ISO 13954:2025
(Main)Plastics pipes and fittings — Peel decohesion test for polyethylene (PE) electrofusion assemblies of nominal outside diameter greater than or equal to 90 mm
Plastics pipes and fittings — Peel decohesion test for polyethylene (PE) electrofusion assemblies of nominal outside diameter greater than or equal to 90 mm
This document specifies a test method to assess ductility of the fusion joint interface of polyethylene electrofusion socket assemblies for use in pipe systems for the distribution of fluids. This method is applicable to assemblies, with nominal outside diameters greater than or equal to 90 mm.
Tubes et raccords en matières plastiques — Essai de décohésion par pelage des assemblages électrosoudables en polyéthylène (PE) de diamètres extérieurs nominaux supérieurs ou égaux à 90 mm
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Standards Content (Sample)
International
Standard
ISO 13954
Second edition
Plastics pipes and fittings — Peel
2025-11
decohesion test for polyethylene
(PE) electrofusion assemblies of
nominal outside diameter greater
than or equal to 90 mm
Tubes et raccords en matières plastiques — Essai de décohésion
par pelage des assemblages électrosoudables en polyéthylène (PE)
de diamètres extérieurs nominaux supérieurs ou égaux à 90 mm
Reference number
© ISO 2025
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ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Principle . 2
6 Apparatus . 2
6.1 Tensile-testing machine .2
6.2 Shackle-type link .4
7 Test pieces . 4
7.1 Preparation of assembly .4
7.2 Preparation of test pieces .4
7.3 Number of test assemblies .5
8 Conditioning . 5
9 Procedure . 6
10 Interpretation of results . 8
11 Test report . 9
Annex A (informative) Recommended criterion for evaluation .10
Bibliography .11
iii
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
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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 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).
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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 13954:1997), which has been technically
revised. It also incorporates the Amendment ISO 13954:1997/Amd. 1:2020.
The main changes are as follows:
— symbols have been aligned with relevant ISO documents, e.g. References [1], [2], [3] and [4];
— allowance for thickness reduction has been introduced for larger diameter fittings;
— guidance on assessment of air pockets in the fusion zone has been given in Clause 9 g) and Table 1;
— photos for fracture surface assessment have been introduced;
— the terms and definitions clause (Clause 3) has been added, and subsequent clauses have been renumbered.
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
International Standard ISO 13954:2025(en)
Plastics pipes and fittings — Peel decohesion test for
polyethylene (PE) electrofusion assemblies of nominal
outside diameter greater than or equal to 90 mm
1 Scope
This document specifies a test method to assess ductility of the fusion joint interface of polyethylene
electrofusion socket assemblies for use in pipe systems for the distribution of fluids. This method is
applicable to assemblies, with nominal outside diameters greater than or equal to 90 mm.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
failure
any break of the test piece which is visible to the naked eye
3.2
brittle failure
failure (3.1), showing no plastic deformation in the fusion plane after separation
Note 1 to entry: Brittle failure is characterized by smooth failure surface(s) without any fibrils.
Note 2 to entry: Brittle failure occurs instantaneously at relatively low stresses and strains (low failure energy).
3.3
ductile failure
failure (3.1), showing plastic deformation prior to separation
Note 1 to entry: Ductile failures are characterized by the presence of gross yielding.
Note 2 to entry: Micro-ductile failure often occurs with stress-whitening which may require further investigation
using an optical microscope.
4 Symbols
b gap, sized to accommodate tensioning chain/rope
b width of the test sample
b adjustable width to fit with the size of the test piece
l maximum brittle-failure length observed
L free length of the test piece as the pipe segment between the clamps and which p
...
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