prEN 12201-3

Plastics piping systems for water supply, and for drainage and sewerage under pressure - Polyethylene (PE) - Part 3: Fittings

This document specifies the characteristics of fittings made from polyethylene (PE) for buried and above ground applications, intended for the conveyance of water for human consumption, raw water prior to treatment, drainage and sewerage under pressure, vacuum sewer systems, and water for other purposes.
NOTE 1   For PE components intended for the conveyance of water for human consumption and raw water prior to treatment, attention is drawn to 6.6 of this document. Components manufactured for water for other purposes, drainage and sewerage are possibly not suitable for water supply for human consumption.
It also specifies the test parameters for the test methods referred to in this document.
In conjunction with Parts 1, 2, 4 and 5 of EN 12201, it is applicable to PE fittings, their joints and to 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;
c)   buried in the ground;
d)   sea outfalls;
e)   laid in water;
f)   above ground, including pipes suspended below bridges.
NOTE 2   For applications operating at constant temperature greater than 20 °C and up to 40 °C, see prEN 12201 1:2021, Annex A.
The EN 12201 series covers a range of allowable 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 guidance or regulations and installation practices or codes.
These fittings can be of the following types:
a)   fusion fittings;
1)   electrofusion fittings;
2)   spigot end fittings (for butt fusion using heated tools and electrofusion socket fusion);
3)   socket fusion fittings (see Annex A);
b)   mechanical fittings;
1)   compression fittings;
2)   flanged fittings;
c)   fabricated fittings (see Annex B).

Kunststoff-Rohrleitungssysteme für die Wasserversorgung und für Entwässerungs- und Abwasserdruckleitungen - Polyethylen (PE) - Teil 3: Formstücke

Dieses Dokument legt die Eigenschaften für erdverlegte und oberirdisch verlegte Formstücke aus Polyethylen (PE) fest, die für den Transport von Trinkwasser, des zur Aufbereitung vorgesehenen Rohwassers, für Entwässerungs- und Abwasserdruckleitungen, Unterdruckentwässerungssysteme sowie für den Transport von Brauchwasser vorgesehen sind.
ANMERKUNG 1   In Zusammenhang mit Rohrleitungsteilen aus PE für den Transport von Trinkwasser einschließlich des aufzubereitenden Rohwassers wird auf 6.6 des vorliegenden Dokuments verwiesen. Rohrleitungsteile, die für den Transport von Brauchwasser sowie für Entwässerungs- und Abwasserleitungen gefertigt wurden, sind möglicherweise nicht für die Versorgung mit Trinkwasser geeignet.
Dieses Dokument legt auch die Prüfparameter für die Prüfverfahren fest, auf die in diesem Dokument verwiesen wird.
In Verbindung mit EN 12201 1, EN 12201 2, EN 12201 4 und EN 12201 5 gilt es für Formstücke aus PE, deren Verbindungen untereinander, mit anderen Rohrleitungsteilen aus PE sowie mit Rohrleitungsteilen aus anderen Werkstoffen, die zur Verwendung unter den folgenden Bedingungen vorgesehen sind:
a)   maximal zulässiger Bauteilbetriebsdruck PFA bis 25 bar ;
b)   eine Betriebstemperatur von 20 °C als Bezugstemperatur;
c)   erdverlegt;
d)   Entwässerung ins Meer (Siele);
e)   in Gewässern verlegt;
f)   oberirdisch verlegt, einschließlich Düker und Brückenleitungen.
ANMERKUNG 2   Für Anwendungsgebiete, in denen konstante Betriebstemperaturen über 20 °C bis 40 °C auftreten, siehe prEN 12201 1:2021, Anhang A.
Die Normenreihe EN 12201 deckt einen Bereich von maximal zulässigen Bauteilbetriebsdrücken ab und enthält Anforderungen bezüglich Farben.
ANMERKUNG 3   Es liegt in der Verantwortung des Auftraggebers oder Planers, aus diesen Gesichtspunkten die geeignete Auswahl zu treffen, unter Berücksichtigung ihrer speziellen Anforderungen und jeglicher maßgebenden nationalen Empfehlungen oder Festlegungen und Verfahrensweisen oder Vorschriften für die Verlegung.
Diese Norm gilt für die folgenden Arten von Formstücken:
a)   Formstücke für Schweißverbindungen:
1)   Formstücke für Heizwendelschweißung;
2)   Formstücke mit Schweißenden (für Heizelementstumpfschweißung unter Verwendung von Heizelementen und Heizwendel-Schweißmuffen);
3)   Formstücke für Heizelementmuffenschweißung (siehe Anhang A);
b)   Formstücke für mechanische Verbindungen:
1)   Klemmverbinder;
2)   Formstücke für Flanschverbindungen;
c)   gefertigte Formstücke (siehe Anhang B).

Systèmes de canalisations en plastique pour l'alimentation en eau et pour les branchements et les collecteurs d'assainissement avec pression - Polyéthylène (PE) - Partie 3 : Raccords

Le présent document spécifie les caractéristiques des raccords en polyéthylène (PE) pour des applications enterrées et non enterrées, prévus pour le transport d’eau destinée à la consommation humaine, y compris l’eau brute avant traitement, les branchements et les collecteurs d’assainissement avec pression, les réseaux d’évacuation des eaux usées sous vide et l’eau destinée à d’autres usages.
NOTE 1   Pour les composants en PE prévus pour le transport d’eau destinée à la consommation humaine et d’eau brute avant traitement, l’attention est attirée sur le paragraphe 6.6 du présent document. Les composants fabriqués pour l’eau destinée à d’autres usages et pour l’assainissement peuvent s’avérer inaptes pour l’alimentation en eau destinée à la consommation humaine.
Il spécifie également les paramètres d’essai pour les méthodes d’essai référencées dans le présent document.
Conjointement avec les Parties 1, 2, 4 et 5 de l’EN 12201, il s’applique aux raccords 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 de service admissible, PFA, jusqu’à 25 bar  ) ;
b)   une température de service de 20 °C comme température de référence ;
c)   enterrés dans le sol ;
d)   comme émissaires de rejet en mer ;
e)   posés dans l’eau ;
f)   non enterrés, y compris canalisations suspendues sous des ponts.
NOTE 2   Pour les applications à température de service constante supérieure à 20 °C et jusqu’à 40 °C, voir le prEN 12201 1:2021, Annexe A.
La série EN 12201 couvre une gamme de pressions de service admissibles et donne les exigences concernant les couleurs.
NOTE 3   Il est de la responsabilité de l’acheteur ou du concepteur du réseau d’effectuer les choix appropriés à partir de ces données, en tenant compte des exigences particulières et de toute ligne directrice ou toute réglementation nationale applicable, ainsi que des pratiques ou codes de pose.
Ces raccords peuvent appartenir aux catégories suivantes :
a)   raccords soudables ;
1)   raccords électrosoudables ;
2)   raccords à bouts mâles (pour soudage bout à bout à l’aide d’outils chauffants et pour soudage par emboîture électrosoudable) ;
3)   raccords à emboîtures soudables (voir Annexe A) ;
b)   raccords mécaniques ;
1)   raccords à compression ;
2)   raccords à brides ;
c)   raccords façonnés (voir Annexe B).

Cevni sistemi iz polimernih materialov za oskrbo z vodo in za odvodnjavanje in kanalizacijo pod tlakom - Polietilen (PE) - 3. del: Fitingi

General Information

• Status: Not Published
• Publication Date: 20-Dec-2023
• ICS: 23.040.20 - Plastics pipes
• ICS: 23.040.45 - Plastics fittings
• Technical Committee: CEN/TC 155 - Plastics piping systems and ducting systems
• Drafting Committee: CEN/TC 155/WG 12 - Systems for water supply and pressure drainage and sewerage - PE, PP (solid wall)
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Start Date: 10-Jul-2023
• Due Date: 05-Oct-2022
• Completion Date: 10-Jul-2023
• Ref Project: oSIST prEN 12201-3:2021 - Plastics piping systems for water supply, and for drainage and sewerage under pressure - Polyethylene (PE) - Part 3: Fittings

Relations

• Revises: EN 12201-3:2011+A1:2012 - Plastics piping systems for water supply, and for drainage and sewerage under pressure - Polyethylene (PE) - Part 3: Fittings
• Effective Date: 22-Aug-2018

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 12201-3:2021
01-julij-2021
Cevni sistemi iz polimernih materialov za oskrbo z vodo in za odvodnjavanje in
kanalizacijo pod tlakom - Polietilen (PE) - 3. del: Fitingi

Plastics piping systems for water supply, and for drainage and sewerage under pressure

- Polyethylene (PE) - Part 3: Fittings

Kunststoff-Rohrleitungssysteme für die Wasserversorgung und für Entwässerungs- und

Abwasserdruckleitungen - Polyethylen (PE) - Teil 3: Formstücke
Systèmes de canalisations en plastique pour l'alimentation en eau et pour les

branchements et les collecteurs d'assainissement avec pression - Polyéthylène (PE) -

Partie 3 : Raccords
Ta slovenski standard je istoveten z: prEN 12201-3
ICS:
23.040.45 Fitingi iz polimernih Plastics fittings
materialov
91.140.60 Sistemi za oskrbo z vodo Water supply systems
93.030 Zunanji sistemi za odpadno External sewage systems
vodo
oSIST prEN 12201-3:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 12201-3:2021
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oSIST prEN 12201-3:2021
DRAFT
EUROPEAN STANDARD
prEN 12201-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2021
ICS 23.040.20; 23.040.45 Will supersede EN 12201-3:2011+A1:2012
English Version
Plastics piping systems for water supply, and for drainage
and sewerage under pressure - Polyethylene (PE) - Part 3:
Fittings

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 3:

Polyéthylène (PE) - Partie 3 : Raccords Formstücke

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 155.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
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. prEN 12201-3:2021 E

worldwide for CEN national Members.
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oSIST prEN 12201-3:2021
prEN 12201-3:2021 (E)
Contents Page

European foreword ...................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 7

3 Terms and definitions ................................................................................................................................... 8

4 Symbols and abbreviations ......................................................................................................................... 9

5 Material .............................................................................................................................................................. 9

5.1 Compound for fittings ................................................................................................................................... 9

5.2 Material for non-polyethylene parts........................................................................................................ 9

5.2.1 General................................................................................................................................................................ 9

5.2.2 Metal parts....................................................................................................................................................... 10

5.2.3 Sealing materials ........................................................................................................................................... 10

5.2.4 Other materials .............................................................................................................................................. 10

6 General characteristics ............................................................................................................................... 10

6.1 Appearance ..................................................................................................................................................... 10

6.2 Design ................................................................................................................................................................ 10

6.3 Colour ................................................................................................................................................................ 10

6.4 Electrical characteristics for electrofusion fittings .......................................................................... 10

6.5 Appearance of factory made joints ......................................................................................................... 11

6.6 Effect on water quality ................................................................................................................................ 11

7 Geometrical characteristics ...................................................................................................................... 11

7.1 Measurement of dimensions .................................................................................................................... 11

7.2 Dimensions of electrofusion socket fittings ........................................................................................ 11

7.2.1 Diameters and lengths of electrofusion sockets ................................................................................ 11

7.2.2 Wall thicknesses ............................................................................................................................................ 13

7.2.3 Out-of-roundness of the bore of a fitting (at any point) ................................................................. 14

7.3 Dimensions of electrofusion saddle fittings ........................................................................................ 14

7.4 Dimensions of spigot end fittings ............................................................................................................ 15

7.4.1 Diameters and lengths ................................................................................................................................ 15

7.4.2 Wall thickness of fusion end ..................................................................................................................... 18

7.4.3 Wall thickness of the fitting body ........................................................................................................... 18

7.4.4 Other dimensions ......................................................................................................................................... 18

7.5 Dimensions of socket fusion fittings ...................................................................................................... 18

7.6 Design and dimensions of mechanical fittings ................................................................................... 18

7.6.1 General.............................................................................................................................................................. 18

7.6.2 Mechanical fittings with polyethylene spigot ends .......................................................................... 18

7.6.3 Mechanical fittings with polyethylene electrofusion sockets ....................................................... 18

7.6.4 Threads ............................................................................................................................................................. 18

7.6.5 Dimensions of loose backing flanges and flange adapters ............................................................ 18

7.6.6 Dimensions of fabricated fittings ............................................................................................................ 18

8 Mechanical characteristics ........................................................................................................................ 19

8.1 General.............................................................................................................................................................. 19

8.2 Requirements ................................................................................................................................................. 19

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prEN 12201-3:2021 (E)

8.3 Performance requirements ...................................................................................................................... 22

9 Physical characteristics .............................................................................................................................. 22

9.1 Conditioning ................................................................................................................................................... 22

9.2 Requirements ................................................................................................................................................. 22

10 Chemical resistance of fittings in contact with chemicals ............................................................. 23

11 Performance requirements ...................................................................................................................... 23

12 Technical file .................................................................................................................................................. 23

13 Marking ............................................................................................................................................................ 24

13.1 General ............................................................................................................................................................. 24

13.2 Minimum required marking of fittings ................................................................................................. 24

13.3 Additional marking ...................................................................................................................................... 25

13.4 Fusion system recognition ........................................................................................................................ 25

14 Delivery Conditions ..................................................................................................................................... 25

Annex A (normative) Socket fusion fittings ..................................................................................................... 26

Annex B (normative) Fabricated fittings ........................................................................................................... 28

Annex C (informative) Examples of typical terminal connection for electrofusion fittings ........... 35

Annex D (normative) Short-term pressure test method ............................................................................. 38

Annex E (normative) Tensile test for fitting/pipe assemblies .................................................................. 40

Bibliography ................................................................................................................................................................. 41

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oSIST prEN 12201-3:2021
prEN 12201-3:2021 (E)
European foreword

This document (prEN 12201-3:2021) has been prepared by Technical Committee CEN/TC 155 “Plastics

piping systems and ducting systems”, the secretariat of which is held by NEN.
This document will supersede EN 12201-3:2011+A1:2012

In comparison with the previous edition, the following technical modifications have been made:

— 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. prEN 12201-1:2021, Annex A discusses the

performance of this type of material and gives additional information for non-conventional installation

techniques. In addition the size range has been increased to 800 mm diameter, test methods have been

updated.

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 drainage and sewerage under pressure

— Polyethylene (PE) — Part 1: General;

— EN 12201-2, Plastics piping systems for water supply, and for drainage and sewerage under pressure

— Polyethylene (PE) — Part 2: Pipes;

— EN 12201-3, Plastics piping systems for water supply, and for drainage and sewerage under pressure

— Polyethylene (PE) — Part 3: Fittings (this document);

— EN 12201-4, Plastics piping systems for water supply, and for drainage and sewerage under pressure

— Polyethylene (PE) — Part 4: Valves for water supply systems;

— EN 12201-5, Plastics piping systems for water supply, and for drainage and sewerage 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 — Polyethylene (PE) — Part 7: Guidance for

the assessment of conformity.
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oSIST prEN 12201-3:2021
prEN 12201-3:2021 (E)
Introduction

The System Standard, of which this is Part 3, specifies the requirements for a piping system and its

components when made from polyethylene (PE), intended to be used for water supply intended for

human consumption, including the conveyance of raw water prior to treatment, drainage and sewerage

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:

a) 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;

b) products intended for use in water supply systems should comply, when existing, with national

regulations and testing arrangements that ensure fitness for contact with drinking water.

Requirements and test methods for material and components, other than fittings, are specified in

prEN 12201-1, prEN 12201-2 and prEN 12201-4.

Characteristics for fitness of purpose are covered in prEN 12201-5. CEN/TS 12201-7 [2] gives guidance

for the assessment of conformity.
This Part of EN 12201 covers the characteristics of fittings.
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oSIST prEN 12201-3:2021
prEN 12201-3:2021 (E)
1 Scope

This document specifies the characteristics of fittings made from polyethylene (PE) for buried and above

ground applications, intended for the conveyance of water for human consumption, raw water prior to

treatment, drainage and sewerage under pressure, vacuum sewer systems, and water for other purposes.

NOTE 1 For PE components intended for the conveyance of water for human consumption and raw water prior

to treatment, attention is drawn to 6.6 of this document. Components manufactured for water for other purposes,

drainage and sewerage are possibly not suitable for water supply for human consumption.

It also specifies the test parameters for the test methods referred to in this document.

In conjunction with Parts 1, 2, 4 and 5 of EN 12201, it is applicable to PE fittings, their joints and to 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;
c) buried in the ground;
d) sea outfalls;
e) laid in water;
f) above ground, including pipes suspended below bridges.

NOTE 2 For applications operating at constant temperature greater than 20 °C and up to 40 °C, see

prEN 12201-1:2021, Annex A.

The EN 12201 series covers a range of allowable 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 guidance or regulations and

installation practices or codes.
These fittings can be of the following types:
a) fusion fittings;
1) electrofusion fittings;

2) spigot end fittings (for butt fusion using heated tools and electrofusion socket fusion);

3) socket fusion fittings (see Annex A);
b) mechanical fittings;
1) compression fittings;
2) flanged fittings;
c) fabricated fittings (see Annex B).
5 2
1) 1 bar = 0,1 MPa = 10 Pa; 1 MPa = 1 N/mm .
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oSIST prEN 12201-3:2021
prEN 12201-3:2021 (E)
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 1716, Plastics piping systems - Polyethylene (PE) tapping tees - Test method for impact resistance of an

assembled tapping tee

prEN 12201-1:2021, Plastics piping systems for water supply, and for drainage and sewerage under

pressure - Polyethylene (PE) - Part 1: General

prEN 12201-2:2021, Plastics piping systems for water supply, and for drainage and sewerage under

pressure — Polyethylene (PE) — Part 2: Pipes

prEN 12201-5, Plastics piping systems for water supply, and for drainage and sewerage under pressure —

Polyethylene (PE) — Part 5: Fitness for purpose of the system

CEN/TR 15438, Plastics piping systems - Guidance for coding of products and their intended uses

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 1167-3, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids - Determination

of the resistance to internal pressure - Part 3: Preparation of components (ISO 1167-3)

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 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 4433-1, Thermoplastics pipes — Resistance to liquid chemicals — Classification — Part 1: Immersion

test method

ISO 4433-2, Thermoplastics pipes — Resistance to liquid chemicals — Classification — Part 2: Polyolefin

pipes

ISO 9624, Thermoplastics piping systems for fluids under pressure — Flange adapters and loose backing

flanges — Mating dimensions

ISO 12176-1, Plastics pipes and fittings — Equipment for fusion jointing polyethylene systems — Part 1:

Butt fusion

ISO 13950, Plastics pipes and fittings — Automatic recognition systems for electrofusion joints

ISO 13951, Plastics piping systems — Test method for the resistance of plastic pipe/pipe or pipe/fitting

assemblies to tensile loading

ISO 13953, Polyethylene (PE) pipes and fittings — Determination of the tensile strength and failure mode

of test pieces from a butt-fused joint
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oSIST prEN 12201-3:2021
prEN 12201-3:2021 (E)

ISO 13954, Plastics pipes and fittings — Peel decohesion test for polyethylene (PE) electrofusion assemblies

of nominal outside diameter greater than or equal to 90 mm

ISO 13955, Plastics pipes and fittings — Crushing decohesion test for polyethylene (PE) electrofusion

assemblies

ISO 13956, Plastics pipes and fittings — Decohesion test of polyethylene (PE) saddle fusion joints —

Evaluation of ductility of fusion joint interface by tear test

ISO 17885:2015, Plastics piping systems – Mechanical fittings for pressure piping systems – Specifications

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, symbols and abbreviations given in

prEN 12201-1 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
electrofusion socket fitting

polyethylene (PE) fitting which contains one or more integral heating elements that are capable of

transforming electrical energy into heat to realise a fusion joint with a spigot end or pipe

3.2
electrofusion saddle fitting

polyethylene (PE) fitting which contains one or more integral heating elements that are capable of

transforming electrical energy into heat to realise a fusion joint on to a pipe
3.2.1
tapping tee

electrofusion saddle fitting (top-loading or wraparound) which contains an integral cutter to cut through

the wall of the main pipe, which remains in the body of this fitting
3.2.2
branch saddle

electrofusion saddle fitting (top loading or wrap round) which requires an ancillary cutting tool for

drilling the hole in the adjoining main pipe
3.3
spigot end fitting

polyethylene (PE) fitting where the outside diameter of the spigot end is equal to the nominal outside

diameter, dn, of the corresponding pipe
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oSIST prEN 12201-3:2021
prEN 12201-3:2021 (E)
3.4
mechanical fitting

fitting, that generally includes a compression part to provide pressure integrity, leaktightness and

resistance to end loads, for assembling polyethylene (PE) pipe to another PE pipe or any other element

of the piping system

Note 2 to entry: A pipe-supporting sleeve providing a permanent support for a polyethylene (PE) pipe to prevent

creep in the pipe wall under radial compressive forces, may be applicable. The metallic parts of the fitting can be

assembled to metallic pipes by screw-threads, compression joints, welded or flanged connections, including PE

flanges. In some cases, the supporting sleeve at the same time constitutes a grip ring.

Note 3 to entry: The fitting can allow either a dismountable or permanently assembled joint.

Note 4 to entry: The mechanical fitting can be supplied for field assembly, typically as a material transition fitting,

or pre-assembled by the manufacturer.
3.5
fabricated fitting

fitting produced from pipe conforming to prEN 12201-2 and/or from injection-moulded fittings in

accordance with this document
4 Symbols and abbreviations

For the purposes of this document, the symbols and abbreviations given in prEN 12201-1 apply.

5 Material
5.1 Compound for fittings

The PE compound from which the fittings are made shall be in accordance with prEN 12201-1.

The stress bearing parts of injection moulded fittings shall only be made from virgin material conforming

to prEN 12201-1.

Non-stress bearing PE parts shall be made from virgin material or own reworked material from a

compound with the same MRS or a mixture of both materials.
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

utilized in cases where suitable European Standards do not exist provided that the fitness for purpose

shall be demonstrated.

The materials and constituent elements used in making the fitting (including elastomers, greases, and

any metal parts) 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 pipe conforming to prEN 12201-2 with which they are intended to be used:

a) during storage;
b) under the effect of the fluids being conveyed;
c) with respect to the service environment and operating conditions.

The requirements for the level of material performance for 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.
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oSIST prEN 12201-3:2021
prEN 12201-3:2021 (E)

Other materials used in fittings in contact with the PE pipe shall not adversely affect the pipe performance

or initiate stress cracking.
NOTE 5.2 does not apply to non-stress bearing fitting parts.
5.2.2 Metal parts

All metal parts susceptible to corrosion shall be adequately protected, provided this is necessary for

durability and function of the system.

When dissimilar metallic parts are used, which can be in contact with moisture, steps shall be taken to

avoid the possibility of galvanic corrosion.
5.2.3 Sealing materials

Elastomeric materials used for the manufacture of seals shall conform to EN 681-1.

If other sealing materials are used, they need to be proven for water supply systems.

5.2.4 Other materials

Greases or lubricants shall not exude on to the fusion areas, and shall not affect the long-term

performance of the fitting nor have any adverse effect on the quality of the water.

6 General characteristics
6.1 Appearance

When viewed without magnification, the internal and external surfaces of the fitting shall be smooth,

clean and free from scoring, cavities and other surface defects to an extent that would prevent conformity

of the fitting to this document.

No component of the fitting shall show any signs of damage, scratches, pitting, bubbles, blisters,

inclusions or cracks to an extent that would prevent conformity of the fittings to the requirements of this

document.
6.2 Design

The design of the fitting shall be such that, when assembling the fitting onto the pipe or other components

in accordance with the manufacturer’s recommendations, the electrical coils and/or seals are not

displaced.
6.3 Colour

The fitting shall be black or blue. For fabricated fittings the colour characteristics of pipes according to

EN 12201-2 applies.

The blue colour is intended for components for the conveyance of water for human consumption only.

For above ground installations, all non-black components shall be protected from direct UV light.

6.4 Electrical characteristics for electrofusion fittings

The electrical protection that shall be provided by the system depends on the voltage and the current

intensity used and o
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