This Part of GB/T 19494 specifies the terms and definitions, general principles and precision of sampling, establishing a sampling scheme, coal-sampling from moving streams, coal-sampling from stationary lots, packing and marking of coal samples as well as sampling report for the mechanical sampling of coal.
This Part is applicable to brown coals, bituminous coals and hard coals.
Foreword i
1 Scope 1
2 Normative References 1
3 Terms and Definitions 2
4 General Principles and Precision of Sampling 5
5 Establishing a Sampling Scheme 6
6 Coal-sampling from Moving Streams 13
7 Coal-sampling from Stationary Lots 19
8 Packing and Marking of Coal Samples 24
9 Sampling Report 25
Appendix A (Informative) Examples of Calculations of the Number of Sampling Units and Number of Increments per Sampling Unit 26
Appendix B (Normative) Evaluation of Sampling Equipment for Mass-basis Sampling 28
