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

Status
Published
Public Enquiry End Date
21-Apr-2016
Publication Date
10-Jan-2018
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
27-Dec-2017
Due Date
03-Mar-2018
Completion Date
11-Jan-2018

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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

VLVWHPLGHO2VQRYQDSUDYLOD]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

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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.
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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
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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
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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
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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
...

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