EN ISO 7622-2:2022

Steel cord conveyor belts - Longitudinal traction test - Part 2: Measurement of tensile strength (ISO 7622-2:2022)

This document specifies a method for the determination of the tensile strength, in the longitudinal, of steel cords constituting the carcass of conveyor belts.
It applies exclusively to conveyor belts with a steel carcass.
NOTE      A method for the determination of elongation is specified in ISO 7622‑1.

Stahlseilfördergurte - Zugversuch in Längsrichtung - Teil 2: Messung der Zugfestigkeit (ISO 7622-2:2022)

Dieses Dokument legt ein Verfahren fest, um die Zugfestigkeit eines Stahlseilfördergurtes in Längsrichtung zu bestimmen.
Es wird ausschließlich bei Stahlseilfördergurten angewendet.
ANMERKUNG   Ein Verfahren zur Bestimmung der Dehnung ist in ISO 7622 1 festgelegt.

Courroies transporteuses à câbles d'acier - Essai de traction dans le sens longitudinal - Partie 2: Mesurage de la résistance à la rupture (ISO 7622-2:2022)

Le présent document spécifie une méthode pour la détermination de la résistance à la rupture, dans le sens longitudinal, des câbles d’acier constituant la carcasse d’une courroie transporteuse.
Il s’applique exclusivement aux courroies transporteuses à carcasse en acier.
NOTE         Une méthode pour la détermination de l’allongement est spécifiée dans l’ISO 7622‑1.

Naprave za kontinuirni transport - Trakovi tračnih transporterjev z jeklenim vložkom - Vzdolžni natezni preskus - 2. del: Merjenje natezne trdnosti (ISO 7622-2:2022)

Standard ISO 7622-2:2015 določa metodo za določanje natezne trdnosti po vzdolžni osi jeklenih vložkov, ki sestavljajo trup trakov tračnih transporterjev.
Uporablja se izključno za trakove tračnih transporterjev z jeklenim trupom.
OPOMBA: Metoda za določanje raztezka je določena v standardu ISO 7622-1.

General Information

• Status: Published
• Publication Date: 05-Jul-2022
• Withdrawal Date: 30-Jan-2023
• ICS: 53.040.20 - Components for conveyors
• Technical Committee: CEN/TC 188 - Conveyor belts
• Drafting Committee: CEN/TC 188 - Conveyor belts
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 06-Jul-2022
• Completion Date: 06-Jul-2022
• Ref Project: SIST EN ISO 7622-2:2022 - Steel cord conveyor belts - Longitudinal traction test - Part 2: Measurement of tensile strength (ISO 7622-2:2022)

Relations

• Replaces: EN ISO 7622-2:2015 - Steel cord conveyor belts - Longitudinal traction test - Part 2: Measurement of tensile strength (ISO 7622-2:2015)
• Effective Date: 15-Dec-2021

Overview - EN ISO 7622-2:2022 (Steel cord conveyor belts)

EN ISO 7622-2:2022 specifies a standardized, destructive method to measure the tensile strength in the longitudinal direction of steel cords that form the carcass of conveyor belts. It applies exclusively to conveyor belts with a steel carcass and is intended primarily for verification (for example in litigation or when a cord manufacturer’s certificate is not available). The document is the European adoption of ISO 7622-2:2022 and supersedes the 2015 edition.

Key topics and technical requirements

• Scope: Determination of longitudinal tensile strength of steel cords in conveyor belt carcasses.
• Test principle: Prepare specimens so only one warp cord is stressed and break the specimen in a dynamometric tensile testing machine.
• Apparatus requirements
  • Machine capacity such that the maximum test load is 15% to 85% of machine capacity.
  • Jaw separation rate set to (100 ± 10) mm/min and maintained constant.
  • Minimum jaw separation ≥ 250 mm.
  • Jaws designed to prevent slippage; cross-ribbed jaws with at least 80 mm ribbed length are recommended.
• Test specimens
  • Cut three specimens parallel to belt axis, at least 50 mm from edge; width containing five warp cords.
  • Length depends on cord diameter (examples): 500 mm for Ø0–3.9 mm, 700 mm for Ø4.0–5.9 mm, up to 1 500 mm for Ø13.1–15.0 mm.
  • Three specimen types (A, B, C) with defined preparation (removal of covers/weft or cutting adjacent cords to isolate the central cord).
• Conditioning: Follow ISO 18573 (use atmosphere A or B) and test immediately after conditioning.
• Procedure and results
  • Grip specimen ends (≈100 mm each) in jaws, ensure correct alignment, run test at required rate, record breaking force.
  • Tensile strength R (N/mm) is calculated as R = (F × C) / b, where F is the mean breaking force of three specimens, C the number of warp cords in the belt, and b the belt nominal width (mm).
  • The reported value is the maximum theoretical tensile strength; an effective tensile strength requires corrective factors (not detailed in this part).

Applications and who uses it

• Primary users: belt manufacturers, testing laboratories, quality assurance teams, procurement engineers, legal experts in transport/conveying disputes, and maintenance departments responsible for conveyor systems.
• Practical uses
  • Verifying compliance of steel-cord belts to contractual or forensic requirements.
  • Quality control on incoming or installed belts when manufacturer certificates are unavailable or disputed.
  • Supporting failure analysis and litigation where destructive proof of cord strength is required.

Related standards

• ISO 7622‑1 - method for determination of elongation (related part of the series).
• ISO 18573 - conveyor belts - test atmospheres and conditioning periods (normative reference used for specimen conditioning).

Keywords: EN ISO 7622-2:2022, steel cord conveyor belts, longitudinal traction test, tensile strength measurement, conveyor belt testing, test specimens, ISO 18573.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2022
Nadomešča:
SIST EN ISO 7622-2:2016
Naprave za kontinuirni transport - Trakovi tračnih transporterjev z jeklenim
vložkom - Vzdolžni natezni preskus - 2. del: Merjenje natezne trdnosti (ISO 7622-
2:2022)
Steel cord conveyor belts - Longitudinal traction test - Part 2: Measurement of tensile
strength (ISO 7622-2:2022)
Stahlseilfördergurte - Zugversuch in Längsrichtung - Teil 2: Messung der Zugfestigkeit
(ISO 7622-2:2022)
Courroies transporteuses à câbles d'acier - Essai de traction dans le sens longitudinal -
Partie 2: Mesurage de la résistance à la rupture (ISO 7622-2:2022)
Ta slovenski standard je istoveten z: EN ISO 7622-2:2022
ICS:
53.040.20 Deli za transporterje Components for conveyors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 7622-2
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2022
EUROPÄISCHE NORM
ICS 53.040.20 Supersedes EN ISO 7622-2:2015
English Version
Steel cord conveyor belts - Longitudinal traction test - Part
2: Measurement of tensile strength (ISO 7622-2:2022)
Courroies transporteuses à câbles d'acier - Essai de Stahlseilfördergurte - Zugversuch in Längsrichtung -
traction dans le sens longitudinal - Partie 2: Mesurage Teil 2: Messung der Zugfestigkeit (ISO 7622-2:2022)
de la résistance à la rupture (ISO 7622-2:2022)
This European Standard was approved by CEN on 14 June 2022.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7622-2:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 7622-2:2022) has been prepared by Technical Committee ISO/TC 41 "Pulleys
and belts (including veebelts)" in collaboration with Technical Committee CEN/TC 188 “Conveyor belts”
the secretariat of which is held by SNV.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by January 2023, and conflicting national standards shall
be withdrawn at the latest by January 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 7622-2:2015.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 7622-2:2022 has been approved by CEN as EN ISO 7622-2:2022 without any
modification.
INTERNATIONAL ISO
STANDARD 7622-2
Third edition
2022-06
Steel cord conveyor belts —
Longitudinal traction test —
Part 2:
Measurement of tensile strength
Courroies transporteuses à câbles d'acier — Essai de traction dans le
sens longitudinal —
Partie 2: Mesurage de la résistance à la rupture
Reference number
ISO 7622-2:2022(E)
ISO 7622-2:2022(E)
© ISO 2022
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
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 7622-2:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Test specimens . 2
6.1 General . 2
6.2 Test specimen, type A . 3
6.3 Test specimen, type B . 3
6.4 Test specimen, type C . 4
7 Conditioning of test specimens . 4
8 Procedure .4
9 Expression of results . 5
10 Test report . 5
Bibliography . 6
iii
ISO 7622-2:2022(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies).
...