EN ISO 28721-2:2015

SLOVENSKI STANDARD
01-marec-2016
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SIST EN ISO 28721-2:2011
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Vitreous and porcelain enamels - Glass-lined apparatus for process plants - Part 2:
Designation and specification of resistance to chemical attack and thermal shock (ISO
28721-2:2015)
Emails und Emaillierungen - Emaillierte Apparate für verfahrenstechnische Anlagen - Teil
2: Bezeichnung und Festlegung der chemischen und Temperaturschockbeständigkeit
(ISO 28721-2:2015)
Émaux vitrifiés - Appareils émaillés pour les installations industrielles - Partie 2:
Désignation et spécifications de la résistance à l'attaque chimique et au choc (ISO 28721
-2:2015)
Ta slovenski standard je istoveten z: EN ISO 28721-2:2015
ICS:
25.220.50 Emajlne prevleke Enamels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 28721-2
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2015
EUROPÄISCHE NORM
ICS 25.220.50 Supersedes EN ISO 28721-2:2011
English Version
Vitreous and porcelain enamels - Glass-lined apparatus for
process plants - Part 2: Designation and specification of
resistance to chemical attack and thermal shock (ISO
28721-2:2015)
Émaux vitrifiés - Appareils émaillés pour les Emails und Emaillierungen - Emaillierte Apparate für
installations industrielles - Partie 2: Désignation et verfahrenstechnische Anlagen - Teil 2: Bezeichnung
spécifications de la résistance à l'attaque chimique et und Festlegung der chemischen und
au choc (ISO 28721-2:2015) Temperaturschockbeständigkeit (ISO 28721-2:2015)
This European Standard was approved by CEN on 1 November 2015.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 28721-2:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 27821-2:2015) has been prepared by Technical Committee ISO/TC 107
"Metallic and other inorganic coatings" in collaboration with Technical Committee CEN/TC 262
“Metallic and other inorganic coatings” 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 June 2016, and conflicting national standards shall be
withdrawn at the latest by June 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN ISO 28721-2:2011.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 28721-2:2015 has been approved by CEN as EN ISO 28721-2:2015 without any
modification.
INTERNATIONAL ISO
STANDARD 28721-2
Second edition
2015-12-01
Vitreous and porcelain enamels —
Glass-lined apparatus for process
plants —
Part 2:
Designation and specification of
resistance to chemical attack and
thermal shock
Émaux vitrifiés — Appareils émaillés pour les installations
industrielles —
Partie 2: Désignation et spécifications de la résistance à l’attaque
chimique et au choc thermique
Reference number
ISO 28721-2:2015(E)
©
ISO 2015
ISO 28721-2:2015(E)
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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ii © ISO 2015 – All rights reserved

ISO 28721-2:2015(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Designation . 1
4 Quality requirements . 2
4.1 Rate of corrosion in hydrochloric acid . 2
4.2 Rate of corrosion in sodium hydroxide solution . 2
4.3 Crack formation temperature . 2
Bibliography .
...