests. 5
5.1 General . 5
5.2 Identification of cylinders/bundles and preparation for inspections and tests. 5
5.3 Depressurization of manifold and individual cylinders . 5
5.4 Disassembly of the bundle . 6
5.5 Periodic inspection and testing of cylinders . 6
5.6 Inspection of the frame, manifold and valve condition . 6
5.6.1 General. 6
5.6.2 Frame . 6
5.6.3 Manifolds . 6
5.6.4 Valves and fittings . 6
5.7 Bundle reassembly and testing . 7
6 Stamp marking . 7
7 Documentation . 7
Annex A (normative) Additional requirements for the periodic inspection and testing of
acetylene bundles . 9
Bibliography .11
© ISO 2018 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 20475:2021
ISO 20475:2018(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 on 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 the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC 4,
Operational requirements for gas cylinders.
iv © ISO 2018 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 20475:2021
ISO 20475:2018(E)
Introduction
The principal aim of a periodic inspection and testing procedure is that, at the completion of the test,
the cylinder bundles may be reintroduced into service for a further period of time.
Periodic inspection and testing of cylinder bundles is carried out in conjunction with the retest period
of the cylinders within the bundle in order to comply with national and regional transport regulations.
If there are any doubts, inspectors should consult the bundle/cylinder's manufacturer so that the
manufacturer's current recommendations are taken into account.
This document is intended to be used under a variety of national regulatory regimes, but has been
[10]
written so that it is suitable for the application of the UN Model Regulations .
In International Standards, weight is equivalent to a force, expressed in Newton. However, in common
parlance (as used in terms defined in this document), the word “weight” continues to be used to mean
mass, although this practice is deprecated (see ISO 80000-4).
© ISO 2018 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 20475:2021
---------------------- Page: 12 ----------------------
SIST EN ISO 20475:2021
INTERNATIONAL STANDARD ISO 20475:2018(E)
Gas cylinders — Cylinder bundles — Periodic inspection
and testing
CAUTION — Some of the tests specified in this document involve the use of processes which
could lead to a hazardous situation.
1 Scope
This document specifies the requirements for the periodic inspection and testing of cylinder bundles
containing compressed, liquefied and dissolved gas.
NOTE Additional requirements for acetylene cylinder bundles are provided in Annex A.
This document also establishes general principles for the maintenance of cylinder bundles.
This document is not applicable to acetylene bundles with solvent-free acetylene cylinders.
This document excludes the requirements for cylinder bundles when they are a part of a battery vehicle.
For some specific applications, e.g. offshore, additional requirements can apply.
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 10286, Gas cylinders — Terminology
ISO 10460, Gas cylinders — Welded carbon-steel gas cylinders — Periodic inspection and testing
ISO 10462, Gas cylinders — Acetylene cylinders — Periodic inspection and maintenance
ISO 10961, Gas cylinders — Cylinder bundles — Design, manufacture, testing and inspection
ISO 11372, Gas cylinders — Acetylene cylinders — Filling conditions and filling inspection
ISO 11623, Gas cylinders — Composite construction — Periodic inspection and testing
ISO 14113, Gas welding equipment — Rubber and plastics hose and hose assemblies for use with industrial
gases up to 450 bar (45 MPa)
ISO 15996, Gas cylinders — Residual pressure valves — Specification and type testing of cylinder valves
incorporating residual pressure devices
1)
ISO 18119 , Gas cylinders — Seamless steel and seamless aluminium-alloy gas cylinders and tubes —
Periodic inspection and testing
ISO 22434, Transportable gas cylinders — Inspection and maintenance of cylinder valves
ISO 25760, Gas cylinders — Operational procedures for the safe removal of valves from gas cylinders
1) To be published.
© ISO 2018 – All rights reserved 1
---------------------- Page: 13 ----------------------
SIST EN ISO 20475:2021
ISO 20475:2018(E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 10286 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:/ / www .electropedia .org/
— ISO Online browsing platform: available at https:/ / www .iso .org/ obp
3.1
compressed gas
gas, which, when packaged under pressure for transport, is entirely gaseous at −50 °C
Note 1 to entry: This category includes all gases with a critical temperature less than or equal to −50 °C.
[SOURCE: ISO 10286:2015, 705]
3.2
liquefied gas
gas, which, when packaged under pressure, is partially liquid (or solid) at temperatures above −50 °C
Note 1 to entry: A distinction is made between:
— high pressure liquefied gas, a gas with a critical temperature between −50 °C and +65 °C;
— low pressure liquefied gas, a gas with a critical temperature above +65 °C.
[SOURCE: ISO 10286:2015, 706, modified — Note 1 to entry has been added.]
3.3
dissolved gas (under pressure)
gas, which when packaged under pressure for transport, is dissolved in a liquid phase solvent
[SOURCE: ISO 10286:2015, 709]
3.4
main valve
valve which is fitted to the manifold (3.11) of a bundle (3.5), isolating it from the main connection(s) (3.12)
[SOURCE: ISO 10286:2015, 267, modified — “battery vehicle/battery wagon/MEGC” has been deleted.]
3.5
bundle of cylinders
cylinder bundle
assembly of cylinders (3.7) that are fastened together and which are interconnected by a manifold
(3.11) 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
Note 1 to entry: In ISO/TC 58 standards, the term “bundle” is frequently used for simplification.
[SOURCE: ISO 10286:2015, 204]
3.6
frame
structural and non-structural members of a bundle (3.5) that combine all other components together,
while providing protection for the bundle's cylinders (3.7), valves and manifold (3.11) and which enable
the bundle to be transported
[SOURCE: ISO 10286:2015, 264]
2 © ISO 2018 – All rights reserved
---------------------- Page: 14 ----------------------
SIST EN ISO 20475:2021
ISO 20475:2018(E)
3.7
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.
[SOURCE: ISO 10286:2015, 201]
3.8
cylinder valve
valve that is fitted into a cylinder and to which a manifold (3.11) is connected in a bundle (3.5)
3.9
cylinder fitting
component with no gas shut-off capability that serves as a method for connecting a bundle's manifold
(3.11) to its individual cylinders when cylinder valves (3.8) are not fitted to the cylinders
3.10
fitting
connecting piece, of one or more parts having no shut-off function
3.11
manifold
piping system for connecting pressure receptacle(s) valves or cylinder fittings (3.9) to the main valve(s)
(3.4) or the main connection(s) (3.12)
[SOURCE: ISO 10286:2015, 265]
3.12
main connection
means of making a gas connection to a bundle (3.5)
[SOURCE: ISO 10286:2015, 266, modified — “battery vehicle/MEGC” has been deleted.]
3.13
tare
weight of the pressure receptacle when empty, including accessories fitted as presented
for filling
[SOURCE: ISO 10286:2015, 745]
3.14
maximum gross weight
...
SLOVENSKI STANDARD
oSIST prEN ISO 20475:2020
01-september-2020
Plinske jeklenke - Snopi jeklenk - Periodični pregledi in preskušanje (ISO
20475:2018)
Gas cylinders - Cylinder bundles - Periodic inspection and testing (ISO 20475:2018)
Gasflaschen - Flaschenbündel - Wiederkehrende Inspektion und Prüfung (ISO
20475:2018)
Bouteilles à gaz - Cadres de bouteilles - Contrôles et essais périodiques (ISO
20475:2018)
Ta slovenski standard je istoveten z: prEN ISO 20475
ICS:
23.020.35 Plinske jeklenke Gas cylinders
oSIST prEN ISO 20475:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 20475:2020
---------------------- Page: 2 ----------------------
oSIST prEN ISO 20475:2020
INTERNATIONAL ISO
STANDARD 20475
First edition
2018-02
Gas cylinders — Cylinder bundles —
Periodic inspection and testing
Bouteilles à gaz — Cadres de bouteilles — Contrôles et essais
périodiques
Reference number
ISO 20475:2018(E)
©
ISO 2018
---------------------- Page: 3 ----------------------
oSIST prEN ISO 20475:2020
ISO 20475:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 20475:2020
ISO 20475:2018(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Procedures for periodic inspections and tests . 4
4.1 General . 4
4.2 Periodic inspection and tests . 4
5 Inspections and tests. 5
5.1 General . 5
5.2 Identification of cylinders/bundles and preparation for inspections and tests. 5
5.3 Depressurization of manifold and individual cylinders . 5
5.4 Disassembly of the bundle . 6
5.5 Periodic inspection and testing of cylinders . 6
5.6 Inspection of the frame, manifold and valve condition . 6
5.6.1 General. 6
5.6.2 Frame . 6
5.6.3 Manifolds . 6
5.6.4 Valves and fittings . 6
5.7 Bundle reassembly and testing . 7
6 Stamp marking . 7
7 Documentation . 7
Annex A (normative) Additional requirements for the periodic inspection and testing of
acetylene bundles . 9
Bibliography .11
© ISO 2018 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 20475:2020
ISO 20475:2018(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 on 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 the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC 4,
Operational requirements for gas cylinders.
iv © ISO 2018 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 20475:2020
ISO 20475:2018(E)
Introduction
The principal aim of a periodic inspection and testing procedure is that, at the completion of the test,
the cylinder bundles may be reintroduced into service for a further period of time.
Periodic inspection and testing of cylinder bundles is carried out in conjunction with the retest period
of the cylinders within the bundle in order to comply with national and regional transport regulations.
If there are any doubts, inspectors should consult the bundle/cylinder's manufacturer so that the
manufacturer's current recommendations are taken into account.
This document is intended to be used under a variety of national regulatory regimes, but has been
[10]
written so that it is suitable for the application of the UN Model Regulations .
In International Standards, weight is equivalent to a force, expressed in Newton. However, in common
parlance (as used in terms defined in this document), the word “weight” continues to be used to mean
mass, although this practice is deprecated (see ISO 80000-4).
© ISO 2018 – All rights reserved v
---------------------- Page: 7 ----------------------
oSIST prEN ISO 20475:2020
---------------------- Page: 8 ----------------------
oSIST prEN ISO 20475:2020
INTERNATIONAL STANDARD ISO 20475:2018(E)
Gas cylinders — Cylinder bundles — Periodic inspection
and testing
CAUTION — Some of the tests specified in this document involve the use of processes which
could lead to a hazardous situation.
1 Scope
This document specifies the requirements for the periodic inspection and testing of cylinder bundles
containing compressed, liquefied and dissolved gas.
NOTE Additional requirements for acetylene cylinder bundles are provided in Annex A.
This document also establishes general principles for the maintenance of cylinder bundles.
This document is not applicable to acetylene bundles with solvent-free acetylene cylinders.
This document excludes the requirements for cylinder bundles when they are a part of a battery vehicle.
For some specific applications, e.g. offshore, additional requirements can apply.
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 10286, Gas cylinders — Terminology
ISO 10460, Gas cylinders — Welded carbon-steel gas cylinders — Periodic inspection and testing
ISO 10462, Gas cylinders — Acetylene cylinders — Periodic inspection and maintenance
ISO 10961, Gas cylinders — Cylinder bundles — Design, manufacture, testing and inspection
ISO 11372, Gas cylinders — Acetylene cylinders — Filling conditions and filling inspection
ISO 11623, Gas cylinders — Composite construction — Periodic inspection and testing
ISO 14113, Gas welding equipment — Rubber and plastics hose and hose assemblies for use with industrial
gases up to 450 bar (45 MPa)
ISO 15996, Gas cylinders — Residual pressure valves — Specification and type testing of cylinder valves
incorporating residual pressure devices
1)
ISO 18119 , Gas cylinders — Seamless steel and seamless aluminium-alloy gas cylinders and tubes —
Periodic inspection and testing
ISO 22434, Transportable gas cylinders — Inspection and maintenance of cylinder valves
ISO 25760, Gas cylinders — Operational procedures for the safe removal of valves from gas cylinders
1) To be published.
© ISO 2018 – All rights reserved 1
---------------------- Page: 9 ----------------------
oSIST prEN ISO 20475:2020
ISO 20475:2018(E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 10286 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:/ / www .electropedia .org/
— ISO Online browsing platform: available at https:/ / www .iso .org/ obp
3.1
compressed gas
gas, which, when packaged under pressure for transport, is entirely gaseous at −50 °C
Note 1 to entry: This category includes all gases with a critical temperature less than or equal to −50 °C.
[SOURCE: ISO 10286:2015, 705]
3.2
liquefied gas
gas, which, when packaged under pressure, is partially liquid (or solid) at temperatures above −50 °C
Note 1 to entry: A distinction is made between:
— high pressure liquefied gas, a gas with a critical temperature between −50 °C and +65 °C;
— low pressure liquefied gas, a gas with a critical temperature above +65 °C.
[SOURCE: ISO 10286:2015, 706, modified — Note 1 to entry has been added.]
3.3
dissolved gas (under pressure)
gas, which when packaged under pressure for transport, is dissolved in a liquid phase solvent
[SOURCE: ISO 10286:2015, 709]
3.4
main valve
valve which is fitted to the manifold (3.11) of a bundle (3.5), isolating it from the main connection(s) (3.12)
[SOURCE: ISO 10286:2015, 267, modified — “battery vehicle/battery wagon/MEGC” has been deleted.]
3.5
bundle of cylinders
cylinder bundle
assembly of cylinders (3.7) that are fastened together and which are interconnected by a manifold
(3.11) 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
Note 1 to entry: In ISO/TC 58 standards, the term “bundle” is frequently used for simplification.
[SOURCE: ISO 10286:2015, 204]
3.6
frame
structural and non-structural members of a bundle (3.5) that combine all other components together,
while providing protection for the bundle's cylinders (3.7), valves and manifold (3.11) and which enable
the bundle to be transported
[SOURCE: ISO 10286:2015, 264]
2 © ISO 2018 – All rights reserved
---------------------- Page: 10 ----------------------
oSIST prEN ISO 20475:2020
ISO 20475:2018(E)
3.7
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.
[SOURCE: ISO 10286:2015, 201]
3.8
cylinder valve
valve that is fitted into a cylinder and to which a manifold (3.11) is connected in a bundle (3.5)
3.9
cylinder fitting
component with no gas shut-off capability that serves as a method for connecting a bundle's manifold
(3.11) to its individual cylinders when cylinder valves (3.8) are not fitted to the cylinders
3.10
fitting
connecting piece, of one or more parts having no shut-off function
3.11
manifold
piping system for connecting pressure receptacle(s) valves or cylinder fittings (3.9) to the main valve(s)
(3.4) or the main connection(s) (3.12)
[SOURCE: ISO 10286:2015, 265]
3.12
main connection
means of making a gas connection to a bundle (3.5)
[SOURCE: ISO 10286:2015, 266, modified — “battery vehicle/MEGC” has been deleted.]
3.13
tare
weight of the pressure receptacle when empty, including accessories fitted as presented
for filling
[SOURCE: ISO 10286:2015, 745]
3.14
maximum gross weight
sum of the tare (3.13) of the bundle (3.5) and the maximum permissible filling weight
Note 1 to entry: To be understood as “maximum gross mass” as per regional transport regulations.
[SOURCE: ISO 10286:2015, 743, modified — Note 1 to entry has been added.]
3.15
test pressure
required pressure applied during a pressure test
3.16
working pressure
settled pressure of a compressed gas (3.1) at a uniform temperature of 288 °K (15 °C)
in a full bundle (3.5)
Note 1 to entry: In North America, service pressure is often used to indicate a similar condition, usually at
21,1 °C (70 F).
© ISO 2018 – All rights reserved 3
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oSIST prEN ISO 20475:2020
ISO 20475:2018(E)
Note 2 to entry: In East Asia, service pressure is often used to indicate a similar condition, usually at 35 °C.
[SOURCE: ISO 10286:2015, 736, modified — “gas cylinder” has been replaced by “bundle”.]
3.17
competent person
person who has acquired through training, qualifications or experience, or a combination of these, the
knowledge and skills enabling that person to perform a specified task
EXAMPLE The specified tasks can include periodic inspection, testing, welding, etc.
3.18
filling pressure
pressure to which a cylinder (3.7) is filled at the time of filling
Note 1 to entry: It varies according to the gas temperature in the cylinder, which is dependent on the charging
parameters and the ambient conditions. It is normally higher than the working pressure (3.16) (because of the
heat of compression) and always less than the test pressure (3.15).
[SOURCE: ISO 10286:2015, 734]
3.19
inspection body
independent inspection and testing body approved by the competent authority (3.20)
[SOURCE: ISO 10286:2015, 621]
3.20
competent authority
any body or authority designated or otherwise recognized as such for any purpose in each country by
its go
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