prEN 1555-3

Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings

This document specifies the characteristics of fusion fittings made from polyethylene (PE) as well as of mechanical fittings for piping systems in the field of the supply of gaseous fuels.
NOTE 1   Additional information related to the installation of PE 100-RC systems is given in prEN 1555-1:2024, Annex A.
NOTE 2   Additional information about the suitability of PE pipe systems for hydrogen and its admixtures is given in prEN 1555-1:2024, Annex B.
It also specifies the test parameters for the test methods referred to in this document.
In conjunction with EN 1555-1, EN 1555-2, EN 1555-4 and EN 1555-5, 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)   a maximum operating pressure (MOP), up to and including 10 bar , at a design reference temperature of 20 °C;
b)   an operating temperature between −20 °C and 40 °C.
For operating temperatures between 20 °C and 40 °C, derating coefficients are defined in EN 1555 5.
The EN 1555 series covers a range of MOPs and gives requirements concerning colours.
This document is applicable for fittings of the following types:
a)   electrofusion socket fittings;
b)   electrofusion saddle fittings;
c)   spigot end fittings (for butt fusion using heated tools and electrofusion);
d)   mechanical fittings.
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.
NOTE 3   The fittings can be, for example, in the form of couplers, saddles, equal and reduced tees, reducers, elbows, bends or end caps.

Kunststoff-Rohrleitungssysteme für die Gasversorgung - Polyethylen (PE) - Teil 3: Formstücke

Dieses Dokument legt die Eigenschaften von Formstücken aus Polyethylen (PE) für Schweißverbindungen und von Formstücken für mechanische Verbindungen für Rohrleitungssysteme im Bereich der Versorgung mit gasförmigen Brennstoffen fest.
ANMERKUNG 1   Zusätzliche Informationen bezüglich der Verlegung von PE-100-RC-Systemen sind in prEN 1555-1:2024, Anhang A angegeben.
ANMERKUNG 2   Zusätzliche Informationen über die Eignung von PE-Rohrsystemen für Wasserstoff und dessen Beimischungen sind in prEN 1555-1:2024, Anhang B angegeben.
Es legt auch die Prüfparameter für die Prüfverfahren fest, auf die in diesem Dokument verwiesen wird.
In Verbindung mit EN 1555-1, EN 1555-2, EN 1555 4 und EN 1555-5 ist dieses Dokument anwendbar für Rohre, Formstücke und Armaturen aus PE, deren Verbindungen sowie Verbindungen mit Rohrleitungsteilen aus PE und anderen Werkstoffen, die für die Verwendung unter den folgenden Bedingungen vorgesehen sind:
a)   für einen höchstzulässigen Betriebsdruck MOP (en: maximum operating pressure) bis einschließlich 10 bar  bei einer Bemessungs-Bezugstemperatur von 20 °C;
b)   für eine Betriebstemperatur zwischen −20 °C und 40 °C.
Für Betriebstemperaturen zwischen 20 °C und 40 °C sind Minderungsfaktoren festgelegt in EN 1555-5.
Die Normenreihe EN 1555 deckt einen Bereich von MOPs ab und enthält Anforderungen bezüglich Farben.
Dieses Dokument ist anwendbar für die folgenden Arten von Formstücken:
a)   Heizwendel-Schweißmuffen;
b)   Heizwendel-Schweißsattel;
c)   Formstücke mit Schweißenden (für Heizelementstumpfschweißen unter Verwendung von Heizelementen und Heizwendelschweißen);
d)   Formstücke für mechanische Verbindungen (mechanische Rohrverbinder).
Es liegt in der Verantwortung des Auftraggebers oder Planers, aus diesen Kriterien die geeignete Auswahl zu treffen, unter Berücksichtigung ihrer speziellen Anforderungen und jeglicher maßgebender nationaler Anleitungen oder Festlegungen und Verfahrensweisen oder Vorschriften für die Verlegung.
ANMERKUNG 3   Die Formstücke können beispielsweise als Verbindungsstücke, Sattel, T-Stücke mit gleichem und reduziertem Abzweig, Reduzierstücke, Winkelstücke, Bögen oder Verschlussstücke ausgeführt sein.

Systèmes de canalisations en plastique pour la distribution de combustibles gazeux - Polyéthylène (PE) - Partie 3 : Raccords

Le présent document spécifie les caractéristiques des raccords soudables en polyéthylène (PE) ainsi que celles des raccords mécaniques fabriqués pour les systèmes de canalisations destinées à la distribution de combustibles gazeux.
NOTE 1   Des informations additionnelles concernant la pose de systèmes en PE 100 RC sont données dans le prEN 1555-1:2024, Annexe A.
NOTE 2   Des informations additionnelles sur l’aptitude à l’emploi des systèmes de canalisations en PE pour l’hydrogène et ses mélanges sont données dans le prEN 1555-1:2024, Annexe B.
Il spécifie également les paramètres d’essai pour les méthodes d’essai référencées dans le présent document.
Conjointement avec l’EN 1555-1, l’EN 1555-2, l’EN 1555-4 et l’EN 1555-5, le présent document s’applique aux tubes, raccords et 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 bar , à une température de référence de calcul de 20 °C ;
b)   une température de service comprise entre -20 °C et 40 °C.
Pour des températures de service comprises entre 20 °C et 40 °C, les facteurs de réduction sont définis dans l’EN 1555-5.
La série EN 1555 couvre une gamme de MOP et donne les exigences concernant les couleurs.
Le présent document est applicable aux raccords des types suivants :
a)   raccords à emboîture électrosoudable ;
b)   selles électrosoudables ;
c)   raccords à bouts mâles (pour soudage bout à bout à l’aide d’outils chauffants et pour électrosoudage) ;
d)   raccords mécaniques.
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.
NOTE 3   Les raccords peuvent être, par exemple, des manchons, des selles, des tés égaux, des tés réduits, des réductions, des coudes, des courbes ou des embouts.

Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Polietilen (PE) - 3. del: Fitingi

General Information

• Status: Not Published
• Publication Date: 10-Aug-2025
• 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: 4060 - Closure of enquiry - Enquiry
• Start Date: 29-Aug-2024
• Due Date: 17-Jun-2024
• Completion Date: 29-Aug-2024
• Ref Project: oSIST prEN 1555-3:2024 - Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings

Relations

• Revises: EN 1555-3:2021 - Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings
• Effective Date: 26-Apr-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2024
Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Polietilen
(PE) - 3. del: Fitingi
Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3:
Fittings
Kunststoff-Rohrleitungssysteme für die Gasversorgung - Polyethylen (PE) - Teil 3:
Formstücke
Systèmes de canalisations en plastique pour la distribution de combustibles gazeux -
Polyéthylène (PE) - Partie 3 : Raccords
Ta slovenski standard je istoveten z: prEN 1555-3
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.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2024
ICS 23.040.45 Will supersede EN 1555-3:2021
English Version
Plastics piping systems for the supply of gaseous fuels -
Polyethylene (PE) - Part 3: Fittings
Systèmes de canalisations en plastique pour la Kunststoff-Rohrleitungssysteme für die Gasversorgung
distribution de combustibles gazeux - Polyéthylène - Polyethylen (PE) - Teil 3: Formstücke
(PE) - Partie 3 : Raccords
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, Türkiye 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1555-3:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 8
4 Symbols and abbreviated terms . 9
5 Material . 10
5.1 PE compound for fittings . 10
5.2 Material for non-polyethylene parts . 10
5.2.1 General . 10
5.2.2 Metal parts . 10
5.2.3 Sealing materials . 11
5.2.4 Other materials . 11
6 General characteristics . 11
6.1 Appearance . 11
6.2 Colour . 11
6.3 Design . 11
6.4 Appearance of factory-made joints . 11
6.5 Electrical characteristics for electrofusion fittings . 11
7 Geometrical characteristics . 12
7.1 Measurement of dimensions. 12
7.2 Dimensions of electrofusion socket fittings . 12
7.2.1 Diameters and lengths of electrofusion sockets . 12
7.2.2 Wall thicknesses . 15
7.2.3 Out-of-roundness of the bore of a fitting (at any point). 15
7.2.4 Spigots . 15
7.2.5 Other dimensions. 15
7.3 Dimensions of electrofusion saddle fittings . 15
7.4 Dimensions of spigot end fittings . 16
7.4.1 Diameters and lengths . 16
7.4.2 Wall thickness of the fusion end . 19
7.4.3 Wall thickness of the fitting body. 19
7.4.4 Other dimensions. 19
7.5 Design and dimensions of mechanical fittings . 19
7.5.1 General . 19
7.5.2 Mechanical fittings with polyethylene spigot ends . 20
7.5.3 Mechanical fittings with polyethylene electrofusion sockets . 20
7.5.4 Threads . 20
8 Mechanical characteristics . 20
8.1 General . 20
8.2 Requirements . 20
8.3 Performance requirements . 24
9 Physical characteristics . 25
9.1 Conditioning . 25
9.2 Requirements . 25
10 Performance requirements . 26
11 Technical information . 27
12 Marking . 27
12.1 General . 27
12.2 Minimum required marking of fittings . 28
12.3 Additional marking . 28
12.4 Fusion system recognition . 28
13 Delivery conditions . 29
Annex A (informative) Examples of typical terminal connections for electrofusion fittings . 30
Annex B (normative) Short-term pressure test method . 33
Annex C (normative) Tensile test for fitting/pipe assemblies . 35
Bibliography . 37

European foreword
This document (prEN 1555-3:2024) has been prepared by Technical Committee CEN/TC 155 “Plastics
piping systems and ducting systems”, the secretariat of which is held by NEN.
This document is currently submitted to the CEN Enquiry.
This document supersedes EN 1555-3:2021.
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 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 (this standard);
— EN 1555-4, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 4: Valves;
— EN 1555-5, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 5: Fitness
for purpose of the system.
In addition, the following document provides guidance on the assessment of conformity:
— CEN/TS 1555-7, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 7:
Guidance for assessment of conformity.
The revision of this System Standard has been carried out to add reference to information related to the
suitability of PE pipe systems for 100 % hydrogen and its admixtures with natural gas.
NOTE EN 12007-2 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).

Introduction
The EN 1555 series specifies the requirements for a piping system and its components made from
polyethylene (PE) compounds, which is intended to be used for the supply of gaseous fuels.
This document covers the character
...