Plastics piping systems for hot and cold water installations - Polybutene (PB) - Part 3: Fittings - Amendment 2 (ISO 15876-3:2017/Amd 2:2021)

Kunststoff-Rohrleitungssysteme für die Warm- und Kaltwasserinstallation - Polybuten (PB) - Teil 3: Formstücke - Änderung 2 (ISO 15876-3:2017/Amd 2:2021)

No scope available

Systèmes de canalisations en plastique pour les installations d'eau chaude et froide - Polybutène (PB) - Partie 3: Raccords - Amendement 2 (ISO 15876-3:2017/Amd 2:2021)

Cevni sistemi iz polimernih materialov za napeljave z vročo in hladno vodo - Polibuten (PB) - 3. del: Fitingi - Dopolnilo A2 (ISO 15876-3:2017/Amd 2:2021)

General Information

Status
Published
Publication Date
26-Oct-2021
Withdrawal Date
29-Apr-2022
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
27-Oct-2021
Due Date
28-Jun-2022
Completion Date
27-Oct-2021

Relations

Overview

EN ISO 15876-3:2017/A2:2021 is Amendment 2 to Part 3 of the ISO 15876 series covering polybutene (PB) fittings for plastics piping systems used in hot and cold water installations. Endorsed by CEN in October 2021, this amendment updates definitions, test requirements and material/inspection provisions for both plastic and metallic fittings used with PB pipe systems.

Key topics and technical requirements

  • Updated terms and definitions - clarified joint types: compression fitting, radial press fitting, and new definitions for axial press fitting and push‑fit fitting (including notes on internal supports and sealing elements).
  • Metallic materials - metallic fittings for use with ISO 15876 components are limited to copper alloys or stainless steel alloys, to be defined by relevant standards or regulations.
  • Appearance and dimensional checks:
    • Plastic fittings: smooth, clean surfaces, perpendicular ends; dimensions measured per ISO 3126.
    • Metal fittings: clean, burr‑free surfaces; dimensions measured per ISO 2768‑1 and/or ISO 22081.
  • Minimum wall thickness - Annex A provides dimensional requirements for copper‑alloy fittings (minimum thickness at specified points), with measurement guidance.
  • Material and performance testing:
    • MFR/MVR (melt flow/mass‑volume flow) of PB compounds and molded fittings per ISO 1133‑1; for PB the MFR/MVR difference shall not exceed 30% under specified conditions.
    • Stress corrosion resistance for copper‑alloy fittings; CuZn alloys are acceptable when hardness meets thresholds (HBW ≤110 or HV ≤134 as specified).
    • Dezincification resistance (where declared) tested to ISO 6509‑1 with acceptance criteria: maximum depth ≤200 µm; average ≤100 µm.
  • Tightness test for cast alloys - new Clause 12 requires leak testing of cast fittings after machining using compressed air at ≥ 0.5 MPa (5 bar) while immersed in water (air bubbles indicate leakage).

Applications and who uses it

This amendment is relevant for:

  • Fittings manufacturers (design, production, QC)
  • Plumbing system designers and specifiers using PB piping
  • Test laboratories and conformity assessment bodies
  • Installers and trade professionals selecting compatible fittings (compression, press, push‑fit)
  • Regulators and standards bodies implementing national adoption (CEN members required to adopt by April 2022)

Related standards (examples)

  • ISO 15876 series (PB piping)
  • ISO 1133‑1 (MFR/MVR testing)
  • ISO 3126 (plastics dimensions)
  • ISO 2768‑1 / ISO 22081 (metallic dimension/tolerancing)
  • ISO 6509‑1, ISO 6506‑1, ISO 6957 (metal corrosion/dezincification and hardness tests)

This amendment improves clarity on joint types, materials, testing and dimensional controls - critical for ensuring safe, durable PB hot-and-cold water installations.

Amendment
EN ISO 15876-3:2017/A2:2021
English language
14 pages
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Standards Content (Sample)


SLOVENSKI STANDARD
01-december-2021
Cevni sistemi iz polimernih materialov za napeljave z vročo in hladno vodo -
Polibuten (PB) - 3. del: Fitingi - Dopolnilo A2 (ISO 15876-3:2017/Amd 2:2021)
Plastics piping systems for hot and cold water installations - Polybutene (PB) - Part 3:
Fittings - Amendment 2 (ISO 15876-3:2017/Amd 2:2021)
Kunststoff-Rohrleitungssysteme für die Warm- und Kaltwasserinstallation - Polybuten
(PB) - Teil 3: Formstücke - Änderung 2 (ISO 15876-3:2017/Amd 2:2021)
Systèmes de canalisations en plastique pour les installations d'eau chaude et froide -
Polybutène (PB) - Partie 3: Raccords - Amendement 2 (ISO 15876-3:2017/Amd 2:2021)
Ta slovenski standard je istoveten z: EN ISO 15876-3:2017/A2:2021
ICS:
23.040.45 Fitingi iz polimernih Plastics fittings
materialov
91.140.60 Sistemi za oskrbo z vodo Water supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 15876-3:2017/A2
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2021
EUROPÄISCHE NORM
ICS 23.040.45; 91.140.60
English Version
Plastics piping systems for hot and cold water installations
- Polybutene (PB) - Part 3: Fittings - Amendment 2 (ISO
15876-3:2017/Amd 2:2021)
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 - Amendement 2 (ISO 15876- Formstücke - Änderung 2 (ISO 15876-3:2017/Amd
3:2017/Amd 2:2021) 2:2021)
This amendment A2 modifies the European Standard EN ISO 15876-3:2017; it was approved by CEN on 1 October 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant 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 amendment 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 15876-3:2017/A2:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 15876-3:2017/A2:2021) 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 April 2022, and conflicting national standards shall be
withdrawn at the latest by April 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 15876-3:2017/Amd 2:2021 has been approved by CEN as EN ISO 15876-
3:2017/A2:2021 without any modification.

INTERNATIONAL ISO
STANDARD 15876-3
Second edition
2017-01
AMENDMENT 2
2021-10
Plastics piping systems for hot and
cold water installations — Polybutene
(PB) —
Part 3:
Fittings
AMENDMENT 2
Systèmes de canalisations en plastique pour les installations d'eau
chaude et froide — Polybutène (PB) —
Partie 3: Raccords
AMENDEMENT 2
Reference number
ISO 15876-3:2017/Amd.2:2021(E)
ISO 15876-3:2017/Amd.2:2021(E)
© 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 15876-3:2017/Amd.2:2021(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 2, Plastics pipes and fittings for water supplies, 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).
A list of all parts in the ISO 15876 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.
iii
ISO 15876-3:2017/Amd.2:2021(E)
Plastics piping systems for hot and cold water
installations — Polybutene (PB) —
Part 3:
Fittings
AMENDMENT 2
Normative references
Add the following normative references:
ISO 2768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual
tolerance indications
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6509-1, Corrosion of metals and alloys — Determination of dezincification resistance of copper alloys
with zinc — Part 1: Test method
ISO 6957, Copper alloys — Ammonia test for stress corrosion resistance
ISO 22081, Geometrical product specifications (GPS) — Geometrical tolerancing — General geometrical
specifications and general size specifications

Delete the following normative references:
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
Terms and definitions
Replace the existing definition 3.2.1 with the following:

3.2.1
compression fitting
fitting with internal support in which the joint is made by screwing a union nut along a thread to
compress a ring on the outside wall of the pipe and finally to cause a clamping of the pipe between the
ring and the inner support of the fitting
Note 1 to entry: The fitting may be with or without sealing element.

ISO 15876-3:2017/Amd.2:2021(E)
Replace the existing definition 3.2.2 with the following;
3.2.2
radial press fitting
fitting with internal support in which the joint is made by a radial compression of a ring
...

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Frequently Asked Questions

EN ISO 15876-3:2017/A2:2021 is a amendment published by the European Committee for Standardization (CEN). Its full title is "Plastics piping systems for hot and cold water installations - Polybutene (PB) - Part 3: Fittings - Amendment 2 (ISO 15876-3:2017/Amd 2:2021)". This standard covers: No scope available

No scope available

EN ISO 15876-3:2017/A2:2021 is classified under the following ICS (International Classification for Standards) categories: 23.040.45 - Plastics fittings; 91.140.60 - Water supply systems. The ICS classification helps identify the subject area and facilitates finding related standards.

EN ISO 15876-3:2017/A2:2021 has the following relationships with other standards: It is inter standard links to EN ISO 15876-3:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

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