SIST EN 12814-7:2024

SLOVENSKI STANDARD
01-junij-2024
Preskus zvarjenih spojev plastomernih polizdelkov - 7. del: Trgalni preskus z
zožanimi preskušanci
Testing of welded joints of thermoplastics semi-finished products - Part 7: Tensile test
with waisted test specimens
Prüfen von Schweißverbindungen aus thermoplastischen Kunststoffen - Teil 7:
Zugversuch an Probekörpern mit Rundkerbe
Essais des assemblages soudés sur produits semi-finis en thermoplastiques - Partie 7:
Essai de traction avec éprouvettes entaillées en U
Ta slovenski standard je istoveten z: EN 12814-7:2024
ICS:
25.160.40 Varjeni spoji in vari Welded joints and welds
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 12814-7
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2024
EUROPÄISCHE NORM
ICS 25.160.40 Supersedes EN 12814-7:2002
English Version
Testing of welded joints of thermoplastics semi-finished
products - Part 7: Tensile test with waisted test specimens
Essais des assemblages soudés sur produits semi-finis Prüfen von Schweißverbindungen an Halbzeugen aus
en thermoplastiques - Partie 7 : Essai de traction avec thermoplastischen Kunststoffen - Teil 7: Zugversuch an
éprouvettes entaillées en U Probekörpern mit Rundkerbe
This European Standard was approved by CEN on 15 January 2024.

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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12814-7:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references. 4
3 Terms and definitions . 4
4 Symbols and designations . 5
5 Principle of the test . 5
6 Sampling procedures. 5
7 Dimensions of test specimens . 5
8 Cutting of test specimens . 6
9 Mechanical testing . 7
10 Test equipment . 7
11 Determination of the tensile energy welding factor . 7
12 Test report . 8
Annex A (normative) Cutting specimens of thickness > 30 mm into two or more layers . 9
Annex B (informative)  Test speeds for some thermoplastic materials . 10
European foreword
This document (EN 12814-7:2024) has been prepared by Technical Committee CEN/TC 249 “Plastics”,
the secretariat of which is held by SIS.
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 September 2024, and conflicting national standards shall
be withdrawn at the latest by September 2024.
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 12814-7:2002.
In comparison with the previous edition, the following technical modifications have been made:
— the symbols in “Figure 1 — Waisted tensile test specimen” have been added to “Table 1 — Symbols
and designations”;
— modification in Clause 6 following dimensions of test specimens;
— “Table 2 — Dimensions of test specimens” has been added;
— in Table B.1, the test speed for PA-U materials has been added.
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 organisations 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.
1 Scope
This document specifies the dimensions, the method of sampling, the preparation of the test specimens
and the conditions for performing the tensile test with waisted test specimens in order to determine the
tensile energy welding factor.
A tensile test with waisted specimens can be used in conjunction with other tests (e.g. bend, tensile,
tensile creep, macro, etc.) to assess the performance of welded assemblies, made from thermoplastics
materials.
The test is applicable to co-axial or co-planar heated tool butt welded assemblies made from
thermoplastics materials filled or unfilled, but not reinforced. It is not applicable to tubular assemblies
with a nominal outside diameter less than 90 mm.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements o
...