Plastics piping systems for the supply of gaseous fuels - Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing - Part 5: Fitness for purpose of the system (ISO 16486-5:2021)

This part of ISO 16486 specifies the requirements of fitness for purpose of the unplasticized polyamide (PA-U) piping system, intended to be buried and used for the supply of gaseous fuels. It also specifies the definitions of electrofusion and butt fusion joints.
This part of ISO 16486 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 also specifies the test parameters for the test methods to which it refers.
ISO 16486 is applicable to PA-U piping systems the components of which are connected by fusion jointing and/or mechanical jointing.
In conjunction with the other parts of ISO 16486, it is applicable to PA-U fittings, their joints and to joints with components of PA-U.

Kunststoff-Rohrleitungssysteme für die Gasversorgung - Rohrleitungssysteme aus weichmacherfreiem Polyamid (PA-U) mit Schweißverbindungen und mechanischen Verbindungen - Teil 5: Gebrauchstauglichkeit des Systems (ISO 16486 5:2021)

Dieses Dokument legt die Anforderungen an die Gebrauchstauglichkeit von Rohrleitungssystemen aus weichmacherfreiem Polyamid (PA-U) fest, die unterirdisch verlegt und für die Gasversorgung verwendet werden sollen. Es legt auch die Definitionen von Heizwendel- und Stumpfschweißverbindungen fest.
Dieses Dokument legt das Herstellungsverfahren für Probekörperverbindungen und die an diesen Verbindungen vorzunehmenden Prüfungen fest, um die Gebrauchstauglichkeit des Systems unter normalen und unter extremen Bedingungen zu bewerten. Es legt darüber hinaus die Prüfparameter für die Prüfverfahren fest, auf die es sich bezieht.
Die Normenreihe ISO 16486 gilt für PA-U-Rohrleitungssysteme, deren Komponenten durch Schweißverbin-dungen und/oder mechanische Verbindungen zusammengefügt werden.
Zusammen mit den anderen Teilen der ISO 16486 gilt es für PA-U-Formstücke, ihre Verbindungen und für Verbindungen mit Komponenten aus PA-U.

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 5: Aptitude à l'emploi du système (ISO 16486-5:2021)

Le présent document spécifie les exigences d’aptitude à l’emploi du système de canalisations en polyamide non plastifié (PA-U) destiné à être enterré et utilisé pour la distribution de combustibles gazeux. Elle spécifie aussi les définitions d’électrosoudage et d’assemblage par soudage bout à bout.
Le présent document spécifie 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. Elle spécifie également les paramètres d’essai pour les méthodes d’essai auxquelles il est 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 conjonction avec les autres parties de l’ISO 16486, elle s’applique aux raccords en PA-U, à leurs assemblages et aux assemblages avec des composants en PA-U.

Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Cevni sistemi iz nemehčanega poliamida (PA-U) z zvari in mehanskimi spoji - 5. del: Ustreznost sistema namenu (ISO 16486-5:2021)

General Information

Status
Published
Public Enquiry End Date
04-Sep-2020
Publication Date
14-Jun-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
03-Jun-2021
Due Date
08-Aug-2021
Completion Date
15-Jun-2021

Buy Standard

Standard
SIST EN ISO 16486-5:2021
English language
23 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day
Draft
oSIST prEN ISO 16486-5:2020
English language
24 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 16486-5:2021
01-julij-2021

Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Cevni sistemi

iz nemehčanega poliamida (PA-U) z zvari in mehanskimi spoji - 5. del: Ustreznost
sistema namenu (ISO 16486-5:2021)

Plastics piping systems for the supply of gaseous fuels - Unplasticized polyamide (PA-U)

piping systems with fusion jointing and mechanical jointing - Part 5: Fitness for purpose

of the system (ISO 16486-5:2021)
Kunststoff-Rohrleitungssysteme für die Gasversorgung - Rohrleitungssysteme aus
weichmacherfreiem Polyamid (PA-U) mit Schweißverbindungen und mechanischen
Verbindungen - Teil 5: Gebrauchstauglichkeit des Systems (ISO 16486 5:2021)

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 5: Aptitude à l'emploi du

système (ISO 16486-5:2021)
Ta slovenski standard je istoveten z: EN ISO 16486-5:2021
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
SIST EN ISO 16486-5:2021 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN ISO 16486-5:2021
---------------------- Page: 2 ----------------------
SIST EN ISO 16486-5:2021
EN ISO 16486-5
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2021
EUROPÄISCHE NORM
ICS 75.200; 83.140.30
English Version
Plastics piping systems for the supply of gaseous fuels -
Unplasticized polyamide (PA-U) piping systems with
fusion jointing and mechanical jointing - Part 5: Fitness for
purpose of the system (ISO 16486-5:2021)

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 5:

Partie 5: Aptitude à l'emploi du système (ISO 16486- Gebrauchstauglichkeit des Systems (ISO 16486

5:2021) 5:2021)
This European Standard was approved by CEN on 14 May 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 ISO 16486-5:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 16486-5:2021
EN ISO 16486-5:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 16486-5:2021
EN ISO 16486-5:2021 (E)
European foreword

This document (EN ISO 16486-5:2021) 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 November 2021, and conflicting national standards

shall be withdrawn at the latest by November 2021.

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.

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, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 16486-5:2021 has been approved by CEN as EN ISO 16486-5:2021 without any

modification.
---------------------- Page: 5 ----------------------
SIST EN ISO 16486-5:2021
---------------------- Page: 6 ----------------------
SIST EN ISO 16486-5:2021
INTERNATIONAL ISO
STANDARD 16486-5
Second edition
2021-05
Plastics piping systems for the supply
of gaseous fuels — Unplasticized
polyamide (PA-U) piping systems
with fusion jointing and mechanical
jointing —
Part 5:
Fitness for purpose of the system
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 5: Aptitude à l'emploi du système
Reference number
ISO 16486-5:2021(E)
ISO 2021
---------------------- Page: 7 ----------------------
SIST EN ISO 16486-5:2021
ISO 16486-5:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 16486-5:2021
ISO 16486-5:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ................................................................................................................................................................................................................................vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Symbols .......................................................................................................................................................................................................................... 3

5 Fitness for purpose ............................................................................................................................................................................................ 3

5.1 Method of preparation of assemblies for testing ...................................................................................................... 3

5.1.1 General...................................................................................................................................................................................... 3

5.1.2 Butt fusion joints ............................................................................................................................................................. 3

5.1.3 Electrofusion jointing .................................................................................................................................................. 3

5.1.4 Transition fittings ...................................................................... ...................................................................................... 4

5.2 Requirements for fitness for purpose ................................................................................................................................. 4

5.2.1 Fitness for purpose for butt fusion joints ................................................................................................... 4

5.2.2 Fitness for purpose for electrofusion joints ............................................................................................. 5

5.2.3 Fitness for purpose for transition fittings .................................................................................................. 7

6 Design coefficient ................................................................................................................................................................................................ 7

Annex A (normative) Preparation of test assemblies by butt fusion .................................................................................. 8

Annex B (normative) Preparation of test assemblies by electrofusion ........................................................................11

Annex C (informative) Derating coefficients for operating temperatures .................................................................12

Annex D (normative) Rapid crack propagation (RCP) resistance of pipe at temperature less

than 0 °C ......................................................................................................................................................................................................................13

Bibliography .............................................................................................................................................................................................................................14

© ISO 2021 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 16486-5:2021
ISO 16486-5:2021(E)
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 documents 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).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

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 second edition cancels and replaces the first edition (ISO 16486-5:2012), which has been

technically revised.
The main changes compared to the previous edition are as follows:
— for transition fittings, reference is made to ISO 17885;
— new Clause 5, Design Coefficient, has been added;

— Annex A refers to ISO 11414 for test piece assemblies by butt fusion and has been brought in line

with ISO 12176-1 for butt fusion equipment.

— Annex A has been brought in line with ISO 21307, with a definition of PA fusion parameters for

the single low-pressure and the single high-pressure butt fusion jointing procedures (the dual low-

pressure procedure is not investigated for PA-U so far);

— in Table A.2 for the single low-pressure butt fusion procedure, the pressure, p , has been changed

from (0,3 ± 0,1) MPa to (0,3 ± 0,05) MPa to raise the minimum pressure from 0,2 MPa to 0,25 MPa;

— Annex B refers to ISO 11413 for test piece assemblies by electro fusion and to ISO 12176-2 for electro

fusion equipment;

— Annex C of ISO 16486-5:2012, Assessment of fitness for purpose of transition fittings, has been

deleted;

— new Annex C, Derating coefficients for operating temperatures, has been transferred from

ISO 16486-6;
iv © ISO 2021 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 16486-5:2021
ISO 16486-5:2021(E)

— new Annex D, Rapid crack propagation (RCP) resistance of pipe at temperature less than 0 °C, has

been added.
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.
© ISO 2021 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 16486-5:2021
ISO 16486-5:2021(E)
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.

Requirements and test methods for material and components of the piping system are specified in

ISO 16486-1, ISO 16486-2, ISO 16486-3, and ISO 16486-4.
This document covers the characteristics for fitness for purpose of the system.

Recommended practice for installation is given in ISO 16486-6, which will not be implemented as

European Standard under the Vienna Agreement.

NOTE 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 to form the subject the future ISO/TS 16486-7 .

1) Under preparation. Stage at the time of publication: ISO/AWI TS 16486-7:2021.

vi © ISO 2021 – All rights reserved
---------------------- Page: 12 ----------------------
SIST EN ISO 16486-5:2021
INTERNATIONAL STANDARD ISO 16486-5:2021(E)
Plastics piping systems for the supply of gaseous fuels —
Unplasticized polyamide (PA-U) piping systems with fusion
jointing and mechanical jointing —
Part 5:
Fitness for purpose of the system
1 Scope

This document specifies the requirements of fitness for purpose of unplasticized polyamide (PA-

U) piping system, intended to be buried and used for the supply of gaseous fuels. It also specifies the

definitions of electrofusion and butt fusion joints.

This document 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

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 conjunction with the other parts of ISO 16486, it is applicable to PA-U fittings, their joints and to

joints with components of PA-U.
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 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of

the resistance to internal pressure — Part 1: General method

ISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of

the resistance to internal pressure — Part 4: Preparation of assemblies

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 2021 – All rights reserved 1
---------------------- Page: 13 ----------------------
SIST EN ISO 16486-5:2021
ISO 16486-5:2021(E)

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

ISO 16486-2, 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 16486-3, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U)

piping systems with fusion jointing and mechanical jointing — Part 3: Fittings

ISO 16486-6, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U)

piping systems with fusion jointing and mechanical jointing — Part 6: Code of practice for design, handling

and installation

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 given in ISO 16486-1 and the following

apply.

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

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

joint between a PA-U electrofusion socket or saddle fitting and a pipe or a spigot end fitting

Note 1 to entry: The electrofusion fittings are heated by the Joule effect of the heating element incorporated at

their jointing surfaces, causing the material adjacent to them to melt and the pipe and fitting surfaces to fuse.

3.2
butt fusion joint

joint made by heating the planed ends of matching surfaces by holding them against a flat heating plate

until the PA-U material reaches fusion temperature, quickly removing the heating plate and pushing the

two softened ends against one another

Note 1 to entry: This definition refers to a butt fusion joint using a heating tool.

3.3
fusion compatibility

ability of two unplasticized polyamide materials of the same type to be fused together to form a joint

which conforms to the performance requirements of this part of ISO 16486
3.4
transition fitting

factory-made fitting that makes a transition joint (3.5) between a unplasticized polyamide (PA-U) piping

and a metallic pipe a
...

SLOVENSKI STANDARD
oSIST prEN ISO 16486-5:2020
01-september-2020

Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Cevni sistemi

iz nemehčanega poliamida (PA-U) z zvari in mehanskimi spoji - 5. del: Ustreznost
sistema namenu (ISO/DIS 16486-5:2020)

Plastics piping systems for the supply of gaseous fuels - Unplasticized polyamide (PA-U)

piping systems with fusion jointing and mechanical jointing - Part 5: Fitness for purpose

of the system (ISO/DIS 16486-5:2020)
Kunststoffe-Rohrleitungssysteme für die Gasversorgung - Rohrleitungssysteme aus
weichmacherfreiem Polyamid (PA-U) mit Schweißverbindungen und mechanischen
Verbindungen - Teil 5: Gebrauchstauglichkeit des Systems (ISO/DIS 16486-5:2020)

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 5: Aptitude à l'emploi du

système (ISO/DIS 16486-5:2020)
Ta slovenski standard je istoveten z: prEN ISO 16486-5
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
oSIST prEN ISO 16486-5:2020 en,fr,de

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

---------------------- Page: 1 ----------------------
oSIST prEN ISO 16486-5:2020
---------------------- Page: 2 ----------------------
oSIST prEN ISO 16486-5:2020
DRAFT
EUROPEAN STANDARD
prEN ISO 16486-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2020
ICS 75.200; 83.140.30
English Version
Plastics piping systems for the supply of gaseous fuels -
Unplasticized polyamide (PA-U) piping systems with
fusion jointing and mechanical jointing - Part 5: Fitness for
purpose of the system (ISO/DIS 16486-5:2020)

Systèmes de canalisations en matières plastiques pour Kunststoffe-Rohrleitungssysteme für die

la distribution de combustibles gazeux - Systèmes de Gasversorgung - Rohrleitungssysteme aus

canalisations en polyamide non plastifié (PA-U) avec weichmacherfreiem Polyamid (PA-U) mit

assemblages par soudage et assemblages mécaniques - Schweißverbindungen und mechanischen

Partie 5: Aptitude à l'emploi du système (ISO/DIS Verbindungen - Teil 5: Gebrauchstauglichkeit des

16486-5:2020) Systems (ISO/DIS 16486-5:2020)

This draft European Standard is submitted to CEN members for parallel 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

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN ISO 16486-5:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN ISO 16486-5:2020
prEN ISO 16486-5:2020 (E)
Contents Page

European foreword ...................................................................................................................................... 3

Annex (informative) A-deviation ........................................................................................................... 4

---------------------- Page: 4 ----------------------
oSIST prEN ISO 16486-5:2020
prEN ISO 16486-5:2020 (E)
European foreword

This document (prEN ISO 16486-5) 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 document is currently submitted to the parallel Enquiry.
Endorsement notice

The text of ISO/DIS 16486-5 has been approved by CEN as prEN ISO 16486-5 without any

modification.
---------------------- Page: 5 ----------------------
oSIST prEN ISO 16486-5:2020
prEN ISO 16486-5:2020 (E)
Annex
(informative)
A-deviation

A-deviation: National deviation due to regulations, the alteration of which is for the time being outside the competence of the CEN-

CENELEC national member.
This European Standard does not fall under any Directive of the EU.

In the relevant CEN-CENELEC countries these A-deviations are valid instead of the provisions of the European Standard until they

have been removed.
Country Clause Deviation

ITALY §1 According to Italian legislation concerning the safety of gas installation

Scope

- DM 16 April 2008 (DSO) prescribes that piping and components used in distribution system shall be in accordance with

national standard UNI 9034 (pipes with MOP below 5 bar). In case of MOP greater than 5 bar DM 17 April 2008 shall be

followed.
(Official Journal Italian Republic GU n. 107 of 8 May 2008
https://www.gazzettaufficiale.it/eli/id/2008/05/08/08A02871/sg)

- DM 17 April 2008 (TSO) prescribes that piping and components used in transmission system shall be made of steel (art.

3.1 of Technical Annex A to Decree).
(Official Journal Italian Republic GU n. 107 of 8 May 2008

https://www.gazzettaufficiale.it/atto/serie_generale/caricaDettaglioAtto/originario?atto.dataPubblicazioneGazzetta=2008-

05-08&atto.codiceRedazionale=08A02872&elenco30giorni=false)
---------------------- Page: 6 ----------------------
oSIST prEN ISO 16486-5:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 16486-5
ISO/TC 138/SC 4 Secretariat: NEN
Voting begins on: Voting terminates on:
2020-06-08 2020-08-31
Plastics piping systems for the supply of gaseous fuels —
Unplasticized polyamide (PA-U) piping systems with fusion
jointing and mechanical jointing —
Part 5:
Fitness for purpose of the system

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 5: Aptitude à l'emploi du système
ICS: 83.140.30; 75.200
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 16486-5:2020(E)
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. ISO 2020
---------------------- Page: 7 ----------------------
oSIST prEN ISO 16486-5:2020
ISO/DIS 16486-5:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 8 ----------------------
oSIST prEN ISO 16486-5:2020
ISO/DIS 16486-5:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ................................................................................................................................................................................................................................vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

3.1 Terms and definitions — General ........................................................................................................................................... 2

3.2 Symbols ......................................................................................................................................................................................................... 3

4 Fitness for purpose ............................................................................................................................................................................................ 3

4.1 Method of preparation of assemblies for testing ...................................................................................................... 3

4.1.1 General...................................................................................................................................................................................... 3

4.1.2 Butt fusion joints ............................................................................................................................................................. 3

4.1.3 Electrofusion jointing .................................................................................................................................................. 3

4.1.4 Transition fittings ...................................................................... ...................................................................................... 4

4.2 Requirements for fitness for purpose ................................................................................................................................. 4

4.2.1 Fitness for purpose for butt fusion joints ................................................................................................... 4

4.2.2 Fitness for purpose for electrofusion joints ............................................................................................. 5

4.2.3 Fitness for purpose for transition fittings .................................................................................................. 7

5 Design Coefficient ................................................................................................................................................................................................ 7

Annex A (normative) Preparation of test assemblies by butt fusion .................................................................................. 8

Annex B (normative) Preparation of test assemblies by electrofusion ........................................................................11

Annex C (normative) Derating coefficients for operating temperatures ....................................................................12

Annex D (normative) Rapid crack propagation (RCP) resistance of pipe at temperature less

than 0 °C ......................................................................................................................................................................................................................13

Bibliography .............................................................................................................................................................................................................................14

© ISO 2020 – All rights reserved iii
---------------------- Page: 9 ----------------------
oSIST prEN ISO 16486-5:2020
ISO/DIS 16486-5:2020(E)
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 documents 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).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

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/TC138, Plastics pipes, fittings and valves for

the transport of fluids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels.

This second edition cancels and replaces the first edition (ISO 16486-5:2012), which has been

technically revised.
The main changes compared to the previous edition are as follows:
— For transition fittings, reference is made to ISO 17885;
— New chapter 5 design coefficient is added;

— Normative Annex A refers to ISO 11414 for test piece assemblies by butt fusion and is brought in line

with ISO 12176-1 for butt fusion equipment

— Normative Annex A is brought in line with ISO 21307, with definition of PA fusion parameters for

the single low-pressure and the single high pressure butt fusion jointing procedures (the dual low-

pressure procedure is not investigated so far for PA-U);

— In Table A.2 for the single low pressure butt fusion procedure, the pressure p is changed from 0,3

± 0,1 MPa to 0,3 ± 0,05 MPa to rise the minimal pressure from 0,2 MPa to 0,25 MPa

— Normative Annex B refers to ISO 11413 for test piece assemblies by electro fusion and to ISO 12176-2

for electro fusion equipment;

— Normative Annex C of ISO 16486-5:2012 Assessment of fitness for purpose of transition fittings is

deleted.

— New normative Annex C derating coefficients for operating temperatures is transferred from part

-6 of this standard

— New normative Annex D rapid crack propagation (RCP) resistance of pipe at temperature less than

0 °C is added.
iv © ISO 2020 – All rights reserved
---------------------- Page: 10 ----------------------
oSIST prEN ISO 16486-5:2020
ISO/DIS 16486-5:2020(E)

ISO 16486 consists of the following parts, under the general title Plastics piping systems for the supply

of gaseous fuels — Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical

jointing:
Part 1: General
Part 2: Pipes
Part 3: Fittings
Part 4: Valves
Part 5: Fitness for purpose of the system
Part 6: Code of practice for design, handling and installation

Assessment of conformity of the system is to form the subject of a future part 7.

A list of all parts in the ISO 16486 series can also be found on the ISO website.

Parts 1, 2. 3, 5 (this document), and 6 have been prepared by ISO/TC138/SC4, and a future part

7: Assessment of conformity is under preparation. Part 4 has been prepared by Technical Committee

ISO/TC138/SC 7 Valves and auxiliary equipment of plastics materials.
Part 6 will not be implemented as European Standard under the Vienna Agreement.

NOTE Future CEN/TS 12007-x, Gas infrastructure — Pipelines for maximum operating pressure up to and

including 16 bar — Part x: Design, handling, installation and operation of unplasticized polyamide (PA-U) piping

systems with fusion joining and mechanical jointing - Functional recommendation, to be prepared by Technical

Committee CEN/TC234 Gas infrastructure will deal with the recommended practice for installation of plastics

pipes system in accordance with EN ISO 16486 (all parts except for part 6).

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.
© ISO 2020 – All rights reserved v
---------------------- Page: 11 ----------------------
oSIST prEN ISO 16486-5:2020
ISO/DIS 16486-5:2020(E)
Introduction

This part of ISO 16486 specifies the requirements for a piping system and its components made from

unplasticized polyamide (PA-U), and which is intended to be used for the supply of gaseous fuels.

Requirements and test methods for material and components of the piping system are specified in

ISO 16486-1, ISO 16486-2, ISO 16486-3, and ISO 16486-4.

This part 5 of ISO 16486 covers the characteristics for fitness for purpose of the system.

[1]

Recommended practice for installation is given in ISO 16486-6 . ISO 16486-6 will not be implemented

as European Standard under the Vienna Agreement. Recommended practice for installation will be

given in future CEN/TS 12007-x, Gas infrastructure — Pipelines for maximum operating pressure up to

and including 16 bar — Part x: Design, handling, installation and operation of unplasticized polyamide (PA-

U) piping systems with fusion joining and mechanical jointing - Functional recommendation, that is under

preparation by Technical Committee CEN/TC234 Gas infrastructure.

Assessment of conformity of the system is to form the subject of a future part 7.

vi © ISO 2020 – All rights reserved
---------------------- Page: 12 ----------------------
oSIST prEN ISO 16486-5:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 16486-5:2020(E)
Plastics piping systems for the supply of gaseous fuels —
Unplasticized polyamide (PA-U) piping systems with fusion
jointing and mechanical jointing —
Part 5:
Fitness for purpose of the system
1 Scope

This part of ISO 16486 specifies the requirements of fitness for purpose of the unplasticized polyamide

(PA-U) piping system, intended to be buried and used for the supply of gaseous fuels. It also specifies

the definitions of electrofusion and butt fusion joints.

This part of ISO 16486 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 also specifies the test parameters for the test methods to which it refers.

ISO 16486 is applicable to PA-U piping systems the components of which are connected by fusion

jointing and/or mechanical jointing.

In conjunction with the other parts of ISO 16486, it is applicable to PA-U fittings, their joints and to

joints with components of PA-U.
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 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of

the resistance to internal pressure — Part 1: General method

ISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of

the resistance to internal pressure — Part 4: Preparation of assemblies

ISO 11413, Plastics pipes and fittings — Preparation of test piece assemblies between a polyethylene (PE)

pipe and an electrofusion fitting

ISO 11414, Plastics pipes and fittings — Preparation of polyethylene (PE) pipe/pipe or pipe/fitting test

piece assemblies by butt fusion

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

Butt fusion

ISO 12176-2, Plastics pipes and fittings — Equipment for fusion jointing polyethylene systems — Part 2:

Electrofusion

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 2020 – All rights reserved 1
---------------------- Page: 13 ----------------------
oSIST prEN ISO 16486-5:2020
ISO/DIS 16486-5:2020(E)

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 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

ISO 16486-2, 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 16486-3, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U)

piping systems with fusion jointing and mechanical jointing — Part 3: Fittings

ISO 16486-4, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U)

piping systems with fusion jointing and mechanical jointing — Part 4: Valves

ISO 17885, Plastics piping systems — Mechanical fittings for pressure piping systems —Specifications

ISO 21307, Plastics pipes and fittings — Butt fusion jointing procedures for polyethylene (PE) piping systems

3 Terms and definitions
3.1 Terms and definitions — General
3.1.1
electrofusion joint

joint between a PA-U electrofusion socket or saddle fitting and a pipe or a spigot end fitting

Note 1 to entry: The electrofusion fittings are heated by the Joule effect of the heating element incorporated at

their jointing surfaces, causing the material adjacent to them to melt and the pipe and fitting surfaces to fuse.

3.1.2
butt fusion joint (using heated tool)

joint made by heating the planed ends the surfaces of which match by holding them against a flat

heating plate until the PA-U material reaches fusion temperature, removing the heating plate quickly

and pushing the two softened ends against one another
3.1.3
fusion compatibility

ability of two unplasticized polyamide materials of the same type to be fused together to form a joint

which conforms to the performance requirements of this part of ISO 16486
3.1.4
transition fitting

Factory made fitting that makes a transition joint between a unplasticized polyamide (PA-U) piping and

a metallic pipe as described in ISO 16486-3.

Note 1 to entry: The metallic parts of the fitting may be assembled to metallic pipes by screw threads, compression

joints, welded or flanged connections. The fitting can allow for either a dismountable or permanently assembled

joint. In some cases, the supporting ring may also act as a grip ring.
3.1.5
transition joint

joint at which two different piping materials (the PA-U and metal piping) are connected

2 © ISO 2020 – All rights reserved
---------------------- Page: 14 ----------------------
oSIST prEN ISO 16486-5:2020
ISO/DIS 16486-5:2020(E)
3.1.6
anodeless riser

type of transition fitting which is designed to transport gas from an underground unplasticized

polyamide (PA-U) service line to above-ground steel piping

Note 1 to entry: In an anodeless riser, the PA-U pipe is always the gas carrier, at least, in the below ground section.

3.2 Symbols
en nominal pipe wall thickness
dn nominal external diameter of the pipe
p pressure applied to the butt-fusion joint interface
t duration of each phase in the fusion cycle
Tnom nominal temperature, (23 ± 2) °C
Tmax maximum permissible ambient temperature
Tmin minimum permissible ambient temperature
T ambient temperature at which the joint is made

Note to entry 1: The ambient temperature may vary from the minimum temperature, T , to the maxi-

min

mum temperature, T , as defined by agreement between the manufacturer and the purchaser.

max
L brittle decohesion length in percentage as calculated in ISO 13956
A brittle decohesion area in percentage as calculated in ISO 13956
L heated length within socket (see ISO 16486 -3, )

Note to entry 2: As declared by the manufacturer to be the nominal length of the fusion zone, see

ISO 16486-3 figure 1.
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 ISO 16486-2 and/or fittings conforming to

ISO 16486-3.

Test pieces for pressure test shall be closed with pressure-tight, end-load-bearing end caps, plugs or

flanges, which shall be provided with connections for the entry of water and release of air.

4.1.2 Butt fusion joints

PA-U pipes and spigot end fittings intended to be used for jointing by butt fusion shall be prepared and

assembled in accordance with Annex A.
4.1.3 Electrofusion jointing

PA-U pipes and fittings intended to be used for jointing by electrofusion shall be prepared and assembled

in accordance with Annex B.
© ISO 2020 – All rights reserved 3
---------------------- Page: 15 ----------------------
oSIST prEN ISO 16486-5:2020
ISO/DIS 16486-5:2020(E)

For joints with electrofusion socket fittings and joints with electrofusion saddle fittings, test joints

shall be prepared to check the fitness for purpose of the fittings under extreme jointing conditions.

For joints with electrofusion saddle fittings, the electrofusion saddle fitting shall be fused to the pipe,

while it is pneumatically pressurized to the allowable maximum operating pressure. The pipe shall be

cut immediately after the manufacturer-prescribed cooling time has elapsed.

These joints with electrofusion saddle fitting should be prepared taking national safety regulations

into consideration.

For straight equal electrofusion socket fittings (couplers), test joints on selected diameters out of the

product range shall be prepared with a gap of 0,05d between the pipe end and the maximum theoretical

depth of penetration of the fitting, where for diameters greater than 225 mm, the adjoining pipes shall

be arranged to provide the maximum angular deflection possible for the fitting, limited to 1,5°.

4.1.4 Transition fittings

For transition fittings, the assembly of PA pipe and fitting shall be prepared in accordance with

ISO17885 as applicable.

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.
4.2 Requirements for fitness for purpose
4.2.1 Fitness for purpose for butt fusion joints
4.2.1.1 Under normal conditions — Ambient temperature 23 °C

For the assessment of fitness for purpose under normal conditions, butt fusion joints shall have the

characteristic of tensile strength conforming to the requirement given in Table 5, using the parameters

as specified in Annex A, Table A.2 and Table A.3, at an ambient temperature of (23 ± 2) °C and the

scheme listed in Table 1.
Table 1 — Scheme for butt fusion joints
Pipe/spigot end fitting Pipe
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.