EN 1555-4:2021
(Main)Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 4: Valves
Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 4: Valves
This document specifies the characteristics of valves made from polyethylene (PE) for piping systems in the field of the supply of gaseous fuels.
It is applicable to isolating unidirectional and bi-directional valves with spigot ends or electrofusion sockets intended to be fused with PE pipes or fittings conforming to EN 1555-2:2021 and EN 1555-3:2021 respectively.
Valves made from materials other than PE, designed for the supply of gaseous fuels conforming to the relevant standards can be used in PE piping systems according to EN 1555 (all parts), provided that they have PE connections for butt fusion or electrofusion ends, including integrated material transition joints, conforming to EN 1555-3:2021.
It also specifies the test parameters for the test methods referred to in this document.
In conjunction with Parts 1, 2, 3 and 5 of EN 1555, it is applicable to PE valves, their joints and to joints with components of PE and other materials intended to be used under the following conditions:
a) a maximum operating pressure, MOP, up to and including 10 bar1 at a reference temperature of 20 °C for design purposes;
NOTE 1 For the purpose of this document and the references to EN ISO 82332, MOP is considered to be nominal pressure.
b) an operating temperature between −20 °C to 40 °C.
NOTE 2 For operating temperatures between 20 °C and 40 °C, derating coefficients are defined in EN 1555-5.
EN 1555 (all parts) covers a range of maximum operating pressures and gives requirements concerning colours.
NOTE 3 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes.
This document covers valve bodies designed for connection with pipes with a nominal outside diameter dn ≤ 400 mm.
Kunststoff-Rohrleitungssysteme für die Gasversorgung - Polyethylen (PE) - Teil 4: Armaturen
Dieses Dokument legt die Eigenschaften von Armaturen aus Polyethylen (PE) für Rohrleitungssysteme im Bereich der Versorgung mit gasförmigen Brennstoffen fest.
Es ist anzuwenden für Absperrarmaturen mit einer und mit zwei Durchflussrichtungen, die über Schweißenden oder Heizwendel-Schweißmuffen verfügen, und dafür vorgesehen sind, mit Rohren oder Formstücken aus PE nach EN 1555 2:2021 bzw. EN 1555 3:2021 verschweißt zu werden.
Armaturen aus anderen Werkstoffen als PE, die für die Versorgung mit gasförmigen Brennstoffen in Übereinstimmung mit den maßgebenden Normen ausgelegt sind, können in PE Rohrleitungssystemen nach EN 1555 (alle Teile) unter der Voraussetzung verwendet werden, dass sie über PE Anschlüsse für Stumpf- oder Heizwendelschweißung einschließlich integrierter Werkstoffübergangsverbindungen nach EN 1555 3:2021 verfügen.
Das Dokument legt auch die Prüfparameter für die Prüfverfahren fest, auf die in diesem Dokument verwiesen wird.
In Verbindung mit Teil 1, Teil 2, Teil 3 und Teil 5 von EN 1555 gilt es für Armaturen aus PE, deren Verbindungen untereinander sowie mit Rohrleitungsteilen aus PE und anderen Werkstoffen, die für die Verwendung unter den folgenden Bedingungen vorgesehen sind:
a) für einen maximal zulässigen Betriebsdruck MOP (en: maximum operating pressure) von höchstens 10 bar bei einer Bezugstemperatur von 20 °C für Bemessungszwecke;
ANMERKUNG 1 Für die Anwendung dieses Dokumentes und der Verweisungen auf EN ISO 82332 wird MOP als Nenndruck angesehen.
b) für eine Betriebstemperatur zwischen −20 °C und 40 °C.
ANMERKUNG 2 Für Betriebstemperaturen zwischen 20 °C und 40 °C sind Minderungsfaktoren festgelegt in EN 1555 5.
EN 1555 (alle Teile) deckt einen Bereich von maximal zulässigen Betriebsdrücken ab und enthält Anforderungen bezüglich Farben.
ANMERKUNG 3 Es liegt in der Verantwortung des Auftraggebers oder Planers, aus diesen Kriterien die geeignete Auswahl zu treffen, unter Berücksichtigung ihrer spezifischen Anforderungen und jeglicher relevanter nationaler Festlegungen und Verfahrensweisen oder Vorschriften für die Verlegung.
Dieses Dokument behandelt Armaturenkörper, die für die Verbindung mit Rohren mit einem Nennaußendurchmesser dn ≤ 400 mm ausgelegt sind.
Systèmes de canalisations en plastique pour la distribution de combustibles gazeux — Polyéthylène (PE) — Partie 4 : Robinets
Le présent document spécifie les caractéristiques des robinets en polyéthylène (PE) pour les systèmes de canalisations destinés à la distribution de combustibles gazeux.
Il s’applique aux robinets d’isolement unidirectionnels et aux robinets d’isolement bidirectionnels avec des extrémités à bouts mâles ou des emboîtures électrosoudables prévues pour être soudées à des tubes ou à des raccords en PE conformes à l’EN 1555-2:2021 et à l’EN 1555-3:2021, respectivement.
Les robinets fabriqués à partir d’autres matières que le PE, conçus pour la distribution de combustibles gazeux conformes aux normes applicables, peuvent être utilisés dans les systèmes de canalisations en PE conformément à l’EN 1555 (toutes les parties), à condition qu’ils aient des raccordements en PE pour soudage bout à bout ou des extrémités électrosoudables ainsi que des assemblages de transition intégrés conformes à l’EN 1555-3:2021.
Il spécifie également les paramètres d’essai pour les méthodes d’essai référencées dans le présent document.
Conjointement avec les Parties 1, 2, 3 et 5 de l’EN 1555, il s’applique aux robinets en PE et à leurs assemblages, ainsi qu’aux assemblages avec des composants en PE et en d’autres matières destinés à être
utilisés dans les conditions suivantes :
a) une pression maximale de service, MOP, inférieure ou égale à 10 bar1, à une température de référence de 20 °C pour les besoins des calculs ;
NOTE 1 Pour les besoins du présent document et en référence à l’EN ISO 82332, la MOP est considérée comme la pression nominale.
b) une température de service comprise entre –20 °C et 40 °C.
NOTE 2 Pour des températures de service comprises entre 20 °C et 40 °C, les facteurs de réduction sont définis dans l’EN 1555-5.
L’EN 1555 (toutes les parties) couvre une gamme de pressions maximales de service et donne les exigences concernant les couleurs.
NOTE 3 Il est de la responsabilité de l’acheteur ou du prescripteur d’effectuer les choix appropriés à partir de ces données, en tenant compte des exigences particulières et de toute réglementation nationale applicable, ainsi que des pratiques ou codes de pose.
Le présent document couvre les corps de robinets conçus pour être raccordés à des tubes d’un diamètre extérieur nominal dn ≤ 400 mm.
Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Polietilen (PE) - 4. del: Ventili
General Information
- Status
- Withdrawn
- Publication Date
- 06-Jul-2021
- Withdrawal Date
- 14-Oct-2025
- Technical Committee
- CEN/TC 155 - Plastics piping systems and ducting systems
- Drafting Committee
- CEN/TC 155/WG 32 - Valves
- Current Stage
- 9960 - Withdrawal effective - Withdrawal
- Start Date
- 08-Oct-2025
- Completion Date
- 15-Oct-2025
Relations
- Effective Date
- 14-Jul-2021
- Effective Date
- 26-Apr-2023
Frequently Asked Questions
EN 1555-4:2021 is a standard published by the European Committee for Standardization (CEN). Its full title is "Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 4: Valves". This standard covers: This document specifies the characteristics of valves made from polyethylene (PE) for piping systems in the field of the supply of gaseous fuels. It is applicable to isolating unidirectional and bi-directional valves with spigot ends or electrofusion sockets intended to be fused with PE pipes or fittings conforming to EN 1555-2:2021 and EN 1555-3:2021 respectively. Valves made from materials other than PE, designed for the supply of gaseous fuels conforming to the relevant standards can be used in PE piping systems according to EN 1555 (all parts), provided that they have PE connections for butt fusion or electrofusion ends, including integrated material transition joints, conforming to EN 1555-3:2021. It also specifies the test parameters for the test methods referred to in this document. In conjunction with Parts 1, 2, 3 and 5 of EN 1555, it is applicable to PE valves, their joints and to joints with components of PE and other materials intended to be used under the following conditions: a) a maximum operating pressure, MOP, up to and including 10 bar1 at a reference temperature of 20 °C for design purposes; NOTE 1 For the purpose of this document and the references to EN ISO 82332, MOP is considered to be nominal pressure. b) an operating temperature between −20 °C to 40 °C. NOTE 2 For operating temperatures between 20 °C and 40 °C, derating coefficients are defined in EN 1555-5. EN 1555 (all parts) covers a range of maximum operating pressures and gives requirements concerning colours. NOTE 3 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes. This document covers valve bodies designed for connection with pipes with a nominal outside diameter dn ≤ 400 mm.
This document specifies the characteristics of valves made from polyethylene (PE) for piping systems in the field of the supply of gaseous fuels. It is applicable to isolating unidirectional and bi-directional valves with spigot ends or electrofusion sockets intended to be fused with PE pipes or fittings conforming to EN 1555-2:2021 and EN 1555-3:2021 respectively. Valves made from materials other than PE, designed for the supply of gaseous fuels conforming to the relevant standards can be used in PE piping systems according to EN 1555 (all parts), provided that they have PE connections for butt fusion or electrofusion ends, including integrated material transition joints, conforming to EN 1555-3:2021. It also specifies the test parameters for the test methods referred to in this document. In conjunction with Parts 1, 2, 3 and 5 of EN 1555, it is applicable to PE valves, their joints and to joints with components of PE and other materials intended to be used under the following conditions: a) a maximum operating pressure, MOP, up to and including 10 bar1 at a reference temperature of 20 °C for design purposes; NOTE 1 For the purpose of this document and the references to EN ISO 82332, MOP is considered to be nominal pressure. b) an operating temperature between −20 °C to 40 °C. NOTE 2 For operating temperatures between 20 °C and 40 °C, derating coefficients are defined in EN 1555-5. EN 1555 (all parts) covers a range of maximum operating pressures and gives requirements concerning colours. NOTE 3 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes. This document covers valve bodies designed for connection with pipes with a nominal outside diameter dn ≤ 400 mm.
EN 1555-4:2021 is classified under the following ICS (International Classification for Standards) categories: 23.060.99 - Other valves. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 1555-4:2021 has the following relationships with other standards: It is inter standard links to EN 1555-4:2011, EN 1555-4:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 1555-4:2021 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 CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2021
Nadomešča:
SIST EN 1555-4:2011
Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Polietilen
(PE) - 4. del: Ventili
Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 4:
Valves
Kunststoff-Rohrleitungssysteme für die Gasversorgung - Polyethylen (PE) - Teil 4:
Armaturen
Systèmes de canalisations en plastique pour la distribution de combustibles gazeux —
Polyéthylène (PE) — Partie 4 : Robinets
Ta slovenski standard je istoveten z: EN 1555-4:2021
ICS:
83.140.30 Polimerne cevi in fitingi za Plastics pipes and fittings for
snovi, ki niso tekočine non fluid use
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 1555-4
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2021
EUROPÄISCHE NORM
ICS 23.060.99 Supersedes EN 1555-4:2011
English Version
Plastics piping systems for the supply of gaseous fuels -
Polyethylene (PE) - Part 4: Valves
Systèmes de canalisations en plastique pour la Kunststoff-Rohrleitungssysteme für die Gasversorgung
distribution de combustibles gazeux - Polyéthylène - Polyethylen (PE) - Teil 4: Armaturen
(PE) - Partie 4 : Robinets
This European Standard was approved by CEN on 7 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 1555-4:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 9
3.1 General . 9
3.2 Terms relating to design . 9
4 Symbols and abbreviations . 10
5 Material . 10
5.1 Compound for valve body . 10
5.2 Material for non-polyethylene parts . 10
5.2.1 General . 10
5.2.2 Metal parts . 11
5.2.3 Sealing materials . 11
5.2.4 Greases and lubricants. 11
5.2.5 Assembly . 11
6 General characteristics . 11
6.1 Appearance of the valve . 11
6.2 Colour . 11
6.3 Design . 11
6.3.1 General . 11
6.3.2 Valve body . 11
6.3.3 Valve ends . 11
6.3.4 Operating device . 12
6.3.5 Seals . 12
7 Geometrical characteristics . 12
7.1 General . 12
7.2 Measurement of dimensions. 12
7.3 Dimensions of spigot ends for valves . 12
7.4 Dimensions of valves with electrofusion sockets . 12
7.5 Dimensions of the operating device . 12
8 Mechanical characteristics of assembled valves . 13
8.1 General . 13
8.2 Requirements . 13
8.2.1 General . 13
8.2.2 Air flow rate . 19
9 Physical characteristics . 19
9.1 Conditioning . 19
9.2 Requirements . 19
10 Performance requirements . 20
11 Technical file . 20
12 Marking . 21
12.1 General . 21
12.2 Minimum required marking . 21
12.3 Additional marking . 22
13 Delivery conditions . 22
Annex A (normative) Determination of the leaktightness of seat(s) and packing . 23
Annex B (normative) Test method for leaktightness and ease of operation after tensile loading 25
Bibliography. 27
European foreword
This document (EN 1555-4:2021) has been prepared by Technical Committee CEN/TC 155 “Plastics piping
systems and ducting systems”, the secretariat of which is held by NEN.
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 January 2022, and conflicting national standards shall be withdrawn at
the latest by January 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 supersedes EN 1555-4:2011.
In comparison with the previous version, the following technical modifications have been introduced:
— PE 100-RC type materials with enhanced resistance to slow crack growth have been added.
— Annex A in EN 1555-1:2021 now discusses the performance of this type of material and gives additional
information for non-conventional installation techniques.
— The diameter range for valves has been increased to 400 mm.
— An improved description of the leaktightness test is given.
— Annex B has been added to describe the leaktightness test after the tensile test, following the withdrawal
of ISO 10933.
— Test methods have been updated.
— A new method has been added for PE 100-RC materials.
This document has been prepared in liaison with Technical Committee CEN/TC 234 “Gas infrastructure”.
System Standards are based on the results of the work undertaken in ISO/TC 138 “Plastics pipes, fittings and
valves for the transport of fluids”, which is a Technical Committee of the International Organization for
Standardization (ISO).
They are supported by separate standards on test methods to which references are made throughout the
System Standard.
The System Standards are consistent with general standards on functional requirements and on recommended
practice for installation.
EN 1555 consists of the following parts:
— EN 1555-1, Plastics piping systems for the supply of gaseous fuels ― Polyethylene (PE) ― Part 1: General;
— EN 1555-2, Plastics piping systems for the supply of gaseous fuels ― Polyethylene (PE) ― Part 2: Pipes;
— EN 1555-3, Plastics piping systems for the supply of gaseous fuels ― Polyethylene (PE) ― Part 3: Fittings;
— EN 1555-4, Plastics piping systems for the supply of gaseous fuels ― Polyethylene (PE) ― Part 4: Valves
(this standard);
— EN 1555-5, Plastics piping systems for the supply of gaseous fuels ― Polyethylene (PE) ― Part 5: Fitness for
purpose of the system;
— CEN/TS 1555-7, Plastics piping systems for the supply of gaseous fuels ― Polyethylene (PE) ― Part 7: Guidance
for the assessment of conformity.
NOTE EN 12007-2 [1] prepared by CEN/TC 234 “Gas infrastructure” deals with the recommended practice for
installation of plastics pipes system in accordance with EN 1555 (all parts).
Any feedback and questions on this document should be directed to the users’ national standards body. A
complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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.
Introduction
This document, specifies the requirements for a piping system and its components made from polyethylene
(PE) and which is intended to be used for the supply of gaseous fuels.
Requirements and test methods for material and components, other than valves, are specified in
EN 1555-1:2021, EN 1555-2:2021 and EN 1555-3:2021.
Characteristics for fitness for purpose are covered in EN 1555-5:2021. CEN/TS 1555-7 [2] gives guidance for
assessment of conformity. Recommended practice for installation is given in EN 12007-2:2012 [1] prepared by
CEN/TC 234.
This part of EN 1555 covers the characteristics of valves.
1 Scope
This document specifies the characteristics of valves made from polyethylene (PE) for piping systems in the
field of the supply of gaseous fuels.
It is applicable to isolating unidirectional and bi-directional valves with spigot ends or electrofusion sockets
intended to be fused with PE pipes or fittings conforming to EN 1555-2:2021 and EN 1555-3:2021 respectively.
Valves made from materials other than PE, designed for the supply of gaseous fuels conforming to the relevant
standards can be used in PE piping systems according to EN 1555 (all parts), provided that they have PE
connections for butt fusion or electrofusion ends, including integrated material transition joints, conforming to
EN 1555-3:2021.
It also specifies the test parameters for the test methods referred to in this document.
In conjunction with Parts 1, 2, 3 and 5 of EN 1555, it is applicable to PE valves, their joints and to joints with
components of PE and other materials intended to be used under the following conditions:
a) a maximum operating pressure, MOP, up to and including 10 bar at a reference temperature of 20 °C for
design purposes;
NOTE 1 For the purpose of this document and the references to EN ISO 8233 , MOP is considered to be nominal
pressure.
b) an operating temperature between −20 °C to 40 °C.
NOTE 2 For operating temperatures between 20 °C and 40 °C, derating coefficients are defined in EN 1555-5.
EN 1555 (all parts) covers a range of maximum operating pressures and gives requirements concerning
colours.
NOTE 3 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects,
taking into account their particular requirements and any relevant national regulations and installation practices or codes.
This document covers valve bodies designed for connection with pipes with a nominal outside diameter
d ≤ 400 mm.
n
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.
EN 682, Elastomeric Seals - Materials requirements for seals used in pipes and fittings carrying gas and
hydrocarbon fluids
EN 736-1:2018, Valves - Terminology - Part 1: Definition of types of valves
EN 736-2:2016, Valves - Terminology - Part 2: Definition of components of valves
EN 736-3:2008, Valves - Terminology - Part 3: Definition of terms
EN 1555-1:2021, Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 1: General
EN 1555-2:2021, Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 2: Pipes
1 5 2
1 bar = 0,1 MPa =10 Pa; 1 MPa = 1 N/mm .
EN 1555-3:2021, Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings
EN 1555-5:2021, Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 5: Fitness for
purpose of the system
EN 1680, Plastics piping systems - Valves for polyethylene (PE) piping systems - Test method for leaktightness
under and after bending applied to the operating mechanisms
EN 1704, Plastics piping systems - Thermoplastics valves - Test method for the integrity of a valve after
temperature cycling under bending
EN 1705, Plastics piping systems - Thermoplastics valves - Test method for the integrity of a valve after an external
blow
EN 12100, Plastics piping systems - Polyethylene (PE) valves - Test method for resistance to bending between
supports
EN 12119, Plastics piping systems - Polyethylene (PE) valves - Test method for resistance to thermal cycling
EN ISO 1133-1, Plastics - Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of
thermoplastics - Part 1: Standard method (ISO 1133-1)
EN ISO 1167-1:2006, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids - Determination of
the resistance to internal pressure - Part 1: General method (ISO 1167-1:2006)
EN ISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids - Determination of the
resistance to internal pressure - Part 4: Preparation of assemblies (ISO 1167-4)
EN ISO 3127:2017, Thermoplastics pipes - Determination of resistance to external blows - Round-the-clock
method (ISO 3127:1994)
EN ISO 3126, Plastics piping systems - Plastics components - Determination of dimensions (ISO 3126)
EN ISO 8233 , Thermoplastic valves - Torque - Test method (ISO/FDIS 8233)
EN ISO 11357-6, Plastics - Differential scanning calorimetry (DSC) - Part 6: Determination of oxidation induction
time (isothermal OIT) and oxidation induction temperature (dynamic OIT) (ISO 11357-6)
EN ISO 17778, Plastics piping systems - Fittings, valves and ancillaries - Determination of gaseous flow
rate/pressure drop relationships (ISO 17778)
Under preparation. Stage at the time of publication: FprEN ISO 8233:2021.
3 Terms and definitions
For the purposes of this document, the terms and definitions, symbols and abbreviations given in
EN 1555-1:2021, EN 736-1:2018, EN 736-2:2016 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1 General
3.1.1
external leaktightness
leaktightness of the valve body enveloping the space containing the gas, with respect to the atmosphere
3.1.2
internal leaktightness
leaktightness between the inlet and the outlet of the valve, with the valve in the closed position
3.1.3
leakage
emission of gas from a valve body, or any component of a valve
3.1.4
valve body
main part of a valve which consists of an operating stop system and contains the obturator, seat(s), stem(s) or
shaft(s) and packing seals, and provides the terminal ends for connection to the PE pipe/fittings as applicable
3.1.5
operating device
part of a valve for connection with the operating key which allows the opening and the closing of the valve
3.2 Terms relating to design
3.2.1
isolating valve
valve intended for use only in the closed or fully open position
[SOURCE: EN 736-1:2018]
3.2.2
full bore valve
valve with a flow section equal to or greater than 80 % of the section corresponding to the nominal inside
diameter of the body end port
[SOURCE: EN 736-3:2008]
3.2.3
clearway valve
valve designed to have an unobstructed flow way, which allows for the passage of a theoretical sphere with a
diameter that is not less than the nominal inside diameter of the body end port
[SOURCE: EN 736-3:2008]
3.2.4
reduced bore valve
valve with a flow section equal to or greater than 36 % of the section corresponding to the nominal inside
diameter of the body end port and which does not correspond to the full bore valve
[SOURCE: EN 736-3:2008]
4 Symbols and abbreviations
For the purpose of this document the symbols and abbreviations given in EN 1555-1 apply.
5 Material
5.1 Compound for valve body
The PE compound from which the valve body with spigot or electrofusion socket is made shall conform to
EN 1555-1:2021.
The PE components of the valve shall be made only from virgin material conforming to EN 1555-1:2021.
5.2 Material for non-polyethylene parts
5.2.1 General
All components shall conform to the relevant EN standard(s). Alternative standards may be applied in cases
where the suitable EN standard(s) do not exist. In all cases, fitness for purpose of the components shall be
demonstrated.
The materials and the constituent elements used in making the valve (including elastomers, greases and any
metal parts as may be used) shall be as resistant to the external and internal environments as the other
elements of the piping system, and shall have an expected lifetime under the following conditions at least equal
to that of the PE pipes conforming to EN 1555-2:2021, with which they are intended to be used:
a) during storage;
b) under the effect of the gas conveyed therein;
c) with respect to the service environment and operating conditions.
The requirements for the level of material performance of non-polyethylene parts shall be at least as stringent
as that of the PE compound for the piping system. Reworked materials shall not be used for stress bearing
polymeric parts.
Other materials used in valves in contact with the PE pipe shall not adversely affect pipe performance or initiate
stress cracking.
The valve manufacturer shall ensure that any transition joint between polyethylene and non-polyethylene parts
and the valve body fulfil the requirements of EN 1555-3:2021.
5.2.2 Metal parts
All metal parts susceptible to corrosion shall be adequately protected, providing this is necessary for the
durability and function of the system.
When dissimilar metallic materials are used which may be in contact with moisture, steps shall be taken to
avoid the possibility of galvanic corrosion.
5.2.3 Sealing materials
Elastomeric seals shall conform to EN 682.
If other sealing materials are used they need to be proven for gas supply systems.
5.2.4 Greases and lubricants
Greases or lubricants shall not exude onto fusion areas, and shall not affect the long term performance of the
valve materials.
5.2.5 Assembly
Ancillary components of valves shall be assembled according to manufacturer’s procedures and any component
used in the assembly shall not prevent conformity of the valve to this document.
6 General characteristics
6.1 Appearance of the valve
When viewed without magnification, the internal and external surfaces of valves shall be smooth, clean and
shall have no scoring, cavities or other surface defects to an extent that would prevent conformity to this
document.
No component of the valve shall show any signs of damage, scratches, pitting, bubbles, blisters, inclusions or
cracks to an extent that would prevent conformity of the valves to the requirements of this document.
6.2 Colour
The colour of the PE parts of valves shall be either black, yellow or orange.
6.3 Design
6.3.1 General
The valve shall be designed to provide the fluid flow passageway and the body ends.
The pressure resistance of the valve shall
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SIST EN 1555-4:2021은 가스 연료 공급을 위한 플라스틱 배관 시스템에 관한 국제 표준의 일환으로, 폴리에틸렌(PE)으로 제작된 밸브의 특성을 규정합니다. 이 문서의 적용 범위는 PE 파이프 또는 피팅과 용접될 예정인 일 방향 및 양 방향 차단 밸브를 포함하며, 이는 EN 1555-2:2021 및 EN 1555-3:2021에 적합해야 합니다. 이 표준의 주요 강점 중 하나는 PE 재료 외의 다른 재료로 제작된 밸브를 PE 배관 시스템에 사용할 수 있게끔 규정하고 있다는 점입니다. 이러한 밸브는 접합 끝부분이 PE 연결부를 갖출 경우에만 적용됩니다. 이는 다양한 재료의 밸브 사용을 허용하여 시스템 설계의 유연성을 높이는 중요한 요소입니다. 또한, PE와 다른 재료가 결합된 조인트도 포괄적으로 다루고 있어 실용적인 응용이 가능합니다. 표준은 최대 작동 압력(10 bar)과 작동 온도 범위(−20 °C에서 40 °C)와 같은 중요한 설계 기준을 명시하고 있습니다. 이는 사용자가 특정 요구사항과 국가 규정 및 설치 관행을 고려하여 적절한 선택을 할 수 있도록 돕습니다. 따라서, 이 표준은 가스 연료 공급에 필요한 안전하고 신뢰할 수 있는 배관 시스템 구축을 위한 필수적인 기초를 제공합니다. 마지막으로, 밸브의 시험 방법과 관련된 시험 파라미터를 명시하여, 기술적 신뢰성을 확보하고 있습니다. SIST EN 1555-4:2021은 PE 밸브 및 관련 조인트의 설계를 위한 권위 있는 지침으로, 배관 시스템의 안전성과 기능성을 보장하는데 큰 도움이 됩니다.
The standard EN 1555-4:2021 serves a critical role in the field of gaseous fuel supply, specifically focusing on the characteristics and specifications of valves made from polyethylene (PE). Its scope is well-defined, targeting isolating unidirectional and bi-directional valves equipped with spigot ends or electrofusion sockets intended for fusion with PE pipes or fittings as outlined in related standards EN 1555-2:2021 and EN 1555-3:2021. This clear delineation ensures that stakeholders can effectively ascertain the suitability of valves for their specific applications, thus enhancing safety and operational reliability in the supply of gaseous fuels. One of the notable strengths of EN 1555-4:2021 lies in its comprehensive approach to integration with other parts of the EN 1555 standard series. By facilitating the use of valves made from materials other than PE, the standard significantly expands operational flexibility. It permits these valves to be used in PE piping systems, provided they adhere to specified requirements, such as integrating PE connections for butt fusion or electrofusion ends. This adaptability is crucial for industries that may require diverse materials while maintaining adherence to stringent safety and quality specifications. Furthermore, the standard specifies test parameters and methods that must be followed to ensure that the valves meet the necessary performance criteria. This attention to testing enhances the reliability of PE valves and contributes to the overall integrity of the piping systems within which they are used. The operational parameters defined by the standard are also relevant. With a maximum operating pressure (MOP) of 10 bar at a reference temperature of 20 °C, and a temperature range of -20 °C to 40 °C, EN 1555-4:2021 caters to a wide variety of environments under which gaseous fuel piping systems might operate. The inclusion of derating coefficients for higher temperatures is a thoughtful addition, allowing for better risk management in thermal variations. Additionally, the coverage of valve bodies designed for pipes with a nominal outside diameter dn ≤ 400 mm showcases the standard's broad applicability across multiple installation scenarios. This detail not only enhances its relevance but also makes it a valuable resource for engineers and specifiers tasked with designing safe and efficient gas supply networks. Overall, EN 1555-4:2021 represents a significant advancement in the standardization of valve characteristics for gaseous fuel supply systems. Its structured approach, clear interoperability with related standards, and comprehensive testing guidelines underline its importance in promoting safe and effective use of PE piping systems for gaseous fuels.
Le document SIST EN 1555-4:2021 définit les caractéristiques des vannes en polyéthylène (PE) destinées aux systèmes de tuyauteries pour la fourniture de combustibles gazeux. Son champ d'application est au cœur des systèmes de distribution de gaz, fournissant des spécifications précises pour les vannes isolantes unidirectionnelles et bidirectionnelles avec des extrémités à enficher ou des douilles par électrofusion. L'un des points forts de cette norme réside dans la clarté de ses définitions et dans son approche intégrative. Elle permet non seulement d'utiliser des vannes en PE mais aussi des vannes fabriquées à partir de matériaux différents, à condition qu'elles soient munies de connexions en PE adaptées. Ce critère offre une flexibilité appréciable pour les concepteurs et les installateurs, garantissant que les systèmes de tuyauterie restent fonctionnels tout en respectant les normes de sécurité et de performance. La norme spécifie également les paramètres d'essai pour les méthodes de test, ce qui est essentiel pour assurer que les vannes répondent à des conditions d'exploitation rigoureuses. Cela comprend des pressions de service maximales allant jusqu'à 10 bars à une température de référence de 20 °C, ainsi qu'un éventail de températures de fonctionnement de -20 °C à 40 °C. En intégrant des coefficients de réduction de capacité pour des températures spécifiques, la norme assure une utilisation sûre et efficace des vannes sous diverses conditions opérationnelles. En ce qui concerne le dimensionnement, le document reprend la conception des corps de vannes destinés à être raccordés à des tuyaux d'un diamètre nominal extérieur jusqu'à 400 mm. Cela montre une approche pragmatique et adaptée aux besoins du marché, conjuguant performance et praticité. Dans l'ensemble, SIST EN 1555-4:2021 est une norme essentielle pour les professionnels du secteur de la tuyauterie, apportant des solutions standardisées et fiables pour la fourniture de combustibles gazeux. Sa pertinence est d'autant plus renforcée qu'elle s'inscrit dans un cadre standardisé, en lien avec les autres parties de la norme EN 1555, garantissant ainsi une cohérence et une intégration optimale dans les installations de distribution de gaz.
SIST EN 1555-4:2021は、ガス燃料供給用のプラスチック配管システムに関する標準の重要な一部であり、特にポリオレフィンであるポリエチレン（PE）製のバルブに焦点を当てています。この文書は、PE配管システムにおけるバルブの特性を明確に定義しており、ガス燃料供給に関連する用途においてその重要性が際立っています。 主な強みとして、SIST EN 1555-4は、単方向および双方向の遮断バルブに関する明確な仕様を提供し、PEパイプやフィッティングとの接続に関する詳細を取り扱っています。このため、設計者や技術者がバルブを選択する際の指針を与え、相互運用性を確保します。また、この標準は、何らかの材料を使用した場合でも、適切なPE接続を持つバルブの利用を許可することで、多様な材料に対する柔軟性を持たせています。 さらに、試験方法や試験パラメータに関する技術的な情報が明記されているため、製品の信頼性と品質を確認するための基準が設けられています。これは、工業界での適用性を高める要因としています。操作圧力や温度に関する具体的な基準も含まれており、特定の条件下での性能を保証します。 EN 1555の他の部品1、2、3、5との関連により、PEバルブ、接合部、および他の材料のコンポーネントを含む接合部の一貫した適用が可能であることも、この標準の大きな魅力です。これは、様々な環境条件に対応可能な、強力なバルブ設計を可能にします。 したがって、SIST EN 1555-4:2021は、PE製のバルブに対する他の規格との相互関係を考慮しながら、エネルギー供給およびインフラの安全性と効率性を高めるための貴重な基準であると言えます。
Die Norm EN 1555-4:2021 beschreibt die Merkmale von Ventilen aus Polyethylen (PE) für Rohrleitungssysteme im Bereich der Versorgung mit gasförmigen Brennstoffen. Ihr Geltungsbereich umfasst sowohl isolierende unidirektionale als auch bidirektionale Ventile, die für die Verbindung mit PE-Rohren oder -Fittings gemäß EN 1555-2:2021 und EN 1555-3:2021 ausgelegt sind. Diese Standardisierung ist besonders relevant, da sie die Verwendung von Komponenten aus anderen Materialien in PE-Rohrleitungssystemen erlaubt, sofern diese die notwendigen Anforderungen für PE-Verbindungen erfüllen. Das gewährleistet eine flexible Integration in bestehende Systeme. Ein wesentlicher Vorteil der Norm ist die klare Definition der Testerfordernisse, die sicherstellt, dass die Ventile unter festgelegten Bedingungen, wie einem maximalen Betriebsdruck von bis zu 10 bar und Temperaturbereichen zwischen −20 °C und 40 °C, zuverlässig funktionieren. Darüber hinaus bezieht sich die Norm auf weitere Teile von EN 1555, was ihre Anwendung und Relevanz in der Branche stärkt. Ein weiterer Pluspunkt der EN 1555-4:2021 ist, dass sie die direkte Verbindung zu weiteren relevanten Normen und Vorschriften herstellt und somit die Entscheidungsfindung für Planer und Einkäufer erleichtert. Die Verantwortung für die Auswahl passender Materialien und Farben liegt zwar beim Käufer oder Planer, jedoch bietet die Norm klare Richtlinien, die die Umsetzung von nationalen Vorschriften und Installationspraktiken unterstützen. Die Norm konzentriert sich dabei vor allem auf Ventilgehäuse, die für Rohre mit einem Nennaußendurchmesser von dn ≤ 400 mm ausgelegt sind. Dies stellt sicher, dass die Norm auch in einem breiten Anwendungsspektrum von Rohrleitungssystemen für gasförmige Brennstoffe effektiv eingehalten werden kann. Zusammengefasst folgt die EN 1555-4:2021 dem Ziel, die Sicherheit und Effizienz der Verwendung von PE-Ventilen in entsprechenden Anwendungen signifikant zu erhöhen und trägt somit zur Standardisierung in der Branche bei.
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