FprEN ISO 15236-3

SLOVENSKI STANDARD
oSIST prEN ISO 15236-3:2025
01-marec-2025
Naprave za kontinuirni transport - Trakovi tračnih transporterjev z jeklenim
vložkom - 3. del: Posebne varnostne zahteve za trakove v podzemnih inštalacijah
(ISO/DIS 15236-3:2025)
Steel cord conveyor belts - Part 3: Special safety requirements for belts for use in
underground installations (ISO/DIS 15236-3:2025)
Stahlseil-Fördergurte - Teil 3: Besondere Sicherheitsanforderungen für den Einsatz
untertage (ISO/DIS 15236-3:2025)
Courroies transporteuses à câbles d'acier Partie 3: Exigences de sécurité particulières
aux courroies utilisées dans des installations souterraines (ISO/DIS 15236-3:2025)
Ta slovenski standard je istoveten z: prEN ISO 15236-3
ICS:
53.040.20 Deli za transporterje Components for conveyors
oSIST prEN ISO 15236-3:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 15236-3:2025
oSIST prEN ISO 15236-3:2025
DRAFT
International
Standard
ISO/DIS 15236-3
ISO/TC 41/SC 3
Steel cord conveyor belts —
Secretariat: SAC
Part 3:
Voting begins on:
Special safety requirements for 2025-01-13
belts for use in underground
Voting terminates on:
2025-04-07
installations
Courroies transporteuses à câbles d'acier —
Partie 3: Exigences de sécurité particulières aux courroies
utilisées dans des installations souterraines
ICS: 53.040.20
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.
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NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
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NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 15236-3:2025(en)
oSIST prEN ISO 15236-3:2025
DRAFT
ISO/DIS 15236-3:2025(en)
International
Standard
ISO/DIS 15236-3
ISO/TC 41/SC 3
Steel cord conveyor belts —
Secretariat: SAC
Part 3:
Voting begins on:
Special safety requirements for
belts for use in underground
Voting terminates on:
installations
Courroies transporteuses à câbles d'acier —
Partie 3: Exigences de sécurité particulières aux courroies
utilisées dans des installations souterraines
ICS: 53.040.20
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 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
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 15236-3:2025(en)
ii
oSIST prEN ISO 15236-3:2025
ISO/DIS 15236-3:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and units. 2
5 Belt design . 3
5.1 Standard type .3
5.2 Conveyor belting having transverse reinforcements.3
5.3 Belt core .4
6 Design and construction . 4
6.1 Belt strengths .4
6.2 Belt width .5
6.3 Belt edge and supporting belt width . .5
6.3.1 Edge width .5
6.3.2 Supporting belt width .5
6.4 Number of cords .5
6.5 Cord pitch .5
6.6 Thickness of covers .6
6.7 Belt thickness .6
6.8 Belt length .6
7 Mechanical requirements . 6
7.1 Breaking strength of the steel cord .6
7.2 Position of the steel cord in the conveyor belt .7
7.2.1 General .7
7.2.2 Horizontal position .7
7.2.3 Vertical position .7
7.3 Number and spacing of cord joints .7
7.4 Cord pull-out force .7
7.5 Covers — Quality classification .8
7.6 Adhesion .8
7.7 Transverse reinforcements .8
7.7.1 Breaker . . .8
7.7.2 Weft .9
7.8 Troughability . .9
7.9 Tracking .10
7.10 Safety requirements .10
8 Sampling . 10
9 Designation .10
10 Ordering data .11
11 Marking . .11
Annex A (informative) Helpful information to be supplied by the purchaser .12
Bibliography . 14

iii
oSIST prEN ISO 15236-3:2025
ISO/DIS 15236-3:2025(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).
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 41 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 third edition cancels and replaces the second edition (ISO 15236-3:2017), which has been technically
revised.
The main changes are as follows:
— 6.1 Remove Table 2 “The selection of preferred belt types” , renumber all tables;
— 7.5 Remove column of Grade V from the original Table 6, which has now been renumbered as Table 5.;
A list of all parts in the ISO 15236 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
oSIST prEN ISO 15236-3:2025
DRAFT International Standard ISO/DIS 15236-3:2025(en)
Steel cord conveyor belts —
Part 3:
Special safety requirements for belts for use in underground
installations
1 Scope
This document specifies the performance and constructional requirements applicable to conveyor belts for
underground mining having steel cords in the longitudinal direction as reinforcement. The requirements for
design and construction apply to the design of single belts, as well as the design of complete type series such
as those covered in ISO 15236-2.
Steel cord belts in accordance with this document are intended for use underground, in coal mines and in
other applications where fire and explosion hazards exist.
NOTE At present, the requirements can only be met by the use of compounds based on chloroprene rubber for the
covers, as well as for the bonding rubber.
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 indicated applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 703, Conveyor belts — Transverse flexibility (troughability) — Test method
ISO 2062, Textiles — Yarns from packages — Determination of single-end breaking force and elongation at
break using constant rate of extension (CRE) tester
ISO 4649, Rubber, vulcanized or thermoplastic — Determination of abrasion resistance using a rotating
cylindrical drum device
ISO 7590, Steel cord conveyor belts — Methods for the determination of total thickness and cover thickness
ISO 7622-2, Steel cord conveyor belts — Longitudinal traction test — Part 2: Measurement of tensile strength
ISO 7623, Steel cord conveyor belts — Cord-to-coating bond test — Initial test and after thermal treatment
ISO 8094, Steel cord conveyor belts — Adhesion strength test of the cover to the core layer
EN 13827, Steel cord conveyor belts — Determination of the lateral and vertical displacement of steel cords
EN 14973, Conveyor belts for use in underground installations — Electrical and flammability safety requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

oSIST prEN ISO 15236-3:2025
ISO/DIS 15236-3:2025(en)
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
3.1
edge width
b
k
thickness of rubber between the outer cord and the belt edge
Note 1 to entry: See Figure 1.
3.2
Breaker
transverse reinforcement in the conveyor belt, typically of a textile material, inserted both above and below
or either above or below the steel cords at a distance of at least 1 mm
...