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 16486-3:2020)

This part of ISO 16486 specifies the physical and mechanical properties of fittings 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.
ISO 16486 is applicable to PA-U piping systems the components of which are connected by fusion jointing and/or mechanical jointing.
In addition, it lays down dimensional characteristics and requirements for the marking of fittings.
In conjunction with the other parts of ISO 16486, it is applicable to PA-U fittings, their joints, to joints with components of PA-U and to joints with mechanical fittings of other materials, and to the following fitting types:
    — fusion fittings — electrofusion fittings and butt fusion fittings;
    — transition fittings.

Kunststoff-Rohrleitungssysteme für die Gasversorgung - Rohrleitungssysteme aus weichmacherfreiem Polyamid (PA-U) mit Schweißverbindungen und mechanischen Verbindungen - Teil 3: Formstücke (ISO 16486-3:2020)

Dieses Dokument legt die physikalischen und mechanischen Eigenschaften von Formstücken fest, die nach ISO 16486 1 aus weichmacherfreiem Polyamid (PA U) hergestellt sind, die unterirdisch verlegt und für die Gasversorgung verwendet werden sollen.
Es spezifiziert ebenso die Prüfparameter für die Prüfverfahren, auf die es sich bezieht.
Die Normenreihe ISO 16486 gilt für PA U-Rohrleitungssysteme, deren Komponenten durch Schweißverbindungen und/oder mechanische Verbindungen zusammengefügt werden.
Außerdem legt es Maßeigenschaften und Anforderungen an die Kennzeichnung von Formstücken fest.
Zusammen mit den anderen Teilen der Normenreihe ISO 16486 gilt dieses Dokument für PA U-Formstücke, ihre Verbindungen, Verbindungen mit Komponenten aus PA U und Verbindungen mit mechanischen Formstücken aus anderen Werkstoffen sowie für die folgenden Arten von Formstücken:
- Schweißformstücke (Elektroschweiß- und Stumpfschweiß-Formstücke) und
- Übergangsformstücke.

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 3: Raccords (ISO 16486-3:2020)

Le présent document spécifie les propriétés physiques et mécaniques des raccords 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.
De plus, elle définit les caractéristiques dimensionnelles et les exigences pour le marquage des raccords.
En conjonction avec les autres parties de la série ISO 16486, le présent document s'applique aux raccords en PA‑U, à leurs assemblages, aux assemblages avec des composants en PA‑U, aux assemblages avec des raccords mécaniques fabriqués en autres matières, ainsi qu'avec les types de raccords suivants:
—          les raccords soudables (raccords électrosoudables et raccords par soudage bout à bout), et
—          les raccords de transition.

Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Cevni sistemi iz nemehčanega poliamida (PA-U) z zvari in mehanskimi spoji - 3. del: Fitingi (ISO 16486-3:2020)

General Information

Status
Published
Public Enquiry End Date
09-Dec-2020
Publication Date
12-Oct-2020
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
08-Oct-2020
Due Date
13-Dec-2020
Completion Date
13-Oct-2020

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SLOVENSKI STANDARD
SIST EN ISO 16486-3:2020
01-november-2020

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

iz nemehčanega poliamida (PA-U) z zvari in mehanskimi spoji - 3. del: Fitingi (ISO

16486-3:2020)

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-

3:2020)
Kunststoff-Rohrleitungssysteme für die Gasversorgung - Rohrleitungssysteme aus
weichmacherfreiem Polyamid (PA-U) mit Schweißverbindungen und mechanischen
Verbindungen - Teil 3: Formstücke (ISO 16486-3:2020)

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 3: Raccords (ISO 16486

-3:2020)
Ta slovenski standard je istoveten z: EN ISO 16486-3:2020
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 16486-3:2020 en

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

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SIST EN ISO 16486-3:2020
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SIST EN ISO 16486-3:2020
EN ISO 16486-3
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2020
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 3: Fittings
(ISO 16486-3:2020)

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 3: Formstücke

Partie 3: Raccords (ISO 16486-3:2020) (ISO/FDIS 16486-3:2020)
This European Standard was approved by CEN on 21 September 2020.

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

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16486-3:2020 E

worldwide for CEN national Members.
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SIST EN ISO 16486-3:2020
EN ISO 16486-3:2020 (E)
Contents Page

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

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SIST EN ISO 16486-3:2020
EN ISO 16486-3:2020 (E)
European foreword

This document (EN ISO 16486-3:2020) 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 March 2021, and conflicting national standards shall

be withdrawn at the latest by March 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 16486-3:2020 has been approved by CEN as EN ISO 16486-3:2020 without any

modification.
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SIST EN ISO 16486-3:2020
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SIST EN ISO 16486-3:2020
INTERNATIONAL ISO
STANDARD 16486-3
Second edition
2020-09
Plastics piping systems for the supply
of gaseous fuels — Unplasticized
polyamide (PA-U) piping systems
with fusion jointing and mechanical
jointing —
Part 3:
Fittings
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 3: Raccords
Reference number
ISO 16486-3:2020(E)
ISO 2020
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SIST EN ISO 16486-3:2020
ISO 16486-3:2020(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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
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SIST EN ISO 16486-3:2020
ISO 16486-3:2020(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ..............................................................................................................................................................................................................................vii

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

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

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

4 Material .......................................................................................................................................................................................................................... 3

4.1 PA-U compound ...................................................................................................................................................................................... 3

4.2 Material for non-unplasticized polyamide parts ....................................................................................................... 3

4.2.1 General...................................................................................................................................................................................... 3

4.2.2 Metal parts ............................................................................................................................................................................ 4

4.2.3 Elastomers ............................................................................................................................................................................. 4

4.2.4 Other materials ................................................................................................................................................................. 4

5 General characteristics .................................................................................................................................................................................. 4

5.1 Appearance ................................................................................................................................................................................................ 4

5.2 Design ............................................................................................................................................................................................................. 4

5.3 Colour .............................................................................................................................................................................................................. 4

5.4 Electrical characteristics for electrofusion fittings .................................................................................................. 4

5.5 Appearance of factory-made fusion joints ...................................................................................................................... 5

5.6 Fusion compatibility .......................................................................................................................................................................... 5

5.7 Appearance of transition fittings............................................................................................................................................. 5

6 Geometrical characteristics ...................................................................................................................................................................... 6

6.1 Measurement of dimensions ....................................................................................................................................................... 6

6.2 Dimensions of electrofusion sockets ................................................................................................................................... 6

6.2.1 Diameters and lengths of electrofusion sockets ................................................................................... 6

6.2.2 Wall thickness .................................................................................................................................................................... 6

6.3 Dimensions of spigot end fittings ........................................................................................................................................... 8

6.4 Dimensions of tapping tees .......................................................................................................................................................10

6.5 Dimensions of transition fittings to other materials ...........................................................................................11

7 Mechanical characteristics .....................................................................................................................................................................11

7.1 General ........................................................................................................................................................................................................11

7.2 Conditioning ...........................................................................................................................................................................................11

7.3 Mechanical requirements ...........................................................................................................................................................11

7.4 Additional requirements for transition fittings .......................................................................................................14

8 Physical characteristics ..............................................................................................................................................................................14

8.1 Conditioning ...........................................................................................................................................................................................14

8.2 Requirements ........................................................................................................................................................................................14

9 Chemical resistance of fittings in contact with chemicals ......................................................................................14

10 Performance requirements ....................................................................................................................................................................14

11 Marking .......................................................................................................................................................................................................................15

11.1 General ........................................................................................................................................................................................................15

11.2 Minimum required marking of fittings ...........................................................................................................................15

11.3 Additional information required on fitting or label .............................................................................................15

11.4 Fusion system recognition .........................................................................................................................................................16

12 Delivery conditions .........................................................................................................................................................................................16

Annex A (informative) Examples of typical terminal connections for electrofusion ......................................17

Annex B (normative) Short-term pressure test method ...............................................................................................................19

Annex C (normative) Tensile test fitting/pipe assemblies .........................................................................................................21

© ISO 2020 – All rights reserved iii
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SIST EN ISO 16486-3:2020
ISO 16486-3:2020(E)

Bibliography .............................................................................................................................................................................................................................23

iv © ISO 2020 – All rights reserved
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SIST EN ISO 16486-3:2020
ISO 16486-3:2020(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/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 16486-3:2012), which has been

technically revised. It also incorporates ISO 16486-3:2012/Amd 1:2014.
The main changes compared to the previous edition are as follows:

— In subclause 5.7, text concerning the exceptional use of flange adaptors is added;

— In Table 1, electro fusion socket length has been revised and the diameter range extended;

— Tables 1 and 3 are extended with nominal outside diameters up to and including 630 mm;

— Tables 3 to 5 have been reordered;

— An editorial mistake of 6 hours has been changed to 16 hours for conditioning before hydrostatic

strength testing in Table 4 and before internal pressure testing in Table 5;

— A NOTE to Table 6 and a footnote in Table 7 have been added to explain the limited use of MVR;

— For transition fittings, the reference to ISO 17885 has been introduced;

— For Fusion system recognition, reference is made to ISO 13950 and ISO 12176-4 and ISO 12176-5 ;

— The title of Clause 12 has changed from "Packaging" to "Delivery conditions”.

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

1) Under preparation. Stage at the time of publication: ISO/FDIS 12176-5:2020.
© ISO 2020 – All rights reserved v
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SIST EN ISO 16486-3:2020
ISO 16486-3:2020(E)

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.
vi © ISO 2020 – All rights reserved
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SIST EN ISO 16486-3:2020
ISO 16486-3:2020(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, other than fittings of the piping system,

are specified in ISO 16486-1, ISO 16486-2, 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.

Assessment of conformity of the system is to form the subject of future ISO/TS 16486-7 .

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.

Parts 1 to 7 of the ISO 16486 series have been prepared by ISO/TC 138/SC 4, with the exception of Part

4, which has been prepared by ISO/TC 138/SC 7.
2) Under preparation. Stage at the time of publication: ISO/WD TS 16486-7:2020.
© ISO 2020 – All rights reserved vii
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SIST EN ISO 16486-3:2020
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SIST EN ISO 16486-3:2020
INTERNATIONAL STANDARD ISO 16486-3:2020(E)
Plastics piping systems for the supply of gaseous fuels —
Unplasticized polyamide (PA-U) piping systems with fusion
jointing and mechanical jointing —
Part 3:
Fittings
1 Scope

This document specifies the physical and mechanical properties of fittings 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 addition, it lays down dimensional characteristics and requirements for the marking of fittings.

In conjunction with the other parts of the ISO 16486 series, this document is applicable to PA-U fittings,

their joints, joints with components of PA-U and joints with mechanical fittings of other materials, and

to the following fitting types:
— fusion fittings (electrofusion fittings and butt fusion fittings), and
— transition fittings.
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 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of

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

ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions

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

test method

ISO 11922-1, Thermoplastics pipes for the conveyance of fluids — Dimensions and tolerances — Part 1:

Metric series
© ISO 2020 – All rights reserved 1
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SIST EN ISO 16486-3:2020
ISO 16486-3:2020(E)

ISO 12176-4, Plastics pipes and fittings — Equipment for fusion jointing polyethylene systems — Part 4:

Traceability coding

ISO 12176-5:— , Plastics pipes and fittings — Equipment for fusion jointing polyethylene systems —

Part 5: Two-dimensional data coding of components and data exchange format for PE piping systems

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

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

assemblies to tensile loading

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

test pieces from a butt-fused joint

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 13957, Plastics pipes and fittings — Polyethylene (PE) tapping tees — Test method for impact resistance

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 16486-5, 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 17778, Plastics piping systems — Fittings, valves and ancillaries — Determination of gaseous flow

rate/pressure drop relationships

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

EN 682, Elastomeric seals — Materials requirements for seals used in pipes and fittings carrying gas and

hydrocarbon fluids
IEC 60529, Degrees of protection provided by enclosures (IP Code)
API 5L, Specification for Line Pipe
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 socket fitting

polyamide (PA-U) fitting which contains one or more integral heating elements that are capable of

transforming electrical energy into heat to realize a fusion joint with a spigot end and/or a pipe

3) Under preparation. Stage at the time of publication: ISO/FDIS 12176-5:2020.
2 © ISO 2020 – All rights reserved
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SIST EN ISO 16486-3:2020
ISO 16486-3:2020(E)
3.2
electrofusion saddle fitting

unplasticized polyamide (PA-U) fitting which contains one or more integral heating elements that are

capable of transforming electrical energy into heat to realize fusion onto a pipe

3.3
tapping tee

electrofusion saddle fitting (3.2) (top loading or wraparound) which contains an integral cutter, used to

cut through the wall of the main pipe, and holds the coupon inside the cutter

Note 1 to entry: The cutter remains in the body of the saddle after installation.

3.4
spigot end fitting

unplasticized polyamide (PA-U) fitting where the outside diameter of the spigot length is equal to the

nominal outside diameter, d , of the corresponding pipe
3.5
transition fitting

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

and a metallic pipe

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 can also act as a grip ring.
3.6
voltage regulation

control of energy supplied, during the fusion process of an electrofusion fitting, by means of the voltage

parameter
3.7
out-of-roundness

difference between the measured maximum outside diameter and the measured

minimum outside diameter in the same cross-sectional plane of a pipe or spigot end of a fitting

3.8
out-of-roundness

difference between the measured maximum inside diameter and the measured minimum

inside diameter in the same cross-sectional plane of a socket
4 Material
4.1 PA-U compound
The fittings shall be made from virgin material.

The compound from which the fittings are made shall be in accordance with ISO 16486-1.

4.2 Material for non-unplasticized polyamide parts
4.2.1 General

The materials and constituent elements used in making the fitting shall be resistant to the external and

internal environments in which they are intended to be used
1) during storage,
2) under the effect of the fluids being conveyed, and
© ISO 2020 – All rights reserved 3
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SIST EN ISO 16486-3:2020
...

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