EN ISO 12944-3:2017

SLOVENSKI STANDARD
01-februar-2018
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SIST EN ISO 12944-3:1998
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Paints and varnishes - Corrosion protection of steel structures by protective paint
systems - Part 3: Design considerations (ISO 12944-3:2017)
Beschichtungsstoffe - Korrosionsschutz von Stahlbauten durch Beschichtungssysteme -
Teil 3: Grundregeln zur Gestaltung (ISO 12944-3:2017)
Peintures et vernis - Anticorrosion des structures en acier par systèmes de peinture -
Partie 3: Conception et dispositions constructives (ISO 12944-3:2017)
Ta slovenski standard je istoveten z: EN ISO 12944-3:2017
ICS:
25.220.20 Površinska obdelava Surface treatment
87.040 Barve in laki Paints and varnishes
91.080.13 Jeklene konstrukcije Steel structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 12944-3
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2017
EUROPÄISCHE NORM
ICS 87.020; 91.080.13 Supersedes EN ISO 12944-3:1998
English Version
Paints and varnishes - Corrosion protection of steel
structures by protective paint systems - Part 3: Design
considerations (ISO 12944-3:2017)
Peintures et vernis - Anticorrosion des structures en Beschichtungsstoffe - Korrosionsschutz von
acier par systèmes de peinture - Partie 3: Conception et Stahlbauten durch Beschichtungssysteme - Teil 3:
dispositions constructives (ISO 12944-3:2017) Grundregeln zur Gestaltung (ISO 12944-3:2017)
This European Standard was approved by CEN on 30 October 2017.

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, 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
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12944-3:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 12944-3:2017) has been prepared by Technical Committee ISO/TC 35 “Paints
and varnishes” in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the
secretariat of which is held by DIN.
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 2018, and conflicting national standards shall be
withdrawn at the latest by June 2018.
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 12944-3:1998.
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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 12944-3:2017 has been approved by CEN as EN ISO 12944-3:2017 without any
modification.
INTERNATIONAL ISO
STANDARD 12944-3
Second edition
2017-11
Paints and varnishes — Corrosion
protection of steel structures by
protective paint systems —
Part 3:
Design considerations
Peintures et vernis — Anticorrosion des structures en acier par
systèmes de peinture —
Partie 3: Conception et dispositions constructives
Reference number
ISO 12944-3:2017(E)
©
ISO 2017
ISO 12944-3:2017(E)
© ISO 2017, 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 2017 – All rights reserved

ISO 12944-3:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General . 2
5 Basic design criteria for corrosion protection purposes . 2
5.1 General . 2
5.2 Accessibility . 3
5.3 Treatment of gaps . 3
5.4 Precautions to prevent retention of deposits and water . 3
5.5 Surface imperfections . 4
5.6 Bolted connections . 4
5.6.1 Slip-resistant connections with high-tensile bolts . 4
5.6.2 Preloaded connections . 4
5.6.3 Bolts, nuts and washers . 4
5.7 Box members and hollow components . 4
5.8 Notches . 4
5.9 Stiffeners . 5
5.10 Prevention of galvanic corrosion . 5
5.11 Handling, transport and erection . 5
Annex A (informative) Accessibility — Typical distances required for tools in corrosion
protection work . 6
Annex B (informative) Recommended minimum dimensions of openings for access to
confined areas . 7
Annex C (informative) Minimum dimensions for narrow spaces between surfaces .8
Annex D (informative) Design features which can be used to avoid deposits accumulating
or water being trapped .10
Bibliography .14
ISO 12944-3:2017(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 on 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 the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee
SC 14, Protective paint systems for steel structures.
This second edition cancels and replaces the first edition (ISO 12944-3:1998), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— the terms and definitions which were not used in the main part of the standard have been deleted;
— the normative references have been updated;
— 5.1 "General" has been added;
— the requirement for gap sealing material has been added in 5.3;
— the requirements for surface preparation in case of high and very high durabilities for C4 and higher,
as well as Im1 to Im4, have been added;
— the title of Table A.1 has been corrected;
— a key has been added to Figure B.1;
— Figure D.1 c) has been deleted;
— the requirements for the radius in Figures D.5 and D.7 have been added;
— a bibliography has been added;
— the text has been editorially revised.
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