SIST EN ISO 12944-3:2018
(Main)Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 3: Design considerations (ISO 12944-3:2017)
Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 3: Design considerations (ISO 12944-3:2017)
This document deals with the basic criteria for the design of steel structures to be coated by protective
paint systems in order to avoid premature corrosion and degradation of the coating or the structure.
It gives examples of appropriate and inappropriate design, indicating how problems of application,
inspection and maintenance of paint systems can be avoided. Design measures which facilitate handling
and transport of the steel structures are also considered.
Beschichtungsstoffe - Korrosionsschutz von Stahlbauten durch Beschichtungssysteme - Teil 3: Grundregeln zur Gestaltung (ISO 12944-3:2017)
Dieser Teil von ISO 12944 behandelt Grundregeln zur Gestaltung von mit Beschichtungssystemen zu ver-sehenden Stahlbauten, um vorzeitige Korrosion und Schäden der Beschichtung oder des Bauwerks zu ver-meiden. Die Norm gibt Beispiele für geeignetes und ungeeignetes Gestalten und zeigt, wie Schwierig¬keiten beim Auftragen, beim Überwachen und beim Instandsetzen von Beschichtungssystemen vermieden wer-den können. Gestaltungsregeln, welche die Handhabung und den Transport von Stahlbauten erleichtern, sind ebenfalls enthalten.
Peintures et vernis - Anticorrosion des structures en acier par systèmes de peinture - Partie 3: Conception et dispositions constructives (ISO 12944-3:2017)
ISO 12944-3:2017 traite des critères fondamentaux de conception des structures en acier qui doivent être revêtues de systèmes de peinture afin d'éviter la corrosion prématurée et la détérioration du revêtement ou de la structure. Il donne des exemples de bonnes et de mauvaises dispositions, en indiquant comment les problèmes d'application, du contrôle et de l'entretien des systèmes de peinture peuvent être évités. Il examine également les dispositions qui facilitent la manutention et le transport des structures en acier.
Barve in laki - Protikorozijska zaščita jeklenih konstrukcij z zaščitnimi premaznimi sistemi - 3. del: Osnovna pravila za načrtovanje konstrukcije (ISO 12944-3:2017)
Ta dokument obravnava osnovna merila glede zasnove jeklenih konstrukcij, ki jih je treba zaščititi z zaščitnimi premaznimi sistemi, da se prepreči prezgodnja korozija in degradacija premaza ali konstrukcije. Podaja primere ustrezne in neustrezne zasnove ter opisuje, kako se je mogoče izogniti težavam pri nanosu, pregledu in vzdrževanju premaznih sistemov. Upoštevani so tudi pogoji zasnove, ki omogočajo lažje upravljanje in prevoz jeklenih konstrukcij.
General Information
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Related Packages
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 12944-3:2018
01-februar-2018
1DGRPHãþD
SIST EN ISO 12944-3:1998
%DUYHLQODNL3URWLNRUR]LMVND]DãþLWDMHNOHQLKNRQVWUXNFLM]]DãþLWQLPLSUHPD]QLPL
VLVWHPLGHO 2VQRYQDSUDYLOD]DQDþUWRYDQMHNRQVWUXNFLMH ,62
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
SIST EN ISO 12944-3:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 12944-3:2018
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SIST EN ISO 12944-3:2018
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.
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SIST EN ISO 12944-3:2018
EN ISO 12944-3:2017 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 12944-3:2018
EN ISO 12944-3:2017 (E)
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.
3
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SIST EN ISO 12944-3:2018
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SIST EN ISO 12944-3:2018
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
---------------------- Page: 7 ----------------------
SIST EN ISO 12944-3:2018
ISO 12944-3:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© 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
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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 12944-3:2018
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 2017 – All rights reserved iii
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SIST EN ISO 12944-3:2018
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.
A list of all parts in the ISO 12944 series can be found on the ISO website.
iv © ISO 2017 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 12944-3:2018
ISO 12944-3:2017(E)
Introduction
Unprotected steel in the atmosphere, in water and in soil is subjected to corrosion that can lead to
damage. Therefore, to avoid corrosion damage, steel structures are normally protected to withstand
the corrosion stresses to which they will be subjected during the service life required of the structure.
There are different ways of protecting steel structures from corrosion. ISO 12944 (all parts) deals with
protection by paint systems and covers, in the various parts, all features that are important in achieving
adequate corrosion protection. Additional or other measures are possible but require particular
agreement between the interested parties.
In order to ensure effective corrosion protection of steel structures, owners of such structures, planners,
consultants, companies carrying out corrosion protection work, inspectors of protective coatings
and manufacturers of coating materials need to have at their disposal state-of-the-art information in
concise form on corrosion protection by paint systems. It is vital that such information is as complete as
possible, unambiguous and easily understandable to avoid difficulties and misunderstandings between
the parties concerned with the practical implementation of protection work.
ISO 12944 (all parts) is intended to give this information in the form of a series of instructions.
It is written for those who have some technical knowledge. It is also assumed that the user of
ISO 12944 (all parts) is familiar with other relevant International Standards, in particular those dealing
with surface preparation.
Although ISO 12944 (all parts) does not deal with financial and contractual questions, attention is
drawn to the fact that, because of the considerable implications of inadequate corrosion protection,
non-compliance with requirements and recommendations given in ISO 12944 (all parts) can result in
serious financial consequences.
ISO 12944-1 defines the overall scope of ISO 12944. It gives some basic terms and definitions and a
general introduction to the other parts of ISO 12944. Furthermore, it includes a general statement on
health, safety and environmental protection, and guidelines for using ISO 12944 (all parts) for a given
project.
This document gives guidance on how to minimize the risk of corrosion by appropriate design measures
for steel structures to be coated by protective paint systems.
© ISO 2017 – All rights reserved v
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SIST EN ISO 12944-3:2018
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SIST EN ISO 12944-3:2018
INTERNATIONAL STANDARD ISO 12944-3:2017(E)
Paints and varnishes — Corrosion protection of steel
structures by protective paint systems —
Part 3:
Design considerations
1 Scope
This document deals with the basic criteria for the design of steel structures to be coated by protective
paint systems in order to avoid premature corrosion and degradation of the coating or the structure.
It gives examples of appropriate and inappropriate design, indicating how problems of application,
inspection and maintenance of paint systems can be avoided. Design measures which facilitate handling
and transport of the steel structures are also considered.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles — Specifications and test methods
ISO 8501-1, Preparation of steel substrates before application of paints and related products — Visual
assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates
and of steel substrates after overall removal of previous coatings
ISO 8501-3, Preparation of steel substrates before application of paints and related products — Visual
assessment of surface cleanliness — Part 3: Preparation grades of welds, edges and other areas with surface
imperfections
ISO 12944-1, Paints and varnishes — Corrosion protection of steel structures by protective paint systems —
Part 1: General introduction
ISO 12944-2, Paints and varnishes
...
SLOVENSKI STANDARD
oSIST prEN ISO 12944-3:2016
01-april-2016
%DUYHLQODNL.RUR]LMVND]DãþLWDMHNOHQLKNRQVWUXNFLM]]DãþLWQLPLSUHPD]QLPL
VLVWHPLGHO 8SRãWHYDQMHYUVWHLQQDþLQDREOLNRYDQMDNRQVWUXNFLMH ,62',6
Paints and varnishes - Corrosion protection of steel structures by protective coating
systems - Part 3: Design considerations (ISO/DIS 12944-3:2016)
Beschichtungsstoffe - Korrosionsschutz von Stahlbauten durch Beschichtungssysteme -
Teil 3: Grundregeln zur Gestaltung (ISO/DIS 12944-3:2016)
Peintures et vernis - Anticorrosion des structures en acier par systèmes de revêtement -
Partie 3: Conception et dispositions constructives (ISO/DIS 12944-3:2016)
Ta slovenski standard je istoveten z: prEN ISO 12944-3
ICS:
25.220.20 Površinska obdelava Surface treatment
87.020 Postopki za nanašanje Paint coating processes
barvnih premazov
91.080.10 Kovinske konstrukcije Metal structures
oSIST prEN ISO 12944-3:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 12944-3:2016
---------------------- Page: 2 ----------------------
oSIST prEN ISO 12944-3:2016
DRAFT INTERNATIONAL STANDARD
ISO/DIS 12944-3
ISO/TC 35/SC 14 Secretariat: DIN
Voting begins on: Voting terminates on:
2016-01-28 2016-04-28
Paints and varnishes — Corrosion protection of steel
structures by protective coating systems —
Part 3:
Design considerations
Peintures et vernis — Anticorrosion des structures en acier par systèmes de revêtement —
Partie 3: Conception et dispositions constructives
ICS: 87.020
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for
Standardization (ISO), and processed under the ISO lead mode of collaboration
as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member
bodies for a parallel five month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments
received, will be submitted to a parallel two-month approval vote in ISO and
THIS DOCUMENT IS A DRAFT CIRCULATED
formal vote in CEN.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
To expedite distribution, this document is circulated as received from the
IN ADDITION TO THEIR EVALUATION AS
committee secretariat. ISO Central Secretariat work of editing and text
BEING ACCEPTABLE FOR INDUSTRIAL,
composition will be undertaken at publication stage.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 12944-3:2015(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2015
---------------------- Page: 3 ----------------------
oSIST prEN ISO 12944-3:2016
ISO/DIS 12944-3:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© 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
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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 12944-3:2016
ISO/DIS 12944-3
Contents Page
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General . 1
5 Basic design criteria for corrosion protection purposes . 2
5.1 General . 2
5.2 Accessibility . 2
5.3 Treatment of gaps . 3
5.4 Precautions to prevent retention of deposits and water . 3
5.5 Surface imperfections . 3
5.6 Bolted connections . 3
5.7 Box members and hollow components . 4
5.8 Notches . 4
5.9 Stiffeners . 4
5.10 Prevention of galvanic corrosion . 4
5.11 Handling, transport and erection . 5
Annex A (informative) Accessibility – Typical distances required for tools in corrosion
protection work . 6
Annex C (informative) Minimum dimensions for narrow spaces between surfaces . 8
Bibliography . 14
© ISO 2002 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 12944-3:2016
ISO/DIS 12944-3
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
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.
ISO 12944-3 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 (ISO12944-3:1998), which has been technically
revised.
ISO 12944 consists of the following parts, under the general title Paints and varnishes — Corrosion protection
of steel structures by protective coating systems:
Part 1: General introduction
Part 2: Classification of environments
Part 3: Design considerations
Part 4: Types of surface and surface preparation
Part 5: Protective paint systems
Part 6: Laboratory performance test methods
Part 7: Execution and supervision of paint work
Part 8: Development of specifications for new work and maintenance
Part 9: Protective paint systems and laboratory performance test methods for offshore and related
structures
Annexes A to D of this part of ISO 12944 are for information only.
iv © ISO 2002 – All rights reserved
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oSIST prEN ISO 12944-3:2016
ISO/DIS 12944-3
Introduction
Unprotected steel in the atmosphere, in water and in soil is subjected to corrosion that may lead to damage.
Therefore, to avoid corrosion damage, steel structures are normally protected to withstand the corrosion
stresses during the service life required of the structure.
There are different ways of protecting steel structures from corrosion. ISO 12944 deals with protection by
paint systems and covers, in the various parts, all features that are important in achieving adequate corrosion
protection. Additional or other measures are possible but require particular agreement between the interested
parties.
In order to ensure effective corrosion protection of steel structures, it is necessary for owners of such
structures, planners, consultants, companies carrying out corrosion protection work, inspectors of protective
coatings and manufacturers of coating materials to have at their disposal state-of-the-art information in
concise form on corrosion protection by paint systems. Such information has to be as complete as possible,
unambiguous and easily understandable to avoid difficulties and misunderstandings between the parties
concerned with the practical implementation of protection work.
This International Standard - ISO 12944 - is intended to give this information in the form of a series of
instructions. It is written for those who have some technical knowledge. It is also assumed that the user of ISO
12944 is familiar with other relevant International Standards, in particular those dealing with surface
preparation, as well as relevant national regulations.
Although ISO 12944 does not deal with financial and contractual questions, attention is drawn to the fact that,
because of the considerable implications of inadequate corrosion protection, non-compliance with
requirements and recommendations given in this standard may result in serious financial consequences.
ISO 12944-1 defines the overall scope of all parts of ISO 12944. It gives some basic terms and definitions and
a general introduction to the other parts of ISO 12944. Furthermore, it includes a general statement on health,
safety and environmental protection, and guidelines for using ISO 12944 for a given project.
This part of ISO 12944 gives guidance on how to minimize the risk of corrosion by appropriate design
measures for steel structures to be coated by protective paint systems.
© ISO 2002 – All rights reserved v
---------------------- Page: 7 ----------------------
oSIST prEN ISO 12944-3:2016
---------------------- Page: 8 ----------------------
oSIST prEN ISO 12944-3:2016
DRAFT INTERNATIONAL STANDARD ISO/DIS 12944-3
Paints and varnishes — Corrosion protection of steel structures
by protective coating systems — Part 3: Design considerations
1 Scope
This part of ISO 12944 deals with the basic criteria for the design of steel structures to be coated by protective
paint systems in order to avoid premature corrosion and degradation of the coating or the structure. It gives
examples of appropriate and inappropriate design, indicating how problems of application, inspection and
maintenance of paint systems can be avoided. Design measures which facilitate handling and transport of the
steel structures are also considered.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles - Specifications and test methods
ISO 8501-1, Preparation of steel substrates before application of paints and related products - Visual
assessment of surface cleanliness - Part 1: Rust grades and preparation grades of uncoated steel substrates
and of steel substrates after overall removal of previous coatings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in the other parts of ISO 12944 and the
following apply.
3.1
design (noun)
way in which a structure is built up, as represented by a detailed plan of the structure, considering corrosion
protection
4 General
The objective of designing a structure is to ensure that the structure is suitable for its function, has adequate
stability, strength and durability, is constructed at an acceptable cost and is aesthetically pleasing.
The overall design shall be planned to facilitate surface preparation, painting, inspection and maintenance.
The shape of a structure can influence its susceptibility to corrosion. Therefore structures should be designed
such that corrosion cannot easily establish a foothold (a corrosion trap) from which it can spread. It is therefore
strongly recommended that the designer consults a corrosion protection expert at a very early stage in the
design process. Ideally, the corrosion protection system should be selected at that time, with due consideration
to the type of service of the structure, its service life and maintenance requirements.
The shapes of the structural elements and the methods used to join them should be such that fabrication,
joining and any subsequent treatment will not promote corrosion. Similarly, consideration should be given to
the shape of the structure and its elements with respect to the category of its environment (see ISO 12944-2)
when specifying a protective paint system.
© ISO 2002 – All rights reserved 1
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oSIST prEN ISO 12944-3:2016
ISO/DIS 12944-3
Designs should be simple and excessive complexity should be avoided. Where steel components are in
contact, embedded or enclosed in other building materials, e.g. brickwork, they are no longer accessible,
therefore, the corrosion protection measures shall be effective throughout the service life of the structure.
Steelwork to be hot-dip galvanized shall be designed in accordance with the requirements of ISO 1461 and ISO
14713.
5 Basic design criteria for corrosion protection purposes
5.1 General
The surfaces of steel structures exposed to
...
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