EN ISO 22721:2023 PDF

Overview

EN ISO 22721:2023 - Conveyor belts is the CEN-adopted version of ISO 22721:2023 that specifies requirements for rubber- or plastics-covered conveyor belts of textile construction intended for use in underground mining. It applies to belting designed to run on flat or troughed idlers and replaces EN ISO 22721:2007. The standard does not apply to light conveyor belts (see ISO 21183-1) and it excludes prescriptive requirements for plastics covers - those are to be agreed between manufacturer and purchaser.

Key topics and technical requirements

EN ISO 22721:2023 covers essential technical aspects for safe, reliable underground conveyor belting, including:

• Belt construction (textile carcass, ply arrangements, mono/duo/solid woven formats)
• Length and width specifications and related tolerances
• Rubber cover requirements and cover thickness tolerances
• Total belt thickness tolerances and measurement methods
• Transverse and longitudinal fabric joints (spacing, number, location rules)
• Elongation, full-thickness tensile strength, and adhesion test considerations
• Troughability (transverse flexibility) for running on idlers
• Sampling and test-method references for quality control
• Designation and marking requirements for traceability and procurement
• Annexes:
  • Annex A: recommended items to agree upon between purchaser and manufacturer
  • Annex B: information purchasers should supply with enquiries
  • Annex C: recommendations for lateral drift (straight running) - acknowledged as assessable only after installation

Referenced normative documents include ISO test methods for tensile strength, adhesion, sampling, abrasion, troughability and more.

Practical applications and who uses it

This standard is intended for:

• Conveyor belt manufacturers designing and specifying rubber- or plastics-covered textile belts for underground mines
• Mine engineers, maintenance teams and procurement specialists who specify, buy and inspect belting
• OEMs of conveyor systems and integrators responsible for belt selection and installation
• Testing laboratories performing conformity and acceptance testing per ISO methods

Use EN ISO 22721:2023 to ensure belts meet expected mechanical, dimensional and durability characteristics for underground haulage, and to standardize procurement and contract terms between buyers and suppliers.

Related standards

• ISO 21183-1 - light conveyor belts (excluded)
• EN 14973 - underground installations - electrical and flammability safety requirements
• Various ISO test standards cited in EN ISO 22721 (e.g., ISO 283, ISO 252, ISO 703, ISO 583)

Keywords: EN ISO 22721:2023, conveyor belts, underground mining, textile construction, rubber-covered, plastics-covered, troughability, tensile strength, adhesion, lateral drift, belt specification.