EN ISO 10928:2025
(Main)Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes and fittings - Methods for regression analysis and their use (ISO 10928:2024)
Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes and fittings - Methods for regression analysis and their use (ISO 10928:2024)
This document specifies procedures suitable for the analysis of data which, when converted into logarithms of the values, have either a normal or a skewed distribution. It is intended for use with test methods and referring standards for glass-reinforced thermosetting plastics (GRP) pipes or fittings for the analysis of properties as a function of time. However, it can also be used for the analysis of other data.
Two methods are specified, which are used depending on the nature of the data. Extrapolation using these techniques typically extends a trend from data gathered over a period of approximately 10 000 h to a prediction of the property at 50 years, which is the typical maximum extrapolation time.
This document only addresses the analysis of data. The test procedures for collecting the data, the number of samples required and the time period over which data are collected are covered by the referring standards and/or test methods. Clause 6 discusses how the data analysis methods are applied to product testing and design.
Kunststoff-Rohrleitungssysteme - Rohre und Formstücke aus glasfaserverstärkten Kunststoffen (GFK) - Verfahren zur Regressionsanalyse und deren Anwendung (ISO 10928:2024)
Dieses Dokument legt Verfahren fest, die für die Analyse von Daten geeignet sind, die nach Umwandlung in Logarithmen der Werte entweder eine Normalverteilung oder eine schiefe Verteilung haben. Es ist für die Anwendung im Zusammenhang mit Prüfverfahren und verweisenden Normen für Rohre und Formstücke aus glasfaserverstärkten duroplastischen Kunststoffen (GFK) vorgesehen, um deren Eigenschaften in Abhängigkeit von der Zeit zu analysieren. Es kann jedoch auch für die Analyse anderer Daten angewendet werden.
Die beiden festgelegten Verfahren werden in Abhängigkeit von der Art der Daten verwendet. Die Extrapolation, die diese Verfahren einsetzt, führt üblicherweise dazu, dass aus Daten, die über eine Zeitspanne von etwa 10 000 h erfasst wurden, eine Vorhersage der Eigenschaft nach 50 Jahren abgeleitet werden kann, was der typischen maximalen Extrapolationszeit entspricht.
Dieses Dokument behandelt nur die Analyse von Daten. Die Prüfverfahren für die Erhebung von Daten, die Anzahl der erforderlichen Proben und die Dauer, während der Daten erhoben werden, sind in den verweisenden Normen und/oder Prüfverfahren angegeben. In Abschnitt 6 wird erläutert, wie die Datenanalyseverfahren auf die Prüfung und Ausführung von Produkten angewendet werden.
Systèmes de canalisations en matières plastiques - Tubes et raccords plastiques thermodurcissables renforcés de verre (PRV) - Méthodes pour une analyse de régression et leurs utilisations (ISO 10928:2024)
Le présent document spécifie des procédures adaptées à l'analyse de données qui, une fois converties en logarithmes des valeurs, présentent une distribution normale ou asymétrique. Il est destiné à être utilisé avec les méthodes d'essai et les normes de référence pour les tubes ou raccords en plastique thermodurcissable renforcé de verre (PRV) pour l'analyse des propriétés en fonction du temps. Cependant, elle peut également être utilisée pour l'analyse d'autres données.
Deux méthodes sont spécifiées, qui sont utilisées en fonction de la nature des données. L'extrapolation à l'aide de ces techniques permet généralement d'étendre une tendance à partir de données recueillies sur une période d'environ 10 000 heures à une prédiction de la propriété à 50 ans, ce qui est le temps d'extrapolation maximal habituel.
Le présent document ne traite que de l'analyse des données. Les procédures d'essai pour la collecte des données, le nombre d'échantillons requis et la période de collecte des données sont couverts par les normes et/ou les méthodes d'essai correspondantes. L'Article 6 traite de l'application des méthodes d'analyse des données aux essais et à la conception des produits.
Cevni sistemi iz polimernih materialov - Cevi in fitingi iz duromernih materialov, ojačenih s steklenimi vlakni (GRP) - Metode za regresijsko analizo in njihova uporaba (ISO 10928:2024)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2025
Cevni sistemi iz polimernih materialov - Cevi in fitingi iz duromernih materialov,
ojačenih s steklenimi vlakni (GRP) - Metode za regresijsko analizo in njihova
uporaba (ISO 10928:2024)
Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes and fittings
- Methods for regression analysis and their use (ISO 10928:2024)
Kunststoff-Rohrleitungssysteme - Rohre und Formstücke aus glasfaserverstärkten
Kunststoffen (GFK) - Verfahren zur Regressionsanalyse und deren Anwendung (ISO
10928:2024)
Systèmes de canalisations en matières plastiques - Tubes et raccords plastiques
thermodurcissables renforcés de verre (PRV) - Méthodes pour une analyse de
régression et leurs utilisations (ISO 10928:2024)
Ta slovenski standard je istoveten z: EN ISO 10928:2025
ICS:
23.040.20 Cevi iz polimernih materialov Plastics pipes
23.040.45 Fitingi iz polimernih Plastics fittings
materialov
83.120 Ojačani polimeri Reinforced plastics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 10928
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 23.040.20; 23.040.45 Supersedes EN 705:1994, EN 705:1994/AC:1995
English Version
Plastics piping systems - Glass-reinforced thermosetting
plastics (GRP) pipes and fittings - Methods for regression
analysis and their use (ISO 10928:2024)
Systèmes de canalisations en matières plastiques - Kunststoff-Rohrleitungssysteme - Rohre und
Tubes et raccords plastiques thermodurcissables Formstücke aus glasfaserverstärkten Kunststoffen
renforcés de verre (PRV) - Méthodes pour une analyse (GFK) - Verfahren zur Regressionsanalyse und deren
de régression et leurs utilisations (ISO 10928:2024) Anwendung (ISO 10928:2024)
This European Standard was approved by CEN on 24 February 2025.
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, Türkiye 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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10928:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO 10928:2024 has been prepared by Technical Committee ISO/TC 138 "Plastics pipes,
fittings and valves for the transport of fluids” of the International Organization for Standardization
(ISO) and has been taken over as EN ISO 10928:2025 by 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 2025, and conflicting national standards shall
be withdrawn at the latest by August 2025.
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.
This document supersedes EN 705:1994, EN 705:1994/AC:1995.
Any feedback and questions on this document should be directed to the users’ national standards body.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 10928:2024 has been approved by CEN as EN ISO 10928:2025 without any modification.
International
Standard
ISO 10928
Fourth edition
Plastics piping systems — Glass-
2024-03
reinforced thermosetting plastics
(GRP) pipes and fittings — Methods
for regression analysis and their use
Systèmes de canalisations en matières plastiques — Tubes et
raccords plastiques thermodurcissables renforcés de verre (PRV)
— Méthodes pour une analyse de régression et leurs utilisations
Reference number
ISO 10928:2024(en) © ISO 2024
ISO 10928:2024(en)
© ISO 2024
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
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 10928:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Procedures for determining the linear relationships — Methods A and B . 1
5.1 Procedures common to methods A and B .1
5.2 Method A — Covariance method.2
5.2.1 General .2
5.2.2 Suitability of data . .3
5.2.3 Functional relationships . .3
5.2.4 Calculation of variances .4
5.2.5 Check for the suitability of data for extrapolation .4
5.2.6 Validation of statistical procedures by an example calculation .5
5.3 Method B — Regression with time as the independent variable .8
5.3.1 General .8
5.3.2 Suitability of data . .9
5.3.3 Functional relationships . . .9
5.3.4 Check for the suitability of data for extrapolation .9
5.3.5 Validation of statistical procedures by an example calculation .9
6 Application of methods to product design and testing .11
6.1 General .11
6.2 Product design .11
6.3 Comparison to a specified value .11
6.4 Declaration of a long-term value .11
Annex A (informative) Second-order polynomial relationships .12
Annex B (normative) Calculation of lower confidence and prediction limits for method A .16
Bibliography . 19
iii
ISO 10928:2024(en)
Foreword
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bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
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ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
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This document was prepared by Technical Committee ISO/TC 138, Plast
...
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