NATIONAL FOREWORD

This Indian Standard (Part 4) (First Revision) which is identical with ISO 13909-4 : 2016 ‘Hard coal and coke - Mechanical sampling - Part 4: Coal - Preparation of test samples’ 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This standard was first published in 2014 which superseded IS 436 (Part I/Sec 2) : 1976 ‘Methods for sampling of coal and coke: Part 1 Sampling of coal, Section 2 Mechanical sampling’ and IS 436 (Part 2) : 1965 ‘Methods of sampling of coal and coke: Part 2 Sampling of coke ( revised )’. The first revision of this standard has been undertaken to align it with the latest version of 13909-4 : 2016.