SIST EN ISO 23826:2022
(Main)Gas cylinders - Ball valves - Specification and testing (ISO 23826:2021)
Gas cylinders - Ball valves - Specification and testing (ISO 23826:2021)
This document specifies design, type testing, marking and manufacturing test and examination
requirements for ball valves used as:
a) closures of refillable transportable gas cylinders, pressure drums and tubes;
b) main valves for cylinder bundles;
c) valves for cargo transport units (e.g. trailers, battery vehicles and MEGCs);
which convey compressed gases, liquefied gases and dissolved gases.
NOTE 1 In the course of the document, the term "valve" is used with the meaning of "ball valve".
This document does not apply to:
• oxidizing gases as defined in ISO 10156,
• toxic gases (i.e. gases listed in ISO 10298 having an LC50 value ≤ 5 000 ppm) and
• acetylene for single gas cylinders, pressure drums and tubes.
NOTE 2 The reason for the exclusion of oxidizing gases is that the use of ball valves as closures of high
pressure cylinders for oxidizing gases is known to lead to specific ignition hazards that cannot reasonably be mitigated through the ball valve design or type testing. Safety hazards concern both the ball valve itself and any downstream equipment.
This International document does not apply to ball valves for liquefied petroleum gas (LPG),
cryogenic equipment, portable fire extinguishers and cylinders for breathing apparatus.
NOTE 3 Requirements for valves for cryogenic vessels are specified in ISO 21011 and at a regional level, e.g. in EN 1626. Requirements for valves for portable fire extinguishers at a regional level are specified e.g. in EN 3 series.
NOTE 4 Certain specific requirements for valves for breathing apparatus in addition to those that are
given in this document are specified at a regional level, e.g. in EN 144 series. Certain specific requirements for quick-release valves for fixed fire-fighting systems in addition to those that are given in this document are specified in ISO 16003 and at a regional level e.g. in EN 12094–4.
Gasflaschen - Kugelhähne - Spezifikation und Prüfungen (ISO 23826:2021)
Dieses Dokument legt Anforderungen an Auslegung, Baumusterprüfung, Kennzeichnung sowie Herstellungsprüfungen und -überprüfungen für Kugelhähne fest, die als:
a) Verschlüsse von wiederbefüllbaren ortsbewegliche Gasflaschen, Druckfässern und Großflaschen;
b) Hauptabsperrventile für Flaschenbündel;
c) Ventile für Güter-Transporteinheiten (z. B. Anhänger, Batterie-Fahrzeuge und MEGCs [en: multi-element gas containers]);
für verdichtete Gase, verflüssigte Gase und gelöste Gase verwendet werden.
ANMERKUNG 1 Im Laufe des Dokuments wird der Begriff „Ventil“ in der Bedeutung von „Kugelhahn“ verwendet.
Dieses Dokument gilt nicht für Kugelhähne für:
- oxidierende Gase wie in ISO 10156 festgelegt;
- giftige Gase (d. h. in ISO 10298 aufgeführte Gase mit einem LC50 Wert ≤ 5 000 ppm und
- Acetylen für Einzel-Gasflaschen, Druckfässer und Großflaschen.
ANMERKUNG 2 Der Grund für den Ausschluss oxidierender Gase liegt darin, dass die Verwendung von Kugelhähnen als Verschlüsse von Hochdruckflaschen für oxidierende Gase bekanntermaßen zu spezifischen Zündgefährdungen führt, die durch die Kugelhahnauslegung oder die Baumusterprüfung nicht angemessen gemindert werden können. Gefährdungen betreffen sowohl den Kugelhahn selbst als auch die nachgeschaltete Ausrüstung.
ANMERKUNG 3 Der Grund für den Ausschluss von Acetylen für Einzel-Gasflaschen, Druckfässer und Großflaschen liegt darin, dass das Risiko eines Acetylenzerfalls durch die Kugelhahnauslegung oder die Baumusterprüfung nicht angemessen gemindert werden kann.
Dieses Dokument gilt nicht für Kugelhähne für Flüssiggas (LPG, en: liquefied petroleum gas), Kryo-Ausrüstung, tragbare Feuerlöscher und Flaschen für Atemschutzgeräte.
ANMERKUNG 4 Anforderungen an Ventile für Kryo-Behälter sind in ISO 21011 festgelegt.
ANMERKUNG 5 Bestimmte spezifische Anforderungen an Schnellöffnungsventile für ortsfeste Brandbekämpfungsanlagen, zusätzlich zu den in diesem Dokument angegebenen, sind in ISO 16003 festgelegt.
Bouteilles à gaz - Robinets à boisseau sphérique - Spécifications et essais (ISO 23826:2021)
Le présent document spécifie les exigences relatives à la conception, aux essais de type, au marquage et aux essais et contrôles du fabricant pour les robinets à boisseau sphérique utilisées comme:
fermeture de bouteilles à gaz, tubes et fûts à pression transportables rechargeables;
robinet principal de cadre de bouteilles;
robinet d’unité de transport de cargaison [par exemple des remorques, véhicules-batteries et conteneurs à gaz à éléments multiples (CGEM)];
contenant des gaz comprimés, des gaz liquéfiés et des gaz dissouts.
NOTE 1 Dans ce document, le terme «robinet» a le sens de «robinet à boisseau sphérique».
En revanche, le présent document ne s’applique pas aux robinets à boisseau sphérique utilisés pour:
des gaz oxydants, tels que définis dans l’ISO 10156;
des gaz toxiques (c’est-à-dire répertoriés dans l’ISO 10298 comme ayant une LC50 ≤ 5 000 ppm;
de l’acétylène dans des bouteilles à gaz individuelles, des tubes et des fûts à pression.
NOTE 2 Les gaz oxydants sont exclus car l’utilisation de robinets à boisseau sphérique comme fermeture de bouteilles à gaz oxydant sous haute pression est connue pour engendrer des risques d’inflammation particuliers qui ne peuvent être raisonnablement réduits par la conception ni les essais de type des robinets à boisseau sphérique. Les dangers portent à la fois sur le robinet à boisseau sphérique lui-même, ainsi que sur tout l’équipement aval.
NOTE 3 L’acétylène dans des bouteilles à gaz individuelles, des tubes et des fûts à pression est exclu car le risque d’une décomposition de l’acétylène ne peut raisonnablement être réduit par la conception ni les essais de type des robinets à boisseau sphérique.
Le présent document ne s’applique pas aux robinets à boisseau sphérique pour gaz de pétrole liquéfié (GPL), équipement cryogénique, extincteurs portables et bouteilles de respirateur.
NOTE 4 Les exigences relatives aux robinets pour récipients cryogéniques sont indiquées dans l’ISO 21011.
NOTE 5 Certaines exigences particulières applicables aux robinets à ouverture rapide pour les systèmes fixes de lutte contre l’incendie additionnelles à celles indiquées dans le présent document sont précisées dans l’ISO 16003.
Plinske jeklenke - Krogelne pipe - Specifikacija in preskušanje (ISO 23826:2021)
Ta dokument določa zahteve za projektiranje, tipsko preskušanje, označevanje in proizvodne preskuse ter pregledovanje za krogelne pipe, ki se uporabljajo kot:
a) zapirala prenosnih ponovno polnljivih plinskih jeklenk, tlačnih valjev in cevi;
b) glavni ventili za sklope jeklenk;
c) ventili za enote za prevoz tovora (npr. priklopniki, baterijska vozila, plinski vsebniki iz več elementov (MEGC));
za prenašanje stisnjenih, utekočinjenih in raztopljenih plinov.
OPOMBA 1: Izraz »ventil« se v tem dokumentu uporablja s pomenom »krogelna pipa«.
Ta dokument se ne uporablja za:
• oksidativne pline, kot je opredeljeno v standardu ISO 10156;
• strupene pline (tj. pline, navedene v standardu ISO 10298 z vrednostjo LC50 ≤ 5000 ppm); in
• acetilen za posamezne plinske jeklenke, tlačne valje in cevi.
OPOMBA 2: Razlog za izključitev oksidativnih plinov je ta, da uporaba krogelnih pip kot zapiral visokotlačnih
jeklenk za oksidacijske pline povzroča specifične nevarnosti vžiga, ki jih ni mogoče razumno zmanjšati s projektiranjem ali tipskim preskušanjem krogelnih pip. Dejavniki tveganja se navezujejo tako na krogelno pipo kot tudi vso navzdolnjo opremo.
Ta mednarodni dokument se ne uporablja za krogelne pipe za utekočinjeni naftni plin (LPG), kriogeno opremo, prenosne gasilnike in jeklenke dihalnih aparatov.
OPOMBA 3: Zahteve za ventile za kriogenske posode so določene v standardu ISO 21011 in na regionalni ravni, npr. v standardu EN 1626. Zahteve za ventile za prenosne gasilnike na regionalni ravni so določene npr. v skupini standardov EN 3.
OPOMBA 4: Določene posebne zahteve za ventile za dihalne aparate so, poleg zahtev v tem dokumentu, določene na regionalni ravni, npr. v skupini standardov EN 144. Določene posebne zahteve za ventile za hitro sprostitev za fiksne sisteme za gašenje požarov so, poleg zahtev v tem dokumentu, določene v standardu ISO 16003 in na regionalni ravni npr. v standardu EN 12094–4.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 23826:2022
01-januar-2022
Plinske jeklenke - Krogelne pipe - Specifikacija in preskušanje (ISO 23826:2021)
Gas cylinders - Ball valves - Specification and testing (ISO 23826:2021)
Gasflaschen - Kugelhähne - Spezifikation und Prüfungen (ISO 23826:2021)
Bouteilles à gaz - Robinets à boisseau sphérique - Spécifications et essais (ISO
23826:2021)
Ta slovenski standard je istoveten z: EN ISO 23826:2021
ICS:
23.020.35 Plinske jeklenke Gas cylinders
23.060.20 Zapirni ventili (kroglasti in Ball and plug valves
pipe)
SIST EN ISO 23826:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 23826:2022
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SIST EN ISO 23826:2022
EN ISO 23826
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2021
EUROPÄISCHE NORM
ICS 23.020.35
English Version
Gas cylinders - Ball valves - Specification and testing (ISO
23826:2021)
Bouteilles à gaz - Robinets à boisseau sphérique - Gasflaschen - Kugelhähne - Spezifikation und
Spécifications et essais (ISO 23826:2021) Prüfungen (ISO 23826:2021)
This European Standard was approved by CEN on 21 October 2021.
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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 23826:2021 E
worldwide for CEN national Members.
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SIST EN ISO 23826:2022
EN ISO 23826:2021 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 23826:2022
EN ISO 23826:2021 (E)
European foreword
This document (EN ISO 23826:2021) has been prepared by Technical Committee ISO/TC 58 "Gas
cylinders" in collaboration with 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 April 2022, and conflicting national standards shall be
withdrawn at the latest by April 2022.
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.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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 23826:2021 has been approved by CEN as EN ISO 23826:2021 without any modification.
3
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SIST EN ISO 23826:2022
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SIST EN ISO 23826:2022
INTERNATIONAL ISO
STANDARD 23826
First edition
2021-10
Gas cylinders — Ball valves —
Specification and testing
Bouteilles à gaz — Robinets à boisseau sphérique — Spécifications et
essais
Reference number
ISO 23826:2021(E)
© ISO 2021
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SIST EN ISO 23826:2022
ISO 23826:2021(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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SIST EN ISO 23826:2022
ISO 23826:2021(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Valve description . 4
5 Valve design requirements . 7
5.1 General . 7
5.2 Materials . 7
5.3 Valve connections . 8
5.4 Mechanical strength . 8
5.4.1 Resistance to hydraulic burst pressure . 8
5.4.2 Resistance to mechanical impact . 9
5.5 Valve operating mechanism. 9
5.6 Valve operating device. 10
5.7 Leakage . 10
5.8 Securing arrangements . 10
5.9 Manufacturing tests and examinations . 11
6 Type testing .11
6.1 General . 11
6.2 Documentation . 13
6.3 Test samples . 13
6.4 Test report . 14
6.5 Test temperatures . 14
6.6 Test pressures . 14
6.6.1 Valve burst test pressure . 14
6.6.2 Valve test pressure . 14
6.7 Test gases. 14
6.7.1 Gas quality . 14
6.7.2 Leak tightness tests .15
6.7.3 Endurance tests . 15
6.8 Test schedule . 15
6.9 Hydraulic burst pressure test . 16
6.10 Flame impingement test . 16
6.11 Excessive torque test . 16
6.12 Leak tightness test . 17
6.12.1 General . 17
6.12.2 Internal leak tightness test . 17
6.12.3 External leak tightness test . 18
6.13 Endurance test . 19
6.14 Visual examination . 19
7 Marking . .19
8 Operating instructions .20
Annex A (normative) Endurance test machine .21
Bibliography .23
iii
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SIST EN ISO 23826:2022
ISO 23826:2021(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, Subcommittee SC 2,
Cylinder fittings, 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).
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.
iv
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SIST EN ISO 23826:2022
ISO 23826:2021(E)
Introduction
[29]
This document covers the function of a ball valve as a closure (defined by the UN Model Regulations ).
It is possible that additional features of ball valves (e.g. pressure regulators, residual pressure devices,
non-return devices, pressure relief devices) are covered by other standards or regulations.
Ball valves conforming to this document can be expected to perform satisfactorily under normal
service conditions.
This document pays particular attention to:
a) safety (mechanical strength, impact strength, endurance, leak tightness, resistance to acetylene
decomposition);
b) suitability of materials;
c) testing;
d) marking.
[29]
This document has been written so that it is suitable to be referenced in the UN Model Regulations .
In this document the unit bar is used, due to its universal use in the field of technical gases. It should,
however, be noted that bar is not an SI unit, and that the corresponding SI unit for pressure is Pa
5 5 2
(1 bar = 10 Pa = 10 N/m ).
Pressure values given in this document are given as gauge pressure (pressure exceeding atmospheric
pressure) unless noted otherwise.
Tests and examinations performed to demonstrate conformity to this document shall be conducted
using instruments calibrated before being put into service and thereafter according to an established
programme.
Any tolerances given in this document include measurement uncertainties.
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SIST EN ISO 23826:2022
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SIST EN ISO 23826:2022
INTERNATIONAL STANDARD ISO 23826:2021(E)
Gas cylinders — Ball valves — Specification and testing
1 Scope
This document specifies design, type testing, marking, manufacturing tests and examinations
requirements for ball valves used as:
a) closures of refillable transportable gas cylinders, pressure drums and tubes;
b) main valves for cylinder bundles;
c) valves for cargo transport units [e.g. trailers, battery vehicles, multi-element gas containers
(MEGCs)];
which convey compressed gases, liquefied gases and dissolved gases.
NOTE 1 In this document, the term “valve” is used with the meaning of “ball valve”.
This document does not apply to ball valves for:
— oxidizing gases as defined in ISO 10156;
1)
— toxic gases (i.e. gases listed in ISO 10298 having an LC value ≤ 5 000 ppm );
50
— acetylene for single gas cylinders, pressure drums and tubes.
NOTE 2 The reason for the exclusion of oxidizing gases is that the use of ball valves as closures of high-
pressure cylinders for oxidizing gases is known to lead to specific ignition hazards that cannot reasonably be
mitigated through the ball valve design or type testing. Safety hazards concern both the ball valve itself and any
downstream equipment.
NOTE 3 The reason for the exclusion of acetylene for single gas cylinders, pressure drums and tubes is that the
risk of an acetylene decomposition cannot reasonably be mitigated through the ball valve design or type testing.
This document does not apply to ball valves for liquefied petroleum gas (LPG), cryogenic equipment,
portable fire extinguishers and cylinders for breathing apparatus.
NOTE 4 Requirements for valves for cryogenic vessels are specified in ISO 21011.
NOTE 5 Certain specific requirements for quick-release valves for fixed fire-fighting systems in addition to
those that are given in this document are specified in ISO 16003.
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 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method
ISO 10286, Gas cylinders — Vocabulary
ISO 10524-3, Pressure regulators for use with medical gases — Part 3: Pressure regulators integrated with
cylinder valves (VIPRs)
1) ppm = parts per million.
1
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SIST EN ISO 23826:2022
ISO 23826:2021(E)
ISO 11114-1, Gas cylinders — Compatibility of cylinder and valve materials with gas contents — Part 1:
Metallic materials
ISO 11114-2, Gas cylinders — Compatibility of cylinder and valve materials with gas contents — Part 2:
Non-metallic materials
ISO 14246, Gas cylinders — Cylinder valves — Manufacturing tests and examinations
ISO 15615:2013, Gas welding equipment — Acetylene manifold systems for welding, cutting and allied
processes — Safety requirements in high-pressure devices
ISO 22435, Gas cylinders — Cylinder valves with integrated pressure regulators — Specification and type
testing
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:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
ball valve
valve which uses the rotation of a ball with a through-passage to allow or shut-off flow through it
Note 1 to entry: Ball valves can have multiple ports.
3.2
main valve
valve which is fitted to the manifold of a bundle, battery vehicle, battery wagon or MEGC isolating it
from the main connection(s)
2)
[SOURCE: ISO 10286:— , 3.1.5.4]
3.3
valve operating mechanism
mechanism which rotates the ball and which includes the external sealing systems and
can include the internal sealing systems
3.4
valve operating device
component which actuates the valve operating mechanism (3.3)
EXAMPLE Handle/lever, handwheel/knob, key or actuator.
[SOURCE: ISO 10297:2014, 3.3, modified — The example has been changed.]
3.5
stop mechanism
system which limits the position of the valve operating mechanism (3.3)
EXAMPLE Stop pin and stop plate, mechanical stop in valve body and counterpart in handle/lever.
2) Under preparation. Stage at the time of publication: ISO/FDIS 10286:2021.
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SIST EN ISO 23826:2022
ISO 23826:2021(E)
3.6
external leak tightness
leak tightness to atmosphere (leakage in and/or leakage out) when the valve is open
[SOURCE: ISO 10297:2014, 3.4, modified — Note 1 to entry has been deleted.]
3.7
internal leak tightness
leak tightness across the seat (leakage in and/or leakage out) when the valve is closed
[SOURCE: ISO 10297:2014, 3.5, modified — Note 1 to entry has been deleted.]
3.8
valve working pressure
p
w
settled pressure of a compressed gas at a uniform reference temperature of 15 °C in a full pressure
receptacle for which the valve is intended
Note 1 to entry: This definition does not apply to liquefied gases (e.g. carbon dioxide), or dissolved gases (e.g.
acetylene).
[SOURCE: ISO 10297:2014, 3.6, modified — “pressure receptacle” has replaced “gas cylinder or cylinder
bundle” and Note 2 to entry has been deleted.]
3.9
valve burst test pressure
p
vbt
minimum pressure applied to a valve during hydraulic burst pressure test
[SOURCE: ISO 10297:2014, 3.7, modified — Note 1 to entry has been deleted.]
3.10
valve test pressure
p
vt
minimum pressure applied to a valve during testing
[SOURCE: ISO 10297:2014, 3.8, modified — Note 1 to entry has been deleted.]
3.11
lowest operating pressure
lowest settled pressure of the gas(es) for which the ball valve (3.1) is designed
3.12
endurance torque
T
e
torque used during the endurance test
Note 1 to entry: The endurance torque is expressed in Nm.
[SOURCE: ISO 10297:2014, 3.11, modified — “torque used” has replaced “closing torque applied”.]
3.13
over torque
T
o
torque applied to the valve operating device (3.4) in opening and closing direction which the valve
operating mechanism (3.3) and/or stop mechanism (3.5) can tolerate and remain operable
Note 1 to entry: The over torque is expressed in Nm.
[SOURCE: ISO 10297:2014, 3.12, modified — “torque” has replaced “opening or closing torque (whichever
is the lower value)”, “in opening and closing direction” has replaced “to determine the level of torque”
and “and/or stop mechanism” has been added.]
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SIST EN ISO 23826:2022
ISO 23826:2021(E)
3.14
failure torque
T
f
opening or closing torque (whichever is the lower value) applied to the valve operating device (3.4) at
which mechanical failure occurs
Note 1 to entry: The failure torque is expressed in Nm.
[SOURCE: ISO 10297:2014, 3.13, modified — “at which mechanical failure occurs” has replaced “to
obtain mechanical failure of the valve operating mechanism and/or valve operating device”.]
3.15
valve inlet connection
connection on the valve which connects the valve to the pressure receptacle
[SOURCE: ISO 10297:2014, 3.16, modified — “pressure receptacle” has replaced “cylinder(s)”.]
3.16
valve outlet connection
connection on the valve used to discharge the pressure receptacle
Note 1 to entry: For most valves, this connection is also used for filling.
[SOURCE: ISO 10297:2014, 3.17, modified — “pressure receptacle” has replaced “cylinder(s)”.]
3.17
valve filling connection
connection on the valve used to fill the pressure receptacle
Note 1 to entry: The valve filling connection can be different from the valve outlet connection (3.16).
[SOURCE: ISO 10297:2014, 3.18, modified — “pressure receptacle” has replaced “cylinder(s)”.]
4 Valve description
4.1 A ball valve (see Figure 1) typically comprises:
a) valve body;
b) valve operating mechanism;
c) valve operating device;
d) stop mechanism;
e) means to ensure internal leak tightness;
f) means to ensure external leak tightness;
g) valve outlet connection(s);
h) valve inlet connection.
4
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SIST EN ISO 23826:2022
ISO 23826:2021(E)
Key
1 stop pin 6 stem sealing
2 valve body 7 seat
3 valve connection (inlet/outlet) 8 ball
4 handle/lever 9 stop plate
5 stem
NOTE Stop plate and handle/lever can be combined in one component.
Figure 1 — Example of a ball valve design
4.2 Ball valves can also include:
a) pressure-relief device;
NOTE 1 The relevant transport regulation can require or forbid pressure relief devices for some gases,
gas mixtures or gas groups. Additional requirements for pressure-relief devices can exist in international/
regional regulations/standards.
b) dip tube;
c) connection plug/cap;
5
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SIST EN ISO 23826:2022
ISO 23826:2021(E)
d) excess flow device;
e) non-return valve on the valve filling connection;
f) residual pressure device with or without non-return function;
NOTE 2 Requirements for residual pressure devices are given in ISO 15996.
g) pressure regulating device;
NOTE 3 Requirements for pressure regulating devices are given in ISO 22435 for industrial applications
and in ISO 10524-3 for medical applications.
h) separate valve filling connection;
i) flow restricting orifice;
j) filter(s).
Not all of these components have test requirements detailed in this document.
4.3 There are typically two ball valve types:
a) floating ball type (see Figure 2);
b) trunnion type (see Figure 3).
The valve designs shown in Figures 2 and 3 are given as typical examples only.
Figure 2 — Floating ball type design
6
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SIST EN ISO 23826:2022
ISO 23826:2021(E)
Figure 3 — Trunnion type design
5 Valve design requirements
5.1 General
Valves shall operate within specification and be leak tight over a range of service temperatures, from at
least −20 °C to +65 °C in indoor and outdoor environments.
When fitted, closed valves shall be internally leak tight during transport and storage (see test 6 in
Table 3) for temperatures down to −40 °C.
Additional testing at higher or lower service temperatures is contingent on specific agreements
between the manufacturer and
...
SLOVENSKI STANDARD
oSIST prEN ISO 23826:2021
01-marec-2021
Plinske jeklenke - Krogelni ventili - Specifikacija in preskušanje (ISO/DIS
23826:2021)
Gas cylinders - Ball valves - Specification and testing (ISO/DIS 23826:2021)
Gasflaschen - Kugelhähne - Spezifikation und Prüfungen (ISO/DIS 23826:2021)
Ta slovenski standard je istoveten z: prEN ISO 23826
ICS:
23.020.35 Plinske jeklenke Gas cylinders
23.060.20 Zapirni ventili (kroglasti in Ball and plug valves
pipe)
oSIST prEN ISO 23826:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 23826:2021
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oSIST prEN ISO 23826:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 23826
ISO/TC 58/SC 2 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2021-01-14 2021-04-08
Gas cylinders — Ball valves — Specification and testing
ICS: 23.020.35
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 23826:2021(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2021
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oSIST prEN ISO 23826:2021
ISO/DIS 23826:2021(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
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
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oSIST prEN ISO 23826:2021
ISO/DIS 23826:2021(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Valve description . 4
5 Valve design requirements . 6
5.1 General . 6
5.2 Materials . 7
5.3 Valve connections . 7
5.4 Mechanical strength . 8
5.4.1 Resistance to hydraulic burst pressure . 8
5.4.2 Resistance to mechanical impact . 8
5.5 Valve operating mechanism . 8
5.6 Valve operating device . 9
5.7 Leakage . 9
5.8 Securing arrangements . 9
5.9 Manufacturing tests and examinations .10
6 Type testing.10
6.1 General .10
6.2 Documentation .12
6.3 Test samples .12
6.4 Test report .13
6.5 Test temperatures .13
6.6 Test pressures .13
6.6.1 Valve burst test pressure .13
6.6.2 Valve test pressure .13
6.7 Test gases .13
6.7.1 Gas quality .13
6.7.2 Leak tightness tests .14
6.7.3 Endurance tests .14
6.8 Test schedule .14
6.9 Hydraulic burst pressure test .15
6.10 Flame impingement test .15
6.11 Excessive torque test .15
6.12 Leak tightness test .16
6.12.1 General.16
6.12.2 Internal leak tightness test . .16
6.12.3 External leak tightness test.17
6.13 Endurance test .17
6.14 Visual examination .18
7 Marking .18
8 Operating instructions .19
Annex A (normative) Manufacturing tests and examinations .20
Annex B (normative) Endurance test machine .21
Bibliography .23
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oSIST prEN ISO 23826:2021
ISO/DIS 23826:2021(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, Subcommittee SC 2,
Cylinder fittings.
This is the first edition.
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.
iv © ISO 2021 – All rights reserved
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oSIST prEN ISO 23826:2021
ISO/DIS 23826:2021(E)
Introduction
This document covers the function of a ball valve as a closure (defined by the UN Model Regulations).
Additional features of ball valves (e.g. pressure regulators, residual pressure devices, non-return
devices and pressure relief devices) might be covered by other standards and/or regulations.
Ball valves complying with this document can be expected to perform satisfactorily under normal
service conditions.
This document pays particular attention to:
a) safety (mechanical strength, impact strength, endurance, leak tightness, resistance to acetylene
decomposition);
b) suitability of materials;
c) testing;
d) marking.
This document has been written so that it is suitable to be referenced on the UN Model Regulations
[1]. In this document the unit bar is used, due to its universal use in the field of technical gases. It
should, however, be noted that bar is not an SI unit, and that the corresponding SI unit for pressure is Pa
5 5 2
(1 bar = 10 Pa = 10 N/m ).
Pressure values given in this document are given as gauge pressure (pressure exceeding atmospheric
pressure) unless noted otherwise.
Any tolerances given in this document include measurement uncertainties.
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oSIST prEN ISO 23826:2021
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oSIST prEN ISO 23826:2021
DRAFT INTERNATIONAL STANDARD ISO/DIS 23826:2021(E)
Gas cylinders — Ball valves — Specification and testing
1 Scope
This document specifies design, type testing, marking and manufacturing test and examination
requirements for ball valves used as:
a) closures of refillable transportable gas cylinders, pressure drums and tubes;
b) main valves for cylinder bundles;
c) valves for cargo transport units (e.g. trailers, battery vehicles and MEGCs);
which convey compressed gases, liquefied gases and dissolved gases.
NOTE 1 In the course of the document, the term “valve” is used with the meaning of “ball valve”.
This document does not apply to ball valves for:
• oxidizing gases as defined in ISO 10156,
• toxic gases (i.e. gases listed in ISO 10298 having an LC value ≤ 5 000 ppm) and
50
• acetylene for single gas cylinders, pressure drums and tubes.
NOTE 2 The reason for the exclusion of oxidizing gases is that the use of ball valves as closures of high
pressure cylinders for oxidizing gases is known to lead to specific ignition hazards that cannot reasonably be
mitigated through the ball valve design or type testing. Safety hazards concern both the ball valve itself and any
downstream equipment.
NOTE 3 The reason for the exclusion of acetylene for single gas cylinders, pressure drums and tubes is that the
risk of an acetylene decomposition cannot reasonably be mitigated through the ball valve design or type testing.
This document does not apply to ball valves for liquefied petroleum gas (LPG), cryogenic equipment,
portable fire extinguishers and cylinders for breathing apparatus.
NOTE 4 Requirements for valves for cryogenic vessels are specified in ISO 21011 and at a regional level,
e.g. in EN 1626. Requirements for valves for portable fire extinguishers at a regional level are specified e.g. in
EN 3 series.
NOTE 5 Certain specific requirements for quick-release valves for fixed fire-fighting systems in addition to
those that are given in this document are specified in ISO 16003 and at a regional level e.g. in EN 12094–4.
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 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method
ISO 10156, Gas cylinders — Gases and gas mixtures — Determination of fire potential and oxidizing ability
for the selection of cylinder valve outlets
ISO 10286, Gas cylinders — Terminology
ISO 10298, Gas cylinders — Gases and gas mixtures — Determination of toxicity for the selection of cylinder
valve outlets
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oSIST prEN ISO 23826:2021
ISO/DIS 23826:2021(E)
ISO 10524-3, Pressure regulators for use with medical gases — Part 3: Pressure regulators integrated with
cylinder valves (VIPRs)
ISO 11114-1, Gas cylinders — Compatibility of cylinder and valve materials with gas contents — Part 1:
Metallic materials
ISO 11114-2, Gas cylinders — Compatibility of cylinder and valve materials with gas contents — Part 2:
Non-metallic materials
ISO 14246, Gas cylinders — Cylinder valves — Manufacturing tests and examinations
ISO 15615:2013, Gas welding equipment — Acetylene manifold systems for welding, cutting and allied
processes — Safety requirements in high-pressure devices
ISO 22435, Gas cylinders — Cylinder valves with integrated pressure regulators — Specification and
type testing
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:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
ball valve
valve which uses the rotation of a ball with a through-passage to allow or shut-off flow through it
Note 1 to entry: Ball valves can have multiple ports.
3.2
main valve
valve which is fitted to a cylinder bundle’s manifold isolating it from the main connection(s)
3.3
valve operating mechanism
mechanism which rotates the ball and which includes external sealing systems and can
include the internal sealing systems
3.4
valve operating device
component which actuates the valve operating mechanism (3.3)
Note 1 to entry: Examples are handle/lever, handwheel/knob, key or actuator.
3.5
stop mechanism
system which limits the position of the valve operating mechanism (3.3)
Note 1 to entry: Examples are stop pin and stop plate, mechanical stop in valve body and counterpart in
handle/lever.
3.6
external leak tightness
leak tightness to atmosphere (leakage in and/or leakage out) when the valve is open
3.7
internal leak tightness
leak tightness across the seat (leakage in and/or leakage out) when the valve is closed
2 © ISO 2021 – All rights reserved
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oSIST prEN ISO 23826:2021
ISO/DIS 23826:2021(E)
3.8
valve working pressure
p
w
settled pressure of a compressed gas at a uniform reference temperature of 15 °C in a full pressure
receptacle for which the valve is intended
Note 1 to entry: This definition does not apply to liquefied gases (e.g. carbon dioxide), or dissolved gases (e.g.
acetylene).
Note 2 to entry: The valve working pressure is expressed in bar.
3.9
valve burst test pressure
p
vbt
minimum pressure applied to a valve during hydraulic burst pressure test
Note 1 to entry: The valve burst test pressure is expressed in bar.
3.10
valve test pressure
p
vt
minimum pressure applied to a valve during testing
Note 1 to entry: The valve test pressure is expressed in bar.
3.11
lowest operating pressure
lowest settled pressure of the gas(es) for which the ball valve is designed
3.12
endurance torque
T
e
torque used during the endurance test
Note 1 to entry: The endurance torque is expressed in Nm.
3.13
over torque
T
o
torque applied to the valve operating device (3.4) in opening and closing direction which the valve
operating mechanism (3.3) and/or stop mechanism (3.5) can tolerate and remain operable
Note 1 to entry: The over torque is expressed in Nm.
3.14
failure torque
T
f
opening or closing torque (whichever is the lower value) applied to the valve operating device (3.4) at
which mechanical failure occurs
Note 1 to entry: The failure torque is expressed in Nm.
3.15
valve inlet connection
connection on the valve which connects the valve to the pressure receptacle
3.16
valve outlet connection
connection on the valve used to discharge the pressure receptacle
Note 1 to entry: For most valves this connection is also used for filling.
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oSIST prEN ISO 23826:2021
ISO/DIS 23826:2021(E)
3.17
valve filling connection
connection on the valve used to fill the pressure receptacle
Note 1 to entry: The valve filling connection can be different from the valve outlet connection.
3.18
NTP
normal temperature and pressure [20,0 °C (293,15 K), 1,013 bar absolute (0,101 3 MPa absolute)]
4 Valve description
4.1 A ball valve (see Figure 1) typically comprises of:
a) valve body;
b) valve operating mechanism;
c) valve operating device;
d) stop mechanism;
e) means to ensure internal leak tightness;
f) means to ensure external leak tightness;
g) valve outlet connection(s);
h) valve inlet connection.
4.2 Ball valves can also include:
a) pressure-relief device;
NOTE 1 The relevant transport regulation can require or forbid pressure relief devices for some gases,
gas mixtures or gas groups. Additional requirements for pressure-relief devices can exist in international/
regional regulations/standards.
b) dip tube;
c) connection plug/cap;
d) excess flow device;
e) non-return valve on the valve filling connection;
f) residual pressure device with or without non-return function;
NOTE 2 Requirements for residual pressure devices are given in ISO 15996.
g) pressure regulating device;
NOTE 3 Requirements for pressure regulating devices are given in ISO 22435 for industrial applications
and in ISO 10524-3 for medical applications.
h) separate valve filling connection;
i) flow restricting orifice;
j) filter(s).
Not all of these components have test requirements detailed in this document.
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oSIST prEN ISO 23826:2021
ISO/DIS 23826:2021(E)
4.3 There are typically two ball valve types:
a) floating ball type (see Figure 2);
b) trunnion type (see Figure 3).
The valve designs shown in Figures 2 and 3 are given as typical examples only.
Key
1 stop pin
2 valve body
3 valve connection (inlet/outlet)
4 handle/lever
5 stem
6 stem sealing
7 seat
8 ball
9 stop plate
NOTE Stop plate and handle/lever can be combined in one component.
Figure 1 — Example of a ball valve design
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oSIST prEN ISO 23826:2021
ISO/DIS 23826:2021(E)
Figure 2 — Floating ball type design
Figure 3 — Trunnion type design
5 Valve design requirements
5.1 General
Valves shall operate within specification and be leak tight over a range of service temperatures, from at
least −20 °C to +65 °C in indoor and outdoor environments.
Closed valves shall be internally leak tight during transport and storage (see test 6 in Table 3) for
temperatures down to −40 °C.
Where higher or lower service temperatures are required, any additional requirements and tests shall
be agreed between the manufacturer and purchaser.
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oSIST prEN ISO 23826:2021
ISO/DIS 23826:2021(E)
For ball valves used in liquefied gas service, a cavity relief system (e.g. a vent through the ball) is
required to prevent trapping of the gas within the ball cavity in the closed condition.
For ball valves with multiple ports, the relevant requirements according to Clause 5 shall be fulfilled for
each port.
For ball valves where anti-static and fire safe behaviour is of importance, examples of respective
requirements are given in Annex B of EN 12266-2 and in ISO 10497.
5.2 Materials
Metallic and non-metallic materials in contact with the gas shall be chemically and physically compatible
with the gas, according to ISO 11114-1 and ISO 11114-2 under all intended operating conditions. For
all valves, the compatibility of the lubricant(s) and glue(s), if used in gas wetted areas, shall also be
considered. For valves used for dissolved gases, the compatibility of the materials in contact with the
solvent shall also be considered. For valves used with gas mixtures, the compatibility of the gas wetted
materials with each component of the gas mixture shall be considered.
When using plated or coated components in gas wetted areas the material compatibility of both
the plating/coating material and the substrate material shall be taken into account. In addition,
consideration should be given to avoid separation of the surface coating or particle generation.
The material used for the valve body shall be either
a) a material not showing a ductile to brittle transition (examples of allowed materials are copper
alloys, austenitic stainless steels, aluminium alloys and nickel alloys), or
b) a ferritic material (e.g. carbon steel) having an impact value greater than 27 J at −40 °C when
submitted to the Charpy pendulum impact test as specified in ISO 148-1.
5.3 Valve connections
Valve inlet and outlet connections shall conform to an International Standard, other regional or national
standards or proprietary designs that have been qualified to an acceptable industry standard.
NOTE 1 Valve inlet connection standards are for example ISO 11363-1, ISO 15245-1, ISO 228, ISO 6162-1,
ISO 6162-2, ISO 11926-1 and ANSI/ASME B1.20.1.
NOTE 2 International valve outlet connection standards are for example ISO 5145, ISO 10692-1, ISO 228–1,
ISO 6162-1, ISO 6162-2, ISO 11926-1 and ANSI/ASME B1.20.1. A partial compilation of regional and national
standards is given in ISO/TR 7470.
NOTE 3 Qualification procedures for proprietary valve inlet connection designs are for example given in
ISO 10692-2.
NOTE 4 Qualification procedures for proprietary valve outlet connection designs are for example given in
CGA V-1.
If the valve filling connection is separate to the valve outlet connection and not equipped with a closure
device (non-return valve or isolating valve), it shall be provided with a pressure-tight device (e.g. a plug
or cap which can be operated or removed only by the use of a special proprietary tool provided by
the manufacturer). Where applicable, such a pressure-tight device shall be designed to vent gas before
becoming disengaged.
The valve filling connection closure device, if fitted, shall comply with the relevant endurance and
subsequent leakage requirements of ISO 22435 for industrial applications or ISO 10524-3 for medical
applications.
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oSIST prEN ISO 23826:2021
ISO/DIS 23826:2021(E)
5.4 Mechanical strength
5.4.1 Resistance to hydraulic burst pressure
Valves shall withstand p (see 6.6.1) without permanent visible deformation or burst.
vbt
The hydraulic burst pressure test is given in 6.9.
5.4.2 Resistance to mechanical impact
This document does not include a test to validate that the valve is inherently able to withstand damage
from impact without release of the contents. It is recommended that ball valves are protected during
transport by valve protection caps or valve guards or other acceptable means.
NOTE Applicable transport regulations normally specify the variety of acceptable means. Main valves used
in cylinder bundles according to ISO 10961 are protected by the frame.
5.5 Valve operating mechanism
5.5.1 The valve operating mechanism shall meet the requirements of 5.5.2 to 5.5.5.
5.5
...
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