Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 8: Development of specifications for new work and maintenance (ISO 12944-8:2017)

This document covers the development of specifications for corrosion protection of steel structures
using protective paint systems. It relates to new work and maintenance in the workshop or on site
and is also applicable to the corrosion protection of individual components. This document covers
the corrosion protection of steel structures exposed to different corrosion stresses by environments
such as indoors, open-air and immersion in water or burial in soil, as well as special stresses, due for
example, to medium or high temperatures. The need for different durability ranges is considered.
Steel surfaces that have been hot-dip-galvanized, metal-sprayed, zinc-electroplated or sherardized, and
previously painted steel surfaces, are also covered by this document.
In this document, reference areas for assessing the quality of the corrosion protection work and the
performance of the protective paint systems used are dealt with. This document provides detailed
flow charts for planning new work and maintenance, which are taken into account when writing a
specification.
This document can also be used as a guide if extreme corrosion stresses or high temperatures occur,
or if the protective paint systems are to be used on other substrates, such as non-ferrous metals or
concrete, to define suitable specifications.

Beschichtungsstoffe - Korrosionsschutz von Stahlbauten durch Beschichtungssysteme - Teil 8: Erarbeiten von Spezifikationen für Erstschutz und Instandsetzung (ISO 12944-8:2017)

In diesem Dokument wird die Erarbeitung von Spezifikationen für den Korrosionsschutz von Stahlbauten durch Beschichtungssysteme behandelt. Es bezieht sich auf Erstschutz und Instandsetzung, im Werk oder auf der Baustelle, und ist auch auf den Korrosionsschutz von einzelnen Bauteilen anwendbar. In diesem Dokument werden der Korrosionsschutz von Stahlbauten, die unterschiedlichen Korrosionsbelastungen durch Umgebungen, wie z. B. in Innenräumen, im Freien sowie in Wasser oder im Erdreich ausgesetzt sind, sowie Sonderbelastungen, z. B. durch mittlere oder hohe Temperaturen, behandelt. Die Notwendigkeit unterschiedlicher Zeitspannen für die Schutzdauer wird berücksichtigt.
Stahloberflächen, die feuerverzinkt, thermisch gespritzt, galvanisch verzinkt oder sherardisiert wurden sowie bereits zuvor beschichtete Stahloberflächen werden in diesem Dokument ebenfalls erfasst.
In diesem Dokument werden Kontrollflächen zum Bewerten der Qualität der Korrosionsschutzarbeiten und der Leistungsfähigkeit der angewendeten Beschichtungssysteme behandelt. Dieses Dokument enthält detaillierte Fließdiagramme für die Planung von Erstschutz- und Instandsetzungsarbeiten, die beim Erstellen einer Spezifikation berücksichtigt werden sollten.
Dieses Dokument kann auch als Leitfaden zur Festlegung geeigneter Spezifikationen angewendet werden, wenn außergewöhnliche Korrosionsbelastungen oder äußerst hohe Temperaturen auftreten oder wenn die Beschichtungssysteme für andere Untergründe, z. B. Nichteisenmetalle oder Beton, zu verwenden sind.

Peintures et vernis - Anticorrosion des structures en acier par systèmes de peinture - Partie 8: Développement de spécifications pour les travaux neufs et de maintenance (ISO 12944-8:2017)

L'ISO 12944-8 :2017 couvre le développement de spécifications relatives à la protection contre la corrosion des structures en acier au moyen de systèmes de peinture anticorrosion. Elle s'applique aux travaux neufs et à la maintenance en atelier ou sur site, ainsi qu'à la protection contre la corrosion des éléments individuels. L'ISO 12944-8 :2017 couvre la protection anticorrosion des structures en acier exposées à différentes contraintes de corrosion dues à l'environnement ? intérieur, extérieur, immersion dans l'eau ou enfouissement dans le sol ? ainsi qu'à des contraintes spéciales, qu'elles soient dues à des températures moyennes ou élevées. Il prend en considération l'existence de besoins différents en matière de durabilité.
L'ISO 12944-8 :2017 traite également des subjectiles d'acier qui ont été galvanisés au trempé à chaud, revêtus de métal par projection à chaud, électrozingués ou shérardisés, ainsi que des aciers préalablement peints.
Il traite par ailleurs des surfaces de référence permettant d'évaluer la qualité de la protection contre la corrosion et les performances des systèmes de peinture anticorrosion utilisés. L'ISO 12944-8 :2017 propose des logigrammes de planning pour des travaux neufs et de maintenance pour l'élaboration d'une spécification.
L'ISO 12944-8 :2017 peut également servir de guide pour définir des spécifications adaptées en cas de contraintes de corrosion extrêmes ou de températures élevées ou lorsque les systèmes de peinture anticorrosion sont utilisés sur d'autres subjectiles, comme des métaux non-ferreux ou du béton.

Barve in laki - Protikorozijska zaščita jeklenih konstrukcij z zaščitnimi premaznimi sistemi - 8. del: Priprava specifikacij za novogradnje in vzdrževanje (ISO 12944-8:2017)

Ta dokument zajema pripravo specifikacij za protikorozijsko zaščito jeklenih konstrukcij z uporabo zaščitnih premaznih sistemov. Nanaša se na novogradnje in vzdrževanje v delavnici ali na mestu uporabe konstrukcije in se uporablja tudi za protikorozijsko zaščito posameznih sestavnih delov. Ta dokument zajema protikorozijsko zaščito jeklenih konstrukcij, izpostavljenih različnim korozijskim obremenitvam (npr. v zaprtih prostorih, na prostem in pri potopu v vodo ali zakopanosti v zemljo) ter posebnim obremenitvam (npr. zaradi izpostavljenosti srednje visokim ali visokim temperaturam). Upoštevana je potreba po različnih razponih trajnosti.
V tem dokumentu so zajete tudi jeklene površine, ki so bile vroče galvanizirane, kovinsko brizgane, galvanizirane s cinkom ali šeradirane, in predhodno premazane jeklene površine.
V tem dokumentu so obravnavana referenčna območja za ocenjevanje kakovosti ukrepov protikorozijske zaščite in učinkovitosti zaščitnih premaznih sistemov. Ta dokument vključuje podrobne diagrame poteka za načrtovanje novogradenj in vzdrževanja, ki se upoštevajo pri pripravi specifikacije.
Ta dokument se lahko uporablja tudi kot vodilo, če se pojavijo ekstremne korozijske obremenitve ali visoke temperature ali če se zaščitni premazni sistemi uporabljajo za druge podlage, kot so neželezne kovine ali beton, za določitev ustreznih specifikacij.

General Information

Status
Published
Public Enquiry End Date
09-Aug-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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SLOVENSKI STANDARD
SIST EN ISO 12944-8:2018
01-februar-2018
1DGRPHãþD
SIST EN ISO 12944-8:1998

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VLVWHPLGHO3ULSUDYDVSHFLILNDFLM]DQRYRJUDGQMHLQY]GUåHYDQMH ,62



Paints and varnishes - Corrosion protection of steel structures by protective paint

systems - Part 8: Development of specifications for new work and maintenance (ISO

12944-8:2017)

Beschichtungsstoffe - Korrosionsschutz von Stahlbauten durch Beschichtungssysteme -

Teil 8: Erarbeiten von Spezifikationen für Erstschutz und Instandsetzung (ISO 12944-

8:2017)

Peintures et vernis - Anticorrosion des structures en acier par systèmes de peinture -

Partie 8: Développement de spécifications pour les travaux neufs et de maintenance

(ISO 12944-8:2017)
Ta slovenski standard je istoveten z: EN ISO 12944-8:2017
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 12944-8:2018 en,fr,de

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

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SIST EN ISO 12944-8:2018
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SIST EN ISO 12944-8:2018
EN ISO 12944-8
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2017
EUROPÄISCHE NORM
ICS 87.020 Supersedes EN ISO 12944-8:1998
English Version
Paints and varnishes - Corrosion protection of steel
structures by protective paint systems - Part 8:
Development of specifications for new work and
maintenance (ISO 12944-8:2017)

Peintures et vernis - Anticorrosion des structures en Beschichtungsstoffe - Korrosionsschutz von

acier par systèmes de peinture - Partie 8: Stahlbauten durch Beschichtungssysteme - Teil 8:

Développement de spécifications pour les travaux Erarbeiten von Spezifikationen für Erstschutz und

neufs et de maintenance (ISO 12944-8:2017) Instandsetzung (ISO 12944-8:2017)
This European Standard was approved by CEN on 17 November 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 12944-8:2017 E

worldwide for CEN national Members.
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SIST EN ISO 12944-8:2018
EN ISO 12944-8:2017 (E)
Contents Page

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

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SIST EN ISO 12944-8:2018
EN ISO 12944-8:2017 (E)
European foreword

This document (EN ISO 12944-8:2017) 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 12944-8:1998.

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 12944-8:2017 has been approved by CEN as EN ISO 12944-8:2017 without any

modification.
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SIST EN ISO 12944-8:2018
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SIST EN ISO 12944-8:2018
INTERNATIONAL ISO
STANDARD 12944-8
Second edition
2017-11
Paints and varnishes — Corrosion
protection of steel structures by
protective paint systems —
Part 8:
Development of specifications for new
work and maintenance
Peintures et vernis — Anticorrosion des structures en acier par
systèmes de peinture —
Partie 8: Développement de spécifications pour les travaux neufs et de
maintenance
Reference number
ISO 12944-8:2017(E)
ISO 2017
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SIST EN ISO 12944-8:2018
ISO 12944-8:2017(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 12944-8:2018
ISO 12944-8:2017(E)
Contents Page

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

Introduction ..................................................................................................................................................................................................................................v

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

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

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

4 How to develop a specification for new work or maintenance ............................................................................ 3

5 Contents of a specification .......................................................................................................................................................................... 4

5.1 Supply ............................................................................................................................................................................................................. 4

Annex A (informative) Basic information for inclusion in a protective paint system

specification for new work and maintenance .....................................................................................................................12

Annex B (informative) Reference areas ..........................................................................................................................................................14

Annex C (informative) Flow chart for planning new work..........................................................................................................17

Annex D (informative) Flow chart for planning maintenance work .................................................................................19

Annex E (informative) Classification of environments — Checklist (derived from ISO 12944‑2).....20

Annex F (informative) Recommended form for a protective paint system specification —

New work ...................................................................................................................................................................................................................22

Annex G (informative) Recommended form for a protective paint system

specification — Maintenance ...............................................................................................................................................................23

Annex H (informative) Recommended form for a report on paint work progress and

application conditions .................................................................................................................................................................................25

Annex I (informative) Recommended form for final report on corrosion protection work ....................27

Annex J (informative) Recommended form for a detailed inspection report on the condition

of an existing protective paint system, including the assessment of the need

for maintenance .................................................................................................................................................................................................30

Bibliography .............................................................................................................................................................................................................................34

© ISO 2017 – All rights reserved iii
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SIST EN ISO 12944-8:2018
ISO 12944-8:2017(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 12944-8:1998), which has been

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

— water soluble contaminants and dust have been added in Table 1 as particular constraints with

respect to surfaces and surface preparation;
— Annex E has been updated with regard to corrosivity classes;
— Annex I has been updated with regard to surface preparations;
— the bibliography has been updated;
— 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 12944-8:2018
ISO 12944-8:2017(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 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 document is intended as an aid when a corrosion protection specification is to be drawn up.

© ISO 2017 – All rights reserved v
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SIST EN ISO 12944-8:2018
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SIST EN ISO 12944-8:2018
INTERNATIONAL STANDARD ISO 12944-8:2017(E)
Paints and varnishes — Corrosion protection of steel
structures by protective paint systems —
Part 8:
Development of specifications for new work and
maintenance
1 Scope

This document covers the development of specifications for corrosion protection of steel structures

using protective paint systems. It relates to new work and maintenance in the workshop or on site

and is also applicable to the corrosion protection of individual components. This document covers

the corrosion protection of steel structures exposed to different corrosion stresses by environments

such as indoors, open-air and immersion in water or burial in soil, as well as special stresses, due for

example, to medium or high temperatures. The need for different durability ranges is considered.

Steel surfaces that have been hot-dip-galvanized, metal-sprayed, zinc-electroplated or sherardized, and

previously painted steel surfaces, are also covered by this document.

In this document, reference areas for assessing the quality of the corrosion protection work and the

performance of the protective paint systems used are dealt with. This document provides detailed

flow charts for planning new work and maintenance, which are taken into account when writing a

specification.

This document can also be used as a guide if extreme corrosion stresses or high temperatures occur,

or if the protective paint systems are to be used on other substrates, such as non-ferrous metals or

concrete, to define suitable specifications.
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 12944-1, Paints and varnishes — Corrosion protection of steel structures by protective paint systems —

Part 1: General introduction
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 12944-1 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
© ISO 2017 – All rights reserved 1
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SIST EN ISO 12944-8:2018
ISO 12944-8:2017(E)
3.1
constituent element

part of a structure that is exposed to a particular environment and which will therefore require a

specific protective paint system specification (3.8.2)

Note 1 to entry: For example, a storage tank will have more than one constituent element as it comprises internal

and external surfaces and possibly also support steelwork.
3.2
dry film thickness
DFT
thickness of a coating remaining on the surface when the coating has hardened
Note 1 to entry: For details, see ISO 12944-5:— , 5.4.
3.3
durability

expected life of a protective paint system to the first major maintenance (3.5) painting

Note 1 to entry: For further important information on durability and durability ranges, see ISO 12944-1.

3.4
inspector

anyone responsible for ensuring conformity with one or more of the individual specifications (3.8)

3.5
maintenance

sum of all measures, as covered by ISO 12944 (all parts), which ensure that the steel structure is

protected from corrosion

Note 1 to entry: Maintenance includes, but is not limited to, paint work. Such paint work can be patch painting

(repair of degradated spots/areas of the coating system), patch painting followed by overpainting of the

structure, or total repainting.
3.6
nominal dry film thickness
NDFT

dry film thickness (3.2) specified for each coat or for the whole paint system to achieve the required

durability (3.3)
Note 1 to entry: For details, see ISO 12944-5: — , 5.4.
3.7
project

whole of the work for which a specification (3.8) is being developed and which can include one or more

structures
3.8
specification

technical document describing all the requirements to be observed when a steel structure is to

be protected against corrosion by using protective coating systems and which consists of several

individual specifications

Note 1 to entry: Individual specifications, i.e. project specification (3.8.1), protective paint system specification

(3.8.2), paint work specification (3.8.3), inspection and assessment specification (3.8.4), are defined.

3.8.1
project specification

specification (3.8) that describes the project (3.7) and the requirements relating specifically to it

1) Under preparation.
2 © ISO 2017 – All rights reserved
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SIST EN ISO 12944-8:2018
ISO 12944-8:2017(E)
3.8.2
protective paint system specification

specification (3.8) that describes the preparation of the surface of the structure and the protective

coating system(s) for the structure, in conformity with the project specification (3.8.1)

3.8.3
paint work specification

specification (3.8) that describes the way the coating work is to be carried out, in conformity with

the project specification (3.8.1) and the protective paint system specification (3.8.2), as well as with the

inspection and assessment specification (3.8.4)
3.8.4
inspection and assessment specification

specification (3.8) that describes how inspection and assessment are to be carried out

3.9
specifier
anyone responsible for the development of a specification (3.8)
3.10
sample area
area on which the properties of a newly applied coating are tested
3.11
touch-up
application of coating material on a small area
4 How to develop a specification for new work or maintenance

It is recommended that the specifier considers the information given in Clause 5 and establishes which

specification(s) apply/applies to the project or constituent element to be protected. Then, the specifier

should check in the respective table, item by item, which of the items listed are to be taken into account

in the specification. The various items are supported by detailed information given in the "Remarks"

column in Tables 1 to 4 and in Annexes A to J.

When writing a specification for new work or maintenance, it is important to choose the most suitable

protective paint system. Prior to refurbishment, it can be helpful to create sample areas, e.g. to assess

the coating suitability and appearance. To achieve this, all relevant parameters shall be taken into

consideration, for example:
— required durability;
— environmental conditions and special stresses;
— surface preparation;
— different generic types of paint;

— number and types of coats [priming coat(s), intermediate coat(s) and top coat(s)];

— methods of application and application requirements;
— place of application (shop or site);
— scaffolding requirements;
— requirements regarding (future) maintenance (if any);
— health and safety requirements;
— environmental protection requirements.
© ISO 2017 – All rights reserved 3
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SIST EN ISO 12944-8:2018
ISO 12944-8:2017(E)

These parameters are described in detail in ISO 12944-1 to ISO 12944-7 and ISO 12944-9. In this

document, only information which is considered to be particularly important to the specifier is given.

In the drafting of a specification for maintenance work on a structure or constituent element, a decision

needs to be made to choose between
— repair,
— partial renewal, or
— complete renewal.

When complete renewal has been decided on, the specification should preferably be developed in

accordance with a specification for new work, e.g. using the form given in Annex G.

In Annex D, it is shown how to define the work for different types of maintenance work. The exact

definition of which kind of work is necessary shall be decided in dependence of the structure. Test areas

can be useful to find a sufficient solution.

At an early stage in the drafting of a project specification, a final decision will have to be taken by the

specifier on essential planning parameters, such as protection of slip-resistant connections using high-

tensile bolts, the inside surfaces of hollow sections and other hidden steel surfaces (see ISO 12944-3 for

details of design).

Exclusions, i.e. items not to be painted, shall be indicated in the specification(s).

The choice of protective paint systems shall be based on practical experience and/or the results of

laboratory performance tests, particularly when new coating technology is involved. The protective

paint systems shall be tested for compatibility with existing coatings on previously coated surfaces.

The specifier shall further take into account regulations and/or requirements relating to environmental

protection, health and safety, and working conditions in the shop or on site.
5 Contents of a specification
5.1 Supply

The items which are preferably to be covered by a specification are listed in Tables 1 to 4, under the

following headings:
— contents of a project specification (see Table 1);
— contents of a protective paint system specification (see Table 2);
— contents of a paint work specification (see Table 3);
— contents of an inspection and assessment specification (see Table 4).

For small structures, or those whose protection is not subject to any particular requirements, only

certain items shall be taken into account.

NOTE Each table contains sufficient information to enable the specifier to write a specification for any

one of the subjects listed above without having to make frequent references to the other tables. This has led to

some expressions being repeated in each of the tables: for example, under 1.1, 2.1, 3.1 and 4.1, the items “name

of project”, “name of customer” and “name of specifier” are repeated. In practice, such information is to be given

only once in the complete specification.
4 © ISO 2017 – All rights reserved
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SIST EN ISO 12944-8:2018
ISO 12944-8:2017(E)
Table 1 — Contents of a project specification
No. Main item/sub-item Remarks
1.1 GENERAL INFORMATION
1.1.1 Name of project
1.1.2 Name of customer
1.1.3 Location(s) of structure(s)
1.1.4 Name of specifier State organization and person.
1.1.5 Environmental conditions at location(s) of See Annex E and ISO 12944-2.
structure(s)
1.1.6 References to standards and regulations
1.2 TYPE OF PROJECT For definitions of project, structure and constit-
uent element, see Clause 3.
1.2.1 New construction without protection
1.2.2 New construction blast-cleaned and coated
1.2.3 Touch-up and final paint work
1.2.4 Maintenance See Annexes H, I and J.
1.2.5 New construction and maintenance combined
1.2.6 Items not to be coated

1.3 DESCRIPTION OF EACH CONSTITUENT Each structure should preferably be divided into

ELEMENT constituent elements on the basis of the protec-
tive paint system(s) to be used and the corro-
sion stresses associated with each constituent
element.
1.3.1 Substrate(s) Metallic coatings, e.g. zinc, are part of the coat-
ing system.
1.3.2 Existing paint system and its condition See ISO 12944-5.
1.3.3 Areas (m )

1.4 DESCRIPTION OF ENVIRONMENT OF EACH Descriptions are given in ISO 12944-2. See also

CONSTITUENT ELEMENT Annex E.
1.4.1 Atmospheric environmental conditions See E.1.1.
1.4.2 Immersed categories See E.2.
1.4.3 Special situations See E.4.1.
1.4.4 Special stresses See E.4.2.
1.5 DURABILITY
1.5.1 Durability range See ISO 12944-1.

These items are recommended. If, however, a particular sub-item is included in the specification, any instructions in

the remarks column shall be followed.
© ISO 2017 – All rights reserved 5
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SIST EN ISO 12944-8:2018
ISO 12944-8:2017(E)
Table 1 (continued)
No. Main item/sub-item Remarks
1.6 PROTECTIVE PAINT SYSTEMS — Details of types of surface, surface preparation
PARTICULAR CONSTRAINTS WITH grades, surface profiles and surface preparation
RESPECT TO SURFACES AND SURFACE methods can be found in ISO 12944-4. In the
PREPARATION specification, the required surface preparation
grade shall be given for each individual protec-
tive paint system to be used.

1.6.1 Types of surface and surface preparation Besides the surface preparation grade, the

grade(s) for new work and maintenance specification shall give details of the surface

preparation work required. See also Annexes G
and H and Table 3.
1.6.2 Surface preparation method(s) See ISO 12944-4.
1.6.3 Water-soluble contaminants See ISO 8502-6 and ISO 8502-9.
1.6.4 Dust See ISO 8502-3.
1.7 PROTECTIVE PAINT SYSTEMS — PARTICULAR CONSTRAINTS WITH RESPECT TO PAINT
MATERIALS
1.7.1 Choice of the coating system

1.7.1.1 Protective paint systems for initial protection See ISO 12944-5, ISO 12944-7, ISO 12944-9 and

and complete renewal Annexes G and H, and Table 2.

1.7.1.2 Protective paint systems for repair and partial Systems according to ISO 12944-5 and

renewal ISO 12944-9.
Corrosion protection may be assessed using
sample areas.

1.7.2 Particular constraints relating to coatings and For example: compatibility with existing

paint work coatings, edge protection (see ISO 12944-5 and
ISO 12944-7), non-skid coatings or spraying
with airless rather than conventional equ
...

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