ASTM International

Standard Practice for Mechanical Sampling of Coal
 N D7430 REV B

Annotation

This practice is divided into 4 parts. These 4 parts represent the previous standards D7256/D7256M, D4916, D4702, and D6518. These 4 standards are the 4 that govern the mechanical sampling of coal and have been combined into one document for the ease of reference of the users of these standards.

Part A

Part A—Mechanical Collection and Within-System Preparation of a Gross Sample of Coal from Moving Streams— Covers procedures for the mechanical collection of a sample under Classification I-B-1 and I-B-2 (Practice D2234/ D2234M) and the within-system preparation (reduction and division) of gross samples utilizing various components of the mechanical sampling system.

Part A describes mechanical sampling procedures for coals (1) by size and condition of preparation (for example, mechanically cleaned coal or raw coal), and (2) by sampling characteristics.

The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

Part B

Part B—Mechanical Auger Sampling—Describes procedures for the collection of an increment, partial sample, or gross sample of material using mechanical augers. Reduction and division of the material by mechanical equipment at the auger is also covered. Further manual or mechanical reduction or division of the material elsewhere shall be performed in accordance with Practice D2013.

The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.