NF EN ISO 21904-3

NF EN ISO 21904-3

May 2018
Standard Current

Health and safety in welding and allied processes - Requirements, testing and marking of equipment for air filtration - Part 3 : determination of the capture efficiency of on-torch welding fume extraction devices

ISO 21904-3:2018 defines a laboratory method for measuring the welding fume capture efficiency of on-torch extraction systems. The procedure only prescribes a methodology, leaving selection of the test parameters to the user, so that the effect of different variables can be evaluated.ISO 21904-3:2018 is applicable to integrated on-torch systems and to systems where a discrete extraction system is attached to the welding torch close to the arc area. The methodology is suitable for use with all continuous wire welding processes, all material types and all welding parameters.The method can be used to evaluate the effects of variables such as extraction flow rate, extract nozzle position, shielding gas flow rate, welding geometry, welding torch angle, fume emission rate, etc., on capture efficiency.

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Main informations

Collections

National standards and national normative documents

Thematics

QSE, Sécurité, Gestion des risques et SST

Publication date

May 2018

Number of pages

31 p.

Reference

NF EN ISO 21904-3

ICS Codes

13.100   Occupational safety. Industrial hygiene
25.160.01   Welding, brazing and soldering in general

Classification index

A88-201-3

Print number

1

International kinship

ISO 21904-3:2018

European kinship

EN ISO 21904-3:2018
Sumary
Health and safety in welding and allied processes - Requirements, testing and marking of equipment for air filtration - Part 3 : determination of the capture efficiency of on-torch welding fume extraction devices

ISO 21904-3:2018 defines a laboratory method for measuring the welding fume capture efficiency of on-torch extraction systems. The procedure only prescribes a methodology, leaving selection of the test parameters to the user, so that the effect of different variables can be evaluated.

ISO 21904-3:2018 is applicable to integrated on-torch systems and to systems where a discrete extraction system is attached to the welding torch close to the arc area. The methodology is suitable for use with all continuous wire welding processes, all material types and all welding parameters.

The method can be used to evaluate the effects of variables such as extraction flow rate, extract nozzle position, shielding gas flow rate, welding geometry, welding torch angle, fume emission rate, etc., on capture efficiency.

Table of contents
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Principe
  • 5 Matériel et matériaux d'essai
  • 6 Mode opératoire d'essai
  • 7 Paramètres d'essai pour générer des données d'efficacité de captage
  • 8 Rapport d'essai
  • Annexe A Notes relatives au matériel
  • Annexe B Essais préliminaires
  • Annexe C Exemples de chambres d'essai
  • Annexe D Modes opératoires d'essai
  • Annexe E Traitement des données pour la méthode d'essai
    3
  • Annexe F Formulaire à compléter pour les paramètres d'essai
  • Annexe G Informations sur la nécessité de mesurer les fuites
  • Bibliographie
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