BSENIS021904-4:2020 Incorporating corrigendum August 2024 BSl Standards Publication Health and safety in welding and allied processes Equipment for capture and separation of welding fume Part 4: Determination of the minimum air volume flow rate of capture devices bsi. BSENIS021904-4:2020 BRITISH STANDARD National foreword This British Standard is theUK implementationof ENIS021904-4:2020.ItisidenticaltoIS021904-4:2020.Itsupersedes BSEN IS0 15012-2:2008, which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee WEE/40, Health and safety in welding. Alistof organizationsrepresentedonthis committeecanbe obtained on request to its committee manager. Contractual and legal considerations Thispublication hasbeen prepared in good faith, however no representation,warranty,assurance or undertaking (express or implied) is or will bemade, and no responsibility or liability is or will be reasonableness of thispublication.All and any suchresponsibility and liability is expresslydisclaimed to the full extent permitted bythelaw. This publication is provided as is,and is to be used at the recipient's own risk. The recipient is advised to consider seeking professional guidance with respecttoitsuseofthispublication. This publication is not intended to constitute a contract. Users are responsibleforits correctapplication. TheBritishStandards Institution2024 Published byBSI Standards Limited 2024 ISBN9780539331332 ICS13.100;25.160.30 Compliancewith a British Standard cannotconfer immunityfrom legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31March 2020. Amendments/corrigendaissuedsincepublication Date Textaffected 31August2024 Correctiontosupersessiondetailsinnational foreword BSENIS021904-4:2020 EN IS0 21904-4 EUROPEANSTANDARD NORME EUROPEENNE EUROPAISCHE NORM March 2020 ICS13.100;25.160.30 SupersedesENIS015012-2:2008 English Version Health and safety in welding and allied processes Equipment for capture and separation of welding fume Part 4: Determination of the minimum air volume flow rate of capture devices (Is0 21904-4:2020) Hygiene et securite en soudage et techniques connexes Arbeits- und Gesundheitsschutz beim Schweifen und - Equipements de captage et de filtration des fumees - bei verwandten Verfahren - Einrichtungen zum Partie 4: Détermination du debit volumique minimal Erfassen und Abscheiden von Schweifrauch - Teil 4: d'air des dispositifs de captage (IS0 21904-4:2020) Bestimmendes Mindestluftvolumenstromes von Absaugeinrichtungen (Is0 21904-4:2020) This European Standard was approved by CEN on 20 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 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. cen EUROPEAN COMMITTEE FOR STANDARDIZATION COMITEEUROPEENDENORMALISATION EUROPAISCHES KOMITEE FUR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels @2020CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21904-4:2020 E worldwide for CEN national Members