oSIST prEN ISO 13760:2026

SLOVENSKI STANDARD
01-marec-2026
Polimerne cevi za transport tekočin pod tlakom - Minerjevo pravilo (M. A. Miner) -
Računska metoda za kumulativen učinek poškodb (ISO/DIS 13760:2026)
Plastics pipes for the conveyance of fluids under pressure - Miner's rule - Calculation
method for cumulative damage (ISO/DIS 13760:2026)
Kunststoffrohre für den Transport von Fluiden unter Druck - Minersche Regel -
Berechnungsverfahren für kumulative Schädigungen (ISO/DIS 13760:2026)
Tubes en matières plastiques pour le transport des fluides sous pression - Règle de
Miner - Méthode de calcul du cumul des dommages (ISO/DIS 13760:2026)
Ta slovenski standard je istoveten z: prEN ISO 13760
ICS:
23.040.20 Cevi iz polimernih materialov Plastics pipes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 13760
ISO/TC 138/SC 5
Plastics pipes for the conveyance
Secretariat: NEN
of fluids under pressure — Miner's
Voting begins on:
rule — Calculation method for
2026-01-13
cumulative damage
Voting terminates on:
2026-04-07
Tubes en matières plastiques pour le transport des fluides sous
pression — Règle de Miner — Méthode de calcul du cumul des
dommages
ICS: 23.040.20
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
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NATIONAL REGULATIONS.
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NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 13760:2026(en)
DRAFT
ISO/DIS 13760:2026(en)
International
Standard
ISO/DIS 13760
ISO/TC 138/SC 5
Plastics pipes for the conveyance
Secretariat: NEN
of fluids under pressure — Miner's
Voting begins on:
rule — Calculation method for
cumulative damage
Voting terminates on:
Tubes en matières plastiques pour le transport des fluides sous
pression — Règle de Miner — Méthode de calcul du cumul des
dommages
ICS: 23.040.20
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
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or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
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TO SUBMIT, WITH THEIR COMMENTS,
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NOTIFICATION OF ANY RELEVANT PATENT
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 13760:2026(en)
ii
ISO/DIS 13760:2026(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms. 1
5 Principle . 2
6 General procedure . 2
Annex A (informative) Examples of the use of Miner´s rule. 3
Annex B (informative) Miner's rule and oxidative stability . 7
Bibliography . 9

iii
ISO/DIS 13760:2026(en)
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,
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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 document 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).
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)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
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Any trade name used in this document is information given for the convenience of users and does not
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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 5, (General properties of pipes, fittings and valves of plastic materials and
their accessories — Test methods and basic specifications).
This second edition cancels and replaces the first edition (ISO 13760: 1998), which has been technical
revised. The main changes compared tom the previous edition are as follows:
— The scope of the document has been re-phrased for as more detailed description of Miner´s rule with
respect to designing plastics piping systems.
— The application examples given in Annexes A and B have been reformulated to exact procedures and
extended.
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.

iv
ISO/DIS 13760:2026(en)
Introduction
In plastics piping systems, operating conditions like temperature and pressure can vary over the whole
service time.
One example is in hot & cold-water application, in particular, this variation is mainly in temperature. (E.g.
a hot water pipe is not necessary all the service time at constant high temperature but usually at the same
pressure). Typical time temperature profiles are defined in ISO 10508 as application classes and these
profiles are used for designing the dimensions of the piping components.
Miner´s rule, which allows the assessment of a load collective on the cumulative damage, was found to be
suitable also for dimensioning plastics piping components under varying conditions to achieve a targeted
design time. Additionally, the effect of cumulative damage caused by oxidative attack e.g. for polyolefins, at
varying operating conditions on the design life can be evaluated with Miner´s rule.

v
DRAFT International Standard ISO/DIS 13760:2026(en)
Plastics pipes for the conveyance of fluids under pressure —
Miner's rule — Calculation method for cumulative damage
1 Scope
In general terms, Miner’s rule is a common approach to calculate how the accumulation of a specific load
that varies over time effects the time until failure.
This international standard specifies the application of Miner’s rule for calculating the design time until
failure of plastics pipes and piping systems of plastics materials under varying, but known, load conditions.
Miner’s rule can also be applied reciprocally to calculate the tolerable load levels along a desired design time.
This international standard specifies particularly the application of Miner’s rule to calculate stress or pressure
regimes, respectively, that are tolerable during a targeted design time for plastics or composite pipes.
Further, the application of Miner’s rule on the effect of accumulated damage on polyolefins caused by
oxidative attack under varying temperatures and times on the design life is specified.
It is necessary to apply Miner's rule to each failure mechanism separately. Thus, for mechanical failure due
to internal pressure, other failure mechanisms, such as oxidative or dehydrochlorinative degradative failure
mechanisms, are to be neglected (assuming, of course, no interaction). A material may be used only when it
is proven to conform to all failure mechanism criteria.
NOTE Miner's rule is an empirically based procedure and is only a first approximation to real
...