SIST EN ISO 4532:2022

Vitreous and porcelain enamels - Determination of the resistance of enamelled articles to impact - Pistol test (ISO 4532:1991)

Specifies a test method which is used as a factory production control test. The test is not intended to be used for testing the adhesion of the enamel. Annexes A and B are for information only.

Emails und Emaillierungen - Bestimmung des Widerstandes emaillierter Gegenstände gegen Schlag - Schlagbolzen-Schlagversuch (ISO 4532:1991)

Émaux vitrifiés - Détermination de la résistance au choc des pièces émaillées - Essai au pistolet (ISO 4532:1991)

La présente Norme internationale prescrit une méthode d'essai pour la détermination de la résistance au choc de pièces émaillées. La méthode est utilisée dans les essais de contrôle de production en usine.  
NOTE 1 L'essai au pistolet n'est pas à utiliser dans les essais d'adhésion d'émail.

Steklasti in porcelanski emajli - Ugotavljanje odpornosti emajliranih izdelkov proti udarcem - Preskus s pištolo (ISO 4532:1991)

General Information

• Status: Published
• Public Enquiry End Date: 16-Aug-2022
• Publication Date: 19-Oct-2022
• ICS: 25.220.50 - Enamels
• Technical Committee: IPKZ - Protection of metals against corrosion
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 11-Oct-2022
• Due Date: 16-Dec-2022
• Completion Date: 20-Oct-2022
• Ref Project: EN ISO 4532:2022 - Vitreous and porcelain enamels - Determination of the resistance of enamelled articles to impact - Pistol test (ISO 4532:1991)

Overview

EN ISO 4532:2022 - "Vitreous and porcelain enamels - Determination of the resistance of enamelled articles to impact - Pistol test (ISO 4532:1991)" specifies a factory production control test method (pistol test) for assessing the impact resistance of vitreous and porcelain enamelled articles. The standard describes the test apparatus, procedure, evaluation criteria and reporting requirements. It is not intended to assess enamel adhesion.

Key topics and technical requirements

• Test apparatus: spring‑loaded striking bolt with a 5 mm steel ball tip, adjustable spring load (0–90 N), spring length 100 mm (unloaded). The spring constant is 20 N/cm ± 0.5 N/cm. Reading error of the apparatus should not exceed 3% in its application range.
• Principle: firing the ball‑tipped striking bolt against the enamelled surface; the load that first causes visible damage indicates impact sensitivity.
• Specimens and sampling:
  • Test the enamelled articles themselves; sampling and specimen count are agreed between supplier and customer. If no agreement, test at least two specimens.
  • Carry out at least five pistol tests per test program, maintaining a minimum 20 mm between impacts or between an impact and existing damage.
• Procedure:
  • Preliminary sequence: start at 10 N, increase by 10 N until no visible damage; then increase in 2 N steps until first visible damage occurs.
  • Observe the impact point from 250 mm and record the type of damage (cracking, spalling, chipping, powdering). The impression of the striking bolt alone is not considered damage.
  • Final evaluation is made after 24 hours; optional use of dye/ink or ISO 2746 high‑voltage test to enhance visibility.
• Calibration: Annex A (informative) covers calibration and determination of apparatus zero point; graph method used to verify spring constant and zero deviation.
• Reporting: include reference to EN ISO 4532:2022, specimen description (dimensions, mass, enamel/metal thickness if available), number of specimens and tests, support type, positions tested, spring load causing damage (rounded to nearest 2 N), and photos if appropriate.

Practical applications

• Factory production control and quality checks of enamelled cookware, sanitaryware, bathware, panels and other enamelled components.
• Routine verification of enamel toughness and batch consistency during manufacturing.
• Acceptance testing between suppliers and customers where impact resistance is a contractual attribute.

Who uses this standard

• Quality engineers and laboratory technicians in enamel manufacturing and finishing plants
• Production managers, product certification bodies, and purchasing/QA teams specifying impact resistance in procurement
• Test laboratories performing standardized impact tests on vitreous and porcelain enamels

Related standards

• ISO 2746 - Vitreous and porcelain enamels: high‑voltage test (referenced for adjunct testing)
• EN ISO 4532:2022 is the CEN adoption of ISO 4532:1991 and is maintained under CEN/TC 262 and ISO/TC 107.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2022
Steklasti in porcelanski emajli - Ugotavljanje odpornosti emajliranih izdelkov proti
udarcem - Preskus s pištolo (ISO 4532:1991)
Vitreous and porcelain enamels - Determination of the resistance of enamelled articles to
impact - Pistol test (ISO 4532:1991)
Emails und Emaillierungen - Bestimmung des Widerstandes emaillierter Gegenstände
gegen Schlag - Schlagbolzen-Schlagversuch (ISO 4532:1991)
Émaux vitrifiés - Détermination de la résistance au choc des pièces émaillées - Essai au
pistolet (ISO 4532:1991)
Ta slovenski standard je istoveten z: EN ISO 4532:2022
ICS:
25.220.50 Emajlne prevleke Enamels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 4532
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2022
EUROPÄISCHE NORM
ICS 25.220.50
English Version
Vitreous and porcelain enamels - Determination of the
resistance of enamelled articles to impact - Pistol test (ISO
4532:1991)
Émaux vitrifiés - Détermination de la résistance au Emails und Emaillierungen - Bestimmung des
choc des pièces émaillées - Essai au pistolet (ISO Widerstandes emaillierter Gegenstände gegen Schlag -
4532:1991) Schlagbolzen-Schlagversuch (ISO 4532:1991)
This European Standard was approved by CEN on 19 September 2022.

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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4532:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 4532:1991 has been prepared by Technical Committee ISO/TC 107 "Metallic and other
inorganic coatings” of the International Organization for Standardization (ISO) and has been taken over
as EN ISO 4532:2022 by Technical Committee CEN/TC 262 “Metallic and other inorganic coatings,
including for corrosion protection and corrosion testing of metals and alloys” the secretariat of which is
held by BSI.
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 March 2023, and conflicting national standards shall
be withdrawn at the latest by March 2023.
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.
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 4532:1991 has been approved by CEN as EN ISO 4532:2022 without any modification.

INTERNATIONAL
STANDARD 4532
First edi tion
1991-12-01
Vitreous and porcelain enamels -
Determination of the resistance of enamelled
articles to impact - Pistol test
Emaux vifrifi& - Determination de la rksistance au choc des pikes
6maiMes - Essai au pistolet
VD, --- .v--
-----
---
Reference number
- .-- ISO 4532:1991(E)
-.-____-_ _ - ._.
ISO 4532:1991(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. Esch 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, govern-
mental 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.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an Inter-
national Standard requires approval by at least 75 % of the member
bodies casting a vote.
International Standard ISO 4532 was prepared by Technical Committee
ISO/TC 107, Metallic and other inorganbc coafings, Sub-Committee SC
6, Vitreous and porcelain enamels.
lt is based on a test method developed by a committee of the VDEfa. The
VDEfa Technical Report No. 4 [l] describes the development of the
Pistol test and gives comprehensive information on numerous Pistol
tests carried out on different shapes of test specimens.
Annexes A and B of this International Standard are for information only.
6 ISO 1991
All rights reserved. No part of this publication may be reproduced or utilized in any form
or by any means, electronie or mechanical, including photocopying and microfilm, without
Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-121 1 Geneve 20 * Switzerland
Printed in Switzerland
ii
INTERNATIONAL STANDARD ISO 4532:1991 (E)
Vitreous and porcelain enamels - Determination of the
resistance of enamelled articles to impact - Pistol test
1 Scope 4 Apparatus
This International Standard specifies a test method
for determining the resistance of enamelled articles
to impact.
The test apparatus (see figure 1) consists of a strik-
The method is used as a factory production control
ing bolt with a 5 mm steel ball tip which is shot once
test.
against the surface under test by means of a press-
ure spri
...