Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (First Revision) which is identical with ISO 349 : 2020 ‘Hard coal - Audibert-Arnu dilatometer test’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the Solid Mineral Fuels and Solid Biofuels Sectional Committee and approval of the Petroleum, Coal and Related Products Division Council.

This standard was first published in 2018 as an adoption of ISO 349 : 1975. The first revision of this standard has been undertaken to align it with the latest version of ISO 349 : 2020.