SIST EN 1555-5:2021

Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 5: Fitness for purpose of the system

This part of EN 1555 specifies requirements of fitness for purpose of the polyethylene (PE) piping system in the field of the supply of gaseous fuels.
It specifies the definitions of electrofusion, butt fusion and mechanical joints.
It specifies the method of preparation of test piece joints, and the tests to be carried out on these joints for assessing the fitness for purpose of the system under normal and extreme conditions.
It specifies the test parameters for the test methods referred to in this document.
NOTE 1   This document is intended only to be used by the product manufacturer to assess the performance of components according to EN 1555-2, EN 1555-3, and/or EN 1555-4 when joined together under normal and extreme conditions in accordance with this document. It is not intended for on-site testing of pipe systems.
In conjunction with Parts 1 to 4 of EN 1555, it is applicable to PE pipes, fittings, valves, their joints and to joints with components of other materials intended to be used under the following conditions:
a)   a maximum operating pressure, MOP, up to and including 10 bar  ;
b)   an operating temperature of 20 °C as reference temperature.
NOTE 2   For other operating temperatures, derating coefficients can be used, see Annex A.
EN 1555 (all parts) covers a range of maximum operating pressures and gives requirements concerning colours and additives.
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.

Kunststoff-Rohrleitungssysteme für die Gasversorgung - Polyethylen (PE) - Teil 5: Gebrauchstauglichkeit des Systems

Dieses Dokument legt Anforderungen an die Gebrauchstauglichkeit des Rohrleitungssystems aus Polyethylen (PE) im Bereich der Versorgung mit gasförmigen Brennstoffen fest.
Es legt die Begriffe für Heizwendelschweißverbindungen, Stumpfschweißverbindungen und mechanische Verbindungen fest.
Es legt das Verfahren für die Vorbereitung der Verbindungen von Probekörpern sowie die Prüfungen, die an diesen Verbindungen für die Beurteilung der Gebrauchstauglichkeit des Systems unter üblichen Bedingungen sowie unter extremen Bedingungen durchzuführen sind, fest.
Es legt die Prüfparameter für die Prüfverfahren fest, auf die in diesem Dokument verwiesen wird.
ANMERKUNG 1   Dieses Dokument ist ausschließlich dafür vorgesehen, vom Produkthersteller zur Bewertung der Leistungsfähigkeit von Rohrleitungsteilen nach EN 1555 2, EN 1555 3 und/oder EN 1555 4, die miteinander unter üblichen Bedingungen und unter extremen Bedingungen nach diesem Dokument verbunden sind, verwendet zu werden. Es ist nicht für die Prüfung von Rohrleitungssystemen auf der Baustelle vorgesehen.
In Verbindung mit Teil 1 bis Teil 4 von EN 1555 gilt es für PE Rohre,  Formstücke,  Armaturen, deren Verbindungen untereinander sowie mit Rohrleitungsteilen aus anderen Werkstoffen, die für die Verwendung unter den folgenden Bedingungen vorgesehen sind:
a)   der maximal zulässige Betriebsdruck MOP (en: maximum operating pressure) beträgt höchstens 10 bar );
b)   es gilt eine Betriebstemperatur von 20 °C als Bezugstemperatur.
ANMERKUNG 2   Für andere Betriebstemperaturen können Minderungsfaktoren verwendet werden, siehe Anhang A.
EN 1555 (alle Teile) deckt einen Bereich von maximal zulässigen Betriebsdrücken ab und enthält Anforderungen bezüglich Farben und Zusatzstoffen.
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 maßgebender nationaler Festlegungen und Verfahrensweisen oder Vorschriften für die Verlegung.

Systèmes de canalisations en plastique pour la distribution de combustibles gazeux - Polyéthylène (PE) - Partie 5 : Aptitude à l’emploi du système

Le présent document spécifie les exigences d’aptitude à l’emploi du système de canalisations en polyéthylène (PE) destiné à la distribution de combustibles gazeux.
Il spécifie les définitions des assemblages par électrosoudage, par soudage bout à bout et des assemblages mécaniques.
Il spécifie également la méthode de préparation des assemblages d’éprouvettes, ainsi que les essais à réaliser sur ces assemblages pour évaluer l’aptitude à l’emploi du système dans des conditions normales et extrêmes.
Il spécifie les paramètres d’essai pour les méthodes d’essai référencées dans ce document.
NOTE 1   Ce document est destiné à être utilisé par le fabricant du produit pour évaluer la performance des composants selon l’EN 1555-2, l’EN 1555-3 et/ou l’EN 1555-4 lorsqu’ils sont assemblés dans des conditions normales et extrêmes conformément au présent document. Il n’est pas destiné à être utilisé pour des essais sur site des systèmes de canalisations.
Conjointement avec les Parties 1 à 4 de l’EN 1555, il s’applique aux tubes, raccords et robinets en PE et à leurs assemblages, ainsi qu’aux assemblages avec des composants en d’autres matières destinés à être utilisés dans les conditions suivantes :
a)   une pression maximale de service, MOP, jusqu’à et y compris 10 bar   ;
b)   une température de service de 20 °C comme température de référence.
NOTE 2   Pour d’autres températures de service, des facteurs de réduction peuvent être utilisés ; voir l’Annexe A.
L’EN 1555 (toutes les parties) couvre une gamme de pressions maximales de service et donne les exigences concernant les couleurs et les additifs.
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.

Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Polietilen (PE) - 5. del: Ustreznost sistema namenu

General Information

• Status: Published
• Public Enquiry End Date: 19-Dec-2019
• Publication Date: 22-Jul-2021
• ICS: 83.140.30 - Plastics pipes and fittings for non fluid use
• ICS: 91.140.40 - Gas supply systems
• Technical Committee: PCV - Plastic pipes, fittings and valves
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 19-Jul-2021
• Due Date: 23-Sep-2021
• Completion Date: 23-Jul-2021
• Ref Project: EN 1555-5:2021 - Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 5: Fitness for purpose of the system

Relations

• Replaces: SIST EN 1555-5:2010 - Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 5: Fitness for purpose of the system
• Effective Date: 01-Sep-2021

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 1555-5:2021
01-september-2021
Nadomešča:
SIST EN 1555-5:2010
Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Polietilen
(PE) - 5. del: Ustreznost sistema namenu
Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 5:
Fitness for purpose of the system
Kunststoff-Rohrleitungssysteme für die Gasversorgung - Polyethylen (PE) - Teil 5:
Gebrauchstauglichkeit des Systems
Systèmes de canalisations en plastique pour la distribution de combustibles gazeux -
Polyéthylène (PE) - Partie 5 : Aptitude à l’emploi du système
Ta slovenski standard je istoveten z: EN 1555-5:2021
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
SIST EN 1555-5:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 1555-5:2021

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SIST EN 1555-5:2021


EN 1555-5
EUROPEAN STANDARD

NORME EUROPÉENNE

July 2021
EUROPÄISCHE NORM
ICS 23.040.01 Supersedes EN 1555-5:2010
English Version

Plastics piping systems for the supply of gaseous fuels -
Polyethylene (PE) - Part 5: Fitness for purpose of the
system
Systèmes de canalisations en plastique pour la Kunststoff-Rohrleitungssysteme für die Gasversorgung
distribution de combustibles gazeux - Polyéthylène - Polyethylen (PE) - Teil 5: Gebrauchstauglichkeit des
(PE) - Partie 5 : Aptitude à l'emploi du système Systems
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 1555-5:2021 E
worldwide for CEN national Members.

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SIST EN 1555-5:2021
EN 1555-5:2021 (E)
Contents Page
European foreword . 3
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Symbols and abbreviations . 7
5 Fitness for purpose . 7
5.1 Method of preparation of assemblies for testing . 7
5.1.1 General . 7
5.1.2 Butt fusion joints . 8
5.1.3 Electrofusion jointing . 8
5.1.4 Mechanical joints . 8
5.2 Requirements for fitness for purpose . 8
5.2.1 General . 8
5.2.2 Fitness for purpose of butt fusion joints . 9
5.2.3 Fitness for purpose for electrofusion joints . 10
5.2.4 Fitness for purpose for mechanical joints . 11
5.3 Conditioning . 11
5.4 Requirements . 11
5.5 Testing of pipe with coextruded layers. 13
6 Design coefficient . 13
Annex A (informative) Derating coefficients for operating temperatures . 14
Annex B (normative) Rapid crack propagation (RCP) resistance of pipe at temperature less
than 0 °C . 15
Bibliography. 16

2

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SIST EN 1555-5:2021
EN 1555-5:2021 (E)
European foreword
This document (EN 1555-5:2021) 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 1555-5:2010.
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.
— Test methods have been updated.
System Standards 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;
— EN 1555-5, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) —
Part 5: Fitness for purpose of the system (this standard);
— CEN/TS 1555-7, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) —
Part 7: Guidance for 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.
3

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SIST EN 1555-5:2021
EN 1555-5:2021 (E)
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.
4

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SIST EN 1555-5:2021
EN 1555-5:2021 (E)
Introduction
This document specifies the requirements of 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 are specified in EN 1555-1:2021,
EN 1555-2:2021, EN 1555-3:2021 and EN 1555-4:2021.
CEN/TS 1555-7 [2] gives guidance for assessment of conformity. Recommended practice for installation
is given in EN 12007-2 [1] prepared by CEN/TC 234.
This part of EN 1555 covers the characteristics of fitness for purpose of the system.
5

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SIST EN 1555-5:2021
EN 1555-5:2021 (E)
1 Scope
This document specifies the requirements of fitness for purpose of the polyethylene (PE) piping system
in the field of the supply of gaseous fuels.
It specifies the requirements for electrofusion, butt fusion and mechanical joints.
It specifies the method of preparation of test piece joints, and the tests to be carried out on these joints
for assessing the fitness for purpose of the system under normal and extreme conditions.
It specifies the test parameters for the test methods referred to in this document.
NOTE 1 This document is intended only to be used by the product manufacturer to assess the performance of
components according to EN 1555-2, EN 1555-3:2021, and EN 1555-4:2021 when joined together under normal
and extreme conditions in accordance with this document. It is not intended for on-site testing of pipe systems.
In conjunction with Parts 1 to 4 of EN 1555, it is applicable to PE pipes, fittings, valves, their joints and to
joints with components of other materials intended to be used under the following conditions:
1
a) a maximum operating pressure, MOP, up to and including 10 bar at a reference temperature of
20 °C for design purposes;
b) an operating temperature between − 20 °C and 40 °C.
NOTE 2 For other operating temperatures between 20 °C and 40 °C, derating coefficients are defined in Annex A.
EN 1555 (all parts) covers a range of maximum operating pressures and gives requirements concerning
colours.
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 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
EN 1555-3:2021, Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings
EN 1555-4:2021, Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 4: Valves
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 1167-2, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids - Determination
of the resistance to internal pressure - Part 2: Preparation of pipe test pieces (ISO 1167-2)
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 13477, Thermoplastics pipes for the conveyance of fluids - Determination of resistance to rapid crack
propagation (RCP) - Small-scale steady-state test (S4 test) (ISO 13477)

1 5 2
1 bar = 0,1 MPa = 10 Pa; 1 MPa = 1 N/mm .
6

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SIST EN 1555-5:2021
EN 1555-5:2021 (E)
EN ISO 13478, Thermoplastics pipes for the conveyance of fluids - Determination of resistance to rapid crack
propagation (RCP) - Full-scale test (FST) (ISO 13478)
ISO 11413:2019, Plastics pipes and fittings - Preparation of test piece assemblies between a polyethylene
(PE) pipe and an electrofusion fitting
ISO 11414:2009, Plastics pipes and fittings - Preparation of polyethylene (PE) pipe/pipe or pipe/fitting test
piece assemblies by butt fusion
ISO 13953, Polyethylene (PE) pipes and fittings - Determination of the tensile strength and failure mode of
test pieces from a butt-fused joint
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, Plastics piping systems - Mechanical fittings for pressure piping systems - Specifications
3 Terms and definitions
For the purposes of this document, the terms and definitions, symbols and abbreviations given in
EN 1555-1:2021 and EN 1555-3:2021, and the following definition apply.
ISO and IEC maintain terminological databases for u
...

SLOVENSKI STANDARD
oSIST prEN 1555-5:2019
01-december-2019
Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Polietilen
(PE) - 5. del: Ustreznost sistema namenu
Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 5:
Fitness for purpose of the system
Kunststoff-Rohrleitungssysteme für die Gasversorgung - Polyethylen (PE) - Teil 5:
Gebrauchstauglichkeit des Systems
Systèmes de canalisations en plastique pour la distribution de combustibles gazeux -
Polyéthylène (PE) - Partie 5 : Aptitude à l’emploi du système
Ta slovenski standard je istoveten z: prEN 1555-5
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
oSIST prEN 1555-5:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 1555-5:2019

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oSIST prEN 1555-5:2019


DRAFT
EUROPEAN STANDARD
prEN 1555-5
NORME EUROPÉENNE

EUROPÄISCHE NORM

October 2019
ICS 23.040.01 Will supersede EN 1555-5:2010
English Version

Plastics piping systems for the supply of gaseous fuels -
Polyethylene (PE) - Part 5: Fitness for purpose of the
system
Systèmes de canalisations en plastique pour la Kunststoff-Rohrleitungssysteme für die Gasversorgung
distribution de combustibles gazeux - Polyéthylène - Polyethylen (PE) - Teil 5: Gebrachstauglichkeit des
(PE) - Partie 5: Aptitude à l'emploi du système Systems
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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1555-5:2019 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
oSIST prEN 1555-5:2019
prEN 1555-5:2019 (E)
Contents Page
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Fitness for purpose . 7
4.1 Method of preparation of assemblies for testing . 7
4.1.1 General . 7
4.1.2 Butt fusion joints . 7
4.1.3 Electrofusion jointing . 7
4.1.4 Mechanical joints . 7
4.2 Requirements for fitness for purpose . 7
4.2.1 General . 7
4.2.2 Fitness for purpose of butt fusion joints . 8
4.2.3 Fitness for purpose for electrofusion joints . 9
4.2.4 Fitness for purpose for mechanical joints . 10
4.3 Conditioning . 10
4.4 Requirements . 10
4.5 Retest in case of failure at 80 °C . 12
5 Design coefficient . 12
Annex A (informative) Derating coefficients for operating temperatures . 13
Annex B (normative) Rapid crack propagation (RCP) resistance of pipe at temperature less
than 0 °C . 14

2

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oSIST prEN 1555-5:2019
prEN 2019:2019 (E)
European foreword
This document (prEN 1555-5:2019) 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 will supersede EN 1555-5:2010.
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;
— EN 1555-5, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 5: Fitness
for purpose of the system (this standard);
— CEN/TS 1555-7, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 7:
Guidance for assessment of conformity.
System Standards 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.
NOTE EN 12007-2:2012 [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).
3

---------------------- Page: 5 ----------------------
oSIST prEN 1555-5:2019
prEN 1555-5:2019 (E)
Introduction
This document specifies the requirements of 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 are specified in prEN 1555-1:2019,
prEN 1555-2:2019, prEN 1555-3:2019 and prEN 1555-4:2019.
CEN /TS 1555-7 [1] gives guidance for assessment of conformity. Recommended practice for installation
is given in EN 12007-2:2012 [2] prepared by CEN /TC 234.
This part of EN 1555 covers the characteristics of fitness for purpose of the system.
4

---------------------- Page: 6 ----------------------
oSIST prEN 1555-5:2019
prEN 2019:2019 (E)
1 Scope
This document specifies requirements of fitness for purpose of the polyethylene (PE) piping system in
the field of the supply of gaseous fuels.
It specifies the definitions of electrofusion, butt fusion and mechanical joints.
It specifies the method of preparation of test piece joints, and the tests to be carried out on these joints
for assessing the fitness for purpose of the system under normal and extreme conditions.
It specifies the test parameters for the test methods referred to in this document.
NOTE 1 This document is intended only to be used by the product manufacturer to assess the performance of
components according to EN 1555-2, EN 1555-3, and/or EN 1555-4 when joined together under normal and
extreme conditions in accordance with this document. It is not intended for on-site testing of pipe systems.
In conjunction with Parts 1 to 4 of EN 1555, it is applicable to PE pipes, fittings, valves, their joints and to
joints with components of other materials intended to be used under the following conditions:
1
a) a maximum operating pressure, MOP, up to and including 10 bar ;
b) an operating temperature of 20 °C as reference temperature.
NOTE 2 For other operating temperatures, derating coefficients can be used, see Annex A.
EN 1555 (all parts) covers a range of maximum operating pressures and gives requirements concerning
colours and additives.
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.
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 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
prEN 1555-3:2019, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 3:
Fittings
prEN 1555-4:2019, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 4:
Valves
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 1167-2, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination
of the resistance to internal pressure — Part 2: Preparation of pipe test pieces (ISO 1167-2)

1 1 bar = 0,1 MPa.
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oSIST prEN 1555-5:2019
prEN 1555-5:2019 (E)
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 13477, Thermoplastics pipes for the conveyance of fluids — Determination of resistance to rapid
crack propagation (RCP) — Small-scale steady-state test (S4 test) (ISO 13477)
EN ISO 13478, Thermoplastics pipes for the conveyance of fluids — Determination of resistance to rapid
crack propagation (RCP) — Full scale test (FST) (ISO 13478)
ISO 11413:2019, Plastics pipes and fittings — Preparation of test piece assemblies between a
polyethylene (PE) pipe and an electrofusion fitting
ISO 11414:2009, Plastics pipes and fittings — Preparation of polyethylene (PE) pipe/pipe or pipe/fitting
test piece assemblies by butt fusion
ISO 13953, Polyethylene (PE) pipes and fittings — Determination of the tensile strength and failure mode
of test pieces from a butt-fused joint
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 — Determination of cohesive strength — Evaluation of ductility of
fusion joint interface by tear test
ISO 17885, Plastics piping systems — Mechanical fittings for pressure piping systems — Specifications
3 Terms and definitions
For the purposes of this document, the terms and definitions, symbols and abbreviations given in
prEN 1555-1:2019 and the following definition 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 http://www.iso.org/obp
3.1
mechanical joint
joint made by assembling a PE pipe with a fitting that generally includes a compression part to provide
for pressure integrity, leaktightness and resistance to end loads
Note 1 to entry A support sleeve inserted into the pipe bore should be used to provide a permanent support for
the PE pipe to prevent creep in the pipe wall under radial compressive forces. The metallic part of this fitting can be
assembled to a metallic pipe by screw threads, compression joints, welded or brazed flanges or by other means
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oSIST prEN 1555-5:2019
prEN 2019:2019 (E)
4 Fitness for purpose
4.1 Method of preparation of assemblies for testing
4.1.1 General
The joints shall be made by using pipes conforming to prEN 1555-2:2019, fittings conforming to
prEN 1555-3:2019 or valves conforming to prEN 1555-4:2019.
Test pieces for p
...