ISO 433:2017

Conveyor belts - Marking

ISO 433:2017 specifies the marking of conveyor belts, i.e. - the indications to be marked; - the dimensions of the marks; - the position of the marks. ISO 433:2017 does not apply to light conveyor belts as described in ISO 21183‑1.

Courroies transporteuses — Marquage

L'ISO 433 :2017 spécifie le marquage des courroies transporteuses, c'est-à-dire - les indications à marquer; - les dimensions des marques; - l'emplacement des marques. L'ISO 433 :2017 ne s'applique aux courroies transporteuses légères telles que décrites dans l'ISO 21183‑1.

Naprave za kontinuirni transport - Trakovi tračnih transporterjev - Oznake trakov

General Information

• Status: Published
• Publication Date: 24-Oct-2017
• ICS: 53.040.20 - Components for conveyors
• Technical Committee: ISO/TC 41/SC 3 - Conveyor belts
• Drafting Committee: ISO/TC 41/SC 3 - Conveyor belts
• Current Stage: 9093 - International Standard confirmed
• Start Date: 10-May-2023
• Completion Date: 13-Dec-2025
• Ref Project: SIST ISO 433:2020 - Conveyor belts - Marking

Relations

• Revises: ISO 433:1991 - Conveyor belts - Marking
• Effective Date: 01-Apr-2017
• Revises: ISO 433:1991/Amd 1:2006 - Conveyor belts - Marking - Amendment 1
• Effective Date: 01-Apr-2017

Overview

ISO 433:2017 is an international standard that defines the marking requirements for conveyor belts. It specifies the essential indications to be marked on belts, the dimensions of these marks, and their exact positioning. This standard ensures uniformity and clarity in conveyor belt identification worldwide, facilitating better safety, quality assurance, and traceability.

Importantly, ISO 433:2017 applies to most conveyor belts but excludes light conveyor belts as described in ISO 21183-1. This distinction focuses the scope on belts used in heavy-duty and industrial applications.

Key Topics

• Indications to be marked:
  The standard requires certain critical information be displayed, including breaking strength measured in newtons per millimeter according to ISO 283, specific property codes such as flame resistance and electrical conductivity, the year of manufacture, manufacturer identification along with country code, and optional supplementary details like heat resistance or serial numbers.

• Mark dimensions:
  The height of marks ranges from 20 mm to 80 mm. Impression depth varies by cover thickness-up to 1.5 mm for thicker belts or no more than 50% of cover thickness for thinner covers.

• Mark position:
  Marks typically appear on the top cover of the conveyor belt, but in special cases, they may be placed on the bottom cover. Positioning varies based on belt type:

  • Full-width belts are marked near the edges (50 mm to 100 mm from either side), with a maximum spacing of 25 meters between marks.
  • Slab belts are marked transversely across the width, spaced up to 15 meters apart, with repeated marks across the width to ensure visibility on narrower strips cut from slabs.

• Optional marking locations:
  Markings using paint can be applied to side plates of rolls and mandrels for additional traceability.

Applications

The practical use of ISO 433:2017 primarily supports:

• Conveyor belt manufacturers ensuring consistent, legible, and standardized product markings for global distribution.
• Industrial operators and maintenance teams using markings to identify belt specifications such as strength and flame resistance quickly, improving maintenance decisions and enhancing safety protocols.
• Quality control and compliance auditors verifying that belts meet required standards through traceable marks.
• Custom belt fabricators and suppliers coordinating with clients on marking specifications, including additional custom identifiers like heat resistance codes or serial numbers.

By adhering to this standard, industries such as mining, logistics, manufacturing, and construction benefit from improved operational efficiency and risk management related to conveyor belt inspection and replacement.

Related Standards

ISO 433:2017 is linked closely to these complementary ISO documents:

• ISO 283 - Test methods for tensile strength and elongation of textile conveyor belts.
• ISO 284 - Electrical conductivity and static electricity specifications for conveyor belts.
• ISO 340 - Flammability requirements for conveyor belts.
• ISO 4195 - Heat resistance testing for conveyor belt covers.
• ISO 10247 - Classification of cover characteristics and wear resistance.
• ISO 21183-1 - Defines light conveyor belts, which ISO 433:2017 excludes.

These related standards create a comprehensive framework for conveyor belt characteristics, testing, and safety that complement the marking requirements set out in ISO 433:2017.

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Keywords: ISO 433:2017, conveyor belts marking, conveyor belt standards, belt breaking strength, conveyor belt identification, conveyor belt markings, industrial conveyor belts, conveyor belt traceability, conveyor belt safety markings, ISO conveyor belt standards

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 433
Third edition
2017-10
Conveyor belts — Marking
Courroies transporteuses — Marquage
Reference number
©
ISO 2017
© 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. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2017 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Indications to be marked . 2
5 Dimensions and position of marks . 2
5.1 Dimensions of marks . 2
5.2 Position of marks . 2
5.2.1 Marking of full-width belts . 3
5.2.2 Marking of slab belts . 3
5.2.3 Marking on side plates of roll . 3
5.2.4 Marking on mandrel . 3
6 Example of marking . 3
Bibliography . 6
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 ISO/TC 41, Pulleys and belts (including veebelts), Subcommittee SC 3,
Conveyor belts.
This third edition cancels and replaces the second edition (ISO 433:1991, and ISO 433:1991/Amd.
1:2006), which has been technically revised.
The main changes compared to the previous edition are as follows:
— the Normative references have been updated;
— a Bibliography has been added.
iv © I
...

SLOVENSKI STANDARD
01-oktober-2020
Naprave za kontinuirni transport - Trakovi tračnih transporterjev - Oznake trakov
Conveyor belts - Marking
Courroies transporteuses - Marquage
Ta slovenski standard je istoveten z: ISO 433:2017
ICS:
53.040.20 Deli za transporterje Components for conveyors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 433
Third edition
2017-10
Conveyor belts — Marking
Courroies transporteuses — Marquage
Reference number
©
ISO 2017
© 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. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2017 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Indications to be marked . 2
5 Dimensions and position of marks . 2
5.1 Dimensions of marks . 2
5.2 Position of marks . 2
5.2.1 Marking of full-width belts . 3
5.2.2 Marking of slab belts . 3
5.2.3 Marking on side plates of roll . 3
5.2.4 Marking on mandrel . 3
6 Example of marking . 3
Bibliography . 6
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 ISO/TC 41, Pulleys and belts (includin
...

NORME ISO
INTERNATIONALE 433
Troisième édition
2017-10
Courroies transporteuses — Marquage
Conveyor belts — Marking
Numéro de référence
©
ISO 2017
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2017, Publié en Suisse
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni utilisée
sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie, l’affichage sur
l’internet ou sur un Intranet, sans autorisation écrite préalable. Les demandes d’autorisation peuvent être adressées à l’ISO à
l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2017 – Tous droits réservés

Sommaire Page
Avant-propos .iv
1 Domaine d'application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Indications à marquer . 2
5 Dimensions et emplacement du marquage . 2
5.1 Dimensions du marquage . 2
5.2 Emplacement du marquage . 2
5.2.1 Marquage sur courroies en pleine largeur . 2
5.2.2 Marquage sur nappe de courroies . 3
5.2.3 Marquage sur les flasques de la bobine . 3
5.2.4 Marquage sur mandrin . 3
6 Exemple de marquage . 3
Bibliographie . 6
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes
nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est
en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.
L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document a été
rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir www.
iso.org/directives).
L'attention est appelée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
l'élaboration du document sont indiqués dans l'Introduction et/ou dans la liste des déclarations de
brevets reçues par l'ISO (voir www.iso.org/brevets).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion
de l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir le lien suivant: www.iso.org/iso/fr/avant-propos.html.
Le présent document a été élaboré par le comité technique ISO/TC 41, Poulies et courroies (y compris les
courroies trapézoïdales), sous-comité SC 3, Courroies transporteuses.
Cette troisième édition annule et remplace la deuxième édition (ISO 433:1991, et
ISO 433:1991/Amd.1:2006), qui a fait l’objet d’une révision technique.
Les principales modifications par rapport à la précédente édition sont les suivantes:
— les références normatives ont été mises à jour;
— une Bibliographie a été ajoutée.
iv © ISO 2017 – Tous droits réservés

NORME INTERNATIONALE ISO 433:2017(F)
Courroies transporteuses — Marquage
1 Domaine d'application
Le présent document spécifie le marquage des courroies transporte
...