ICS 73.040                         PCD 07

Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 2) (First Revision) which is identical with ISO 13909-2 : 2016 'Hard coal and coke - Mechanical sampling - Part 2: Coal - Sampling from moving streams' 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.

The standard was originally published in 2014 which superseded IS 436 (Part 1/Sec 2) : 1976 'Methods for sampling of coal and coke: Part 1 Sampling of coal, Section 2 Mechanical sampling' and IS 436 (Part 2) : 1965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 ISO 13909-2 : 2016.

The major changes in this revision are as follows:

a) Normative reference (2) has been updated;

b) Continuous and intermittent sampling (4.2) and Sub-lot variance (4.4.3) have been removed;

c) Clauses 4.2.3, 4.3.1, 4.3.2; 6.8.1, 6.9.1 and 6.9.2 have been modified;

d) Table 1 has been updated; and

e) Figure for example of cross belt sampler showing the location of the reinforced skirting (Fig 3) has been included.