Vitreous and porcelain enamels - Regenerative, enamelled and packed panels for air-gas and gas-gas heat exchangers - Specifications (ISO 28763:2019)

This document specifies the minimum requirements and the functional characteristics of enamel coatings applied by any process, such as wet dipping, wet flow-coating, wet spraying, wet electrostatic spraying, wet electrodeposition or dry-powder electrostatic spraying, to profiled steel heat exchanger panels in regenerative heat exchangers, before and after packing in baskets. For very severe service conditions, or to obtain extended operational life, more stringent limits can be agreed between customer and supplier.

Emails und Emaillierungen - Regenerative, emaillierte und gepackte Bleche für Luft-Gas- und Gas-Gas-Wärmeaustauscher - Anforderungen (ISO 28763:2019)

Dieses Dokument legt die Mindestanforderungen und funktionellen Eigenschaften von Emailschichten auf profilierten Stahlblechen für Wärmeaustauscher in regenerativen Wärmeaustauschern fest, vor und nach dem Packen in Körben; sie gilt für Emailschichten, die nach einem beliebigen Verfahren hergestellt sind, wie z. B. nach dem Tauchverfahren, Fluten, Spritzauftrag, elektrostatischen Spritzen, Elektrotauchemaillieren oder elektrostatischen Pulverauftrag.
Für sehr strenge Betriebsbedingungen oder zur Verlängerung der Lebensdauer können zwischen dem Kunden und dem Lieferant strengere Grenzen vereinbart werden.

Émaux vitrifiés - Échangeurs thermiques pour réchauffeurs air-gaz et gaz-gaz à empilement de panneaux émaillés remplaçables et démontables - Spécifications (ISO 28763:2019)

Le présent document spécifie les exigences minimales et les caractéristiques fonctionnelles des revêtements émaillés utilisés au cours de tout processus d'émaillage, tels que le trempage dans un liquide, l'aspersion humide, la pulvérisation humide, la pulvérisation électrostatique humide, l'électrodéposition humide ou la pulvérisation électrostatique sèche, sur des panneaux en acier profilé d'échangeurs thermiques remplaçables et démontables, avant et après assemblage dans les paniers.
Des limites plus exigeantes peuvent faire l'objet d'un accord entre le client et le fournisseur dans le cas de conditions de service très difficiles ou dans le but de prolonger la durée de fonctionnement.

Steklasti in porcelanski emajli - Regenerativne, emajlirane in pakirane plošče za toplotne izmenjevalnike »zrak-plin« in »plin-plin« - Specifikacije (ISO 28763:2019)

Ta dokument določa minimalne zahteve in funkcionalne lastnosti emajliranih prevlek, nanesenih s katerim koli procesom, kot je mokro namakanje, mokro brizganje, mokro pršenje, mokro elektrostatsko pršenje, mokra elektrodepozicija ali elektrostatsko pršenje s suhim praškom, na profilirane jeklene plošče za toplotne izmenjevalnike v regenerativnih toplotnih izmenjevalnikih pred pakiranjem v koše in po njem. Naročnik in dobavitelj se lahko dogovorita o strožjih mejnih vrednostih za zelo stroge servisne pogoje ali za podaljšano življenjsko dobo.

General Information

Status
Published
Public Enquiry End Date
19-Dec-2018
Publication Date
28-Oct-2019
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
03-Oct-2019
Due Date
08-Dec-2019
Completion Date
29-Oct-2019

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SLOVENSKI STANDARD
SIST EN ISO 28763:2019
01-december-2019
Nadomešča:
SIST EN ISO 28763:2012

Steklasti in porcelanski emajli - Regenerativne, emajlirane in pakirane plošče za

toplotne izmenjevalnike »zrak-plin« in »plin-plin« - Specifikacije (ISO 28763:2019)

Vitreous and porcelain enamels - Regenerative, enamelled and packed panels for air-

gas and gas-gas heat exchangers - Specifications (ISO 28763:2019)

Emails und Emaillierungen - Regenerative, emaillierte und gepackte Bleche für Luft-Gas-

und Gas-Gas-Wärmeaustauscher - Anforderungen (ISO 28763:2019)
Émaux vitrifiés - Échangeurs thermiques pour réchauffeurs air-gaz et gaz-gaz à

empilement de panneaux émaillés remplaçables et démontables - Spécifications (ISO

28763:2019)
Ta slovenski standard je istoveten z: EN ISO 28763:2019
ICS:
25.220.50 Emajlne prevleke Enamels
SIST EN ISO 28763:2019 en

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

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SIST EN ISO 28763:2019
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SIST EN ISO 28763:2019
EN ISO 28763
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2019
EUROPÄISCHE NORM
ICS 25.220.50 Supersedes EN ISO 28763:2011
English Version
Vitreous and porcelain enamels - Regenerative, enamelled
and packed panels for air-gas and gas-gas heat exchangers
- Specifications (ISO 28763:2019)

Émaux vitrifiés - Échangeurs thermiques pour Emails und Emaillierungen - Regenerative, emaillierte

réchauffeurs air-gaz et gaz-gaz à empilement de und gepackte Bleche für Luft-Gas- und Gas-Gas-

panneaux émaillés remplaçables et démontables - Wärmeaustauscher - Anforderungen (ISO 28763:2019)

Spécifications (ISO 28763:2019)
This European Standard was approved by CEN on 13 August 2019.

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, Turkey 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

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 28763:2019 E

worldwide for CEN national Members.
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SIST EN ISO 28763:2019
EN ISO 28763:2019 (E)
Contents Page

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

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SIST EN ISO 28763:2019
EN ISO 28763:2019 (E)
European foreword

This document (EN ISO 28763:2019) 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, 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 2020, and conflicting national standards shall

be withdrawn at the latest by March 2020.

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 ISO 28763:2011.

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, 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, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 28763:2019 has been approved by CEN as EN ISO 28763:2019 without any modification.

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SIST EN ISO 28763:2019
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SIST EN ISO 28763:2019
INTERNATIONAL ISO
STANDARD 28763
Second edition
2019-08
Vitreous and porcelain enamels —
Regenerative, enamelled and packed
panels for air-gas and gas-gas heat
exchangers — Specifications
Émaux vitrifiés — Échangeurs thermiques pour réchauffeurs air-
gaz et gaz-gaz à empilement de panneaux émaillés remplaçables et
démontables — Spécifications
Reference number
ISO 28763:2019(E)
ISO 2019
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SIST EN ISO 28763:2019
ISO 28763:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
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SIST EN ISO 28763:2019
ISO 28763:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Steel substrates ...................................................................................................................................................................................................... 2

4.1 Delivery ......................................................................................................................................................................................................... 2

4.2 Analysis.......................................................................................................................................................................................................... 2

4.3 Hydrogen permeability .................................................................................................................................................................... 2

4.4 Fish scaling test ...................................................................................................................................................................................... 2

4.5 Pickling speed .......................................................................................................................................................................................... 3

5 Enamel frit................................................................................................................................................................................................................... 3

5.1 Delivery ......................................................................................................................................................................................................... 3

5.2 Coefficient of expansion .................................................................................................................................................................. 3

5.3 Fusion flow ................................................................................................................................................................................................. 3

5.4 Boiling-water (vapour phase) resistance ......................................................................................................................... 3

5.5 Acid resistance ........................................................................................................................................................................................ 3

5.6 Thermal-shock resistance ............................................................................................................................................................. 3

5.7 Adherence ................................................................................................................................................................................................... 4

6 Characteristics of the enamel coating ............................................................................................................................................ 4

6.1 Adherence ................................................................................................................................................................................................... 4

6.2 Thickness ..................................................................................................................................................................................................... 4

6.3 Thermal-shock resistance ............................................................................................................................................................. 5

6.4 Fundamental defects .......................................................................................................................................................................... 5

6.5 Open defects .............................................................................................................................................................................................. 5

6.6 Edge covering of gas-gas heaters ............................................................................................................................................ 6

6.7 Boiling sulfuric acid resistance ................................................................................................................................................. 6

6.8 Rework ........................................................................................................................................................................................................... 6

7 Characteristics after packing ................................................................................................................................................................... 6

7.1 Packing pressure ................................................................................................................................................................................... 6

7.2 Visual examination .............................................................................................................................................................................. 6

7.3 Edge covering of gas-gas heaters ............................................................................................................................................ 7

8 Documentation ....................................................................................................................................................................................................... 7

Annex A (normative) Method for determining thermal-shock resistance of vitreous or

porcelain enamel coatings ......................................................................................................................................................................... 8

© ISO 2019 – All rights reserved iii
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SIST EN ISO 28763:2019
ISO 28763:2019(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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso

.org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings.

This second edition cancels and replaces the first edition (ISO 28763:2008), which has been technically

revised. The main changes compared with previous edition are as follows:
— the normative references have been updated;
— the terms and definitions have been updated;
— references to normative documents and respective clauses have been updated;

— references and requirements for hydrogen permeability of steel have been updated in Clause 4;

— requirements for visual examinations have been amended in Clause 6.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
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SIST EN ISO 28763:2019
INTERNATIONAL STANDARD ISO 28763:2019(E)
Vitreous and porcelain enamels — Regenerative,
enamelled and packed panels for air-gas and gas-gas heat
exchangers — Specifications
1 Scope

This document specifies the minimum requirements and the functional characteristics of enamel

coatings applied by any process, such as wet dipping, wet flow-coating, wet spraying, wet electrostatic

spraying, wet electrodeposition or dry-powder electrostatic spraying, to profiled steel heat exchanger

panels in regenerative heat exchangers, before and after packing in baskets
...

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