Vitreous and porcelain enamels - Enamelled cooking utensils - Determination of resistance to thermal shock (ISO 2747:1998)

This International Standard specifies a method of determining, by successive thermal shock tests, the
behaviour of vitreous and porcelain enamelled cooking utensils and similar articles under sudden
changes of temperature (resistance to thermal shock).

Emails und Emaillierungen - Emaillierte Kochgeschirre - Bestimmung der Temperaturwechselbeständigkeit (ISO 2747:1998)

Émaux vitrifiés - Ustensiles de cuisson émaillés - Détermination de la résistance aux chocs thermiques (ISO 2747:1998)

Steklasti in porcelanski emajli - Emajlirani kuhinjski pripomočki - Ugotavljanje odpornosti proti hitrim temperaturnim spremembam (ISO 2747:1998)

General Information

Status
Published
Public Enquiry End Date
16-Aug-2022
Publication Date
19-Oct-2022
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
11-Oct-2022
Due Date
16-Dec-2022
Completion Date
20-Oct-2022

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Standards Content (sample)

SLOVENSKI STANDARD
SIST EN ISO 2747:2022
01-december-2022
Steklasti in porcelanski emajli - Emajlirani kuhinjski pripomočki - Ugotavljanje
odpornosti proti hitrim temperaturnim spremembam (ISO 2747:1998)
Vitreous and porcelain enamels - Enamelled cooking utensils - Determination of
resistance to thermal shock (ISO 2747:1998)
Emails und Emaillierungen - Emaillierte Kochgeschirre - Bestimmung der
Temperaturwechselbeständigkeit (ISO 2747:1998)

Émaux vitrifiés - Ustensiles de cuisson émaillés - Détermination de la résistance aux

chocs thermiques (ISO 2747:1998)
Ta slovenski standard je istoveten z: EN ISO 2747:2022
ICS:
25.220.50 Emajlne prevleke Enamels
97.040.60 Kuhinjska posoda, jedilni Cookware, cutlery and
servisi in jedilni pribor flatware
SIST EN ISO 2747:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 2747:2022
---------------------- Page: 2 ----------------------
SIST EN ISO 2747:2022
EN ISO 2747
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2022
EUROPÄISCHE NORM
ICS 25.220.50
English Version
Vitreous and porcelain enamels - Enamelled cooking
utensils - Determination of resistance to thermal shock
(ISO 2747:1998)

Émaux vitrifiés - Ustensiles de cuisson émaillés - Emails und Emaillierungen - Emaillierte Kochgeschirre

Détermination de la résistance aux chocs thermiques - Bestimmung der Temperaturwechselbeständigkeit

(ISO 2747:1998) (ISO 2747:1998)
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 2747:2022 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 2747:2022
EN ISO 2747:2022 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 2747:2022
EN ISO 2747:2022 (E)
European foreword

The text of ISO 2747:1998 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 2747:2022 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 2747:1998 has been approved by CEN as EN ISO 2747:2022 without any modification.

---------------------- Page: 5 ----------------------
SIST EN ISO 2747:2022
---------------------- Page: 6 ----------------------
SIST EN ISO 2747:2022
INTERNATIONAL ISO
STANDARD 2747
Second edition
1998-03-15
Vitreous and porcelain enamels —
Enamelled cooking utensils —
Determination of resistance to thermal
shock
Émaux vitrifiés — Ustensiles de cuisson émaillés — Détermination de la
résistance aux chocs thermiques
Reference number
ISO 2747:1998(E)
---------------------- Page: 7 ----------------------
SIST EN ISO 2747:2022
ISO 2747:1998(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.
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.
International Standard ISO 2747 was prepared by Technical Committee
ISO/TC 107, Metallic and other inorganic coatings, Subcommittee SC 6,
Vitreous and porcelain enamels.
This second edition cancels and replaces the first edition (ISO 2747:1973),
which has been technically revised.
Annex A of this International Standard is for information only.
© ISO 1998

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced

or utilized in any form or by any means, electronic or mechanical, including photocopying and

microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet central@iso.ch
X.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
---------------------- Page: 8 ----------------------
SIST EN ISO 2747:2022
INTERNATIONAL STANDARD ISO ISO 2747:1998(E)
Vitreous and porcelain enamels — Enamelled cooking utensils —
Determination of resistance to thermal shock
1 Scope

This International Standard specifies a method of determining, by successive thermal shock tests,

the behaviour of vitreous and porcelain enamelled cooking utensils and similar articles under

sudden changes of temperature (resistance to therma
...

SLOVENSKI STANDARD
oSIST prEN ISO 2747:2022
01-julij-2022
Steklasti in porcelanski emajli - Emajlirani kuhinjski pripomočki - Ugotavljanje
odpornosti proti hitrim temperaturnim spremembam (ISO 2747:1998)
Vitreous and porcelain enamels - Enamelled cooking utensils - Determination of
resistance to thermal shock (ISO 2747:1998)

Emails - Emaillierte Kochgeschirre - Bestimmung der Temperaturwechselbeständigkeit

(ISO 2747:1998)

Émaux vitrifiés - Ustensiles de cuisson émaillés - Détermination de la résistance aux

chocs thermiques (ISO 2747:1998)
Ta slovenski standard je istoveten z: prEN ISO 2747
ICS:
25.220.50 Emajlne prevleke Enamels
97.040.60 Kuhinjska posoda, jedilni Cookware, cutlery and
servisi in jedilni pribor flatware
oSIST prEN ISO 2747:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 2747:2022
---------------------- Page: 2 ----------------------
oSIST prEN ISO 2747:2022
INTERNATIONAL ISO
STANDARD 2747
Second edition
1998-03-15
Vitreous and porcelain enamels —
Enamelled cooking utensils —
Determination of resistance to thermal
shock
Émaux vitrifiés — Ustensiles de cuisson émaillés — Détermination de la
résistance aux chocs thermiques
Reference number
ISO 2747:1998(E)
---------------------- Page: 3 ----------------------
oSIST prEN ISO 2747:2022
ISO 2747:1998(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.
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.
International Standard ISO 2747 was prepared by Technical Committee
ISO/TC 107, Metallic and other inorganic coatings, Subcommittee SC 6,
Vitreous and porcelain enamels.
This second edition cancels and replaces the first edition (ISO 2747:1973),
which has been technically revised.
Annex A of this International Standard is for information only.
© ISO 1998

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced

or utilized in any form or by any means, electronic or mechanical, including photocopying and

microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet central@iso.ch
X.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
---------------------- Page: 4 ----------------------
oSIST prEN ISO 2747:2022
INTERNATIONAL STANDARD ISO ISO 2747:1998(E)
Vitreous and porcelain enamels — Enamelled cooking utensils —
Determination of resistance to thermal shock
1 Scope

This International Standard specifies a method of determining, by successive thermal shock tests,

the behaviour of vitreous and porcelain enamelled cooking utensils and similar articles under

sudden changes of temperature (resistance to thermal shock).
2 Definitions

For the purposes of this International Standard, the following definitions apply.

2.1 thermal shock test: Series of operations commencing with the pouring of cold water into the

heated test specimen and ending when the thermal shock temperature for the subsequent

thermal shock test has been reached.

2.2 thermal shock temperature: Temperature to which the test specimen is heated before being

chilled with cold water.

2.3 thermal shock resistance: Difference between the thermal shock temperature and the water

temperature at which the test specimen shows the first damage on chilling or during subsequent

heating.

2.4 damage: Chipping or tension cracks in the enamel visible at a distance of 250 mm by normal

sight or made visible by using coloured penetrating fluids.
3 Principle

A series of single thermal shock tests is conducted with a temperature increase of 20 °C between

each thermal shock obtained by heating the test specimen from the outside and then chilling it

inside with water at 20 °C.

For the first test, the thermal shock temperature amounts to 200 °C. The test ends when the first

visible damage occurs.
---------------------- Page: 5 ----------------------
oSIST prEN ISO 2747:2022
ISO
ISO 2747:1998(E)
4 Apparatus

4.1 Electric hot-plate, capable of being continously temperature controlled, and of diameter and

maximum output as given in table 1.
Table 1 - Hot-plates to be used to heat specimens
Internal diameter Hot-plate
of specimen
Diameter Maximum output
mm mm W
Up to 180 145 1 000 ± 100
Over 180 and up to 220 180 1 500 ± 150
Over 220 220 2 000 ± 200

For testing specimens with an uneven base, the hot-plate shall be surmounted by a ring filled

with copper grit of grain size 0,100 mm to 0,125 mm.
4.2 Temperature measuring device, quickly indicating, accurate to 2 °C.
4.3 Thermometer for measuring the temperature of the water.
4.4 Chamois leather, paper towel or laboratory tissue.
4.5 Water receptacle.
4.6 Stop-watch.
5 Test specimens and sampling
5.1 Use the utensils to be tested as test specimens without any modification.
5.2 The test spec
...

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