ASTM D7430-08
Standard Practice for Mechanical Sampling of Coal

Standard No.

ASTM D7430-08

Release Date

2008

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D7430-08a

Latest

ASTM D7430/D7430M-22

Scope

It is intended that this practice be used to provide a sample representative of the coal from which it is collected. Because of the variability of coal and the wide variety of mechanical sampling equipment available, caution should be used in all stages of the sample collection process, the design of sampling system specifications, the equipment procurement and the acceptance testing of installed equipment.

After removal from the sampling system and further preparation (Practice D 2013), the sample may be analyzed for a number of different parameters. These parameters may define the lot''s value, its ability to meet specifications, its environmental impact, as well as other properties.

1.1 This practice is divided into 4 parts. These 4 parts represent the previous standards D 7256/D 7256M, D 4916, D 4702, and D 6518. 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.

1.2 Part A—Mechanical Collection and Within-System Preparation of a Gross Sample of Coal from Moving Streams8212;Covers procedures for the mechanical collection of a sample under Classification I-B-1 and I-B-2 (Practice D 2234/D 2234M) and the within-system preparation (reduction and division) of gross samples utilizing various components of the mechanical sampling system.

1.2.1 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.

1.3 Part B—Mechanical Auger Sampling—8212;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 D 2013.

1.4 Part C—Quality Management of Mechanical Coal Sampling Systems8212;Is applicable to the quality management of cross-belt, falling stream, and auger sampling systems.

1.4.1 Spacing of increments pertains to the kind of interval between increments. Intervals can be defined in quantitative terms, such as units of time or mass, or in terms of position over the lot.

1.4.2 Spacing of Increments for Cross-Belt and Falling Stream Samplers8212;Cross-belt and falling stream type mechanical sampling systems take increments based on time, either at fixed time intervals or at random times during a fixed time strata. Some falling stream samplers can take increments based on equal mass of coal sampled as determined by scales. The sections of this practice that pertain to cross-belt and falling stream samplers describe procedures for only time-based sampling systems. This time-based inspection guideline will satisfy most criteria for mass-based or combination mass-based and time-based sampling systems. If there are items that are not covered, the inspector should refer to the manufacturer''s literature.

1.4.3 Spacing of Increments for Auger Sampling8212;The spacing of increments collected by auger sampl......

ASTM D7430-08 history

• 2022 ASTM D7430/D7430M-22 Standard Practice for Mechanical Sampling of Coal
• 2021 ASTM D7430/D7430M-21 Standard Practice for Mechanical Sampling of Coal
• 2020 ASTM D7430/D7430M-20 Standard Practice for Mechanical Sampling of Coal
• 2018 ASTM D7430-18ae1 Standard Practice for Mechanical Sampling of Coal
• 2018 ASTM D7430-18a Standard Practice for Mechanical Sampling of Coal
• 2018 ASTM D7430-18 Standard Practice for Mechanical Sampling of Coal
• 2017 ASTM D7430-17 Standard Practice for Mechanical Sampling of Coal
• 2016 ASTM D7430-16be1 Standard Practice for Mechanical Sampling of Coal
• 2016 ASTM D7430-16b Standard Practice for Mechanical Sampling of Coal
• 2016 ASTM D7430-16a Standard Practice for Mechanical Sampling of Coal
• 2016 ASTM D7430-16 Standard Practice for Mechanical Sampling of Coal
• 2015 ASTM D7430-15b Standard Practice for Mechanical Sampling of Coal
• 2015 ASTM D7430-15a Standard Practice for Mechanical Sampling of Coal
• 2015 ASTM D7430-15 Standard Practice for Mechanical Sampling of Coal
• 2014 ASTM D7430-14 Standard Practice for Mechanical Sampling of Coal
• 2013 ASTM D7430-13 Standard Practice for Mechanical Sampling of Coal
• 2012 ASTM D7430-12b Standard Practice for Mechanical Sampling of Coal
• 2012 ASTM D7430-12a Standard Practice for Mechanical Sampling of Coal
• 2012 ASTM D7430-12 Standard Practice for Mechanical Sampling of Coal
• 2011 ASTM D7430-11ae1 Standard Practice for Mechanical Sampling of Coal
• 2011 ASTM D7430-11a Standard Practice for Mechanical Sampling of Coal
• 2011 ASTM D7430-11 Standard Practice for Mechanical Sampling of Coal
• 2010 ASTM D7430-10b Standard Practice for Mechanical Sampling of Coal
• 2010 ASTM D7430-10a Standard Practice for Mechanical Sampling of Coal
• 2010 ASTM D7430-10 Standard Practice for Mechanical Sampling of Coal
• 2009 ASTM D7430-09 Standard Practice for Mechanical Sampling of Coal
• 2008 ASTM D7430-08ae1 Standard Practice for Mechanical Sampling of Coal
• 2008 ASTM D7430-08a Standard Practice for Mechanical Sampling of Coal
• 2008 ASTM D7430-08 Standard Practice for Mechanical Sampling of Coal