SIST EN ISO 7622-2:2022 PDF

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

Название (английский):

SIST EN ISO 7622-2:2022

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

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 31 августа 2022 г.
Издание:: ISO 7622-2:2022
ICS:: 53.040.20

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Описание (английский):

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.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

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.

SIST EN ISO 7622-2:2022 PDF

Abstract

Похожие стандарты

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

Key topics and technical requirements

Applications and who uses it

Related standards

Технические детали

ISO 7622-2:2022

Steel cord conveyor belts — Longitudinal traction test — Part 2: Measurement of tensile strength

BS ISO 18573:2024

Conveyor belts. Test atmospheres and conditioning periods.

SIST EN ISO 7622-1:2013

Steel cord conveyor belts - Longitudinal traction test - Part 1: Measurement of elongation (ISO 7622-1:2013)