Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 1) which is identical to 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’ issued by the International Organization for Standardization (ISO), was adopted by the Bureau of Indian Standards on the recommendation of the Welding General and its Applications Sectional Committee and approval of the Metallurgical Engineering Division Council.

This standard was originally published in 2018 adopting ISO 15012-1:2013 under dual numbering system. As ISO 15012-1:2013 has been replaced by ISO 21904-2 : 2020, hence, first revision of this standard has been undertaken to align it with the ISO 21904-2 : 2020.