EN ISO 28763:2019

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
• Publication Date: 24-Sep-2019
• Withdrawal Date: 30-Mar-2020
• ICS: 25.220.50 - Enamels
• Technical Committee: CEN/TC 262 - Metallic and other inorganic coatings
• Drafting Committee: CEN/TC 262 - Metallic and other inorganic coatings
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 25-Sep-2019
• Completion Date: 25-Sep-2019
• Ref Project: SIST EN ISO 28763:2019 - Vitreous and porcelain enamels - Regenerative, enamelled and packed panels for air-gas and gas-gas heat exchangers - Specifications (ISO 28763:2019)

Relations

• Replaces: EN ISO 28763:2011 - Vitreous and porcelain enamels - Regenerative, enamelled and packed panels for air-gas and gas-gas heat exchangers - Specifications (ISO 28763:2008)
• Effective Date: 02-Oct-2019

Standards Content (Sample)

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

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.

Contents Page
European foreword . 3

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.

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
ISO 28763:2019(E)
© 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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

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 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 dec
...