prEN ISO 11124-1

Preparation of steel substrates before application of paints and related products - Specifications for metallic blast-cleaning abrasives - Part 1: General introduction and classification (ISO/DIS 11124-1:2025)

This document describes a classification of metallic blast-cleaning abrasives for the preparation of steel substrates before application of paints and related products.
It specifies the characteristics which are required for the complete designation of such abrasives.
This document applies to abrasives supplied in the "new" or unused condition only. It does not apply to abrasives either during or after use.
NOTE Although this document has been developed specifically to meet requirements for preparation of steelwork, the properties specified will generally be appropriate for use when preparing other material surfaces, or components, using blast-cleaning techniques. These techniques are described in ISO 8504‑2.

Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen - Anforderungen an metallische Strahlmittel - Teil 1: Allgemeine Einleitung und Einteilung (ISO/DIS 11124‑1:2025)

Préparation des subjectiles d'acier avant application de peintures et de produits assimilés - Spécifications pour abrasifs métalliques destinés à la préparation par projection - Partie 1: Introduction générale et classification (ISO/DIS 11124-1:2025)

Le présent document introduit une classification des abrasifs métalliques destinés à la préparation de subjectiles d'acier par projection, avant application de peintures et de produits assimilés.
Il spécifie les caractéristiques requises pour la désignation complète de ces abrasifs.
Le présent document s'applique seulement aux abrasifs fournis à l'état « neuf » ou non utilisé. Il ne s'applique pas aux abrasifs pendant ou après utilisation.
NOTE Bien que le présent document ait été spécialement établi pour satisfaire aux exigences de préparation des ouvrages en acier, les propriétés spécifiées seront généralement appropriées pour l'emploi en préparation de subjectiles ou éléments d'autres matériaux, par les techniques de décapage par projection. Ces techniques sont décrites dans l'ISO 8504‑2.

Priprava jeklenih podlag pred nanašanjem barv in sorodnih premazov - Specifikacije za kovinske granulate za peskanje - 1. del: Splošni uvod in razvrstitev (ISO/DIS 11124-1:2025)

General Information

• Status: Not Published
• Publication Date: 02-May-2027
• ICS: 25.220.10 - Surface preparation
• Technical Committee: CEN/TC 139 - Paints and varnishes
• Drafting Committee: CEN/TC 139 - Paints and varnishes
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 30-Dec-2025
• Completion Date: 30-Dec-2025
• Ref Project: oSIST prEN ISO 11124-1:2025 - Preparation of steel substrates before application of paints and related products - Specifications for metallic blast-cleaning abrasives - Part 1: General introduction and classification (ISO/DIS 11124-1:2025)

Relations

• Revises: EN ISO 11124-1:2018 - Preparation of steel substrates before application of paints and related products - Specifications for metallic blast-cleaning abrasives - Part 1: General introduction and classification (ISO 11124-1:2018)
• Effective Date: 05-Feb-2025

Overview

The prEN ISO 11124-1:2025 standard, titled Preparation of steel substrates before application of paints and related products - Specifications for metallic blast-cleaning abrasives - Part 1: General introduction and classification, is developed by CEN to provide a comprehensive classification system for metallic blast-cleaning abrasives. These abrasives are primarily used for surface preparation of steel substrates prior to painting or coating.

This standard focuses on the characteristics necessary for a complete and precise designation of abrasives in their new, unused condition. It addresses the categorization by material, particle shape, and size to ensure optimal surface preparation. While tailored for steel substrates, the classification and specifications are also applicable to other materials prepared with blast-cleaning techniques, in line with ISO 8504-2 standards.

Key Topics

• Abrasive Classification
  The standard defines metallic abrasives by type (e.g., chilled iron, cast steel, stainless steel), origin, and manufacture. Each abrasive type is assigned an abbreviated code for identification.

• Particle Shape
  Initial particle shapes are classified into four categories:

  • Shot (round) - symbol S
  • Grit (angular) - symbol G
  • Cylindrical (sharp-edged) - symbol C
  • Irregular (non-uniform) - symbol I

• Particle Size Range
  Abrasives consist of mixtures with varying particle sizes. Size grades are indicated by a three-digit code representing nominal particle size in hundredths of a millimeter (e.g., 100 represents 1.00 mm).

• Full Designation System
  Abrasives are fully designated using the format:
  Abrasive ISO 11124 [Type Abbreviation]/[Shape Symbol][Size Grade]
  Optional hardness ranges (Vickers hardness values) may be added to specify abrasive hardness.

• Packaging and Traceability
  The standard mandates clear labeling of all abrasives with full product codes on packaging units. Traceability marking by production lot or period is strongly recommended.

• Safety Note
  It highlights that equipment and abrasives can pose hazards during use, emphasizing the importance of user instructions and precautions.

Applications

prEN ISO 11124-1:2025 is vital for industries involved in the surface preparation of steel and other metallic substrates before applying paints, coatings, or related protective products. Typical applications include:

• Industrial Coating and Painting
  Optimal surface profile creation ensures strong adhesion and longevity of protective coatings on steel structures such as bridges, ships, and pipelines.

• Blasting Process Control
  Selection of appropriate metallic abrasives based on material, shape, and size enhances cleaning efficiency while achieving desired surface roughness.

• Quality Assurance and Specification Compliance
  Full abrasive designation allows procurement accuracy and traceability, facilitating quality control and regulatory compliance in construction and manufacturing sectors.

• Maintenance and Repair
  Standardized abrasives support consistent surface preparation during refurbishment of painted steel surfaces in infrastructure and industrial plants.

Related Standards

• ISO 8504-2
  Describes blast-cleaning techniques applicable to steel and other material surfaces.

• ISO 11124 Series
  Specifies requirements for various metallic blast-cleaning abrasives, including:

  • Part 2: Chilled-iron grit
  • Part 3: High-carbon cast-steel shot and grit

• ISO 11125 Series
  Defines test methods for metallic blast-cleaning abrasives.

• ISO 11126 Series
  Outlines requirements for non-metallic abrasives used in blast-cleaning.

• ISO 11127 Series
  Contains test methods for non-metallic abrasives.

• ISO 8503-2
  Provides methods for assessing surface roughness of prepared surfaces.

SEO Keywords

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• paint coating surface prep standards

By adhering to prEN ISO 11124-1:2025, organizations ensure standardized, effective, and safe preparation of steel surfaces, enhancing coating durability and quality assurance in industrial processes worldwide.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2025
Priprava jeklenih podlag pred nanašanjem barv in sorodnih premazov -
Specifikacije za kovinske granulate za peskanje - 1. del: Splošni uvod in
razvrstitev (ISO/DIS 11124-1:2025)
Preparation of steel substrates before application of paints and related products -
Specifications for metallic blast-cleaning abrasives - Part 1: General introduction and
classification (ISO/DIS 11124-1:2025)
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen -
Anforderungen an metallische Strahlmittel - Teil 1: Allgemeine Einleitung und Einteilung
(ISO/DIS 11124-1:2025)
Préparation des subjectiles d'acier avant application de peintures et de produits
assimilés - Spécifications pour abrasifs métalliques destinés à la préparation par
projection - Partie 1: Introduction générale et classification (ISO/DIS 11124-1:2025)
Ta slovenski standard je istoveten z: prEN ISO 11124-1
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 11124-1
ISO/TC 35/SC 12
Preparation of steel substrates
Secretariat: BSI
before application of paints and
Voting begins on:
related products — Specifications
2025-10-07
for metallic blast-cleaning
Voting terminates on:
abrasives —
2025-12-30
Part 1:
General introduction and
classification
Préparation des subjectiles d'acier avant application de
peintures et de produits assimilés — Spécifications pour abrasifs
métalliques destinés à la préparation par projection —
Partie 1: Introduction générale et classification
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 has not been edited by the ISO Central 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 11124-1:2025(en)
DRAFT
ISO/DIS 11124-1:2025(en)
International
Standard
ISO/DIS 11124-1
ISO/TC 35/SC 12
Preparation of steel substrates
Secretariat: BSI
before application of paints and
Voting begins on:
related products — Specifications
for metallic blast-cleaning
Voting terminates on:
abrasives —
Part 1:
General introduction and
classification
Préparation des subjectiles d'acier avant application de
peintures et de produits assimilés — Spécifications pour abrasifs
métalliques destinés à la préparation par projection —
Partie 1: Introduction générale et classification
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 has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
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 11124-1:2025(en)
ii
ISO/DIS 11124-1:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
4.1 Abrasive type .2
4.2 Initial particle shape .2
4.3 Particle size range .3
5 Designation of abrasives . 3
6 Package identification and lot traceability . 3
Annex A (informative) International Standards for metallic and non-metallic blast-cleaning
abrasives . 4
Bibliography . 6

iii
ISO/DIS 11124-1:2025(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).
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 12,
Preparation of steel substrates before application of paints and related products.
This third edition cancels and replaces the second edition (ISO 11124-1:2018), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Definition (3.6) added.
— Table 1, Table 2 and Annex A have been technically revised.
A list of all parts in the ISO 11124 series can be found on the ISO website.

iv
ISO/DIS 11124-1:2025(en)
Introduction
This document is one of a number of parts of ISO 11124 specifying requirements for metallic abrasives for
blast-cleaning.
Test methods for metallic blast-cleaning abrasives are given in the various parts of ISO 11125 (see Annex A).
The requirements for non-metallic abrasives commonly used for blast-cleaning are specified in the various
parts of ISO 11126. Test methods to be used to define these requirements are contained in the various parts
of ISO 11127 (see Annex A).
Abrasive blast-cleaning techniques are widely used to clean and prepare surfaces. During work on
development of a series of International Standards dealing with the preparati
...