SIST EN ISO 15876-3:2017

SLOVENSKI STANDARD
SIST EN ISO 15876-3:2017
01-april-2017
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SIST EN ISO 15876-3:2004
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Plastics piping systems for hot and cold water installations - Polybutene (PB) - Part 3:
Fittings (ISO 15876-3:2017)
Kunststoff-Rohrleitungssysteme für die Warm- und Kaltwasserinstallation - Polybuten
(PB) - Teil 3: Formstücke (ISO 15876-3:2017)
Systèmes de canalisations en plastique pour les installations d'eau chaude et froide -
Polybutène (PB) - Partie 3 : Raccords (ISO 15876-3:2017)
Ta slovenski standard je istoveten z: EN ISO 15876-3:2017
ICS:
23.040.45 Fitingi iz polimernih Plastics fittings
materialov
91.140.60 Sistemi za oskrbo z vodo Water supply systems
SIST EN ISO 15876-3:2017 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 15876-3:2017

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SIST EN ISO 15876-3:2017


EN ISO 15876-3
EUROPEAN STANDARD

NORME EUROPÉENNE

February 2017
EUROPÄISCHE NORM
ICS 23.040.45; 91.140.60 Supersedes EN ISO 15876-3:2003
English Version

Plastics piping systems for hot and cold water installations
- Polybutene (PB) - Part 3: Fittings (ISO 15876-3:2017)
Systèmes de canalisations en plastique pour les Kunststoff-Rohrleitungssysteme für die Warm- und
installations d'eau chaude et froide - Polybutène (PB) - Kaltwasserinstallation - Polybuten (PB) - Teil 3:
Partie 3: Raccords (ISO 15876-3:2017) Formstücke (ISO 15876-3:2017)
This European Standard was approved by CEN on 24 December 2016.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15876-3:2017 E
worldwide for CEN national Members.

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SIST EN ISO 15876-3:2017
EN ISO 15876-3:2017 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 15876-3:2017
EN ISO 15876-3:2017 (E)
European foreword
This document (EN ISO 15876-3:2017) 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 August 2017, and conflicting national standards shall
be withdrawn at the latest by August 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN ISO 15876-3:2003.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 15876-3:2017 has been approved by CEN as EN ISO 15876-3:2017 without any
modification.


3

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SIST EN ISO 15876-3:2017

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SIST EN ISO 15876-3:2017
INTERNATIONAL ISO
STANDARD 15876-3
Second edition
2017-01
Plastics piping systems for hot
and cold water installations —
Polybutene (PB) —
Part 3:
Fittings
Systèmes de canalisations en plastique pour les installations d’eau
chaude et froide — Polybutène (PB) —
Partie 3: Raccords
Reference number
ISO 15876-3:2017(E)
©
ISO 2017

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SIST EN ISO 15876-3:2017
ISO 15876-3:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

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SIST EN ISO 15876-3:2017
ISO 15876-3:2017(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions, symbols and abbreviated terms . 2
4 Material characteristics . 3
4.1 Plastics fitting material . 3
4.1.1 PB Fitting material identical to the PB pipe compound . 3
4.1.2 PB fitting material not identical to the PB pipe compound . 4
4.1.3 Plastics fitting material other than PB . 5
4.2 Metallic fitting material . 5
4.3 Influence on water intended for human consumption . 5
5 General characteristics . 5
5.1 Appearance . 5
5.2 Opacity . 5
6 Geometrical characteristics . 5
6.1 General . 5
6.1.1 Nominal diameter(s) . 5
6.1.2 Angles . 5
6.1.3 Threads . 6
6.2 Dimensions of sockets for socket weld and electro-fusion fittings . 6
6.2.1 Dimensions of socket fusion fittings (see Figure 1) . 6
6.2.2 Dimensions of sockets for electrofusion fittings . 8
6.3 Dimensions of metallic fittings . 9
7 Mechanical characteristics of plastics fittings . 9
7.1 General . 9
7.2 Fitting material identical to the PB pipe compound .10
7.3 Fitting made from PB not identical to the PB pipe compound .10
7.4 Fitting made from plastics other than PB .10
8 Melt flow rate .12
9 Sealing elements .12
10 Performance requirements .12
11 Marking .12
11.1 General requirements .12
11.2 Minimum required marking .12
11.3 Additional marking .13
Bibliography .14
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SIST EN ISO 15876-3:2017
ISO 15876-3:2017(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 on 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 the following URL: www . i so .org/ iso/ foreword .html.
ISO 15876-3 was prepared by the European Committee Standardization (CEN) Technical Committee
CEN/TC 155, Plastics pipings systems and ducting systems, in collaboration with ISO Technical Committee
ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 2, Plastics pipes
and fittings for water supplies, in accordance with the Agreement on technical cooperation between ISO
and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 15876-3:2003), which has been
technically revised with the following changes:
— introduction of polybutene random copolymer (PB-R) and renaming existing polybutene (PB) into
polybutene homopolymer (PB-H);
— revision of specifications for conditioning of samples.
A list of all parts in the ISO 15876 series can be found on the ISO website.
iv © ISO 2017 – All rights reserved

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SIST EN ISO 15876-3:2017
ISO 15876-3:2017(E)

Introduction
The System Standard ISO 15876, of which this document is Part 3, specifies the requirements for a
piping system when made from polybutene (PB). The piping system is intended to be used for hot and
cold water installations.
In respect of potential adverse effects on the quality of water intended for human consumption, caused
by the product covered by ISO 15876 (all parts):
— ISO 15876 (all parts) provides no information as to whether the product may be used without
restriction in any of the Member States of the EU or EFTA;
— it should be noted that, while awaiting the adoption of verifiable European criteria, existing national
regulations concerning the use and/or the characteristics of this product remain in force.
Requirements and test methods for materials and components, other than fittings, are specified in
ISO 15876-1 and ISO 15876-2. Characteristics for fitness for purpose (mainly for joints) are covered in
ISO 15876-5. ISO/TS 15876-7 gives guidance for the assessment of conformity.
This document specifies the characteristics of the fittings.
At the date of publication of this standard, System Standards for piping systems of other plastics
materials used for the same application include ISO 15874, ISO 15875, ISO 15876, ISO 15877, ISO 21003
and ISO 22391.
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SIST EN ISO 15876-3:2017

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SIST EN ISO 15876-3:2017
INTERNATIONAL STANDARD ISO 15876-3:2017(E)
Plastics piping systems for hot and cold water
installations — Polybutene (PB) —
Part 3:
Fittings
1 Scope
This document specifies the characteristics of fittings for polybutene-1 (PB-1) piping systems intended
to be used for hot and cold water installations within buildings for the conveyance of water, whether
or not intended for human consumption (domestic systems) and for heating systems under design
pressures and temperatures according to the class of application (see ISO 15876-1).
The designation polybutene is used together with the abbreviation PB throughout this document.
This document covers a range of service conditions (application classes) and design pressure classes. For
values of T , T and T in excess of those in ISO 15876-1:2016, Table 1, this document does not apply.
D max mal
NOTE It is the responsibility of the purchaser or specifier to make the appropriate selections from these
aspects, taking into account their particular requirements and any relevant national regulations and installation
practices or codes.
It also specifies the parameters for the test methods referred to in this document.
In conjunction with the other parts of ISO 15876, this document is applicable to fittings made from
PB and to fittings made from other materials which are intended to be fitted to pipes conforming to
ISO 15876-2 for hot and cold water installations, whereby the joints conform to the requirements of
ISO 15876-5.
This document is applicable to fittings of the following types:
— socket fusion fittings;
— electrofusion fittings;
— mechanical fittings;
— fittings with incorporated inserts.
It is also applicable to fittings made from alternative materials which, when fitted to pipes conforming
to ISO 15876-2, conform to the requirements of ISO 15876-5.
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 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions,
tolerances and designation
ISO 1133-1, Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR)
of thermoplastics — Part 1: Standard method
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SIST EN ISO 15876-3:2017
ISO 15876-3:2017(E)

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 1167-3, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of
the resistance to internal pressure — Part 3: Preparation of components
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 7686, Plastics pipes and fittings — Determination of opacity
ISO 9080, Plastics piping and ducting systems — Determination of the long-term hydrostatic strength of
thermoplastics materials in pipe form by extrapolation
ISO 15876-1:2016, Plastics piping system for hot and cold water installations — Polybutene (PB) —
Part 1: General
ISO 15876-2, Plastics piping system for hot and cold water installations — Polybutene (PB) — Part 2: Pipes
ISO 15876-5, Plastics piping system for hot and cold water installations — Polybutene (PB) — Part 5:
Fitness for purpose of the system
EN 681-1, Elastomeric seals — Materials requirements for pipe joint seals used in water and drainage
applications — Part 1: Vulcanized rubber
EN 681-2, Elastomeric seals — Materials requirements for pipe joint seals used in water and drainage
applications — Part 2: Thermoplastic elastomers
EN 1254-3, Copper and copper alloys — Plumbing fittings — Part 3: Fittings with compression ends for use
with plastics pipes
EN 1254-6, Copper and copper alloys — Plumbing fittings — Part 6: Fittings with push-fit ends
EN 1254-8, Copper and copper alloys — Plumbing fittings — Part 8: Fittings with press ends for use with
plastics and multilayer pipes
EN 10088-1, Stainless steels — Part 1: List of stainless steels
EN 10226-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Taper external
threads and parallel internal treads — Dimensions, tolerances and designation
3 Terms and definitions, symbols and abbreviated terms
For the purposes of this document, the terms and definitions, symbols and abbreviated terms given in
ISO 15876-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1 General
3.1.1
fitting
component of a piping system, which connects two or more pipes and/or fittings together, without any
further function
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SIST EN ISO 15876-3:2017
ISO 15876-3:2017(E)

3.2 Mechanical fittings
3.2.1
compression fitting
fitting in which the joint is made by the compression of a ring or sleeve on the outside wall of the pipe
with or without additional sealing elements and with internal support
3.2.2
crimped fitting
fitting in which the joint is made by crimping of the fitting and/or a ring on the outside wall of the pipe
by means of a special tool
3.2.3
flanged fitting
fitting in which the pipe connection consists of two mating flanges which are mechanically pressed
together and sealed by the compression of an elastomeric sealing element between them
3.2.4
flat seat union fitting
fitting in which the pipe connection consists primarily of two components, at least one of which
normally incorporates a flat sealing surface, which are mechanically pressed together by means of
screwed nut or similar and sealed by the compression of an elastomeric sealing element between them
3.3 Fittings for fusion
3.3.1
socket fusion fitting
fitting in which the joint with the pipe is made by melting together the outer part of the pipe with the
inner part of the fitting by means of heat induced by a heated tool
3.3.2
electrofusion fitting
fitting in which the joint with the pipe is made by melting together the outer part of the pipe and the
inner part of the fitting by means of heat induced by current flowing in an appropriate resistor inserted
in the fitting body
3.4 Fitting with incorporated inserts
3.4.1
fitting with incorporated inserts
fitting in which the joint is made by means of connecting threads or other outlets, inserted in the
plastics body combined with fusion ends for socket fusion or electrofusion
4 Material characteristics
4.1 Plastics fitting material
4.1.1 PB Fitting material identical to the PB pipe compound
The PB compound shall comply with material requirements specified in ISO 15876-1 and ISO 15876-2.
The material shall be tested in form of tubular test pieces.
When tested in accordance with the test methods specified in Table 1, using the indicated parameters,
the test pieces shall withstand the hydrostatic test pressure, p , given in Table 6, Table 7 or Table 8
F
without bursting or leakage.
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SIST EN ISO 15876-3:2017
ISO 15876-3:2017(E)

Table 1 — Mechanical characteristic of tubular test pieces made of PB by injection moulding
Characteristic Requirement Test parameters for the individual tests Test method
Resistance to No bursting or Hydrostatic Test Test Number of ISO 1167-1
internal leakage during (hoop) stress temperature period test pieces and
pressure the test period ISO 1167-3
MPa °C h
a
15,5 20 1 3
PB-H 15,2 20 22 3
6,0 95 1 000 3
a
15,3 20 1 3
PB-R 15,0 20 22 3
4,9 95 1 000 3
Test parameters for all tests
b
Sampling procedure
Type of end cap Type a)
Orientation of test piece Not specified
Type of test Water-in-water
a
In case of dispute, tests shall be done at 20 °C/22 h.
b [1]
The sampling procedure is not specified. For guidance, see ISO/TS 15876-7 .
4.1.2 PB fitting material not identical to the PB pipe compound
4.1.2.1 Evaluation of σ -values and control points
LPL
The fitting material in form of injection moulded or extruded tubular test pieces shall be evaluated by
using the method given in ISO 9080 or equivalent where internal pressure tests are made in accordance
with ISO 1167-1 and ISO 1167-3 to find the σ -values. The σ -values thus determined shall be used to
LPL LPL
determine the design stress, σ , (see ISO 15876-2) and values of hydrostatic stress, σ , corresponding
DF F
to the temperature and time control points given in Table 2.
NOTE One equivalent way of evaluation is to calculate the σ -value for each temperature (for example,
LPL
20 °C, 70 °C and 95 °C) individually.
If evaluation using the method given in ISO 9080 or equivalent is available from long-term internal
pressure tests relative to extruded pipes of the same compound as used for the fitting, the relevant test
temperature shall be equal to or higher than the maximum design temperature, T , for the service
max
condition class.
Table 2 — Control points for testing fitting materials with tubular test pieces relative to
classification of service conditions
All Application
application
Class 1 Class 2 Class 4 Class 5
classes
Maximum design temperature, T , in °C — 80 80 70 90
max
a a
Test temperature, T , in °C 20 95 95 80 95
test
Test duration, in h 1 1 000 1 000 1 000 1 000
a
Conducted at 95 °C to match existing test facilities.
It is recommended that the nominal diameter of the tubular test pieces should be in the range of the
nominal diameters of fittings normally produced by the manufacturer.
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SIST EN ISO 15876-3:2017
ISO 15876-3:2017(E)

4.1.2.2 Thermal stability
When testing the thermal stability by hydrostatic pressure testing in accordance with ISO 1167-1 at
110 °C for 8 760 h, using a test piece in pipe form or a fitting connected to pipes, the test piece shall
withstand the test without bursting. The test shall be conducted in water-in-air at an internal pressure
equivalent to the hydrostatic stress used in the pipe material thermal stability test.
If a fitting connected to pipes is used as a test piece and the pipe connection fails, then the thermal
stability test shall be repeated using a test piece in pipe form.
4.1.3 Plastics fitting material other than PB
Plastics material, other than PB, for fittings intended to be used in PB piping systems for hot and cold
water within buildings for the conveyance of water, whether or not for human consumption (domestic
systems) and for heating systems, shall conform to 4.3.
4.2 Metallic fitting material
Metallic material for fittings intended to be used with components conforming to ISO 15876 shall
conform to the requirements given in EN 1254-3, EN 1254-6, EN 1254-8 or EN 10088-1, as applicable.
4.3 Influence on water intended for human consumption
The material shall conform to ISO 15876-1.
5 General characteristics
5.1 Appearance
When viewed without magnification, the internal and external surfaces of fittings shall be smooth, clean
and free from scoring, cavities and other surface defects to an extent that would prevent conformity to
this document. The material shall not contain visible impurities. Slight variations in appearance of the
colour shall be permitted. Each end of a fitting shall be square to its axis.
5.2 Opacity
Fittings that are declared to be opaque shall not transmit more than 0,2 % of visible light when tested
in accordance with
...