EN ISO 16486-2:2024

Plastics piping systems for the supply of gaseous fuels - Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing - Part 2: Pipes (ISO 16486‑2:2024)

This document specifies the physical and mechanical properties of pipes made from unplasticized polyamide (PA-U) in accordance with ISO 16486-1, intended to be buried and used for the supply of gaseous fuels.
It also specifies the test parameters for the test methods to which it refers.
The ISO 16486 series is applicable to PA-U piping systems, the components of which are connected by fusion jointing and/or mechanical jointing.
In particular, this document lays down dimensional characteristics and requirements for the marking of pipes.
Pipes conforming to this document are jointed typically by using mechanical, electrofusion or butt fusion techniques.

Kunststoff‑Rohrleitungssysteme für die Gasversorgung - Rohrleitungssysteme aus weichmacherfreiem Polyamid (PA‑U) mit Schweißverbindungen und mechanischen Verbindungen - Teil 2: Rohre (ISO 16486‑2:2024)

Dieses Dokument legt die physikalischen und mechanischen Eigenschaften von Rohren fest, die nach ISO 16486 1 aus weichmacherfreiem Polyamid (PA U) hergestellt und dafür vorgesehen sind, unterirdisch verlegt und für die Gasversorgung verwendet zu werden.
Es legt auch die Prüfparameter für die Prüfverfahren fest, auf die es sich bezieht.
Die Normenreihe ISO 16486 ist anwendbar für PA U Rohrleitungssysteme, deren Komponenten durch Schweißverbindungen und/oder mechanische Verbindungen zusammengefügt werden.
Dieses Dokument legt insbesondere Maßeigenschaften und Anforderungen an die Kennzeichnung von Rohren fest.
Rohre, die diesem Dokument entsprechen, werden üblicherweise unter Verwendung von mechanischen, Heizwendelschweiß  oder Stumpfschweißtechniken zusammengefügt.

Systèmes de canalisations en matières plastiques pour la distribution de combustibles gazeux - Systèmes de canalisations en polyamide non plastifié (PA-U) avec assemblages par soudage et assemblages mécaniques - Partie 2: Tubes (ISO 16486‑2:2024)

Le présent document spécifie les propriétés physiques et mécaniques des tubes en polyamide non plastifié (PA-U) conformément à l’ISO 16486-1, destinés à être enterrés et utilisés pour la distribution de combustibles gazeux.
Il spécifie également les paramètres d’essai pour les méthodes d’essai auxquelles il fait référence.
La série ISO 16486 s’applique aux systèmes de canalisations en PA-U dont les composants sont raccordés par des assemblages par soudage et/ou par des assemblages mécaniques.
En particulier, le présent document définit les caractéristiques dimensionnelles et les exigences pour le marquage des tubes.
Les tubes conformes au présent document sont généralement assemblés par des techniques mécaniques, par électrosoudage ou par soudage bout à bout.

Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Cevni sistemi iz nemehčanega poliamida (PA-U) z zvari in mehanskimi spoji - 2. del: Cevi (ISO 16486-2:2024)

Ta dokument določa fizikalne in mehanske lastnosti cevi iz nemehčanega poliamida (PA-U) v skladu s standardom ISO 16486-1, ki so predvidene za vkop in uporabo za namene oskrbe s plinastimi gorivi.
Določa tudi preskusne parametre za preskusne metode, na katere se sklicuje.
Skupina standardov ISO 16486 se uporablja za cevne sisteme iz nemehčanega poliamida, sestavni deli katerih so povezani z zvari in/ali mehanskimi spoji.
Ta dokument zlasti določa dimenzijske lastnosti in zahteve za označevanje cevi.
Cevi, ki so skladne s tem dokumentom, so običajno spojene z mehanskimi tehnikami, elektrofuzijo ali soležnim taljenjem.

General Information

• Status: Published
• Publication Date: 12-Nov-2024
• ICS: 75.200 - Petroleum products and natural gas handling equipment
• ICS: 83.140.30 - Plastics pipes and fittings for non fluid use
• Technical Committee: CEN/TC 155 - Plastics piping systems and ducting systems
• Drafting Committee: CEN/TC 155/WG 34 - Polyamid piping systems for gas supply
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 13-Nov-2024
• Completion Date: 13-Nov-2024
• Ref Project: SIST EN ISO 16486-2:2025 - Plastics piping systems for the supply of gaseous fuels - Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing - Part 2: Pipes (ISO 16486-2:2024)

Relations

• Replaces: EN ISO 16486-2:2020 - Plastics piping systems for the supply of gaseous fuels - Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing - Part 2: Pipes (ISO 16486-2:2020)
• Effective Date: 26-Jul-2023
• Amended By: EN ISO 16486-2:2024/A11:2025 - Plastics piping systems for the supply of gaseous fuels - Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing - Part 2: Pipes
• Effective Date: 25-Jun-2025

Overview

EN ISO 16486-2:2024 - Plastics piping systems for the supply of gaseous fuels - Part 2 specifies requirements for pipes made from unplasticized polyamide (PA‑U) intended to be buried and used in gas supply networks. Adopted by CEN (November 2024) and aligned with ISO 16486‑1, this part defines the physical and mechanical properties, test parameters, dimensional characteristics and marking rules for PA‑U pipes used with fusion and mechanical jointing techniques.

Keywords: EN ISO 16486-2:2024, PA‑U, unplasticized polyamide, plastics piping systems, gaseous fuels, buried gas supply.

Key Topics and Requirements

• Material and compound - Pipes made of unplasticized polyamide (PA‑U) manufactured in accordance with ISO 16486‑1.
• Physical and mechanical properties - Clauses cover conditioning, required mechanical performance and physical characteristics (see Clauses 7 and 8).
• Geometrical characteristics - Measurement of dimensions, mean outside diameters, out‑of‑roundness, wall thickness (minimum and tolerances) and related testing (Clause 6).
• Jointing compatibility - Design and testing assume connection by mechanical jointing, electrofusion or butt fusion; fusion compatibility requirements are specified.
• Marking and identification - Mandatory marking elements and format to ensure traceability and correct use (Clause 9).
• Test parameters and methods - Defines parameters for referenced test methods so laboratories and manufacturers use consistent procedures.
• Installation-related guidance - Includes annexes such as a normative squeeze‑off technique (Annex A) and informative data on water uptake over time as a function of sample thickness (Annex B).
• Hydrogen note - ISO 16486‑1 (and the Introduction to this part) provides information on PA‑U suitability for hydrogen and hydrogen‑natural gas blends.

Applications and Who Uses the Standard

• Gas network operators and utilities - specifying buried distribution mains and service lines using PA‑U piping.
• Manufacturers and suppliers - ensuring pipes meet required dimensional, mechanical and marking rules for market access in CEN/ISO regions.
• Designers and specifiers - selecting compatible jointing methods (electrofusion, butt fusion, mechanical) and verifying fusion parameters covered elsewhere in the ISO 16486 series.
• Testing and certification laboratories - performing tests using the standardized test parameters given in this document.
• Installation contractors and fusion operators - referencing the standard alongside ISO 16486‑6 (installation practice) and training guidance (ISO/TS 16486‑8).

Related Standards

• ISO 16486‑1 - general requirements for PA‑U piping systems (material and components)
• ISO 16486‑3, ‑4, ‑5, ‑6 - components, system fitness for purpose, recommended installation practices
• ISO/TS 16486‑7, ‑8 - conformity assessment and training for fusion operators
• CEN/TS 12007‑6 - related CEN guidance on installation practice for gas infrastructure

EN ISO 16486‑2:2024 is essential for stakeholders involved in the specification, manufacture, testing and installation of underground PA‑U gas piping systems, helping ensure safety, compatibility and traceability across the supply chain.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2025
Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Cevni sistemi
iz nemehčanega poliamida (PA-U) z zvari in mehanskimi spoji - 2. del: Cevi (ISO
16486-2:2024)
Plastics piping systems for the supply of gaseous fuels - Unplasticized polyamide (PA-U)
piping systems with fusion jointing and mechanical jointing - Part 2: Pipes (ISO 16486-
2:2024)
Kunststoff-Rohrleitungssysteme für die Gasversorgung - Rohrleitungssysteme aus
weichmacherfreiem Polyamid (PA-U) mit Schweißverbindungen und mechanischen
Verbindungen - Teil 2: Rohre (ISO 16486-2:2024)
Systèmes de canalisations en matières plastiques pour la distribution de combustibles
gazeux - Systèmes de canalisations en polyamide non plastifié (PA-U) avec
assemblages par soudage et assemblages mécaniques - Partie 2: Tubes (ISO 16486-
2:2024)
Ta slovenski standard je istoveten z: EN ISO 16486-2:2024
ICS:
75.200 Oprema za skladiščenje Petroleum products and
nafte, naftnih proizvodov in natural gas handling
zemeljskega plina equipment
83.140.30 Polimerne cevi in fitingi za Plastics pipes and fittings for
snovi, ki niso tekočine non fluid use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 16486-2
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2024
EUROPÄISCHE NORM
ICS 75.200 Supersedes EN ISO 16486-2:2020
English Version
Plastics piping systems for the supply of gaseous fuels -
Unplasticized polyamide (PA-U) piping systems with
fusion jointing and mechanical jointing - Part 2: Pipes (ISO
16486-2:2024)
Systèmes de canalisations en matières plastiques pour Kunststoff-Rohrleitungssysteme für die Gasversorgung
la distribution de combustibles gazeux - Systèmes de - Rohrleitungssysteme aus weichmacherfreiem
canalisations en polyamide non plastifié (PA-U) avec Polyamid (PA-U) mit Schweißverbindungen und
assemblages par soudage et assemblages mécaniques - mechanischen Verbindungen - Teil 2: Rohre (ISO
Partie 2: Tubes (ISO 16486-2:2024) 16486-2:2024)
This European Standard was approved by CEN on 10 August 2024.

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 ISO 16486-2:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 16486-2:2024) has been prepared by Technical Committee ISO/TC 138
"Plastics pipes, fittings and valves for the transport of fluids" in collaboration with 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 May 2025, and conflicting national standards shall be
withdrawn at the latest by May 2025.
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 ISO 16486-2:2020.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations 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.
Endorsement notice
The text of ISO 16486-2:2024 has been approved by CEN as EN ISO 16486-2:2024 without any
modification.
International
Standard
ISO 16486-2
Third edition
Plastics piping systems for
2024-11
the supply of gaseous fuels —
Unplasticized polyamide (PA-U)
piping systems with fusion jointing
and mechanical jointing —
Part 2:
Pipes
Systèmes de canalisations en matières plastiques pour la
distribution de combustibles gazeux — Systèmes de canalisations
en polyamide non plastifié (PA-U) avec assemblages par soudage
et assemblages mécaniques —
Partie 2: Tubes
Reference number
ISO 16486-2:2024(en) © ISO 2024

ISO 16486-2:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 16486-2:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 Terms related to geometrical characteristics .2
3.2 Terms related to material .2
3.3 Terms related to joints .2
3.4 Abbreviated terms .3
4 Compound . 3
5 General characteristics . 3
5.1 Appearance .3
5.2 Colour .3
5.3 Fusion compatibility .3
6 Geometrical characteristics . 3
6.1 Measurement of dimensions .3
6.2 Mean outside diameters, out-of-roundness and their tolerances.3
6.3 Wall thicknesses and tolerances .4
6.3.1 Minimum wall thickness .4
6.3.2 Tolerances on wall thickness at any point .5
7 Mechanical characteristics . 6
7.1 Conditioning.6
7.2 Requirements .6
8 Physical characteristics . 9
8.1 Conditioning.9
8.2 Requirements .9
9 Marking . . 9
Annex A (normative) Squeeze-off technique .11
Annex B (informative) Examples of the water uptake over time as a function of the sample
thickness .12
Bibliography . 14

iii
ISO 16486-2:2024(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the
transport of fluids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels, in collaboration
with the European Committee for Standardization (CEN) Technical Committee CEN/TC 155, Plastics piping
systems and ducting systems, in accordance with the Agreement on technical cooperation between ISO and
CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 16486-2:2020), which has been technically
revised.
The main changes are as follows:
— the references in the Introduction have been updated;
— a Note has been added in the Introduction providing information on the suitability of PA-U pipe systems
for 100 % hydrogen and its admixtures with natural gas;
— the symbols that have been deleted in ISO 16486-1 (but that are used in this document) have been defined
in this document;
— a reference to ISO 12176-5 has been added in the Note in Clause 9;
— the Bibliography has been extended.
A list of all parts in the ISO 16486 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
ISO 16486-2:2024(en)
Introduction
This document specifies the requirements for a piping system and its components made from unplasticized
polyamide (PA-U), which is intended to be used for the supply of gaseous fuels.
NOTE 1 Additional information about the suitability of PA-U pipe systems for hydrogen and its admixtures is given
in ISO 16486-1:2023, Annex D.
Requirements and test methods for material and components of the piping system, are specified in
ISO 16486-1, ISO 16486-3 and ISO 16486-4.
Characteristics for fitness for purpose of the system and generic fusion parameters are covered in
ISO 16486-5.
Recommended practice for installation is given in ISO 16486-6, which will not be implemented as a European
Standard under the Vienna Agreement.
[5]
NOTE 2 Recommended practice for installation is also given in CEN/TS 12007-6, which has been prepared by
Technical Committee CEN/TC 234, Gas infrastructure.
Assessment of conformity of the system is covered by ISO/TS 16486-7.
Training and assessment of fusion operators is covered by ISO/TS 16486-8.
ISO 16486-1, ISO 16486-2, ISO 16486-3, ISO 16486-5, ISO 16486-6, ISO/TS 16486-7 and ISO/TS 16486-8
have been prepared by ISO/TC 138/SC 4. ISO 16486-4 has been prepared by ISO/TC 138/SC 7.

v
International Standard ISO 16486-2:2024(en)
Plastics piping systems for the supply of gaseous fuels —
Unplasticized polyamide (PA-U) piping systems with fusion
jointing and mechanical jointing —
Part 2:
Pipes
1 Scope
This document specifies the physical and mechanical properties of pipes made from unplasticized polyamide
(PA-U) in accordance with ISO 16486-1, intended to be buried and used for the supply of gaseous fuels.
It also specifies the test parameters for the test methods to which it refers.
The ISO 16486 series is applicable to PA-U piping systems, the components of which are connected by fusion
jointing and/or mechanical jointing.
In particular, this document lays down dimensional characteristics and requirements for the marking of pipes.
Pipes conforming to this document are jointed typically by using mechanical, electrofusion or butt fusion
techniques.
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.
ISO 291, Plastics — Standard atmospheres for conditioning and testing
ISO 307, Plastics — Polyamides — Determination of viscosity number
ISO 1133-2, Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of
thermoplastics — Part 2: Method for materials sensitive to time-temperature history and/or moisture
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 1167-2, 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 2505, Thermoplastics pipes — Longitudinal reversion — Test method and parameters
ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions
ISO 6259-1, Thermoplastics pipes — Determination of tensile properties — Part 1: General test method
ISO 6259-3, Thermoplastics pipes — Determination of tensile properties — Part 3: Polyolefin pipes
ISO 11922-1, Thermoplastics pipes for the conveyance of fluids — Dimensions and tolerances — Part 1: Metric series
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 16486-2:2024(en)
ISO 13479, Polyolefin pipes for the conveyance of fluids — Determination of resistance to crack propagation —
Test method for slow crack growth on notched pipes
ISO 16486-1, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U) piping
systems with fusion jointing and mechanical jointing — Part 1: General
EN 12106, Plastics piping systems - Polyethylene (PE) pipes - Test
...