EN 12201-4:2024
(Main)Plastics piping systems for water supply, and for drains and sewers under pressure - Polyethylene (PE) - Part 4: Valves for water supply systems
General Information
- Abstract
This document specifies the characteristics of valves or valve bodies made from polyethylene (PE) for buried and above ground applications, intended for the conveyance of water for human consumption, raw water prior to treatment, drains and sewers under pressure, vacuum sewer systems, and water for other purposes, with the exception of industrial applications.
NOTE 1 For PE components intended for the conveyance of water for human consumption and raw water prior to treatment, attention is drawn to 6.4. Components manufactured for water for other purposes, drains and sewers, and vacuum systems are possibly not suitable for water supply for human consumption.
NOTE 2 Industrial application is covered by EN ISO 15494 [2].
The intended use includes sea outfalls, laid in water and pipes suspended below bridges.
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 12201-2 and EN 12201-3 respectively.
Valves made from materials other than PE, conforming to the relevant standards can be used in PE piping systems according to EN 12201, provided that they have PE connections for butt fusion or electrofusion ends, conforming to EN 12201-3, or material transition joints (e.g. flanged joints).
NOTE 3 For valves or valve bodies intended for drains and sewers, additional information is given in Clause 9.
It also specifies the test parameters for the test methods referred to in this document.
In conjunction with EN 12201-1, EN 12201 2, EN 12201 3 and EN 12201 5, this document is applicable to PE pipes, fittings and valves, their joints and joints with components of PE and other materials intended to be used under the following conditions:
a) allowable operating pressure, PFA, up to 25 bar ;
b) an operating temperature of 20 °C as a reference temperature.
NOTE 4 For applications operating at constant temperature greater than 20 °C and up to 50 °C, see EN 12201-1:2024, Annex A.
The EN 12201 series covers a range of allowable operating pressures and gives requirements concerning colours and additives.
NOTE 5 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 guidance or regulations and installation practices or codes.
This document covers valves for pipes with a nominal outside diameter dn ≤ 400 mm.
- Status
- Published
- Publication Date
- 30-Jan-2024
- Technical Committee
- CEN/TC 155 - Plastics piping systems and ducting systems
- Drafting Committee
- CEN/TC 155/WG 32 - Valves
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 31-Jan-2024
- Due Date
- 15-Mar-2023
- Completion Date
- 31-Jan-2024
Overview
EN 12201-4:2024 is the CEN European Standard that defines requirements for polyethylene (PE) valves used in water supply systems, drains and sewers under pressure, and vacuum sewer systems. It covers PE valve bodies for buried and above-ground installations (including sea outfalls and pipes suspended below bridges) and applies to isolating unidirectional and bi-directional valves with spigot ends or electrofusion sockets intended to fuse with PE pipes and fittings. The standard extends the valve diameter range to dn ≤ 400 mm and applies to systems with an allowable operating pressure (PFA) of up to 25 bar at a reference temperature of 20 °C.
Key topics and technical requirements
- Scope & applications: Valves for potable water, raw water prior to treatment, drains/sewers under pressure, vacuum sewer systems and other non-industrial uses. Industrial applications are excluded (see EN ISO 15494).
- Materials: Requirements for PE compounds for valve bodies and for non-PE parts (metal components, seals, greases, assembly). Includes guidance on PE 100‑RC materials with enhanced slow crack growth resistance.
- Connections: Specifications for spigot ends and electrofusion sockets compatible with EN 12201-2/3 pipes and fittings; non‑PE valves may be used if provided with PE fusion connections or appropriate transition joints (e.g., flanged).
- Geometric & mechanical characteristics: Dimensional rules for sockets/spigots, operating device dimensions, valve body design and performance under mechanical load.
- Performance & physical tests: Test parameters and methods including leaktightness of seats and packing (Annex A) and leaktightness/ease of operation after tensile loading (Annex B). Test updates include methods for PE 100‑RC.
- Water quality considerations: Clause 6.4 highlights requirements and national regulations for products intended for contact with drinking water.
- Marking, technical file & delivery: Requirements for product marking, documentation and delivery conditions.
Practical applications
- Designing and specifying PE piping systems for municipal water supply, pressure sewer mains and vacuum sewer installations.
- Selecting valves for buried distribution mains, service connections, sea outfalls or bridge-suspended pipelines.
- Manufacturing and testing PE valves to meet CEN requirements for safety, durability and fusion compatibility.
Who should use this standard
- Valve and piping manufacturers, R&D and quality labs
- Water utilities and network designers
- Civil and pipeline engineers, specifiers and procurement teams
- Installers and fusion technicians
- Regulatory bodies and conformity assessors
Related standards
- EN 12201-1, -2, -3, -5 (system parts covering general, pipes, fittings, fitness for purpose)
- CEN/TS 12201-7 (guidance for assessment of conformity)
- EN ISO 15494 (industrial applications)
Keywords: EN 12201-4:2024, polyethylene valves, PE valves, electrofusion sockets, spigot ends, PE 100-RC, leaktightness test, water supply valves, buried water systems.
Relations
- Effective Date
- 19-Jan-2023
- Effective Date
- 25-Aug-2026
- Effective Date
- 25-Aug-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
EN 12201-4:2024 is a standard published by the European Committee for Standardization (CEN). Its full title is "Plastics piping systems for water supply, and for drains and sewers under pressure - Polyethylene (PE) - Part 4: Valves for water supply systems". This standard covers: This document specifies the characteristics of valves or valve bodies made from polyethylene (PE) for buried and above ground applications, intended for the conveyance of water for human consumption, raw water prior to treatment, drains and sewers under pressure, vacuum sewer systems, and water for other purposes, with the exception of industrial applications. NOTE 1 For PE components intended for the conveyance of water for human consumption and raw water prior to treatment, attention is drawn to 6.4. Components manufactured for water for other purposes, drains and sewers, and vacuum systems are possibly not suitable for water supply for human consumption. NOTE 2 Industrial application is covered by EN ISO 15494 [2]. The intended use includes sea outfalls, laid in water and pipes suspended below bridges. 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 12201-2 and EN 12201-3 respectively. Valves made from materials other than PE, conforming to the relevant standards can be used in PE piping systems according to EN 12201, provided that they have PE connections for butt fusion or electrofusion ends, conforming to EN 12201-3, or material transition joints (e.g. flanged joints). NOTE 3 For valves or valve bodies intended for drains and sewers, additional information is given in Clause 9. It also specifies the test parameters for the test methods referred to in this document. In conjunction with EN 12201-1, EN 12201 2, EN 12201 3 and EN 12201 5, this document is applicable to PE pipes, fittings and valves, their joints and joints with components of PE and other materials intended to be used under the following conditions: a) allowable operating pressure, PFA, up to 25 bar ; b) an operating temperature of 20 °C as a reference temperature. NOTE 4 For applications operating at constant temperature greater than 20 °C and up to 50 °C, see EN 12201-1:2024, Annex A. The EN 12201 series covers a range of allowable operating pressures and gives requirements concerning colours and additives. NOTE 5 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 guidance or regulations and installation practices or codes. This document covers valves for pipes with a nominal outside diameter dn ≤ 400 mm.
This document specifies the characteristics of valves or valve bodies made from polyethylene (PE) for buried and above ground applications, intended for the conveyance of water for human consumption, raw water prior to treatment, drains and sewers under pressure, vacuum sewer systems, and water for other purposes, with the exception of industrial applications. NOTE 1 For PE components intended for the conveyance of water for human consumption and raw water prior to treatment, attention is drawn to 6.4. Components manufactured for water for other purposes, drains and sewers, and vacuum systems are possibly not suitable for water supply for human consumption. NOTE 2 Industrial application is covered by EN ISO 15494 [2]. The intended use includes sea outfalls, laid in water and pipes suspended below bridges. 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 12201-2 and EN 12201-3 respectively. Valves made from materials other than PE, conforming to the relevant standards can be used in PE piping systems according to EN 12201, provided that they have PE connections for butt fusion or electrofusion ends, conforming to EN 12201-3, or material transition joints (e.g. flanged joints). NOTE 3 For valves or valve bodies intended for drains and sewers, additional information is given in Clause 9. It also specifies the test parameters for the test methods referred to in this document. In conjunction with EN 12201-1, EN 12201 2, EN 12201 3 and EN 12201 5, this document is applicable to PE pipes, fittings and valves, their joints and joints with components of PE and other materials intended to be used under the following conditions: a) allowable operating pressure, PFA, up to 25 bar ; b) an operating temperature of 20 °C as a reference temperature. NOTE 4 For applications operating at constant temperature greater than 20 °C and up to 50 °C, see EN 12201-1:2024, Annex A. The EN 12201 series covers a range of allowable operating pressures and gives requirements concerning colours and additives. NOTE 5 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 guidance or regulations and installation practices or codes. This document covers valves for pipes with a nominal outside diameter dn ≤ 400 mm.
EN 12201-4:2024 is classified under the following ICS (International Classification for Standards) categories: 23.040.20 - Plastics pipes; 23.060.01 - Valves in general. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 12201-4:2024 has the following relationships with other standards: It is inter standard links to EN 12201-4:2012, ISO 8233:1988, ISO 18488:2015, ISO 161-1:2018, EN 12201-5:2024, EN ISO 1167-1:2006, EN ISO 18243:2019, EN ISO 3127:2017, EN 1705:2025, EN 736-1:2018, EN ISO 3126:2005, EN ISO 1167-4:2007, EN ISO 11357-6:2025, EN 12201-3:2024, EN 1680:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 12201-4:2024 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2024
Nadomešča:
SIST EN 12201-4:2012
Cevni sistemi iz polimernih materialov za oskrbo z vodo ter za odvodnjavanje in
kanalizacijo pod tlakom - Polietilen (PE) - 4. del: Ventili za oskrbo z vodo
Plastics piping systems for water supply, and for drains and sewers under pressure -
Polyethylene (PE) - Part 4: Valves for water supply systems
Kunststoff-Rohrleitungssysteme für die Wasserversorgung und für Entwässerungs- und
Abwasserdruckleitungen - Polyethylen (PE) - Teil 4: Armaturen für
Wasserversorgungssysteme
Systèmes de canalisations en plastique pour l’alimentation en eau et pour les
branchements et les collecteurs d’assainissement avec pression - Polyéthylène (PE) -
Partie 4 : Robinets pour les systèmes d’alimentation en eau
Ta slovenski standard je istoveten z: EN 12201-4:2024
ICS:
23.060.01 Ventili na splošno Valves in general
91.140.60 Sistemi za oskrbo z vodo Water supply systems
93.030 Zunanji sistemi za odpadno External sewage systems
vodo
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 12201-4
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2024
EUROPÄISCHE NORM
ICS 23.040.20; 23.060.01 Supersedes EN 12201-4:2012
English Version
Plastics piping systems for water supply, and for drains
and sewers under pressure - Polyethylene (PE) - Part 4:
Valves for water supply systems
Systèmes de canalisations en plastique pour Kunststoff-Rohrleitungssysteme für die
l'alimentation en eau et pour les branchements et les Wasserversorgung und für Entwässerungs- und
collecteurs d'assainissement avec pression - Abwasserdruckleitungen - Polyethylen (PE) - Teil 4:
Polyéthylène (PE) - Partie 4 : Robinets pour les Armaturen für Wasserversorgungssysteme
systèmes d'alimentation en eau
This European Standard was approved by CEN on 10 December 2023.
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, Türkiye 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12201-4:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 6
1 Scope . 7
2 Normative references . 8
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 PE compound for the 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 .12
6.3.4 Operating device .12
6.3.5 Seals .12
6.4 Effect on water quality .12
7 Geometric 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 .13
8 Mechanical characteristics for assembled valves .13
8.1 General.13
8.2 Requirements .13
8.2.1 General.13
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 of valves .21
12.3 Additional Marking . 21
13 Delivery Conditions . 22
Annex A (normative) Determination of the leaktightness of seats and packing . 23
A.1 General . 23
A.2 Test piece . 23
A.3 Procedure . 23
A.4 Test report . 24
Annex B (normative) Test method for leaktightness and ease of operation after tensile
loading . 25
B.1 Apparatus . 25
B.2 Test piece . 25
B.3 Conditions . 25
B.4 Procedure . 25
B.5 Test report . 26
Bibliography . 27
European foreword
This document (EN 12201-4:2024) 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 July 2024, and conflicting national standards shall be
withdrawn at the latest by July 2024.
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 12201-4:2012.
System Standards are based on the results of the work being 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 12201 consists of the following parts:
— EN 12201-1, Plastics piping systems for water supply, and for drains and sewers under pressure —
Polyethylene (PE) — Part 1: General;
— EN 12201-2, Plastics piping systems for water supply, and for drains and sewers under pressure —
Polyethylene (PE) — Part 2: Pipes;
— EN 12201-3, Plastics piping systems for water supply, and for drains and sewers under pressure —
Polyethylene (PE) — Part 3: Fittings;
— EN 12201-4, Plastics piping systems for water supply, and for drains and sewers under pressure —
Polyethylene (PE) — Part 4: Valves for water supply systems (this document);
— EN 12201-5, Plastics piping systems for water supply, and for drains and sewers under pressure —
Polyethylene (PE) — Part 5: Fitness for purpose of the system.
In addition, the following document provides guidance on the assessment of conformity:
— CEN/TS 12201-7, Plastics piping systems for water supply, and for drainage and sewerage under
pressure — Polyethylene (PE) — Part 7: Guidance for the assessment of conformity.
The revision of this System Standard has been carried out principally to add the PE 100-RC type materials
with enhanced resistance to slow crack growth. EN 12201-1:2024, Annex C 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
withdrawal of ISO 10933. In addition, test methods have been updated and a new method has been added
for PE 100-RC materials.
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, Türkiye and the United
Kingdom.
Introduction
This document, known as the System Standard, specifies the requirements for a piping system and its
components made from polyethylene (PE). The piping system is intended to be used for water supply
intended for human consumption, including the conveyance of raw water prior to treatment, drains and
sewers under pressure, vacuum sewer systems, and water for other purposes.
In respect of potential adverse effects on the quality of water intended for human consumption, caused
by the product covered by the EN 12201 series:
— this document provides no information as to whether the products may be used without restriction
in any of the Member States of the EU or EFTA;
NOTE Attention is drawn to the presence of national regulations and testing arrangements in relation to
products intended for use in water supply to ensure fitness for contact with drinking water.
Requirements and test methods for material and components, other than valves, are specified in
EN 12201-1, EN 12201-2 and EN 12201-3.
Characteristics for fitness of purpose are covered in EN 12201-5. CEN/TS 12201-7 [1] gives guidance for
the assessment of conformity.
This part of EN 12201 covers the characteristics of valves.
1 Scope
This document specifies the characteristics of valves or valve bodies made from polyethylene (PE) for
buried and above ground applications, intended for the conveyance of water for human consumption, raw
water prior to treatment, drains and sewers under pressure, vacuum sewer systems, and water for other
purposes, with the exception of industrial applications.
NOTE 1 For PE components intended for the conveyance of water for human consumption and raw water prior
to treatment, attention is drawn to 6.4. Components manufactured for water for other purposes, drains and sewers,
and vacuum systems are possibly not suitable for water supply for human consumption.
NOTE 2 Industrial application is covered by EN ISO 15494 [2].
The intended use includes sea outfalls, laid in water and pipes suspended below bridges.
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 12201-2 and EN 12201-3
respectively.
Valves made from materials other than PE, conforming to the relevant standards can be used in PE piping
systems according to EN 12201, provided that they have PE connections for butt fusion or electrofusion
ends, conforming to EN 12201-3, or material transition joints (e.g. flanged joints).
NOTE 3 For valves or valve bodies intended for drains and sewers, additional information is given in Clause 9.
It also specifies the test parameters for the test methods referred to in this document.
In conjunction with EN 12201-1, EN 12201-2, EN 12201-3 and EN 12201-5, this document is applicable
to PE pipes, fittings and valves, their joints and joints with components of PE and other materials intended
to be used under the following conditions:
a) allowable operating pressure, PFA, up to 25 bar ;
b) an operating temperature of 20 °C as a reference temperature.
NOTE 4 For applications operating at constant temperature greater than 20 °C and up to 50 °C, see EN 12201-
1:2024, Annex A.
The EN 12201 series covers a range of allowable operating pressures and gives requirements concerning
colours and additives.
NOTE 5 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 guidance or regulations and
installation practices or codes.
This document covers valves for pipes with a nominal outside diameter d ≤ 400 mm.
n
1 5 2
1 bar = 0,1 MPa = 10 Pa; 1 MPa = 1 N/mm .
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 681-1, Elastomeric seals — Materials requirements for pipe joint seals used in water and drainage
applications — Part 1: Vulcanized rubber
EN 736-1, Valves — Terminology — Part 1: Definition of types of valves
EN 736-2, Valves — Terminology — Part 2: Definition of components of valves
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 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 12201-1, Plastics piping systems for water supply, and for drains and sewers under pressure —
Polyethylene (PE) — Part 1: General
EN 12201-2, Plastics piping systems for water supply, and for drains and sewers under pressure —
Polyethylene (PE) — Part 2: Pipes
EN 12201-3:2024, Plastics piping systems for water supply, and for drains and sewers under pressure —
Polyethylene (PE) — Part 3: Fittings
EN 12201-5, Plastics piping systems for water supply, and for drains and sewers under pressure —
Polyethylene (PE) — Part 5: Fitness for purpose of the system
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, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination
of the resistance to internal pressure — Part 1: General method (ISO 1167-1)
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 3126, Plastics piping systems — Plastics components — Determination of dimensions (ISO 3126)
EN ISO 3127, Thermoplastics pipes — Determination of resistance to external blows — Round-the-clock
method (ISO 3127)
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)
ISO 161-1, Thermoplastics pipes for the conveyance of fluids — Nominal outside diameters and nominal
pressures — Part 1: Metric series
ISO 8233, Thermoplastic valves — Torque — Test method
ISO 18488, Polyethylene (PE) materials for piping systems — Determination of Strain Hardening Modulus
in relation to slow crack growth — Test method
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12201-1, EN 736-1 and
EN 736-2 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1 General
3.1.1
external leaktightness
leaktightness of the body enveloping the space containing the water, 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
seepage of water from the valve body, or any component of the 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 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 purposes of this document, the symbols and abbreviations given in EN 12201-1 apply.
5 Material
5.1 PE compound for the valve body
The PE compound from which the body of the valve, with spigot end or electrofusion socket is made shall
conform to EN 12201-1.
The PE components of the valve shall only be made from virgin material conforming to EN 12201-1.
5.2 Material for non-polyethylene parts
5.2.1 General
All components shall conform to the relevant European Standard(s). Alternative standards may be
applied in cases where suitable European Standard(s) do not exist. Fitness for purpose of the system of
the components shall be demonstrated.
The materials and the constituent elements used in making the valves (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 12201-2, with which they are intended to be used:
a) during storage;
b) under the effect of the water 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 the 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 shall fulfil the requirements of EN 12201-3.
Metal valve bodies for PE piping systems up to 25 bars should conform to the relevant standard of
CEN/TC 69 “Industrial valves”.
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 681-1.
If other sealing materials are used they need to be proven for water supply and sewerage systems.
5.2.4 Greases and lubricants
Greases or lubricants s
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