SIST EN ISO 9969:2016

Thermoplastics pipes - Determination of ring stiffness (ISO 9969:2016)

ISO 9969:2016 specifies a test method for determining the ring stiffness of thermoplastics pipes having a circular cross section.

Thermoplastische Rohre - Bestimmung der Ringsteifigkeit (ISO 9969:2016)

Diese Internationale Norm legt ein Prüfverfahren zur Bestimmung der Ringsteifigkeit von thermoplastischen Rohren mit rundem Querschnitt fest.

Tubes en matières thermoplastiques - Détermination de la rigidité annulaire (ISO 9969:2016)

ISO 9969:2016 spécifie une méthode de détermination de la rigidité annulaire de tubes en matières thermoplastiques ayant une section circulaire.

Plastomerne cevi - Ugotavljanje obodne togosti (ISO 9969:2016)

Ta mednarodni standard opredeljuje preskusno metodo za ugotavljanje obodne togosti plastomernih
cevi s krožnim prečnim prerezom.

General Information

• Status: Published
• Public Enquiry End Date: 29-Jul-2013
• Publication Date: 13-Mar-2016
• ICS: 23.040.20 - Plastics pipes
• Technical Committee: PCV - Plastic pipes, fittings and valves
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 05-Feb-2016
• Due Date: 11-Apr-2016
• Completion Date: 14-Mar-2016
• Directive: 89/106/EEC - Construction products
• Directive: 93/38/EEC - Procurement procedures of entities operating in the water, energy, transport and telecommunications sectors
• Mandate: M/BC/CEN/88/15 - Standardization request to CEN/CENELEC in the field of Water supply, drainage and sewerage
• Ref Project: EN ISO 9969:2016 - Thermoplastics pipes - Determination of ring stiffness (ISO 9969:2016)

Relations

• Replaces: SIST EN ISO 9969:2008 - Thermoplastics pipes - Determination of ring stiffness (ISO 9969:2007)
• Effective Date: 01-Apr-2016

Overview

EN ISO 9969:2016 - Thermoplastics pipes: Determination of ring stiffness (ISO 9969:2016) specifies a laboratory test method for determining the ring stiffness of circular-section thermoplastic pipes. Adopted by CEN as a European Standard, this third edition supersedes EN ISO 9969:2007 and defines the apparatus, test pieces, conditioning, test procedure and calculation required to report ring stiffness values for quality control, type testing and specification compliance.

Key topics and technical requirements

• Scope and principle: Ring stiffness is determined by compressing a pipe sample between two parallel plates at a constant deflection speed and recording force vs. deflection. The stiffness is calculated from the force required to produce a 3 % diametric deflection.
• Apparatus: A compressive testing machine with parallel rigid plates, capable of controlled crosshead speed and sufficient force/travel. Force measuring accuracy: ±2 %.
• Deflection speeds (selected values from the standard):
  • di ≤ 100 mm: 2 ± 0.1 mm/min
  • 100 < di ≤ 200 mm: 5 ± 0.25 mm/min
  • 200 < di ≤ 400 mm: 10 ± 0.5 mm/min
  • 400 < di ≤ 710 mm: 20 ± 1 mm/min
  • di > 710 mm: 0.03 × di ± 5 %
• Test pieces: Three samples (a, b, c) cut from a marked pipe; lengths typically 300 ± 10 mm for pipes ≤ 1500 mm nominal diameter (special rules for structured or very large pipes). Inside diameter measured per ISO 3126; measurement accuracies: length ±1 mm, inside diameter ±0.5 %, deflection change 0.1 mm or 1 % of deflection.
• Conditioning and temperature: Samples conditioned at test temperature for at least 24 h. Default laboratory temperature: (23 ± 2) °C (27 °C allowed regionally). For type testing or disputes, sample age should be (21 ± 2) days.
• Test report: Requires recorded dimensions, test conditions, force–deflection data and calculated ring stiffness (kN/m).

Applications and users

• Manufacturers of thermoplastic pipes and fittings for hydraulic, drainage and buried applications use EN ISO 9969:2016 for product development, quality control and specification certification.
• Independent testing laboratories and conformity assessment bodies apply the method for type approval and compliance testing.
• Engineers, specifiers and procurement teams reference ring stiffness values when selecting pipes for load-bearing conditions (e.g., buried pipelines, traffic loading).
• Standards committees and regulatory authorities rely on the method to harmonize mechanical property requirements.

Related standards

• ISO 3126 - referenced for dimensional measurements (inside diameter, circumference).
• EN adoption status: EN ISO 9969:2016 (supersedes EN ISO 9969:2007); ICS code 23.040.20 (Plastics pipes).

Keywords: EN ISO 9969:2016, ring stiffness, thermoplastics pipes, pipe testing, ISO 9969, test method, pipe stiffness.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2016
1DGRPHãþD
SIST EN ISO 9969:2008
Plastomerne cevi - Ugotavljanje obodne togosti (ISO 9969:2016)
Thermoplastics pipes - Determination of ring stiffness (ISO 9969:2016)
Thermoplastische Rohre - Bestimmung der Ringsteifigkeit (ISO 9969:2016)
Tubes en matières thermoplastiques - Détermination de la rigidité annulaire (ISO
9969:2016)
Ta slovenski standard je istoveten z: EN ISO 9969:2016
ICS:
23.040.20 Cevi iz polimernih materialov Plastics pipes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 9969
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2016
EUROPÄISCHE NORM
ICS 23.040.20 Supersedes EN ISO 9969:2007
English Version
Thermoplastics pipes - Determination of ring stiffness (ISO
9969:2016)
Tubes en matières thermoplastiques - Détermination Thermoplastische Rohre - Bestimmung der
de la rigidité annulaire (ISO 9969:2016) Ringsteifigkeit (ISO 9969:2016)
This European Standard was approved by CEN on 7 November 2015.

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, 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
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9969:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 9969:2016) 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 July 2016, and conflicting national standards shall be
withdrawn at the latest by July 2016.
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 9969:2007.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 9969:2016 has been approved by CEN as EN ISO 9969:2016 without any modification.
INTERNATIONAL ISO
STANDARD 9969
Third edition
2016-01-15
Thermoplastics pipes —
Determination of ring stiffness
Tubes en matières thermoplastiques — Détermination de la
rigidité annulaire
Reference number
ISO 9969:2016(E)
©
ISO 2016
ISO 9969:2016(E)
© ISO 2016, 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.
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ii © ISO 2016 – All rights reserved

ISO 9969:2016(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Symbols . 1
4 Principle . 1
5 Apparatus . 2
6 Test pieces . 3
6.1 Marking and number of test pieces . 3
6.2 Length of test pieces . 3
6.3 Inside diameter of test piece(s) . 4
6.4 Age of test pieces . 4
7 Conditioning . 5
8 Procedure. 5
9 Calculation of ring stiffness . 7
10 Test report . 8
ISO 9969:2016(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 WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 138, Plastics pipes, fittings and valves for the
transport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials
and their accessories — Test methods and basic specifications.
This third edition cancels and replaces the second edition (ISO 9969:2007), which has been
technically revised.
iv © ISO 2016 – All rights reserved

INTERNATIONAL STANDARD ISO 9969:2016(E)
Thermoplastics pipes — Determination of ring stiffness
1 Scope
This International Standard specifies a test method for determining the ring stiffness of thermoplastics
pipes having a circular cross section.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions
3 Symbols
For the purposes of this document, the following symbols apply.
Units
d nominal diameter of pipe mm
n
d inside diameter of the
...