oSIST prEN ISO 8501-3:2024

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/DIS 8501-3:2024)

This document exemplifies imperfections that reduce the longevity of a protective coating system if they are not remedied. The preparation grades given in this document have been selected to make steel with imperfections suitable for corrosion protection by paints and related products.

Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen - Visuelle Beurteilung der Oberflächenreinheit - Teil 3: Vorbereitungsgrade von Schweißnähten, Kanten und anderen Flächen mit Oberflächenunregelmäßigkeiten (ISO/DIS 8501-3:2024)

Préparation des subjectiles d'acier avant application de peintures et de produits assimilés - Évaluation visuelle de la propreté de surface - Partie 3: Degrés de préparation des soudures, arêtes et autres zones présentant des imperfections de surface (ISO/DIS 8501-3:2024)

Priprava jeklenih podlag pred nanašanjem barv in sorodnih premazov - Vizualno ocenjevanje čistosti površine - 3. del: Stopnje priprave zvarov, robov in ostalih površin s površinskmi nepravilnosti (ISO/DIS 8501-3:2024)

General Information

• Status: Not Published
• Public Enquiry End Date: 01-Oct-2024
• ICS: 25.220.10 - Surface preparation
• ICS: 87.020 - Paint coating processes
• Technical Committee: IBLP - Paints and varnishes
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 26-Jul-2024
• Due Date: 13-Dec-2024
• Ref Project: prEN 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/DIS 8501-3:2024)

Relations

• Revises: SIST EN ISO 8501-3:2007 - 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 8501-3:2006)
• Effective Date: 01-Sep-2024

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2024
Priprava jeklenih podlag pred nanašanjem barv in sorodnih premazov - Vizualno
ocenjevanje čistosti površine - 3. del: Stopnje priprave zvarov, robov in ostalih
površin s površinskmi nepravilnosti (ISO/DIS 8501-3:2024)
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/DIS 8501-3:2024)
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen -
Visuelle Beurteilung der Oberflächenreinheit - Teil 3: Vorbereitungsgrade von
Schweißnähten, Kanten und anderen Flächen mit Oberflächenunregelmäßigkeiten
(ISO/DIS 8501-3:2024)
Préparation des subjectiles d'acier avant application de peintures et de produits
assimilés - Évaluation visuelle de la propreté de surface - Partie 3: Degrés de
préparation des soudures, arêtes et autres zones présentant des imperfections de
surface (ISO/DIS 8501-3:2024)
Ta slovenski standard je istoveten z: prEN ISO 8501-3
ICS:
25.220.10 Priprava površine Surface preparation
87.020 Postopki za nanašanje Paint coating processes
barvnih premazov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 8501-3
ISO/TC 35/SC 12
Preparation of steel substrates
Secretariat: BSI
before application of paints
Voting begins on:
and related products — Visual
2024-07-24
assessment of surface cleanliness —
Voting terminates on:
2024-10-16
Part 3:
Preparation grades of welds,
edges and other areas with surface
imperfections
Préparation des subjectiles d'acier avant application de peintures
et de produits assimilés — Évaluation visuelle de la propreté d'un
subjectile —
Partie 3: Degrés de préparation des soudures, arêtes et autres
zones présentant des imperfections
ICS: 25.220.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
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.
Reference number
ISO/DIS 8501-3:2024(en)
DRAFT
ISO/DIS 8501-3:2024(en)
International
Standard
ISO/DIS 8501-3
ISO/TC 35/SC 12
Preparation of steel substrates
Secretariat: BSI
before application of paints
Voting begins on:
and related products — Visual
assessment of surface cleanliness —
Voting terminates on:
Part 3:
Preparation grades of welds,
edges and other areas with surface
imperfections
Préparation des subjectiles d'acier avant application de peintures
et de produits assimilés — Évaluation visuelle de la propreté d'un
subjectile —
Partie 3: Degrés de préparation des soudures, arêtes et autres
zones présentant des imperfections
ICS: 25.220.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 8501-3:2024(en)
ii
ISO/DIS 8501-3:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General information . 2
4.1 Recommended workflow .2
5 Types of imperfections . 2
6 Preparation grades . 2
Annex A (informative) Preparation grade converted into weld quality levels based on ISO
5817:2023 . 10
Bibliography .12

iii
ISO/DIS 8501-3:2024(en)
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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of 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 www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC
12, Preparation of steel substrates before application of paints and related products.
This third edition cancels and replaces the second edition (ISO 8501-3:2006), which has been technically
revised. The main changes compared to the previous edition are as follows:
— Revised illustrations of types of imperfections, Table 1;
— New references to relevant ISO standards;
— Expanded introduction.
A list of all parts in the ISO 8501 series can be found on the ISO website. Any feedback or questions on this
document should be directed to the user’s national standards body. A complete listing of these bodies can be
found at www.iso.org/members.html.

iv
ISO/DIS 8501-3:2024(en)
Introduction
The performance of protective coatings of paint and related products applied to steel is significantly affected
by the state of the steel surface immediately prior to painting. Therefore, it is recommended that the entire
steel building organization, including steel structures designers, is informed about the requirements of this
document.
The principal factors that are known to influence this performance are:
a) the presence of rust and mill scale;
b) the presence of surface contaminants, including salts, dust, oils and greases;
c) the surface profile.
International Standards ISO 8501, ISO 8502 and ISO 8503 have been prepared to provide methods of
assessing these factors, while ISO 8504 provide guidance on the preparation methods that are available for
cleaning steel substrates, indicating the capabilities of each in attaining specified levels of cleanliness.
These International Standards do not contain recommendations for the protective coating system to be
applied to the steel surface. Neither do they contain recommendations for the surface quality requirements
for specific situations even though surface quality can have a direct influence on the choice of protective
coating to be applied and on its performance. Such recommendations are given in other documents such
as national standards and codes of practice. Users of these International Standards should ensure that the
qualities specified are:
— compatible and appropriate both for the environmental conditions to which the steel will be exposed
and for the protective coating system to be used;
— within the capability of the cleaning procedure specified.
The four International Standards referred to above deal with the following aspects of preparation of steel
substrates:
— ISO 8501, Visual assessment of surface cleanliness;
— ISO 8502, Tests for the assessment of surface cleanliness;
— ISO 8503, Surface roughness characteristics of blast-cleaned steel substrates;
— ISO 8504, Surface preparation methods.
Each of these International Standards is in turn divided into separate parts.
Imperfections at welds, edges and other areas of steel substrates are generally starting points for corrosion.
Such areas are also difficult to protect by application of paints and related products. To assist in achieving
efficient corrosion protection, this part of ISO 8501 defines certain imperfections and preparation grades
for such areas.
Steel imperfections may be generated in the manufacturing process or during handling, shipping, building
and erection of a steel structure and could affect the durability of a protective coating system if they are not
remedied.
The required preparation grade (P1-P3) for a specific steel structure should be based on the required
longevity of the coating system and the corrosivity of the environment that the coated steel structure will
be exposed to.
v
ISO/DIS 8501-3:2024(en)
Ensure that the specified surface preparation grade is compatible with other steel structures requirements,
e.g. those specified in:
— 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 5817:2023, Welding – Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding
excluded) — Quality levels for imperfections;
— EN 10025, Hot rolled products of structural steels;
— EN 10225, Weldable structural steels for fixed offshore structures - Technical delivery conditions;
— EN 10163 series Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sec
...