ISO 505:2025
(Main)Conveyor belts - Method for the determination of the tear propagation resistance of textile conveyor belts
Conveyor belts - Method for the determination of the tear propagation resistance of textile conveyor belts
This document specifies a method of test for the measurement of the propagation resistance of an initial tear in textile conveyor belts, either in full thickness or of the carcass only. This document is applicable to textile belts in installations where there is a risk of longitudinal tearing.
Courroies transporteuses — Méthode de détermination de la résistance à la propagation d'une déchirure dans les courroies transporteuses à carcasse textile
This document specifies a method of test for the measurement of the propagation resistance of an initial tear in textile conveyor belts, either in full thickness or of the carcass only. This document is applicable to textile belts in installations where there is a risk of longitudinal tearing.
General Information
- Status
- Published
- Publication Date
- 31-Mar-2025
- Technical Committee
- ISO/TC 41/SC 3 - Conveyor belts
- Drafting Committee
- ISO/TC 41/SC 3 - Conveyor belts
- Current Stage
- 6060 - International Standard published
- Start Date
- 01-Apr-2025
- Due Date
- 20-Nov-2025
- Completion Date
- 01-Apr-2025
Relations
- Effective Date
- 25-Nov-2023
Overview
ISO 505:2025 - "Conveyor belts - Method for the determination of the tear propagation resistance of textile conveyor belts" defines a standardized laboratory method to measure the tear propagation resistance of textile conveyor belts (full thickness or carcass only). It is intended for belts used in installations at risk of longitudinal tearing and provides repeatable procedures for sampling, specimen preparation, tensile testing and reporting.
Key topics and technical requirements
- Test principle: Tensile testing of a prepared initial tear, measuring the force required to propagate the tear at a controlled speed.
- Apparatus: Dynamometric tensile testing machine sized so measured forces fall within the upper 90% of its capacity, adjustable jaw separation speed to (50 ± 10) mm/min, and a free jaw distance of at least 300 mm. A graphical recorder is required to capture tear force over distance.
- Test pieces (sampling & dimensions):
- Cut from the belt in the longitudinal direction, at least 50 mm from edges.
- Rectangular specimens, nominal 300 mm length and (100 ± 1) mm width (width may be increased to 300 mm if weft threads pull out).
- Test both sense A and sense B (two specimens).
- Covers may be removed by stripping or buffing; special handling when a breaker ply is present.
- Conditioning and atmospheres:
- Specimens prepared at least 16 h after manufacture; minimum conditioning time 8 h (in practice a 72 h period is specified in case of dispute).
- Condition according to ISO 18573 using atmospheres D or E (or B/C for light belts and carcass samples). Test atmosphere must match conditioning and be reported.
- Procedure and results:
- Mount cut ends so inner cut edges are centered in jaws; continue until tear extends at least 100 mm.
- Analyze multi-peak traces per ISO 6133; the median peak force is reported as the mean tear resistance.
- Report results for each specimen and the mean of the two.
Applications and users
ISO 505:2025 is used by:
- Conveyor belt manufacturers for quality control and product development.
- Testing laboratories and third-party certifiers performing mechanical property verification.
- OEMs and end-users (mining, bulk handling, ports, quarrying, cement and aggregate industries) assessing suitability of textile belts where longitudinal tearing is a risk.
- R&D teams validating carcass integrity and cover removal effects on tear propagation resistance.
Practical benefits include consistent test data for material selection, design decisions, failure analysis and contractual specifications.
Related standards
- ISO 18573 - Conveyor belts: Test atmospheres and conditioning periods (referenced for specimen conditioning).
- ISO 6133 - Analysis of multi-peak tear resistance traces.
- ISO 21183-1 - Light conveyor belts - principal characteristics and applications (conditioning guidance for light belts).
ISO 505:2025 - Conveyor belts — Method for the determination of the tear propagation resistance of textile conveyor belts Released:1. 04. 2025
ISO 505:2025 - Courroies transporteuses — Méthode de détermination de la résistance à la propagation d'une déchirure dans les courroies transporteuses à carcasse textile Released:1. 04. 2025
Frequently Asked Questions
ISO 505:2025 is a standard published by the International Organization for Standardization (ISO). Its full title is "Conveyor belts - Method for the determination of the tear propagation resistance of textile conveyor belts". This standard covers: This document specifies a method of test for the measurement of the propagation resistance of an initial tear in textile conveyor belts, either in full thickness or of the carcass only. This document is applicable to textile belts in installations where there is a risk of longitudinal tearing.
This document specifies a method of test for the measurement of the propagation resistance of an initial tear in textile conveyor belts, either in full thickness or of the carcass only. This document is applicable to textile belts in installations where there is a risk of longitudinal tearing.
ISO 505:2025 is classified under the following ICS (International Classification for Standards) categories: 53.040.20 - Components for conveyors. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 505:2025 has the following relationships with other standards: It is inter standard links to ISO 505:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 505:2025 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.
Standards Content (Sample)
International
Standard
ISO 505
Fifth edition
Conveyor belts — Method for
2025-04
the determination of the tear
propagation resistance of textile
conveyor belts
Courroies transporteuses — Méthode de détermination de la
résistance à la propagation d'une déchirure dans les courroies
transporteuses à carcasse textile
Reference number
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
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ISO copyright office
CP 401 • Ch. de Blandonnet 8
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Test pieces . 2
6.1 Method of sampling .2
6.2 Shape and dimensions .2
6.3 Number .2
6.4 Preparation .2
7 Method of test . 3
7.1 Conditioning of test pieces .3
7.2 Test conditions .4
7.3 Procedure .4
7.4 Expression of results . .4
7.5 Test report .5
Bibliography . 6
iii
Foreword
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This document was prepared by Technical Committee ISO/TC41 Pulleys and belts (including veebelts),
Subcommittee SC 3, Conveyor belts, in collaboration with the European Committee for Standardization
(CEN) Technical Committee CEN/TC 188, Conveyor belts, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
This fifth edition cancels and replaces the fourth edition (ISO 505:
...
Norme
internationale
ISO 505
Cinquième édition
Courroies transporteuses —
2025-04
Méthode de détermination de la
résistance à la propagation d'une
déchirure dans les courroies
transporteuses à carcasse textile
Conveyor belts — Method for the determination of the tear
propagation resistance of textile conveyor belts
Numéro de référence
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2025
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, 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, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Principe. 1
5 Appareillage . 1
6 Éprouvettes. 2
6.1 Méthode de prélèvement .2
6.2 Forme et dimensions .2
6.3 Nombre .2
6.4 Préparation .2
7 Méthode d'essai . 4
7.1 Conditionnement des éprouvettes .4
7.2 Conditions d’essais .4
7.3 Mode opératoire .4
7.4 Expression des résultats . .4
7.5 Rapport d’essai .5
Bibliographie . 6
iii
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
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décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
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été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir
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commerce (OTC), voir www.iso.org/avant-propos.
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, en collaboration avec le Comité
technique CEN/TC 188, Courroies transporteuses, du Comité européen de normalisation (CEN), suivant
l'Accord de coopération technique entre l'ISO et le CEN (Accord de Vienne).
Cette cinquième édition annule et remplace la quatrième édition (ISO 505:2017), qui a fait l’objet d’une
révision technique.
Les principales modifications sont les suivantes:
— ajout d'une explication sur la longueur d'échantillon et la longueur de coupe (voir 6.2);
— suppression de l'atmosphère A, en gardant seulement les atmosphères B, C, D et E qui sont spécifiées
dans l'ISO 18573 (voir 7.1);
— révision de la Figure 1, Figure 2, Figure 3 et Figure 4.
Il convient que l’
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