Standard No.:	GB 475-2008
English Name:	Method for manual sampling of commercial coal
Chinese Name:	商品煤样人工采取方法
Chinese Classification:	D21    Coal analysis methods
Professional Classification:	GB    National Standard
Issued by:	AQSIQ; SAC
Issued on:	1983-06-15
Implemented on:	2009-5-1
Status:	valid
Superseding:	GB 475-1996 Sampling for commercial coal
Language:	English
File Format:	PDF
Word Count:	13000 words
Price(USD):	200.0
Delivery:	via email in 1 business day

This standard defines the terms and definitions in manual sampling of commercial coal and describes the general principles of sampling. It specifies sampling precision, establishment of sampling scheme, sampling methods, manual sampling equipment, package and marking of coal sample and a sampling report. This standard is applicable to lignite, soft coal and hard coal.

Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 General Principles of Sampling and Sampling Precision 4.1 General Principles of Sampling 4.2 Sampling Precision 5 Sampling Scheme 5.1 Selection of Sampling Scheme 5.2 Basic Sampling Scheme 5.3 Design of Special Sampling Scheme 6 Sampling Method-Sampling Method for Primary Increment 6.1 Sampling of Coal Stream in Motion 6.2 Sampling of Stationary Coal 7 Intermittent Sampling 8 Taking of Various Coal Samples 9 Manual Sampling Equipment 9.1 Basic Requirements for Manual Sampling Equipment 9.2 Examples 10 Package and Marking of Coal Sample 11 Sampling Report Annex A (Informative) Comparison of Chapter and Article Numbers between this Standard and ISO 18283:2006(E) Annex B (Informative) Technical Differences between This Standard and ISO 18283:2006(E) and their Reasons Annex C (Normative) Sampling Precision Verification and Bias Test Annex D (Informative) Example of Calculation of Mass of Increment, Number of Sampling Units and Number of Increments per Sampling Unit Annex E (Informative) Treatment Method for Lump Materials with a Size Exceeding 150mm or Other Sizes