Abstract

ISO 17132:2007 describes a method of evaluating the flexibility and adhesion of an organic coating on a metallic substrate by observing the cracking or loss of adhesion when a coated test panel is bent.
The method can be used to confirm whether paints, varnishes or related products meet a given test requirement in a pass/fail test, or to determine the minimum bending diameter at which cracking does not occur.

Status
Published
Publication Date
13-Nov-2008
Technical Committee
IBLP - Paints and varnishes
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
13-Nov-2008
Due Date
18-Jan-2009
Completion Date
14-Nov-2008

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SIST EN ISO 17132:2009

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SIST EN ISO 17132:2009 is the Slovenian adoption of EN ISO 17132:2007, aligned with ISO 17132:2007. It specifies the T-bend test for paints and varnishes on metallic substrates, where a coated panel is bent and checked for cracking or loss of adhesion. Coating producers, test laboratories, and buyers use it to confirm pass/fail requirements or to find the smallest bend that does not cause failure.

What does SIST EN ISO 17132:2009 specify?

SIST EN ISO 17132:2009 specifies a method for evaluating the flexibility and adhesion of an organic coating on a metallic substrate by bending a coated panel and observing whether the coating cracks or detaches.

The document is organized into clauses on:

  • principle
  • apparatus
  • sampling
  • test panels
  • procedure
  • supplementary information
  • expression of results
  • precision
  • test report

It also includes one informative annex.

AnnexWhat it covers
Annex ACorrelation between the ISO rating system and the European, American and Japanese T-bend systems

What are the key requirements of SIST EN ISO 17132:2009?

SIST EN ISO 17132:2009 requires the test to be performed by bending a coated test panel through 180° with the coated side on the outside of the bend, then checking for cracking and loss of adhesion. In practice, this is the core measure of coating performance under severe deformation.

  • Clause 4 - test principle: The panel is bent at progressively smaller radii until failure no longer occurs, and that bend is taken as the T-bend rating. This tells the reader how the result is defined: the coating is judged by the smallest bend it survives.
  • Clause 5 - apparatus: The test uses a vice with flat smooth jaws, a magnifying glass with 5x to 10x magnification, and adhesive tape with specified adhesive strength. In practice, the lab needs the right tools to make the bend consistently and to check adhesion in the same way every time.
  • Clauses 6 and 7 - sampling and test panels: The sample must be representative, the panels are normally rectangular steel panels with plane surfaces, and dry coating thickness is determined using ISO 2808. This matters because the panel and coating preparation influence the bend result.
  • Clause 8.1 to 8.3 - conditioning, test conditions and bending: Unless otherwise agreed, coated panels are conditioned for at least 16 h at 23 °C and 50 % relative humidity, and the test is also carried out at those conditions. The standard allows three bending methods - mandrel, spacer panels, or repeated folding - so users can select the method agreed for the product or customer.
  • Clause 8.3 - bend direction: Bending is normally across the direction of rolling, except for coil coatings, which are bent parallel to the rolling direction. This is important because rolling direction can affect cracking behavior.
  • Clause 8.4 and 8.5 - evaluation and pass/fail use: Cracking is examined immediately with the magnifying glass, and adhesion loss is checked with adhesive tape unless agreed otherwise. The same bend methods can also be used as pass/fail tests, so the procedure serves both classification work and simple acceptance checks.
  • Clauses 10 and 11 - reporting and precision: Results are reported as the greatest bend reached without cracking or loss of adhesion, and the document gives repeatability and reproducibility data for the spacer method. This helps users compare results and understand how close two test outcomes should be.

What terms does SIST EN ISO 17132:2009 define?

  • T-bend test - A test used to determine coating flexibility by bending a coated test panel through 180°.
  • T-bend rating - The minimum number of spacers, or equivalent mandrel size, that a panel can be bent around without cracking or loss of adhesion.
  • Coated test panel - The prepared panel carrying the coating under test.
  • Mandrel - A rounded guide around which the coated panel is bent in one of the test methods.
  • Spacer panel - An uncoated panel used inside the bend to create a defined bending diameter.
  • Repeatability - The closeness of results when the same material is tested under the same conditions in a short time.
  • Reproducibility - The closeness of results when the same material is tested in different laboratories.

Who uses SIST EN ISO 17132:2009?

SIST EN ISO 17132:2009 is used by coating manufacturers, coating laboratories, and quality control teams working with paints, varnishes, and related products on metal. It is also used by specifiers and buyers who need a pass/fail check for coated sheet or coil products. In practice, they use it to compare formulations, verify production batches, and confirm whether a coating can withstand bending without cracking or flaking.

Which standards are used with SIST EN ISO 17132:2009?

The document depends on these referenced standards for preparation and measurement steps:

  • ISO 1513 - sample examination and preparation before testing
  • ISO 1514 - standard panels for testing
  • ISO 2808 - dry film thickness measurement
  • ISO 15528 - sampling of paints, varnishes and raw materials
  • IEC 60454-2 - test method for pressure-sensitive adhesive tape used in the adhesion check

The introduction and annex also place the method alongside other deformation and T-bend standards, including ISO 1519, ISO 1520, ISO 6272, ISO 6860, EN 13523-7, ASTM D 4145, and JIS G 3312.

What does the SIST EN ISO 17132:2009 document contain?

SIST EN ISO 17132:2009 contains the test principle, apparatus list, sampling guidance, panel preparation steps, and three alternative bending methods. It also gives the inspection method for cracking and adhesion loss, the way to state results, and a precision statement based on round-robin testing. Figures show the mandrel, spacer, and folding arrangements, while Annex A gives a comparison of the ISO rating system with European, American, and Japanese T-bend systems.

Relations

Effective Date
28-Jan-2026
Effective Date
28-Jan-2026
Effective Date
28-Jan-2026

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SIST EN ISO 17132:2009

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Frequently Asked Questions

SIST EN ISO 17132:2009 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Paints and varnishes - T-bend test (ISO 17132:2007)". This standard covers: ISO 17132:2007 describes a method of evaluating the flexibility and adhesion of an organic coating on a metallic substrate by observing the cracking or loss of adhesion when a coated test panel is bent. The method can be used to confirm whether paints, varnishes or related products meet a given test requirement in a pass/fail test, or to determine the minimum bending diameter at which cracking does not occur.

ISO 17132:2007 describes a method of evaluating the flexibility and adhesion of an organic coating on a metallic substrate by observing the cracking or loss of adhesion when a coated test panel is bent. The method can be used to confirm whether paints, varnishes or related products meet a given test requirement in a pass/fail test, or to determine the minimum bending diameter at which cracking does not occur.

SIST EN ISO 17132:2009 is classified under the following ICS (International Classification for Standards) categories: 87.040 - Paints and varnishes. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN ISO 17132:2009 has the following relationships with other standards: It is inter standard links to SIST-TP CEN/TR 15350:2014, SIST EN 4018:2009, SIST EN ISO 527-5:1999. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

SIST EN ISO 17132:2009 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-januar-2009
Barve in laki - T-upogibni preskus (ISO 17132:2007)
Paints and varnishes - T-bend test (ISO 17132:2007)
Beschichtungsstoffe - T-Biegeprüfung (ISO 17132:2007)
Peintures et vernis - Essai de pliage en T (ISO 17132:2007)
Ta slovenski standard je istoveten z: EN ISO 17132:2007
ICS:
87.040 Barve in laki Paints and varnishes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 17132
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2007
ICS 87.040
English Version
Paints and varnishes - T-bend test (ISO 17132:2007)
Peintures et vernis - Essai de pliage en T (ISO Beschichtungsstoffe - T-Biegeprüfung (ISO 17132:2007)
17132:2007)
This European Standard was approved by CEN on 30 September 2007.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17132:2007: E
worldwide for CEN national Members.

Contents Page
Foreword.3

Foreword
This document (EN ISO 17132:2007) has been prepared by Technical Committee ISO/TC 35 "Paints and
varnishes" in collaboration with Technical Committee CEN/TC 139 "Paints and varnishes", the secretariat of
which is held by DIN.
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 April 2008, and conflicting national standards shall be withdrawn at the
latest by April 2008.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 17132:2007 has been approved by CEN as a EN ISO 17132:2007 without any modification.

INTERNATIONAL ISO
STANDARD 17132
First edition
2007-10-01
Paints and varnishes — T-bend test
Peintures et vernis — Essai de pliage en T

Reference number
ISO 17132:2007(E)
©
ISO 2007
ISO 17132:2007(E)
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ii © ISO 2007 – All rights reserved

ISO 17132:2007(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Principle.1
5 Apparatus .2
6 Sampling.2
7 Test panels .2
7.1 Substrate .2
7.2 Preparation and coating.2
7.3 Thickness of the coating.2
8 Procedure .2
8.1 Conditioning of the test panels .2
8.2 Test conditions .2
8.3 Bending.3
8.4 Evaluation.5
8.5 T-bend test as a pass/fail test.5
9 Supplementary information.5
10 Expression of results .5
11 Precision.6
11.1 General.6
11.2 Repeatability, r .6
11.3 Reproducibility, R.6
12 Test report .6
Annex A (informative) Correlation between the ISO rating system and other systems .7
Bibliography .8

ISO 17132:2007(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 17132 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9,
General test methods for paints and varnishes.
iv © ISO 2007 – All rights reserved

ISO 17132:2007(E)
Introduction
This International Standard is one of five standards which specify empirical test procedures for assessing the
resistance of coatings of paints, varnishes and related products to cracking and/or detachment from the
substrate under different conditions of deformation. The other International Standards are ISO 1519,
ISO 1520, ISO 6272 and ISO 6860.
The T-bend test has already been standardized in the USA (ASTM D 4145), Europe (EN 13523-7) and Japan
(JIS G 3312). The test methods in these standards are basically the same, but differ from each other in details
such as
⎯ whether the coated test panel is folded back on itself or is bent round a mandrel or a test panel used as a
spacer;
⎯ the way in which the test result is expressed.
In this International Standard, the basic contents common to the US, European and Japanese standards have
been adopted, but details in which the US, European and Japanese standards differ, in particular the use of a
mandrel or spacer panels, have been made subject to agreement between the interested parties.

INTERNATIONAL STANDARD ISO 17132:2007(E)

Paints and varnishes — T-bend test
1 Scope
This International Standard describes a method of evaluating the flexibility and adhesion of an organic coating
on a metallic substrate by observing the cracking or loss of adhesion when a coated test panel is bent.
The method can be used to confirm whether paints, varnishes or related products meet a given test
requirement in a pass/fail test, or to determine the minimum bending diameter at which cracking does not
occur.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 1513, Paints and varnishes — Examination and preparation of samples for testing
ISO 1514, Paints and varnishes — Standard panels for testing
ISO 2808, Paints and varnishes — Determination of film thickness
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
IEC 60454-2, Specification for pressure-sensitive adhesive tapes for ele
...