SIST EN ISO 15995:2021
(Main)Gas cylinders - Specifications and testing of LPG cylinder valves - Manually operated (ISO 15995:2021)
Gas cylinders - Specifications and testing of LPG cylinder valves - Manually operated (ISO 15995:2021)
This document specifies the requirements for design, specification, type testing and production testing and inspection of dedicated LPG manually operated cylinder valves for use with and directly connected to transportable refillable LPG cylinders.
It also includes requirements for associated equipment for vapour and liquid service. Bursting discs and/or fusible plugs are not covered in this document.
Annex B identifies requirements for production testing and inspection.
This document excludes other LPG cylinder devices which are not an integral part of the dedicated manually operated cylinder valve.
This document does not apply to cylinder valves for fixed automotive installations and ball valves.
NOTE For self-closing LPG cylinder valves see ISO 14245. For cylinder valves for compressed, dissolved and other liquefied gases see ISO 10297,[2] ISO 17871[6] or ISO 17879[7].
Gasflaschen - Spezifikation und Prüfung von Flaschenventilen für Flüssiggas (LPG) - Handbetätigt (ISO 15995:2021)
Dieses Dokument legt Anforderungen an Auslegung, Spezifikation, Baumusterprüfung sowie Produktions¬prüfung und Inspektion von handbetätigten Flaschenventilen für Flüssiggas (LPG, en: Liquefied Petroleum Gas) zur Verwendung mit ortsbeweglichen, wiederbefüllbaren LPG-Flaschen fest, an denen die Ventile direkt angeschlossen sind.
Es enthält auch Anforderungen an zugehöriges Zubehör für den Betrieb in der Gas- und Flüssigphase. Berstscheiben und/oder Schmelzsicherungen werden nicht von diesem Dokument abgedeckt.
Anhang B enthält Anforderungen an die Produktionsprüfung und Inspektion.
Dieses Dokument schließt andere LPG-Flascheneinrichtungen aus, die keinen integralen Teil des hand-betätigten Flaschenventils darstellen.
Dieses Dokument gilt nicht für in Fahrzeugen fest eingebaute Flaschenventile und Kugelventile.
ANMERKUNG Für selbstschließende LPG-Flaschenventile siehe ISO 14245. Für Flaschenventile für verdichtete, gelöste und andere verflüssigte Gase siehe ISO 10297 [2], ISO 17871 [6] oder ISO 17879 [7].
Bouteilles à gaz - Spécifications et essais pour valves de bouteilles de GPL - Fermeture manuelle (ISO 15995:2021)
Le présent document spécifie les exigences de conception, les spécifications, les essais de type et les essais et contrôles en production des robinets de bouteilles de GPL dédiés à fonctionnement manuel, destinés à être utilisés avec, et directement raccordés à, des bouteilles de GPL transportables rechargeables.
Le présent document comprend également des exigences relatives aux équipements associés pour le service en phases gazeuse et liquide. Les disques de rupture et/ou les bouchons fusibles ne sont pas couverts par le présent document.
L'Annexe B précise les exigences relatives aux essais et contrôles en production.
Le présent document exclut les autres dispositifs pour bouteilles de GPL qui ne font pas partie intégrante du robinet de bouteille dédié à fonctionnement manuel.
Le présent document ne s'applique pas aux robinets de bouteilles pour installations automobiles fixes, ni aux robinets à tournant sphérique.
NOTE Pour les valves de bouteilles de GPL à fermeture automatique, voir l'ISO 14245. Pour les robinets de bouteilles pour gaz comprimés, dissous et autres gaz liquéfiés, voir l'ISO 10297[2], l'ISO 17871[6] ou l'ISO 17879[7].
Plinske jeklenke - Specifikacija in preskušanje ventilov za jeklenke za utekočinjeni naftni plin (UNP) - Ročno upravljanje (ISO 15995:2021)
Ta dokument določa zahteve za konstruiranje, specifikacijo, tipsko preskušanje ter proizvodno preskušanje
in preverjanje namenskih ročno upravljanih ventilov jeklenk za utekočinjeni naftni plin (LPG), ki se uporabljajo
s premičnimi, ponovno polnljivimi jeklenkami za utekočinjeni naftni plin in so nanje neposredno priključeni.
Vključuje tudi zahteve za pripadajočo opremo za delovanje s paro in tekočino. Ta dokument ne zajema razpočnih plošč
in/ali stikal za varovalko.
V dodatku B so podane zahteve za proizvodno preskušanje in preverjanje.
Ta dokument ne vključuje drugih naprav za jeklenke za utekočinjeni naftni plin, ki niso sestavni del namenskega
ročno upravljanega ventila za jeklenke.
Ta dokument se ne uporablja za ventile za jeklenke pri stalnih namestitvah motornih elementov in kroglične ventile.
OPOMBA: Za samozaporne ventile jeklenk za utekočinjeni naftni plin glej standard ISO 14245. Za ventile jeklenk za stisnjene, raztopljene in druge utekočinjene pline glej standard ISO 10297 [2], ISO 17871 [6] oziroma ISO 17879 [7].
General Information
Relations
Overview
EN ISO 15995:2021 - "Gas cylinders - Specifications and testing of LPG cylinder valves - Manually operated" is a CEN-adopted international standard that defines design, specification, type testing, production testing and inspection requirements for dedicated manually operated LPG cylinder valves used on transportable refillable LPG cylinders. The standard also covers associated equipment for vapour and liquid service, while explicitly excluding bursting discs/fusible plugs, fixed automotive installation valves and ball valves. Annex B addresses production testing and inspection requirements.
Key topics and technical requirements
The document organizes technical requirements and tests that ensure safety, reliability and compatibility of LPG cylinder valves. Major topics include:
- Design and specification
- General design rules, essential and optional components (valve body, stem, outlet, excess flow devices, pressure relief valves, eduction tubes, liquid level indicators, sealing caps, sediment tubes).
- Material selection and operating temperature considerations, including metallic and non‑metallic component guidance.
- Performance and safety requirements
- Leak tightness (external and internal), operating, opening and closing torque limits.
- Requirements for excess flow valves and non‑return valves where applicable.
- Type testing
- Hydraulic pressure tests, valve stem tests, hand‑wheel fire exposure tests, impact tests, excessive opening/closing torque tests, endurance (cycling) tests.
- Examination of dismantled valves and inspection criteria after testing.
- Production testing and inspection
- Annex B identifies mandatory production checks and inspection steps to maintain conformity in manufacturing.
Practical applications and who uses this standard
EN ISO 15995:2021 is used to ensure safe operation and regulatory compliance of manually operated LPG cylinder valves across the supply chain. Typical users include:
- LPG cylinder valve manufacturers - for design validation, type approval and production quality control.
- Test laboratories and certification bodies - to perform type tests and verify conformity to EN ISO 15995:2021.
- LPG equipment designers and OEMs - for specifying compatible valve features and associated equipment (vapour/liquid service).
- Regulatory authorities and safety inspectors - to assess compliance, installation safety and marketplace surveillance.
- Service centers and cylinder refillers - to understand valve characteristics, torque limits and replacement criteria.
Related standards
- ISO 14245 - self‑closing LPG cylinder valves
- ISO 10297, ISO 17871, ISO 17879 - cylinder valves for compressed, dissolved and other liquefied gases
Keywords: EN ISO 15995:2021, LPG cylinder valves, gas cylinders, valve testing, production testing, leak tightness, excess flow valve, valve design, CEN.
Frequently Asked Questions
SIST EN ISO 15995:2021 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Gas cylinders - Specifications and testing of LPG cylinder valves - Manually operated (ISO 15995:2021)". This standard covers: This document specifies the requirements for design, specification, type testing and production testing and inspection of dedicated LPG manually operated cylinder valves for use with and directly connected to transportable refillable LPG cylinders. It also includes requirements for associated equipment for vapour and liquid service. Bursting discs and/or fusible plugs are not covered in this document. Annex B identifies requirements for production testing and inspection. This document excludes other LPG cylinder devices which are not an integral part of the dedicated manually operated cylinder valve. This document does not apply to cylinder valves for fixed automotive installations and ball valves. NOTE For self-closing LPG cylinder valves see ISO 14245. For cylinder valves for compressed, dissolved and other liquefied gases see ISO 10297,[2] ISO 17871[6] or ISO 17879[7].
This document specifies the requirements for design, specification, type testing and production testing and inspection of dedicated LPG manually operated cylinder valves for use with and directly connected to transportable refillable LPG cylinders. It also includes requirements for associated equipment for vapour and liquid service. Bursting discs and/or fusible plugs are not covered in this document. Annex B identifies requirements for production testing and inspection. This document excludes other LPG cylinder devices which are not an integral part of the dedicated manually operated cylinder valve. This document does not apply to cylinder valves for fixed automotive installations and ball valves. NOTE For self-closing LPG cylinder valves see ISO 14245. For cylinder valves for compressed, dissolved and other liquefied gases see ISO 10297,[2] ISO 17871[6] or ISO 17879[7].
SIST EN ISO 15995:2021 is classified under the following ICS (International Classification for Standards) categories: 23.020.35 - Gas cylinders; 23.060.40 - Pressure regulators. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN ISO 15995:2021 has the following relationships with other standards: It is inter standard links to SIST EN ISO 15995:2019, SIST EN ISO 15995:2021/A1:2024. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN ISO 15995:2021 is associated with the following European legislation: EU Directives/Regulations: 2008/68/EC; Standardization Mandates: M/TDG. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase SIST EN ISO 15995:2021 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2021
Nadomešča:
SIST EN ISO 15995:2019
Plinske jeklenke - Specifikacija in preskušanje ventilov za jeklenke za utekočinjeni
naftni plin (UNP) - Ročno upravljanje (ISO 15995:2021)
Gas cylinders - Specifications and testing of LPG cylinder valves - Manually operated
(ISO 15995:2021)
Gasflaschen - Spezifikation und Prüfung von Flaschenventilen für Flüssiggas (LPG) -
Handbetätigt (ISO 15995:2021)
Bouteilles à gaz - Spécifications et essais pour valves de bouteilles de GPL - Fermeture
manuelle (ISO 15995:2021)
Ta slovenski standard je istoveten z: EN ISO 15995:2021
ICS:
23.020.35 Plinske jeklenke Gas cylinders
23.060.40 Tlačni regulatorji Pressure regulators
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 15995
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2021
EUROPÄISCHE NORM
ICS 23.020.35 Supersedes EN ISO 15995:2019
English Version
Gas cylinders - Specifications and testing of LPG cylinder
valves - Manually operated (ISO 15995:2021)
Bouteilles à gaz - Spécifications et essais pour valves de Gasflaschen - Spezifikation und Prüfung von
bouteilles de GPL - Fermeture manuelle (ISO Flaschenventilen für Flüssiggas (LPG) - Handbetätigt
15995:2021) (ISO 15995:2021)
This European Standard was approved by CEN on 6 June 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 15995:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 15995:2021) has been prepared by Technical Committee ISO/TC 58 "Gas
cylinders" in collaboration with Technical Committee CEN/TC 286 “Liquefied petroleum gas equipment
and accessories” the secretariat of which is held by NSAI.
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 December 2021, and conflicting national standards
shall be withdrawn at the latest by December 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.
This document supersedes EN ISO 15995:2019.
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 15995:2021 has been approved by CEN as EN ISO 15995:2021 without any modification.
INTERNATIONAL ISO
STANDARD 15995
Third edition
2021-06
Gas cylinders — Specifications and
testing of LPG cylinder valves —
Manually operated
Bouteilles à gaz — Spécifications et essais pour valves de bouteilles de
GPL — Fermeture manuelle
Reference number
ISO 15995:2021(E)
©
ISO 2021
ISO 15995:2021(E)
© 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
ii © ISO 2021 – All rights reserved
ISO 15995:2021(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design and specification. 4
4.1 General . 4
4.2 Materials . 5
4.2.1 General. 5
4.2.2 Operating temperatures . 5
4.2.3 Copper alloys . 5
4.2.4 Non-metallic materials . 5
4.3 Essential components . 6
4.3.1 Valve operating mechanism . 6
4.3.2 Valve body . 6
4.3.3 Valve stem . 6
4.3.4 Valve outlet . 6
4.3.5 Excess flow valve . 7
4.4 Optional components . 7
4.4.1 General. 7
4.4.2 Pressure relief valve . 7
4.4.3 Eduction tube . 7
4.4.4 Fixed liquid level gauge . 7
4.4.5 Excess flow valve . 7
4.4.6 Non-return valve . 8
4.4.7 Liquid level indicator . 8
4.4.8 Sealing cap and sealing plug . 8
4.4.9 Sediment tube . 8
4.5 Leak tightness . 8
4.6 Operating torque . 8
4.7 Closing torque . 8
4.8 Opening torque . 8
5 Valve type test . 9
5.1 General . 9
5.2 Test samples . 9
5.3 Test procedure and test requirements .10
5.4 Inspection .11
5.5 Hydraulic pressure test .11
5.5.1 Procedure .11
5.5.2 Requirement .11
5.6 External and internal leak tightness tests .11
5.6.1 Procedure .11
5.6.2 Requirement .12
5.7 Valve stem test .12
5.7.1 Procedure .12
5.7.2 Requirement .13
5.8 Hand wheel fire exposure test .13
5.8.1 Procedure .13
5.8.2 Requirement .13
5.9 Impact test .13
5.9.1 General.13
5.9.2 Procedure .13
ISO 15995:2021(E)
5.9.3 Requirement .15
5.10 Excessive closing torque test .15
5.10.1 Procedure .15
5.10.2 Requirement .15
5.11 Excessive opening torque test.15
5.11.1 Procedure .15
5.11.2 Requirement .15
5.12 Endurance test .16
5.12.1 Procedure .16
5.12.2 Requirement .16
5.13 Examination of dismantled valves .16
5.13.1 Procedure .16
5.13.2 Requirement .17
5.14 Excess flow valve test .17
5.14.1 General.17
5.14.2 Excess flow valve test with air .17
5.14.3 Excess flow valve test with water .17
5.14.4 Excess flow strength test .18
5.15 Non-return valve test .18
5.15.1 Procedure .18
5.15.2 Requirement .18
5.16 Vibration test .19
5.16.1 Procedure .19
5.16.2 Requirement .19
6 Documentation and test report.19
6.1 Documentation .19
6.2 Test report .19
7 Production testing .19
8 Markings .19
Annex A (normative) Special valves .21
Annex B (normative) Production testing and inspection .22
Annex C (normative) Special low temperature requirements .23
Annex D (normative) Vibration testing .24
Bibliography .25
iv © ISO 2021 – All rights reserved
ISO 15995:2021(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 286, Liquefied petroleum gas equipment and accessories, in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 15995:2019) of which it constitutes a
minor revision. The changes compared to the previous edition are as follows:
— correction of Clause 8, list item c).
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
ISO 15995:2021(E)
Introduction
This document covers the function of a LPG cylinder valve as a closure (defined by the UN Model
[15]
Regulations ).
This document has been written so that it is suitable to be referenced in the UN Model Regulations.
Cylinder valves complying with this document can be expected to perform satisfactorily under normal
service conditions.
When an LPG cylinder valve has been approved according to a previous version of this document, the
body responsible for approving the same LPG cylinder valve to this new edition should consider which
tests need to be performed.
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.
vi © ISO 2021 – All rights reserved
INTERNATIONAL STANDARD ISO 15995:2021(E)
Gas cylinders — Specifications and testing of LPG cylinder
valves — Manually operated
1 Scope
This document specifies the requirements for design, specification, type testing and production testing
and inspection of dedicated LPG manually operated cylinder valves for use with and directly connected
to transportable refillable LPG cylinders.
It also includes requirements for associated equipment for vapour and liquid service. Bursting discs
and/or fusible plugs are not covered in this document.
Annex B identifies requirements for production testing and inspection.
This document excludes other LPG cylinder devices which are not an integral part of the dedicated
manually operated cylinder valve.
This document does not apply to cylinder valves for fixed automotive installations and ball valves.
NOTE For self-closing LPG cylinder valves see ISO 14245. For cylinder valves for compressed, dissolved and
[2] [6] [7]
other liquefied gases see ISO 10297, ISO 17871 or ISO 17879 .
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 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 2859-1:1999, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
ISO 13341, Gas cylinders — Fitting of valves to gas cylinders
ISO 10286, Gas cylinders — Terminology
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
ISO 15995:2021(E)
3.1
liquefied petroleum gas
LPG
low pressure liquefied gas composed of one or more light hydrocarbons which are assigned to UN 1011,
UN 1075, UN 1965, UN 1969 or UN 1978 only and which consists mainly of propane, propene, butane,
butane isomers, butene with traces of other hydrocarbon gases
[SOURCE: ISO 10286:2015, 723, modified.]
3.2
cylinder valve
valve
primary shutoff device fitted to LPG cylinders, intended for liquid or vapour filling and withdrawal
Note 1 to entry: The valve includes the valve body (3.8), valve stem (3.14), valve outlet (3.15) and valve operating
mechanism (3.22).
Note 2 to entry: The valve can also include additional devices, e.g. eduction tube (3.5), liquid level indicator (3.7),
fixed liquid level gauge (3.6), excess flow valve (3.9), non-return valve (3.10), sediment tube (3.19), and pressure
relief valve (3.30).
3.3
external leak tightness
leak tightness to atmosphere (leakage in and/or leakage out), when the valve is open
3.4
internal leak tightness
leak tightness across the valve seat (leakage in and/or leakage out), when the valve is closed
3.5
eduction tube
tube fitted to the valve to allow withdrawal of liquid LPG with the cylinder in its normal operating
position
3.6
fixed liquid level gauge
device such as a dip tube in combination with a vent valve to verify that the predetermined maximum
liquid level in a cylinder has been reached or surpassed
3.7
liquid level indicator
device such as a float gauge, permitting the gauging of the liquid level in the cylinder
3.8
valve body
major valve component including valve stem (3.14) and valve outlet (3.15) and, where applicable, the
provision for other optional components
3.9
excess flow valve
valve comprising two or more components 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 valve has been restored below a certain value
3.10
non-return valve
automatic valve which allows gas/liquid to flow only in one direction
[SOURCE: ISO 10286:2015, 349, amended — liquid added.]
2 © ISO 2021 – All rights reserved
ISO 15995:2021(E)
3.11
dual valve
valve designed to allow separate vapour and liquid withdrawal from a cylinder in its normal operating
position each port having its own valve operating mechanism
3.12
sealing element
element used to obtain internal leak tightness (3.4)
3.13
special valve
valve which is only used for cylinders up to and including 7,5 l water capacity, having a hand wheel
diameter less than 30 mm and where the maximum section of gas passage is not more than 4 mm
diameter
3.14
valve stem
section of the valve body (3.8), which connects to the cylinder
3.15
valve outlet
section of the valve body (3.8) to which a regulator or connector can be fitted for vapour or liquid
withdrawal
Note 1 to entry: The valve outlet is also normally used for filling the cylinder.
3.16
type test
test or series of tests conducted to prove that the design meets the requirements of this document
3.17
cylinder opening
part of the cylinder to which the valve stem (3.14) connects
3.18
test pressure
pressure at which the valve or component is tested
3.19
sediment tube
device designed to reduce the risk of foreign matter, which can be in the cylinder, entering the valve
3.20
sealing cap
device which is intended to seal the external outlet connection of a valve
[SOURCE: ISO 10286:2015, 368]
3.21
sealing plug
device which is intended to seal the internal outlet connection of a valve
[SOURCE: ISO 10286:2015, 369]
3.22
valve operating mechanism
mechanism which closes and opens the valve orifice and which includes the internal and external
sealing systems
[SOURCE: ISO 10286:2015, 328, modified — EXAMPLE deleted.]
Note 1 to entry: Normally the valve operating mechanism includes the hand wheel.
ISO 15995:2021(E)
3.23
operating torque
torque during opening or closing the valve, after the first half rotation of the hand wheel in opening the
valve and before the last half rotation of the hand wheel in closing the valve
3.24
opening torque
initial torque required to open the valve from the closed position
3.25
closing torque
torque required to close the valve and obtain internal leak tightness (3.4)
3.26
valve protection cap
device securely fixed over the valve during handling, transport and storage and which is removed for
access to the valve
[SOURCE: ISO 10286:2015, 360]
3.27
valve shroud
integral part of a cylinder which is permanently attached for valve protection during transportation,
handling and storage
[SOURCE: ISO 10286:2015, 362]
3.28
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
3.29
gross mass
total package mass of the heaviest cylinder on which the valve is intended to be fitted, including any
permanently attached accessories and the maximum mass of the LPG content
3.30
pressure relief valve
pressure actuated valve held shut by a spring or other means and designed to relieve excessive pressure
automatically by starting to open at the set pressure and reclosing after the pressure has fallen below
the set pressure
3.31
nominal set pressure
predetermined pressure of the pressure relief valve (3.30) at which the valve is set to start to discharge
4 Design and specification
4.1 General
The valve shall be capable of withstanding:
a) operating pressures and test pressures;
b) operating temperatures and test temperature;
c) mechanical stresses during operation;
d) vibration during transport.
4 © ISO 2021 – All rights reserved
ISO 15995:2021(E)
The valve shall be externally and internally leak tight for the full range of pressure and temperature
conditions.
The valve and its optional components shall be secured to prevent unintentional disassembly during
normal operation and their function shall not be affected as a result of vibration during transport.
4.2 Materials
4.2.1 General
Materials in contact with LPG shall be physically and chemically compatible with LPG under all
operating conditions for which the valve is designed in accordance with ISO 11114-1 and ISO 11114-2.
In selecting an appropriate material for valve components, it is important to select not only for
adequate strength in service, but also to give consideration to other modes of failure due to atmospheric
corrosion, brass dezincification, stress corrosion, shock loads, and material failure.
4.2.2 Operating temperatures
Materials used shall be suitable for the temperatures for which the valve is designed.
The minimum operating temperature to which the valve is expected to be exposed during normal use
is −20 °C. For some countries and for certain applications, lower minimum operating temperatures
are used. When valves are designed for an operating temperature of −40 °C, they shall also meet the
requirements of Annex C.
The maximum operating temperature to which the valve is expected to be exposed during normal
operation is +65 °C.
4.2.3 Copper alloys
Valve bodies made from copper alloys shall be manufactured from materials in accordance with
[9] [10]
recognized international, regional (e.g. EN 12164 and EN 12165 ) or national standards or from
alloys of equivalent properties and standards.
4.2.4 Non-metallic materials
Non-metallic materials in contact with LPG shall be compatible with LPG and shall not fail during the
valve service life. They shall not distort, harden, swell or adhere to the body or seat face to such an
extent as to impair the function of the valve.
[8]
In accordance with recognized international, regional (e.g. EN 549 ) or national standards, rubber
materials in contact with LPG, for temperatures of –20 °C (–40 °C for low temperature applications) to
+65 °C, shall meet the requirements for resistance to:
a) gas (n-pentane test);
b) lubricants;
c) ageing;
d) compression;
e) ozone (where the material is exposed to the atmosphere); and
f) condensate/liquid phase of combustible gases (liquid B test).
ISO 15995:2021(E)
4.3 Essential components
4.3.1 Valve operating mechanism
The valve operating mechanism shall be designed in such a way that it remains captive and achieves
direct contact with the valve body in the absence of the sealing element, in order to limit the leakage
rate of gas and shall satisfy the requirements of 5.4. There shall be sufficient travel distance for the
valve operating mechanism so that the seal housing makes contact with the seat.
The valve shall operate without difficulty, even after prolonged use, and shall satisfy the requirements
of 5.13.
When a torque is applied in excess of that given in 5.10 and 5.11 the valve operating mechanism shall not
disassemble from the valve body and the valve shall not leak. However, the valve operating mechanism
may break or become inoperable.
The material of the hand wheel shall withstand fire engulfment such that the valve can still be closed
by hand or using a simple tool after cooling, during the early stage of an incident, and shall satisfy the
requirements of 5.8.
The sealing element shall be attached or otherwise assembled and shall not become dislocated under
service conditions to ensure internal leak tightness. The means to secure the sealing element shall not
rely only on adhesive.
All valves shall close when turned clockwise and open when turned anti-clockwise. The hand wheel
shall be visibly marked with a portion of circle terminating by two arrows. One arrow shall be marked
with “–” (closure) and the other arrow with “+” (opening) to indicate the result of the rotation.
4.3.2 Valve body
If the valve body is made of more than one part, precautions shall be taken to ensure that there can be
no unintentional disassembly.
4.3.3 Valve stem
Valve inlet connections shall conform to an international, regional or national standard.
[3] [5]
NOTE Valve inlet connection standards are for example ISO 11363-1 and ISO 15245-1 .
The design of the valve stem shall prevent leakage, loosening in service, and meet the requirements of
5.7.
Tapered valve stems shall withstand the torque identified in Table 3, without causing such damage as
to affect performance, valve operating mechanism, internal leak tightness and external leak tightness.
However, such torque values shall not be used for normal operational applications, see ISO 13341.
Parallel threaded valve stems shall withstand the torque identified in 5.7 d).
4.3.4 Valve outlet
Valve outlet connections shall conform to an international, regional or national standard.
[1] [12]
NOTE Valve outlet connection standards are, for example, ISO 5145 and EN 15202 .
In the case of a vapour/liquid dual valve, the following requirements shall apply:
a) The valve shall have separate vapour and liquid outlet connections. The wall thickness between the
passageways through the valve body shall not be less than 1 mm.
b) The liquid outlet shall be a different design from that of the vapour outlet. Valves with liquid
and vapour outlets shall have clear identification to distinguish between them, such as different
connection geometry and/or marking the outlet connections.
6 © ISO 2021 – All rights reserved
ISO 15995:2021(E)
c) It shall not be possible to obtain a flow from the liquid outlet before a leak tight connection has
been made. This shall be verified by dimensional check in accordance with 5.4.
4.3.5 Excess flow valve
Valves with passageways of cross-sectional area equivalent to or greater than a 3 mm diameter hole for
liquid, or an 8 mm diameter hole for vapour, shall be protected by an excess flow valve (see 4.4.5).
This requirement is not applicable for hot air balloon applications where a risk assessment identifies
that the fitting of an excess flow valve would constitute a significant hazard.
4.4 Optional components
4.4.1 General
Optional components, if fitted, shall meet the following requirements.
All optional components necessary for the correct function of the valve, shall be secured to prevent
unintentional disassembly during normal operation and/or their function shall not be affected, as a
result of vibration during transportation.
Valves including their intended optional components shall be designed to ensure external and internal
leak tightness.
4.4.2 Pressure relief valve
Pressure relief valves shall be designed to operate in the vapour phase. Pressure relief valves for
[11]
LPG cylinders shall conform to an international, regional (e.g. EN 13953 ) or national standard.
4.4.3 Eduction tube
Eduction tubes shall be securely fitted to the valve to ensure that they do not disassemble during
operation, for example using adhesive, press fitting or any other mechanical means.
4.4.4 Fixed liquid level gauge
Fixed liquid level gauges that operate by means of temporarily venting a limited quantity of LPG shall
meet the following requirements:
a) The cross-section of the passage way through the gauge body shall at some point be limited to an
area equivalent to or less than a 1,5 mm diameter hole.
b) The orifice shall be controlled by a vent screw.
c) The vent screw shall remain captive or be permanently attached to the gauge body.
The length of the dip tube should be sized to match the maximum liquid contents of the cylinder.
4.4.5 Excess flow valve
Excess flow valves shall be designed so that the excess flow valve function does not interfere with the
operation of a pressure relief valve and/or fusible plug.
Excess flow valves shall be designed so that when closed the flow past the seat, to allow for reduction
of differential pressure across the valve, shall not exceed that of an opening of 1,8 mm cross sectional
area.
ISO 15995:2021(E)
Excess flow valves shall operate at a flow-rate of not more than 10 % above, nor less than 20 % below
the rated closing flow capacity specified and it shall close automatically at a pressure differential across
the valve of not more than 1,4 bar.
The connection to the cylinder shall not affect the function of the valve or its rated flow.
4.4.6 Non-return valve
Non-return valves with soft seats shall maintain internal tightness throughout the valve service life.
Non-return valves shall be designed so that, when closed, the reverse flow past the seat meet the
requirements of 5.15.2 at room temperature (typically between 15 °C and 30 °C).
4.4.7 Liquid level indicator
Liquid level indicators shall be designed not to interfere with the performance of the pressure relief
valve or excess flow valve (if fitted).
4.4.8 Sealing cap and sealing plug
The valve may also be fitted with a sealing cap or sealing plug. Sealing caps and sealing plugs shall
[13]
conform to an international, regional (e.g. EN 16119 ) or national standard.
4.4.9 Sediment tube
The sediment tube inlet shall be in the vapour space when the cylinder is in its normal operating
orientation at its maximum fill and operating temperature.
4.5 Leak tightness
The leak rate for external and internal leak tightness shall not exceed the
...
La norme SIST EN ISO 15995:2021 présente des exigences essentielles concernant les vannes de cylindre GPL manuellement operées, destinées à assurer la sécurité et l'efficacité des dispositifs utilisés avec des cylindres GPL rechargeables transportables. Son champ d'application est clairement défini, se concentrant uniquement sur les vannes spécifiquement conçues pour la connexion directe aux cylindres de GPL. Parmi les points forts de cette norme, on trouve la clarté et la précision des exigences en matière de conception, de spécification et de tests de type, ainsi que l'inspection de production. Ces critères garantissent que les vannes respectent des standards stricts, contribuant ainsi à la sécurité lors du stockage et de l'utilisation du GPL. L'annexe B est particulièrement pertinente, car elle décrit en détail les exigences pour les tests de production et l'inspection, assurant ainsi que chaque vanne est testée pour sa performance et sa durabilité avant sa mise sur le marché. De plus, la norme précise clairement les équipements associés pour les services de vapeur et de liquide, tout en excluant les dispositifs de cylindre GPL qui ne font pas partie intégrante des vannes manuellement opérées. Cela permet aux fabricants et aux utilisateurs de se concentrer sur des solutions adaptées et spécifiques, sans ambiguïté quant aux dispositifs concernés. L'importance de cette norme réside également dans sa pertinence pour le secteur du GPL, assurant que les produits mis sur le marché sont conformes aux standards internationaux de sécurité et d'efficacité. En ne s'appliquant pas aux vannes pour installations automobiles fixes ni aux vannes à boule, la norme se concentre uniquement sur les usages requis, renforçant ainsi sa valeur pour les acteurs impliqués dans la fabrication et l'utilisation des vannes de cylindres GPL. En somme, la norme SIST EN ISO 15995:2021 constitue un cadre robuste et pertinent pour la conception et la validation des vannes de cylindre GPL manuellement opérées, garantissant ainsi une meilleure sécurité et fiabilité dans l'utilisation de ces systèmes.
Das Dokument SIST EN ISO 15995:2021 ist ein bedeutender Standard, der sich auf die Spezifikationen und Prüfungen von manuell betriebenen LPG-Zylinderventilen konzentriert. Der Umfang dieses Standards umfasst spezifische Anforderungen für das Design, die Spezifikation und die verschiedenen Prüfungen, einschließlich Typ- und Produktionstests, die für die Herstellung und Inspektion von LPG-zylinderventilen erforderlich sind. Dies ist besonders relevant für die Nutzung mit transportablen, nachfüllbaren LPG-Zylindern. Ein wesentlicher Stärke des Standards besteht darin, dass er nicht nur die Anforderungen für die Ventile selbst definiert, sondern auch die damit verbundenen Ausrüstungen für Dampfdienst und Flüssigkeitsdienst berücksichtigt. Diese ganzheitliche Betrachtung sorgt dafür, dass alle kritischen Aspekte bei der Entwicklung und Prüfung dieser sicherheitsrelevanten Komponenten abgedeckt sind. Die Anhänge, insbesondere Annex B, bieten klare Richtlinien zu den Anforderungen an Produktionstests und Inspektion, was sowohl Herstellern als auch Prüfinstitutionen eine wertvolle Orientierung gibt. Diese detaillierten Vorgaben tragen zur Verbesserung der Qualität und Sicherheit von LPG-Zylinderventilen bei und stellen sicher, dass die Produkte den internationalen Standards entsprechen. Es ist ebenfalls wichtig zu betonen, dass der Standard spezifisch auf manuell betriebene Zylinderventile abzielt und klarstellt, dass andere Arten von LPG-Geräten, die nicht integraler Bestandteil des Ventils sind, nicht abgedeckt werden. Dies verleiht dem Standard eine präzise Fokussierung, die für Hersteller von großem Nutzen ist. Die Relevanz von SIST EN ISO 15995:2021 in der Branche kann nicht überschätzt werden, da die Sicherheit und Zuverlässigkeit von LPG-Zylinderventilen einen entscheidenden Einfluss auf die Gesamtsicherheit im Umgang mit flüssigem Gas hat. Durch die klare Definition der Anforderungen und Prüfverfahren wird eine grundlegende Basis für High-Performance Produkte geschaffen, die den Anforderungen des Marktes gerecht werden.
SIST EN ISO 15995:2021 표준 문서는 LPG(액화석유가스)용 수동 조작 실린더 밸브의 설계, 사양, 유형 시험 및 생산 시험에 대한 요구 사항을 명확히 지정하고 있습니다. 이 표준은 이동 가능하고 재충전이 가능한 LPG 실린더에 직접 연결되어 사용되는 전용 수동 조작 실린더 밸브에 중점을 두고 있으며, 관련 장비의 요구 사항도 포함되어 있습니다. 이 표준의 강점 중 하나는 특정한 목적을 위해 고안된 장비에 대한 명확한 요구 사항을 제공함으로써 제조업체와 사용자가 품질 기준을 충족하도록 지원하는 것입니다. 특히, 생산 시험 및 검사에 대한 요구 사항을 명시한 부록 B는 품질 보증을 위한 중요한 요소로 작용하며, 이는 LPG 실린더 밸브의 신뢰성을 높이는 데 기여합니다. 또한, 이 문서는 다른 관리되지 않는 LPG 실린더 장치나 고정 자동차 설치용 밸브와 같은 외부 장비에 대해서는 적용되지 않음을 분명히 하여 사용자들이 자신의 설비와 관련된 요구 사항을 혼동하지 않도록 돕습니다. 이는 특정 용도에 대한 명확한 범위를 제시하므로, 사용자는 해당 표준을 바탕으로 정확한 적용을 할 수 있습니다. 결론적으로, SIST EN ISO 15995:2021은 LPG 수동 조작 실린더 밸브에 관한 포괄적인 기술 요구 사항과 검사 기준을 제시하여, 제조업체와 설치업체가 제품의 안전성과 성능을 보장하도록 하는 필수 문서라 할 수 있습니다.
The SIST EN ISO 15995:2021 standard presents a comprehensive framework for the specifications and testing of LPG cylinder valves tailored for manual operation. The standard meticulously outlines requirements concerning the design, specification, type testing, and production testing of dedicated LPG manually operated cylinder valves. This targeted focus on LPG valves enhances safety and reliability in the handling of transportable refillable LPG cylinders, addressing both vapour and liquid service components effectively. One of the notable strengths of the standard is its stringent emphasis on production testing and inspection, as highlighted in Annex B. This ensures that each valve meets predefined safety and performance criteria before reaching the end-user, thereby significantly reducing risks associated with LPG usage. The exclusion of bursting discs and fusible plugs from the standard's purview helps maintain a clear focus on the valves themselves, while also delineating the scope of this document from other related equipment. The relevance of SIST EN ISO 15995:2021 stands out in today's context, where the demand for LPG as a fuel source is prevalent across various sectors. By establishing clear guidelines and technical specifications for manually operated cylinder valves, the standard plays a crucial role in ensuring that these components are both functional and safe. Additionally, the documentation specifies that it does not cover devices that are not integral to the dedicated manually operated valves, such as cylinder valves for fixed automotive installations or ball valves, which further refines its applicability. In summary, SIST EN ISO 15995:2021 serves as an essential standard for manufacturers, regulators, and end-users alike, ensuring that LPG cylinder valves fulfill necessary operational and safety requirements. Its focused approach towards type testing and production inspection underscores its importance in the context of LPG safety regulations and operational efficiency.
SIST EN ISO 15995:2021は、手動操作が可能なLPGシリンダーバルブの設計、仕様、タイプ試験及び生産試験、および検査に関する要求事項を規定しています。この標準の適用範囲は、移動可能な再充填可能LPGシリンダーに直接接続される専用の手動操作シリンダーバルブに特化しており、関連機器の要件も含んでいます。特に、蒸気と液体サービス用の付属機器に対する説明がされていることが強みです。 この標準の強みは、手動操作のLPGバルブに必要な具体的な規格を提供することにより、安全性と信頼性を高める点にあります。バルブの設計と試験プロセスを明確にすることで、製造業者が一貫した品質管理を実現する手助けをし、業界全体の標準化を促進します。 また、SIST EN ISO 15995:2021は、生産試験や検査に関する要件を附属書Bで明記しており、製品の一貫性を保証するための実用的ガイドラインを提示しています。この標準は、固定メーカー設置用のシリンダーバルブやボールバルブには適用されないことを明確にしており、対象範囲の明瞭さも評価されるポイントです。 標準文書の信頼性は、国際的な基準に基づいており、業界のニーズに応じた技術開発を支える重要な文書としての位置付けを持ちます。特に、ISO 14245やISO 10297等の他の関連標準との併用で、LPGシリンダーバルブに関する網羅的な理解が促進される点も重要です。全体として、SIST EN ISO 15995:2021は、LPGシリンダーバルブの分野における技術的な信頼性と安全性を確保するための重要な基盤を提供する文書となっています。
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