EN ISO 21904-1:2020
(Main)Health and safety in welding and allied processes - Equipment for capture and separation of welding fume - Part 1: General requirements (ISO 21904-1:2020)
Health and safety in welding and allied processes - Equipment for capture and separation of welding fume - Part 1: General requirements (ISO 21904-1:2020)
This document defines the general requirements for ventilation equipment used to capture and separate fumes generated by welding and allied processes, e.g. arc welding and thermal cutting.
This document also specifies the test data to be marked on the capture devices.
It applies to the design and manufacture of parts of the equipment including hoods for welding, ducting, filter units, air movers, systems that inform of unsafe operation and workplace practices to ensure safe working with regard to exposure.
Significant hazards are listed in Clause 4. It does not cover electrical, mechanical and pneumatic hazards.
This document is applicable to:
— local exhaust ventilation systems (LEV) excluding draught tables;
— mobile and stationary equipment;
— separation equipment used for welding and allied processes;
This document is not applicable to:
— general ventilation, air make up or air movement systems;
— air conditioning systems;
— grinding dust.
This document applies to systems designed and manufactured after its publication.
NOTE Specific safety requirements for thermal cutting machines are defined in ISO 17916.
Arbeits- und Gesundheitsschutz beim Schweißen und bei verwandten Verfahren - Einrichtungen zum Erfassen und Abscheiden von Schweißrauch - Teil 1: Allgemeine Anforderungen (ISO 21904-1:2020)
Dieses Dokument legt die allgemeinen Anforderungen an Lüftungsanlagen zur Erfassung und Abscheidung der beim Schweißen und bei verwandten Prozessen, z. B. Lichtbogenschweißen und Brennschneiden, erzeugten Rauchemissionen fest.
Dieses Dokument legt auch die Prüfdaten fest, die auf den Erfassungseinrichtungen anzubringen sind.
Es gilt für die Konstruktion und Herstellung von Teilen der Anlage, einschließlich Schweißrauchabzugshauben, Lüftungskanäle, Filtereinheiten, Luftbewegungs¬einrichtungen und Warnsysteme zur Anzeige eines nicht sicheren Betriebs und eines gefährlichen Arbeitsplatzes, um ein sicheres Arbeiten bezüglich der Emissionsexposition sicherzustellen.
In Abschnitt 4 sind wesentliche Gefährdungen aufgelistet. Er behandelt keine elektrischen, mechanischen und pneumatischen Gefährdungen.
Dieses Dokument gilt für:
- örtliche Absaugungssysteme (LEV), außer abgesaugte Schweißtische;
- bewegliche und stationäre Anlagen;
- Abscheideeinrichtungen für Schweißen und verwandte Prozesse.
Dieses Dokument gilt nicht für:
- allgemeine lüftungstechnische Anlagen, Luftaufbereiter oder Luftbewegungssysteme;
- Klimaanlagen;
- Schleifstaub.
Dieses Dokument gilt für Systeme, die nach Veröffentlichung dieser Norm konstruiert und hergestellt wurden.
ANMERKUNG Spezifische Sicherheitsanforderungen für Maschinen zum thermischen Trennen werden in ISO 17916 festgelegt.
Hygiène et sécurité en soudage et techniques connexes - Equipements de captage et de filtration des fumées - Partie 1: Exigences générales (ISO 21904-1:2020)
Le présent document définit les exigences générales relatives à l'équipement de ventilation servant pour le captage et la filtration de fumées produites par le soudage et les techniques connexes par exemple, le soudage à l'arc et le procédé de coupage thermique.
Le présent document spécifie également les données d'essai qui doivent être marquées sur les dispositifs de captage.
Il s'applique à la conception et à la fabrication des pièces de l'équipement, notamment les bouches d'aspiration pour le soudage, les conduits, les unités de filtration, les dispositifs d'entraînement de l'air et les systèmes qui signalent un fonctionnement dangereux, et aux pratiques sur le lieu de travail visant à assurer un travail en toute sécurité en matière d'exposition.
Les phénomènes dangereux significatifs sont énumérés dans l'Article 4. Le présent document ne traite pas des phénomènes dangereux électriques, mécaniques et pneumatiques.
Le présent document est applicable:
— aux systèmes de ventilation par extraction localisée (LEV), à l'exclusion des tables aspirantes;
— aux équipements mobiles et fixes;
— équipement de filtration utilisé pour le soudage et les techniques connexes;
Le présent document ne s'applique pas:
— aux systèmes de ventilation générale, d'air d'appoint ou de déplacement d'air;
— aux systèmes de conditionnement d'air;
— à la poussière de meulage.
Le présent document est applicable aux systèmes fabriqués après sa date de publication.
NOTE Les spécifications de sécurité spécifiques pour les machines de coupage thermique sont définies dans la norme ISO 17916.
Zdravje in varnost pri varjenju in sorodnih postopkih - Oprema za zajem in ločevanje varilnega dima - 1. del: Splošne zahteve (ISO 21904-1:2020)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2020
Nadomešča:
SIST EN ISO 15012-4:2016
Zdravje in varnost pri varjenju in sorodnih postopkih - Oprema za zajem in
ločevanje varilnega dima - 1. del: Splošne zahteve (ISO 21904-1:2020)
Health and safety in welding and allied processes - Equipment for capture and
separation of welding fume - Part 1: General requirements (ISO 21904-1:2020)
Arbeits- und Gesundheitsschutz beim Schweißen und bei verwandten Verfahren -
Einrichtungen zum Erfassen und Abscheiden von Schweißrauch - Teil 1: Allgemeine
Anforderungen (ISO 21904-1:2020)
Hygiène et sécurité en soudage et techniques connexes - Equipements de captage et de
filtration des fumées - Partie 1: Exigences générales (ISO 21904-1:2020)
Ta slovenski standard je istoveten z: EN ISO 21904-1:2020
ICS:
13.040.40 Emisije nepremičnih virov Stationary source emissions
13.100 Varnost pri delu. Industrijska Occupational safety.
higiena Industrial hygiene
25.160.30 Varilna oprema Welding equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 21904-1
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2020
EUROPÄISCHE NORM
ICS 25.160.01; 13.100 Supersedes EN ISO 15012-4:2016
English Version
Health and safety in welding and allied processes -
Equipment for capture and separation of welding fume -
Part 1: General requirements (ISO 21904-1:2020)
Hygiène et sécurité en soudage et techniques connexes Arbeits- und Gesundheitsschutz beim Schweißen und
- Equipements de captage et de filtration des fumées - bei verwandten Verfahren - Einrichtungen zum
Partie 1: Exigences générales (ISO 21904-1:2020) Erfassen und Abscheiden von Schweißrauch - Teil 1:
Allgemeine Anforderungen (ISO 21904-1:2020)
This European Standard was approved by CEN on 31 January 2020.
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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21904-1:2020 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC aimed to be covered . 4
European foreword
This document (EN ISO 21904-1:2020) has been prepared by Technical Committee ISO/TC 44 "Welding
and allied processes" in collaboration with Technical Committee CEN/TC 121 “Welding and allied
processes” the secretariat of which is held by DIN.
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 September 2020, and conflicting national standards
shall be withdrawn at the latest by September 2020.
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 15012-4:2016.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For the relationship with EU Directive(s) see informative Annex ZA, which is an integral part of this
document.
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 21904-1:2020 has been approved by CEN as EN ISO 21904-1:2020 without any
modification.
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC aimed to be covered
This European Standard has been prepared under a Commission’s standardization request M/396
(Machinery) to provide one voluntary means of conforming to essential requirements of Directive
2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and
amending Directive 95/16/EC (recast).
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding essential requirements
of that EU Directive 2006/42/EC, and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and EU Directive 2006/42/EC
Essential Requirements of EU Clause(s)/subclause(s) Remarks/Notes
Directive 2006/42/EC
of this EN
1.5.13 5.1, 5.2, 5.3, 5.4, 6, 7
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
INTERNATIONAL ISO
STANDARD 21904-1
First edition
2020-02
Health and safety in welding and allied
processes — Equipment for capture
and separation of welding fume —
Part 1:
General requirements
Hygiène et sécurité en soudage et techniques connexes —
Equipements de captage et de filtration des fumées —
Partie 1: Exigences générales
Reference number
ISO 21904-1:2020(E)
©
ISO 2020
ISO 21904-1:2020(E)
© ISO 2020
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: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
ISO 21904-1:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Significant hazards . 4
5 Requirements and verifications . 4
5.1 General . 4
5.2 Extraction devices . 7
5.3 Ducting properties .13
5.4 Filters, related components and handling .15
6 Instructions for use .19
6.1 General .19
6.2 Extraction devices .19
6.2.1 Captor hoods and nozzles .19
6.2.2 On-torch extraction systems .20
7 Marking .20
7.1 General marking .20
7.2 Marking of separation efficiency .21
7.3 Marking of captor hoods and nozzles .21
7.4 Marking of on-torch extraction systems .21
Annex A (informative) Malfunctions and determination of minimum airflow .23
Annex B (normative) Label for welding fume separation equipment .24
Bibliography .25
ISO 21904-1:2020(E)
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/d irectives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www. iso. org/p atents).
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/f oreword. html.
This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes,
Subcommittee SC 9, Health and safety.
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.
Official interpretations of ISO/TC 44 documents, where they exist, are available from this page:
https://committee. iso. org/sites/ tc 44/ home/interpretation . html.
A list of all parts in the ISO 21904 series can be found on the ISO website.
This first edition cancels and replaces ISO 15012-4.
iv © ISO 2020 – All rights reserved
ISO 21904-1:2020(E)
Introduction
Welding and allied processes generate fumes and gases which, if inhaled, can be harmful to human
health. Therefore, control of the fumes and gases generated is to be exercised to minimize worker
exposure.
The most effective method of control is to capture the fumes and gases close to their source before they
enter a worker’s breathing zone or the general workplace environment.
Ventilation equipment used to capture the fumes and gases is to be fit for purpose because inefficient
capture can result in high exposure and can be detrimental to workers’ health. Therefore, it is important
that it adheres to defined manufacturing, materials and design requirements and gives warning of
malfunction.
This document is a type-C standard as stated in ISO 12100.
This document is of relevance, in particular, for the following stakeholder groups representing the
market players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);
— health and safety bodies (regulators, accident prevention organisations, market surveillance etc.);
Others can be affected by the level of machinery safety achieved with the means of the document by the
above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);
— machine users/employees (e.g. trade unions, organizations for people with special needs);
— service providers, e. g. for maintenance (small, medium and large enterprises);
— consumers (in case of machinery intended for use by consumers).
The above-mentioned stakeholder groups have been given the possibility to participate at the drafting
process of this document.
In addition, this document is intended for standardization bodies elaborating type-C standards.
The requirements of this document can be supplemented or modified by a type-C standard.
For machines which are covered by the scope of a type-C standard and which have been designed and
built according to the requirements of that standard, the requirements of that type-C standard take
precedence.
INTERNATIONAL STANDARD ISO 21904-1:2020(E)
Health and safety in welding and allied processes —
Equipment for capture and separation of welding fume —
Part 1:
General requirements
1 Scope
This document defines the general requirements for ventilation equipment used to capture and
separate fumes generated by welding and allied processes, e.g. arc welding and thermal cutting.
This document also specifies the test data to be marked on the capture devices.
It applies to the design and manufacture of parts of the equipment including hoods for welding, ducting,
filter units, air movers, systems that inform of unsafe operation and workplace practices to ensure safe
working with regard to exposure.
Significant hazards are listed in Clause 4. It does not cover electrical, mechanical and pneumatic
hazards.
This document is applicable to:
— local exhaust ventilation systems (LEV) excluding draught tables;
— mobile and stationary equipment;
— separation equipment used for welding and allied processes;
This document is not applicable to:
— general ventilation, air make up or air movement systems;
— air conditioning systems;
— grinding dust.
This document applies to systems designed and manufactured after its publication.
NOTE Specific safety requirements for thermal cutting machines are defined in ISO 17916.
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 cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13849-1:2015, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design
ISO 21904-2:2020, Health and safety in welding and allied processes — Equipment for capture and
separation of welding fume — Part 2: Requirements for testing and marking of separation efficiency
ISO 21904-1:2020(E)
ISO 21904-4:2020, Health and safety in welding and allied processes — Requirements, testing and marking
of equipment for air filtration — Part 4: Determination of the minimum air volume flow rate of captor
hoods and nozzles
IEC 60204-1:2005, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
IEC 60335-2-69:2012, Household and similar electrical appliances — Safety — Part 2-69: Particular
requirements for wet and dry vacuum cleaners, including power brush, for commercial use
IEC 60695-2-12:2010+A1: 2014, Fire hazard testing — Part 2-12: Glowing/hot-wire based test methods —
Glow-wire flammability index (GWFI) test method for materials
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12100:2010 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
welding fume separation equipment
air filtration equipment, the purpose of which is to separate particles generated by welding and allied
processes from workplace atmosphere
Note 1 to entry: Some separation equipment is designed to also remove gases generated by welding, but the
ISO 21904 series does not address the efficiency of gas separation.
3.2
filter cleaning system
system designed to clean the filter of welding fume separation equipment (3.1) in order to restore the air
flow rate through the filter when it is reduced by an accumulation of welding fume (3.13) particles
3.3
on-line filter cleaning system
filter cleaning system, either automatically or manually initiated, operating while welding fume
separation equipment (3.1) is running
3.4
off-line filter cleaning system
filter cleaning system, either automatically or manually initiated, operating after the air mover of the
filtration equipment is switched off
3.5
separation efficiency by mass
ratio of the mass of particles retained by welding fume separation equipment (3.1) to the mass of particles
entering the equipment during a given period
Note 1 to entry: General information on test methods for determination of separation efficiency is described in
EN 1093-6 and EN 1093-7.
3.6
local exhaust ventilation
LEV
use of extraction to remove contaminated air at or near to its source
2 © ISO 2020 – All rights reserved
ISO 21904-1:2020(E)
3.7
filter protector
device normally positioned at the intake of the welding fume separation equipment (3.1), used to
minimize the possibility of damaging impacts of sparks or large particles on filter media
Note 1 to entry: Filter media can also be protected against sparks and large particles by the internal design of the
welding fume separation equipment.
Note 2 to entry: Examples of filter protectors are cyclones, spin separators, baffles or sieves. A filter protector
may be designed to also protect against flame damage.
3.8
on-torch extraction device
on-gun extraction device
equipment, integrated or attached, on torch used for capturing welding fume (3.13), when connected to
an extraction source
Note 1 to entry: Due to the state of the art, on-torch extraction devices for TIG welding are not covered by this
definition.
Note 2 to entry: For an overview of the different extraction devices, see Figure 1.
Dimensions in metres
Key
3 3
1 on-torch extraction (3.8), 50 m /h to 100 m /h, 5 kPa to 18 kPa
3 3
2 high vacuum extraction (3.9), 100 m /h to 150 m /h, 5 kPa to 10 kPa
3 3
3 low vacuum extraction (3.9), 700 m /h to 1500 m /h, 800 Pa to 2 000 Pa
Figure 1 — Overview of extraction devices and common air volume flow rates and pressure
3.9
captor hood
captor nozzle
equipment, movable or static, used for capturing welding fume (3.13), when connected to an
extraction source
Note 1 to entry: For an overview of the different extraction devices, see Figure 1.
3.10
receiving hood
canopy
equipment, movable or static, normally positioned above a hot process, where the contaminated air is
propelled into it by process-induced air movement
ISO 21904-1:2020(E)
3.11
enclosure
chamber
fully or partially enclosed space where the process takes place, designed to contain and prevent the
escape of hazardous substances into the workshop air
3.12
suction equipment
unit with air mover and with or without a filter
3.13
welding fume
airborne particles typically with diameter smaller than 1 µm generated by welding and allied processes
3.14
minimum air volume flow rate
air volume flow rate required for acceptable capture of welding fume (3.13)
Note 1 to entry: The minimum air volume flow rate depends on the type and the geometric dimensions of the
capture device and the test positions selected to demonstrate the extent of the capture zone (see 7.3).
3.15
suction field
volume around a capture device, in which the air velocity required to capture welding fume (3.13) is
exceeded
4 Significant hazards
Exposure to welding fumes and gases generated by welding and allied processes can be detrimental to
health. Control of exposure can usually be achieved using ventilation equipment but any failure of this
equipment, such as poor design and the use of parts made of unsuitable materials, can result in reduced
extraction efficiency and hence over exposure and ill health.
Common health effects include respiratory disease, but exposure to carcinogenic substances during the
welding can occur and shall be considered.
The requirements of the ventilation equipment are dependent on the level of control necessary.
5 Requirements and verifications
5.1 General
The general requirements and corresponding verifications are given in Table 1.
4 © ISO 2020 – All rights reserved
ISO 21904-1:2020(E)
Table 1 — General requirements and verifications
Requirement Verification
1.1 Requirements for all Machinery shall comply with the safety requirements and/or protective/
equipment risk reduction measures in Clause 5. In addition, the machine shall be
designed according to the principles of ISO 12100:2010 for relevant but not
significant hazards which are not dealt with by this document.
All parts and materials used in the manufacture of welding fume ventila- Verification shall be performed by examining the
tion equipment shall withstand the conditions (thermal, mechanical, UV ra- manufacturer’s datasheets, the instruction manual,
diation) present in the environment in which they are intended to be used. and by referring to the manufacturer's long-term
experience with respective devices.
Equipment used for captur
...
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